CN214115390U - Fertilizer air atomization whitewashing granulation system - Google Patents

Abstract

The utility model relates to an organic fertilizer air atomization guniting granulation system, which comprises a mushroom dreg storage tank, a mushroom dreg conveying pipeline, a guniting granulator, a compressed air spray gun, an induced draft pipeline, an induced draft fan, a waste gas treatment system and a chimney, wherein one end of the mushroom dreg conveying pipeline is communicated with the mushroom dreg storage tank, and the other end is connected with the compressed air spray gun; the spray gun is arranged at the head of the barrel of the granulator and carries out spraying, atomizing and granulating through compressed air; the granulator tail is sequentially communicated with the waste gas treatment system, the induced draft fan and the chimney through an induced draft pipeline; the guniting granulator comprises an external screening and returning system, and the external screening and returning system returns materials from the tail of the granulator to the head and/or the middle drying section. The utility model discloses reducible fertilizer granule has avoided fertilizer to relapse the granulation through the handling capacity of the outer returning charge mode of tradition, destroys its solubility, improves exhaust-gas treatment's efficiency.

Description

Fertilizer air atomization whitewashing granulation system

Technical Field

The utility model relates to a fertilizer technical field, concretely relates to fertilizer air atomization whitewashing granulation system.

Background

The organic fertilizer is mainly derived from plants and/or animals, and is a carbon-containing material which is applied to soil to provide plant nutrition as a main function. Is prepared from biological substances, animal and plant wastes and plant residues, eliminates toxic and harmful substances in the biological substances, and is rich in a large amount of beneficial substances, including: various organic acids, peptides and rich nutrient elements including nitrogen, phosphorus and potassium. The fertilizer not only can provide comprehensive nutrition for crops, but also has long fertilizer efficiency, can increase and update soil organic matters, promote microbial propagation, improve the physical and chemical properties and biological activity of soil, and is a main nutrient for green food production.

The spraying granulator is an indispensable device in the production process of organic fertilizer. The traditional spray granulation process adopts steam atomization material spray granulation, and the principle is as follows: feed liquid (such as antibiotic bacteria slag liquid and bacteria liquid) to be dried and granulated is atomized by steam, enters the granulator from the head (nose) of the granulator and is contacted with small-particle fertilizer at the nose, the bacteria liquid is quickly attached to the outer layer of the small-particle fertilizer under the action of hot air entering from the side face of the nose, the material is quickly lifted by a shoveling plate on the inner wall of the granulator and moves to the tail (tail) of the granulator, and fertilizer particles are enlarged to form fertilizer particles with uniform particles and meeting the requirements.

In the process of fertilizer molding and granulation, fertilizer particles with unqualified sizes can be formed, and smaller particles and larger particles need to return to a machine head for spraying and granulation again. Generally, a cone-shaped grading cone is arranged between a drying section and a tail of the granulator, the section with a large caliber is connected with the drying section of the granulator, and one end with a small caliber is connected with the tail. Because the granulator drum is installed at a certain inclination angle, and the head is higher than the tail, when particles enter the grading cone from the tail of the drying section, because large-particle-size materials and small-particle-size materials have different natural stacking angles, the small particles sink to the bottom in the rotation process of the granulator drum, enter the built-in return pipe (or an internal return spiral pipe) installed at the bottom of the conical surface of the grading cone by a tangent line, return to the head for spraying granulation again, and oversized particle materials enter the screen to be screened, crushed and then return to the head from an external return system for spraying granulation again.

Present grading awl designs for conical surface smooth structure usually, including the direct opening of return pipe entry of conical surface bottom installation, therefore, the material granule that leads to qualified size and large-size material granule also can enter into the return pipe easily, thereby lead to final fertilizer granule size to grow up, and spray drying repeatedly leads to the inside coking of final fertilizer granule and influences the solubility of fertilizer, large granule fertilizer still agglomerates at the middle part drying section of granulator cylinder easily, finally, the material of machine halt clearance caking, not only cause the solubility of fertilizer to descend, and influence the normal production of spray granulation.

In addition, the material returning spiral pipe returns the aircraft nose along the inner wall from the tail in setting up in whitewashing granulator barrel, occupies granulator inner space on the one hand, influences granulation productivity, and on the other hand, the inside caking that also can form of material returning spiral pipe blocks up and is not convenient for clean. The existing external material returning system returns to the machine head to carry out guniting granulation again, materials need to be screened and crushed in advance and then lifted to the machine head for feeding by the external lifting system, material dust is caused, energy consumption is increased, and the production cost of guniting granulation is increased.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to prior art's defect and not enough, provide a fertilizer air atomization whitewashing granulation method and system, satisfy compound fertilizer fertilization and dissolve the requirement fast, reduce compound fertilizer production's manufacturing cost, eliminate dust pollution that outer returning charge system brought and the system windage that tail gas dust removal causes is big, the purpose of the high problem of energy consumption.

In order to realize the purpose, the utility model provides an organic fertilizer air atomization guniting granulation system, which comprises a bacteria residue storage tank, a bacteria residue conveying pipeline, a guniting granulator, a compressed air spray gun, an induced draft pipeline, an induced draft fan, a waste gas treatment system and a chimney, wherein,

one end of the fungus dreg conveying pipeline is communicated with the fungus dreg storage tank, and the other end of the fungus dreg conveying pipeline is connected with the compressed air spray gun;

the spray gun is arranged at the head of the barrel of the granulator and carries out spraying, atomizing and granulating through compressed air;

the granulator tail is sequentially communicated with the waste gas treatment system, the induced draft fan and the chimney through an induced draft pipeline;

the guniting granulator comprises an external screening and returning system, and the external screening and returning system returns materials from the tail of the granulator to the head and/or the middle drying section.

According to an aspect of the utility model, exhaust treatment system includes through cyclone, spray column, wet-type electrostatic precipitator, condenser, low temperature plasma equipment that the induced air pipeline communicates in proper order.

According to the utility model discloses an aspect, the draught fan does the whitewashing granulator waste gas treatment system provides the negative pressure to pump drainage the waste gas that the whitewashing granulator produced in the granulation process, the pressure of draught fan is 0.7-0.75 MPa.

According to the utility model discloses an aspect, the draught fan is the frequency conversion draught fan, the power of draught fan is 315 kw.

According to an aspect of the utility model, waste gas gets into separation recovery material behind the cyclone.

According to the utility model discloses an aspect, the spray column is spiral-flow type industrial waste gas spray column, waste gas is followed spray column tower bottom gets into, and it is right to spray liquid spray column tower height direction is ascending, in, three lower entering spray columns of body height is waste gas sprays.

According to one aspect of the utility model, the spraying liquid is water, the spraying liquid pressure is 0.15-0.4MPa, and the change is performed every 4 hours.

According to the utility model discloses an aspect, the spray column is two-stage series connection's spiral-flow type industrial waste gas spray column, including one-level spray column and second grade spray column, wherein, the inside top of one-level spray column sets up the one deck whirl board, the inside separation of second grade spray column sets up the three-layer whirl board, the whirl board is arranged in separating the droplet of detaching in the gas, spray header and atomizing shower head set up whirl board top and/or below.

According to an aspect of the utility model, the air heater is connected to whitewashing granulator's aircraft nose, be used for to 600-.

According to an aspect of the utility model, the compressed air spray gun links to each other with air compressor, the compressed air temperature is 80 ℃, and pressure is 0.5-0.6 Mpa.

According to an aspect of the utility model, the mushroom dreg storage tank communicates the steam pipe for to the input temperature is 100-mangling 120 ℃ steam in the mushroom dreg storage tank.

According to one aspect of the utility model, the external screening return system comprises an external return pipe, the external return pipe comprises a first external return pipe, a first external return pipe inlet and a first external return pipe outlet, and the first external return pipe is spirally installed on the outer wall of the cylinder body of the guniting granulator;

a grading cone is arranged between the drying section and the tail of the barrel of the guniting granulator and comprises a cone and a guide cylinder, the cone is a hollow barrel with two open ends and smooth inner wall, the guide cylinder is communicated with the small-diameter open end of the cone, and a grading cone screen is arranged on the grading slope surface of the cone;

the inlet of the first outer return pipe is communicated with a cavity formed by enclosing the tail and the grading cone, and the outlet of the first outer return pipe is communicated with the drying section cylinder of the granulator.

According to one aspect of the utility model, the external screening and returning system further comprises a hoisting machine, a screening machine, a crushing machine and a second external returning pipe which are sequentially connected through a closed pipeline; the second outer return pipe is communicated with the machine head of the granulator; the hoister is communicated with the tail of the granulator.

According to the utility model discloses an aspect, be provided with in the granulator barrel and follow the granulator tail extends to the interior returning charge spiral pipe of granulator aircraft nose, first outer return pipe export with interior returning charge spiral pipe intercommunication.

According to the utility model discloses an aspect, interior returning charge spiral pipe entry end sets up between the dry section of granulator barrel and the tail section, interior returning charge spiral pipe entry end be provided with the unanimous filter screen of mesh diameter of hierarchical awl screen cloth, first outer returning charge pipe export with interior returning charge spiral pipe entry end or middle section intercommunication.

According to the utility model discloses an aspect, first outer return pipe export intercommunication granulator aircraft nose drying section barrel.

According to one aspect of the invention, the mesh diameter of the classifying conical screen is determined according to the granulation diameter of the guniting granulator, preferably 0.6-0.9 times the granulation diameter, more preferably 0.8 times the granulation diameter.

According to the utility model discloses an aspect, hierarchical awl screen cloth with cone integrated into one piece, hierarchical awl screen cloth does hierarchical domatic upper distribution hole is constituteed.

According to an aspect of the utility model, the classifying cone screen cloth with cone integrated into one piece, the classifying cone screen cloth is the trapezoidal screen ring of width 10cm-50 cm.

According to the utility model discloses an aspect, the grading awl screen cloth with the cone components of a whole that can function independently shaping, the grading awl screen cloth is width 10cm-50 cm's trapezoidal sieve ring, trapezoidal sieve ring is fixed through welding or buckle the grading of cone is domatic.

According to an aspect of the utility model, trapezoidal sieve ring sets up the inner wall of cone is close to the minor diameter open end of cone.

According to an aspect of the utility model, trapezoidal sieve ring sets up the inner wall of cone is close to the major diameter open end of cone.

According to an aspect of the utility model, trapezoidal sieve ring sets up the inner wall central authorities of cone.

According to the utility model discloses an aspect, trapezoidal screen ring sets up to the divided multistage, and the centre sets up hierarchical domatic light ring.

According to an aspect of the utility model, the draft tube with cone joint position sets up annular retaining ring, the draft tube be with the cavity barrel of cone symmetry or the straight section of thick bamboo of asymmetric cavity.

According to an aspect of the invention, at least one vibration device is arranged on the outer wall surface of the cone.

According to an aspect of the invention, the vibrating device is arranged near the classifying cone screen.

According to an aspect of the utility model, vibrating device sets up on the outer wall of the cone that hierarchical domatic light ring corresponds.

According to an aspect of the invention, the vibrating device is a vibrating hammer, an air hammer or a chain.

According to an aspect of the utility model, the vibration hammer is an arc-shaped round pipe with one closed end, and an iron ball body is arranged in the vibration hammer.

According to an aspect of the utility model, set up on the water conservancy diversion section of thick bamboo wall with the mesh diameter unanimous of hierarchical awl screen cloth mesh.

According to the utility model discloses an aspect, the whitewashing granulator still includes feeding case and ejection of compact case, the ejection of compact case is including ejection of compact case box, ejection of compact case box cover is established on the tail of whitewashing granulator, whitewashing granulator tail can free rotation in the ejection of compact case box, first outer return pipe import sets up the whitewashing granulator with on the barrel outer wall at ejection of compact case box connection position.

According to the utility model discloses an aspect, the feeding case includes the feeding case box, feeding case box cover is established on the aircraft nose of whitewashing granulator, whitewashing granulator aircraft nose can freely rotate in the feeding case box, first outer return pipe export sets up whitewashing granulator with on the barrel outer wall at feeding case box connection position.

According to the utility model discloses an aspect, the outer return pipe of second sets up on the feeding case box, the outer return pipe of second passes follow behind the feeding case box lateral wall whitewashing granulator aircraft nose stretches into.

According to an aspect of the present invention, the first outer return pipe is wrapped with a heat insulating layer, preferably a heat insulating cotton.

According to the utility model discloses an aspect, first outer return pipe includes two, and the symmetry is installed on the outer wall of whitewashing granulator barrel.

According to one aspect of the utility model, the sieving machine is communicated with the outlet at the lower end of the discharge box body of the guniting granulator, and the crushing machine is communicated with the sieving machine through a pipeline; air inlets are formed in the feeding port of the screening machine and the feeding port of the crushing machine, at least 1 closed pipeline is respectively arranged between the discharging end of the screening machine and the head of the granulator and between the discharging end of the crushing machine and the head of the granulator, and dust and gas generated by the screening machine and the crushing machine enter the granulator through the closed pipelines.

According to the utility model discloses an aspect, the granulator aircraft nose is provided with the outer return tube of second, the hot-blast import of aircraft nose is kept away from to the outer return tube blanking mouth position of second, and with the spray gun dislocation set, the spray gun is located on the barrel center axis of granulator, the outer return tube blanking mouth of second sets up near the inner wall of granulation section barrel.

According to an aspect of the utility model, the nozzle is compared the outer return tube blanking mouth of second is closer to the aircraft nose.

According to the utility model discloses an aspect, the outer return pipe blanking mouth of second is multiple spot distributed architecture, including 2 or a plurality of blanking mouths.

According to the utility model discloses an aspect, the outer return pipe of second is many to arrange the outer return pipe of second or a second of aircraft nose to the aircraft nose extends to back a plurality of branch return pipes of subdividing, many outer return pipes of second or a plurality of branch return pipe arrange with granulator barrel the central axis bilateral symmetry on a periphery and arrange or divide left, well and right symmetrical arrangement, perhaps arrange a plurality of outer return pipes of second or a plurality of branch return pipe from the aircraft nose to dry section direction interval 30-50 cm.

According to an aspect of the utility model, the blanking mouth of the outer return pipe of second or branch return pipe is slit formula opening and/or the trapezoidal hopper of sieve mesh is taken to the bottom.

According to one aspect of the utility model, set up vibrating device on the outer return pipe of second outside the granulator aircraft nose, vibrating device is the air hammer, vibrates at an interval outer return pipe of second, and preferred interval time is 1-5 minutes/time.

According to an aspect of the utility model, the spray gun includes barrel and nozzle, the nozzle is atomizer, the barrel includes material pipe, trachea, blending bunker, the nozzle is located the front end of barrel blending bunker, material pipe with double-deck sleeve pipe is constituteed to the trachea, double-deck sheathed tube inner tube is managed for the material, double-deck sheathed tube outer tube is the trachea, trachea and air compressor intercommunication, the blending bunker is located its tip of double-deck sheathed tube anterior segment and trachea and material pipe intercommunication.

According to an aspect of the utility model, the front end of barrel sets up the bleeder of a plurality of intercommunications, a plurality of nozzles communicate the setting respectively and are in the end of bleeder, preferably the bleeder sets up on a periphery, more preferably the equidistant angle setting of bleeder is on a periphery.

According to the utility model discloses an aspect, the interval distance 30-50 cm intercommunication sets up a plurality of bleeder on the barrel, the end of bleeder sets up the nozzle, the material curtain that the nozzle formed towards returning charge curtain, granulation section flight carries out the whitewashing and atomizes.

According to one aspect of the present invention, the number of the nozzles is three, the first nozzle, the second nozzle and the third nozzle are sequentially included from the end portion to the middle portion of the barrel, and the spacing distance between the first nozzle, the second nozzle and the third nozzle is 30-50 cm; the first, second and third nozzles may be simultaneously fired in a fan-shaped manner.

Compared with the prior art, the utility model, following beneficial effect has:

1) the utility model discloses, when the fertilizer granule removes the position of hierarchical awl screen cloth from the granulator aircraft nose, on the one hand through rotatory, the natural screening effect between the big or small granule carries out big or small granule separation, the granule is to the hierarchical awl screen cloth gathering of bottom, hierarchical awl screen cloth has played the effect to fertilizer screening at the granulator tail, both increased the return material volume of granule, alleviate again that fertilizer granule comes out from the tail and gets into follow-up screening plant and smash again, outside hoisting device processingquantity, energy-conservation, consumption reduction's effect has been played.

On the other hand, the small particles fall out of the mesh of the grading cone screen mesh, enter a cavity formed by the tail of the granulator and the grading cone in a surrounding mode, and enter the first outer return pipe through the inlet of the first outer return pipe. Along with the rotation of granulator barrel, the drying section of granulator is transported from the tail to the tiny particle fertilizer by first outer return pipe of outer spiral setting on the granulator barrel outer wall, if be provided with interior return material spiral pipe in the granulator, then can directly return the aircraft nose drying section to carry out the granulation again through the first outer return pipe export of returning to material spiral pipe in getting into with interior return material spiral pipe intercommunication.

Because the small granular fertilizer after being screened by the grading cone screen mesh directly passes through the first external spiral external return pipe arranged on the outer wall of the granulator barrel, the automatic extraction, transportation and re-granulation of the small granular fertilizer at the tail can be realized by utilizing the natural rotation of the granulator barrel, the efficiency is improved, the fertilizer granules come out from the tail and enter a subsequent screening device to be crushed, and the processing amount of the external lifting device is reduced, on one hand, the field working environment can be improved, the dust is reduced, on the other hand, the energy consumption caused by opening an external return system can be reduced, and the energy-saving effect is obvious.

Simultaneously, the filter screen that interior returning charge spiral pipe entry end set up has still avoided large granule fertilizer to return the aircraft nose through setting up the interior returning charge spiral pipe in hierarchical awl bottom to lead to super large granule fertilizer to generate, deteriorate the solubility of fertilizer.

2) The utility model discloses, set up vibrating device on hierarchical awl outer wall, can eliminate hierarchical awl screen mesh and probably blockked up by the suitable fertilizer granule of particle diameter to reduce the hidden danger of hierarchical screening effect. For example, when the vibrating device rotates to the top end or is close to the top end along with the grading cone, the ball in the vibrating hammer naturally falls down and is knocked on the outer wall of the grading cone, and the knocking effect is formed on the screen mesh, so that particles blocked in the mesh are shaken out. In the chain type vibration device, the reciprocating knocking to the screen is periodically formed along with the periodic rotation of the grading cone, and the particles blocked in the mesh holes are knocked out. In the case of a pneumatic hammer, the screen is periodically hammered to shake out particles that have become lodged in the mesh.

3) The utility model discloses, draft tube and cone combination position set up annular retaining ring, can play and stop not in time sieve, not sneak into the draft tube from the little granular fertilizer that hierarchical awl screen cloth got into the returning charge spiral.

4) The utility model discloses, the draft tube sets up to the cavity barrel with the cone symmetry, can accelerate the overflow rate of finished product fertilizer, avoids fertilizer to pile up at the tail, and production efficiency is high.

5) The utility model discloses, the trapezoidal screen ring of grading awl screen cloth sets up the multistage of separation, the centre sets up hierarchical domatic light ring, be convenient for set up many places vibrating device on the grading awl outer wall, in time strike on the one hand and eliminate the jam of granule to grading awl screen cloth mesh, keep the smooth of grading awl screen cloth, sieve effectually, on the other hand can utilize the domatic inclination of hierarchical domatic light ring to have the screening effect to granular fertilizer itself, let granular fertilizer gather to the bottom fast, thereby sieve smoothly from the grading awl screen cloth of neighbouring.

6) The utility model discloses, set up on the water conservancy diversion section of thick bamboo wall with the mesh that hierarchical awl screen cloth mesh diameter is unanimous also can play the effect of further screening to the fertilizer granule, can reduce unqualified fertilizer granule and sneak into the chance that gets into the tail to alleviate the fertilizer granule and come out from the tail and get into follow-up screening plant handling capacity.

7) The utility model discloses promote fertilizer in the returning charge device outward, the screening, kibbling relevant pipeline carries out airtight design, and communicate through airtight pipeline and granulator aircraft nose, utilize the negative pressure suction that the draught fan provided, can be to the fertilizer granule at the screening machine, produced dust and smell are whole to inhale the granulator (for the negative pressure in the granulator) through airtight pipeline in the breaker, control is for being little negative pressure for organism external environment in the granulator system, and the exhaust gas treatment system through the tail connection sprays and absorbs dust and smell, can eliminate and adopt including the screening machine, during the outer returning charge system of rubbing crusher, dust and the gaseous periphery that produces because of screening and crushing leak, therefore the on-the-spot dust of granulation and atmospheric pollution have been reduced, protection field operation workman is healthy in mind and body.

8) The utility model discloses adopt whirl spray column to replace traditional venturi to remove dust to waste gas, increased exhaust gas channel's transverse cutting area, realized reducing the windage and ensured that whole granulation system is little negative pressure and forms and the operation is stable, reduces the wind speed and still is favorable to improving the treatment effect that follow-up environmental protection was administered the facility, and motor energy consumption reduces under the equal negative pressure condition, and the negative pressure is bigger under equal energy consumption, the system operation is more steady. Meanwhile, the cyclone plate arranged in the spray tower can also remove fog drops carried by the waste gas after washing, and the demisting load of a subsequent treatment device is reduced.

9) The utility model discloses, adopt compressed air whitewashing atomizing material feeding to replace the high-pressure steam feeding of traditional whitewashing granulator, owing to adopt the high-pressure steam feeding to increase the material water content, can lead to the system energy consumption to rise, increased material drying time under the same circumstances, lead to the returning charge number of times to reduce the solubility of fertilizer. And the material feeding is atomized by adopting compressed air guniting, the pressure reaches 0.5-0.6Mpa and is higher than the pressure (0.4Mpa) of steam feeding, the air temperature is raised to more than 80 ℃ after the air is compressed, and the water content of the compressed air is greatly reduced by a water removal facility carried by an air compressor, so that the problems that the high-pressure steam feeding is high in water content, the energy consumption of a system is increased, the material drying and retention time needs to be prolonged, the returned material ratio of the fertilizer is increased, the fertilizer is repeatedly granulated, burnt and carbonized, and the solubility of the fertilizer is reduced or even is not dissolved are solved. In addition, compressed air is adopted to spray atomized material feeding, micronized liquid drops are formed after spraying, compared with the traditional method that large liquid drops are formed after high-pressure steam feeding and spraying, the micronized liquid drops are easier to be coated and attached on fine bacteria residue particles to grow into particles, the micronized liquid drops are quick to dry and easy to grow into regular large particles, and therefore the problems that the number of irregular particles is increased, the amount of micro-powder is large and the material return ratio needs to be increased due to uneven spraying of the slurry are reduced at a granulation source.

10) The utility model discloses, the blanking mouth position that adopts the return pipe inlet pipe carries out dislocation set with atomizer to let the blanking mouth position of return pipe keep away from the hot-blast import of aircraft nose, compare in the arrangement mode near the central axis of traditional granulator's return pipe blanking mouth position and atomizer all concentrate on the granulator, the utility model discloses a hot-blast import is kept away from to return pipe blanking mouth, thereby can avoid earlier through the high temperature hot-blast fashioned tiny particle fertilizer of processing granulation get into the aircraft nose after, thereby be handled once more by aircraft nose high temperature hot-blast and lead to fertilizer granule burnt paste, the carbonization leads to insoluble problem.

11) Adopt multiple spot distributing type return material, to the blanking mouth design of return material pipe for the trapezoidal hopper of slit formula opening or bottom area sieve mesh, can let the return material pass through multiple spot, the multizone gets into the granulator with the material curtain mode, for single-point, single tube, concentrated return material, the single-point whitewashing feeding of traditional granulator, the utility model discloses can form multizone or subregion whitewashing coating return material granule surface, return material secondary granulation effect is better, and whitewashing is absorbed fast by the return material and lets feed liquid evenly distributed, coating on fertilizer granule surface, and return material secondary granulation efficiency is higher. In addition, multipoint guniting feeding can also be carried out on fertilizer particles in a granulation section between a granulator head and the middle section, and when the fertilizer particles are lifted by a shoveling plate to form a material curtain, the fertilizer particles can be coated by adjacent guniting atomized bacteria liquid, so that granulation is completed, and the fertilizer particles meeting the product specification are formed. In addition, when adopting many outer return material inlet pipes to arrange from the aircraft nose to dry section front and back and carry out the return material, can also realize that the powder separates the feeding return material and granulate again with the aggregate, for example, the return material inlet pipe is close to the aircraft nose and arranges outside the powder, and the return material inlet pipe is kept away from the aircraft nose and arranges outside the aggregate to realize the return material that becomes more meticulous, cooperate multiple spot distributing type spraying atomization again, avoid the too big and increase return material ratio of aggregate excess coating fungus liquid particle size and fertilizer to granulate repeatedly and lead to the problem that the solubility performance descends.

12) According to the utility model discloses the organic fertilizer product that obtains has following characteristics:

(1) pure grain biological fermentation, mushroom dreg mycoprotein, complete nutrients, easy absorption, high utilization rate and lasting fertilizer efficiency;

(2) the organic matter content is high, and the effects of improving the soil aggregate structure, fertilizing the soil fertility and adjusting the soil pH value are obvious;

(3) the fertilizer has high amino acid content, quick fertilizer efficiency, stress resistance, drought resistance and continuous cropping resistance, stimulates the growth of root systems, and improves the yield and the quality of crops;

(4) spraying slurry and granulating, the water content is low;

(5) is suitable for crops such as vegetables, fruit trees, grains and the like, and can flexibly adopt fertilization methods such as broadcast application, strip application or hole application and the like.

Drawings

FIG. 1 is a schematic view of an external slurry-spraying granulator with a return pipe of the present invention;

FIG. 2 is a schematic view of another external slurry-spraying pelletizer with a return pipe of the present invention;

FIG. 3 is a schematic view of a stepped cone structure of the present invention;

FIG. 4 is a schematic view of another stepped cone structure of the present invention;

FIG. 5 is a schematic view of a third grading cone structure of the present invention;

FIG. 6 is a left side view of the stepped cone structure of FIG. 3;

FIG. 7 is a left side view of the stepped cone structure of FIG. 4;

FIG. 8 is a left side view of the stepped cone structure of FIG. 5;

fig. 9 is a schematic view of the structure of the outer return material feeding pipe blanking port of the present invention;

fig. 10 is a schematic view of another structure of the outer return material feeding pipe blanking opening of the present invention;

FIG. 11 is a schematic view of a spray gun and multi-nozzle mounting structure of the present invention;

FIG. 12 is a schematic view of another spray gun and multi-nozzle mounting arrangement according to the present invention;

FIG. 13 is a schematic view of a process and a system for air atomization, slurry spraying and granulation of the present invention;

FIG. 14 is a schematic view of an air atomization, guniting, granulation, and waste gas treatment system of the present invention;

fig. 15 is a schematic view of a process and a system for air atomization, slurry spraying and granulation of the present invention.

In the figure:

a granulator cylinder 1; a feeding box 2; a discharging box 3; a grading cone 10; a draft tube 11; a vibrating device 12; an inner return spiral tube 13; a retainer ring 14; a material guide plate 15; a shovelling plate 16; a second outer return pipe 17; a first outer return pipe 18; a feed tank 21; a spray gun 22; a hot air inlet 23; a discharge box 31; a discharge bin outlet 33; a tail gas suction port 34; grading the slope 101; a through-hole 102; an annular retainer ring 103; a classifying cone screen 104; a graded slope aperture 105; a grading cone 106; a draft tube wall 111; a second outer return pipe blanking port 171; a branch return pipe 172; a first outer return pipe inlet 181; a first outer return pipe outlet 182; a branch pipe 221; and a nozzle 222.

Detailed Description

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the embodiments will be briefly described below. It is obvious that the drawings in the following description are only some embodiments of the invention, and that for a person skilled in the art, other drawings can be derived from them without inventive effort.

In describing embodiments of the present invention, the terms "longitudinal," "lateral," "up," "down," "front," "back," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and other terms are used in an orientation or positional relationship shown in the associated drawings for convenience in describing the invention and for simplicity in description, and are not intended to indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and are not to be construed as limiting the invention.

The present invention will be described in detail with reference to the accompanying drawings and specific embodiments, which are not repeated herein, but the present invention is not limited to the following embodiments.

Embodiment mode 1

Fig. 1 is a schematic diagram of an external slurry-returning pipe slurry-spraying granulator, fig. 3 is a schematic diagram of a grading cone structure according to this embodiment, fig. 6 is a left view of a grading cone structure of this embodiment, fig. 9 is a schematic diagram of an external slurry-returning inlet pipe blanking opening installation structure of this embodiment, fig. 11 is a schematic diagram of a spray gun and a multi-nozzle installation structure of this embodiment, fig. 13 is a schematic diagram of an air atomization slurry-spraying granulation process flow and system, fig. 14 the utility model discloses an air atomization slurry-spraying granulation tail gas treatment system.

Guniting granulator with external material returning pipe and internal material returning system

As shown in fig. 1, the external return pipe includes a first external return pipe 18, the first external return pipe 18 includes a first external return pipe inlet 181 and a first external return pipe outlet 182, the first external return pipe 18 is spirally installed on the outer wall of the tail section of the barrel 1 of the guniting granulator, the first external return pipe inlet 181 is communicated with the barrel of the tail section of the granulator, and the first external return pipe outlet 182 is communicated with the barrel of the drying section of the granulator.

As shown in fig. 1, the guniting granulator comprises a guniting granulator cylinder 1, a feed box 2 at the head and a discharge box 3 at the tail. A grading cone 10 is arranged between the drying section and the tail of the cylinder 1 of the guniting granulator, an inner material return spiral pipe 13 is arranged at the drying section of the cylinder 1 of the guniting granulator, a check ring 14 is arranged at the middle section of the drying section of the cylinder 1 of the guniting granulator, a material guide plate 15 is arranged inside the head of the guniting granulator, and a shoveling plate 16 is arranged at the drying section of the cylinder 1 of the guniting granulator.

As shown in fig. 1, the feeding box 2 is a disc-shaped feeding box 21, which is sleeved on the head of the barrel 1 of the guniting granulator, a hot air inlet 23 is arranged below the feeding box 21, which can convey hot air for drying materials into the barrel 1 of the guniting granulator, a second external material returning pipe 17 is arranged above the feeding box 21, which can convey fine-particle materials to be re-granulated, which are obtained by crushing and screening large-particle materials coming out from the guniting granulator, into the barrel 1 of the guniting granulator. The spray gun 22 enters the head of the cylinder 1 of the direct-connection spraying granulator from the center of the left side of the feeding box 21, and fertilizer slurry to be granulated is atomized and sprayed into the head of the cylinder 1 of the spraying granulator through compressed air arranged on a pipeline of the spray gun 22.

As shown in fig. 1, the discharging box 3 at the tail is a disc-shaped discharging box 31, which is sleeved at the tail of the barrel 1 of the guniting granulator, a discharging box outlet 33 is arranged below the discharging box 31 for discharging fertilizer granules for granulation, and a tail gas suction port 34 is arranged above the discharging box 31 for sucking waste gas generated in the drying process of the granulator.

As shown in fig. 3, the classifying cone 10 is a hollow cylinder with two open ends and smooth inner wall. The grading cone 10 comprises a cone 106 and a guide shell 11, wherein the cone 106 is a hollow cylinder with two open ends and smooth inner wall, and the guide shell 11 is communicated with the small-diameter open end of the cone 106. The guide cylinder 11 passes through the tail of the cylinder body 1 of the guniting granulator and is communicated with the discharging box 3.

As shown in fig. 1, the classifying cone 10 and the inner wall of the tail cylinder of the guniting granulator cylinder 1 enclose to form a cavity, and the first outer return pipe inlet 181 is arranged on the inner wall of the cavity, preferably on the end side wall of the cavity of the tail. The outlet 182 of the first outer return pipe penetrates through the inner wall of the drying section of the cylinder 1 of the guniting granulator and is communicated with the inlet end of the inner return spiral pipe 13. The first outer return pipe 18 is spirally arranged on the outer wall of the tail of the guniting granulator cylinder 1.

As shown in fig. 3, a grading cone screen 104 (not shown in the figure) is disposed on a grading slope 101 of the grading cone 10, an annular retainer 103 is disposed at a connection position of a cone 106 of the grading cone 10 and the guide shell 11, the grading cone 10 is communicated with the guide shell 11 through a through hole 102, and a vibration device 12 is disposed on an outer wall surface of the grading slope 101 of the grading cone 10. The inner material returning spiral pipe 13 is arranged on the inner wall of the barrel body 1 of the guniting granulator in an inner spiral mode, and small-particle materials at the tail of the granulator are collected from an inlet of the inner material returning spiral pipe and then return to the machine head to flow out from an outlet of the inner material returning spiral pipe, so that granulation is performed again. An outer material returning system is formed by the combination of the first outer material returning pipe 18, the grading cone 10 and the inner material returning spiral pipe 13, so that the processes of material screening, unqualified small-particle material collection and outer material returning re-granulation in the granulation process are completed. Because the tail at guniting granulator barrel 1 sets up the outer return material system that contains first outer return material pipe 18, can the traditional large granule material that flows out from draft tube 11 of greatly reduced carry out the outside after ejection of compact case 3 and smash, sieve, promote, the material quantity of the outer return material pipe 17 return material of second, consequently, can alleviate the work load of traditional outer return material system greatly, close the outer return material pipe 17 of second even, saved the high dust that leads to because of traditional outer return material, high energy consumption problem.

In addition, the entry end of interior returning charge spiral pipe 13 sets up the filter screen and has still avoided directly setting up returning charge spiral returning charge in traditional opening type in hierarchical awl bottom, and large granule fertilizer returns the aircraft nose through setting up the interior returning charge spiral in hierarchical awl bottom to lead to super large granule fertilizer to generate, the condition of worsening the solubility of fertilizer takes place. In order to prevent the mesh of the filter screen from being blocked and reduce the function of the internal material returning spiral, a knocking device similar to the vibrating device 12 arranged on the outer wall surface of the grading slope surface 101 of the grading cone 10 is arranged on the surface, opposite to the feeding direction, in the filter screen, when a rotary drum of the granulator rotates, the filter screen is hit periodically, fertilizer particles adhered to the meshes are removed in time through vibration, and the filter screen is ensured to be smooth.

As shown in fig. 3, an annular retaining ring 103 is disposed at a joint of the guide shell 11 and the cone 106, and the guide shell 11 and the cone 106 are hollow cylinders asymmetric with respect to the annular retaining ring 103. In this embodiment, a plurality of vibration hammer vibration devices 12 are symmetrically disposed on the outer wall surface of the cone 106, each vibration hammer is an arc-shaped circular tube with one closed end and contains an iron ball body, and the arc-shaped circular tube is welded to the outer wall surface of the cone 106. In the present embodiment, the vibrohammer vibration device 12 is provided on the outer wall surface of the graded slope diaphragm 105.

As shown in fig. 6, four divided classifying cone screens 104 are uniformly and symmetrically arranged on the classifying slope surface 101 of the classifying cone 10, the classifying cone screens 104 are trapezoidal screens with the width of 50cm, and the classifying slope surface aperture 105 is arranged in the middle of the trapezoidal screens. Wherein, each section of grading cone screen cloth 104 extends from the grading slope 101 near the small diameter opening end of the cone 106 to the large diameter opening end of the cone 106, the grading cone screen cloth 104 has meshes for the small-size material particles to fall out, the diameter of the meshes is determined according to the granulation diameter of the guniting granulator, and in the embodiment, the diameter of the meshes is 0.8 times of the granulation diameter. In this embodiment, the classifying cone screen 104 is integrally formed with the classifying slope 101 of the classifying cone 10, that is, the classifying cone screen 104 is formed by directly drilling the classifying slope 101.

As shown in figure 3, when the grading cone 10 rotates along with the granulator, the ball bodies filled with iron balls in the vibrating device 12 which rotates to the highest point fall under the action of gravity, the outer wall surface of the grading slope diaphragm 105 is knocked, and the vibration formed by knocking forms impact on the grading cone screen 104, so that material particles clamped on the meshes of the grading cone screen 104 can be removed through the impact formed by vibration, small-particle materials fall out of the grading cone screen 104, and the materials entering the tail of the granulator return to the drying section of the granulator through the first outer return pipe 18 for re-granulation. Adopt the utility model discloses a hierarchical awl screen cloth 104 structure that multistage distributes can set up a plurality of vibrohammers vibrating device 12 on hierarchical domatic light ring 105's outer wall, strikes hierarchical domatic light ring 105's outer wall rather than directly strike hierarchical awl screen cloth 104 because of the vibration, can avoid leading to hierarchical awl screen cloth 104 to warp because of directly striking for a long time.

As shown in fig. 9, after the second outer return pipe 17 enters the head of the pelletizer, it extends to the tail of the pelletizer, the second outer return pipe blanking port 171 is disposed near the inner wall of the head cylinder of the pelletizer 1, the second outer return pipe blanking port 171 is a trapezoidal hopper with a screen hole at the bottom, and other ways, such as slit type opening, can also be adopted, the purpose of this design is to let the outer return material enter the pelletizer in the form of material curtain, so that the sprayed and atomized bacteria liquid is uniformly coated on the surface of the return material particles, and the pelletization is completed. An air hammer (not shown) is arranged on the second outer return pipe 17 outside the granulator head, the second outer return pipe 17 is vibrated at intervals, preferably, the interval is 1-5 minutes/time, and the air hammer arranged on the second outer return pipe 17 can prevent the blanking port of the second outer return pipe 17 from being blocked due to the fact that the blanking speed is reduced when the feeding is set to be in a material curtain mode.

As shown in fig. 11, the multipoint distribution type guniting atomization is adopted, which comprises that 3 nozzles are arranged for guniting atomization. In this embodiment, the spray gun 22 includes barrel and nozzle 222, and nozzle 222 is the atomizer, and the barrel includes material pipe, trachea, blending bunker, and nozzle 222 is located the front end of barrel blending bunker, and material pipe and trachea constitute double-deck sleeve pipe, and double-deck sheathed tube inner tube is for expecting the pipe, and double-deck sheathed tube outer tube is the trachea, trachea and air compressor intercommunication, and the blending bunker is located double-deck sheathed tube anterior segment, and its tip and trachea and material pipe intercommunication.

As shown in fig. 11, 3 branch pipes 221 are provided at the tip of the lance tube of the lance 22, and 3 nozzles are provided at the ends of the branch pipes 221, respectively, and in the present embodiment, the branch pipes 221 are provided on one circumferential surface, and more preferably, the branch pipes 221 are provided on one circumferential surface at equal intervals of 120 °.

As shown in fig. 11, in the present embodiment, the second outer return pipe 17 is disposed in a shifted manner from the lance 22, the lance 22 has a barrel on the center axis of the barrel in the head portion of the pelletizer 1, and the three nozzles 222 are disposed around the center axis of the barrel through the branch pipe 221 in a shifted manner from the second outer return pipe drop port 171 of the second outer return pipe 17. As shown in fig. 11, the nozzle 222 is closer to the head of the pelletizer 1 than the second outer return pipe blanking port 171. Such a design can ensure that the atomized slurry sprayed from the nozzle 222 can be fully absorbed by the material curtain entering the granulator 1 from the second outer return pipe blanking port 171, and the micro-particles of the organic fertilizer are rapidly coated and formed, namely, the granulation of the granulating section of the machine head is completed.

Air atomization guniting granulation system comprising external return pipe and guniting granulator with external return system

As shown in fig. 13, an organic fertilizer air atomization, slurry spraying and granulation system comprises a bacteria residue storage tank, a bacteria residue conveying pipeline, a slurry spraying and granulation machine, a compressed air spray gun (not shown in the figure), an air draft pipeline (indicated by connecting arrows between the tail of the granulation machine and a chimney), an induced draft fan, an exhaust gas treatment system and a chimney. Wherein, the fungus sediment storage tank passes through fungus sediment pipeline and links to each other with whitewashing granulator aircraft nose, and the pipeline end-to-end connection that the fungus sediment pipeline connects the granulator has the compressed air spray gun, and outside air compressor provides the whitewashing power of air atomization for the compressed air spray gun and carries out whitewashing atomizing granulation, and the spray gun setting is in the aircraft nose position feeding box of granulator barrel. A second external return pipe (namely, a calcium oxide arrow in fig. 13) is arranged in the feeding box body of the granulator, and calcium oxide to be added can be conveyed to the head part of the barrel body of the guniting granulator, so that the potential problem of sulfur dioxide caused by hot air supplied to the granulator by a coal-fired boiler is solved. And discharging the qualified granulated fertilizer prepared by the granulator from the tail of the granulator, and feeding the fertilizer into a subsequent packaging line to finish the production of the organic fertilizer.

In this embodiment, the granulator is provided with an external screening and returning system, and the external screening and returning system returns the material from the tail of the granulator to the head and/or the middle drying section. The external screening and returning system comprises an external returning pipe, the external returning pipe comprises a first external returning pipe, a first external returning pipe inlet and a first external returning pipe outlet, and the first external returning pipe is externally and spirally mounted on the outer wall of the cylinder body of the guniting granulator; a grading cone is arranged between the drying section and the tail of the barrel of the guniting granulator and comprises a cone body and a guide cylinder, the cone body is a hollow barrel body with two open ends and smooth inner wall, the guide cylinder is communicated with the small-diameter open end of the cone body, and a grading cone screen is arranged on the grading slope surface of the cone body; the inlet of the first outer return pipe is communicated with the tail and a cavity formed by enclosing the grading cone, and the outlet of the first outer return pipe is communicated with the drying section cylinder of the granulator.

In this embodiment, be provided with the interior returning charge spiral pipe that extends to the granulator aircraft nose from the granulator tail in the granulator barrel, first outer return pipe export and interior returning charge spiral pipe intercommunication. The inlet end of the inner material returning spiral pipe is arranged between the drying section and the tail section of the granulator barrel, the inlet end of the inner material returning spiral pipe is provided with a filter screen with the same diameter as the meshes of the grading cone screen, and the outlet of the first outer material returning pipe is communicated with the inlet end of the inner material returning spiral pipe. The mesh diameter of the grading cone screen is 0.8 times of the fertilizer granulation diameter. In order to facilitate the processing, in the embodiment, the grading cone screen and the cone are integrally formed, and the grading cone screen is formed by directly drilling distribution holes on the grading slope surface. Because set up the screen cloth of grading awl on the grading awl, can sieve out the tiny particle fertilizer of tail along with the rotation of barrel naturally to return granulator drying section granulation again through first outer return pipe.

In addition, granulator tail communicates exhaust-gas treatment system, draught fan and chimney through induced air pipeline in proper order, in this embodiment, provides little negative pressure operation environment for fertilizer air atomization whitewashing granulation system by the draught fan to extract dust and the smell that produces in the atomization whitewashing granulation process, and concentrate to exhaust-gas treatment system in through the induced air pipeline and administer.

As shown in fig. 14, the utility model discloses an air atomizing whitewashing granulator's exhaust-gas treatment system, include cyclone, spray column, wet-type electrostatic precipitator, condenser, low temperature plasma equipment through the induced air pipeline order intercommunication. The induced draft fan provides the negative pressure for the exhaust-gas treatment system to the pump drainage whitewashing granulator is at the waste gas that the granulation in-process produced, and the induced draft fan is the frequency conversion induced draft fan, the power of induced draft fan is 315kw, and the pressure of induced draft fan is 0.7-0.75 MPa.

The spray tower is a spiral-flow industrial waste gas spray tower, in the embodiment, two stages of spray towers connected in series are adopted to spray, remove dust and remove odor of waste gas generated by granulation, and spray liquid enters the spray tower from the upper part, the middle part and the lower part of the tower body of the spray tower in the height direction to spray the waste gas. The spray liquid is water, the pressure of the spray liquid is 0.2-0.4MPa, and the spray liquid is replaced every 4 hours. Under the operating conditions of treating the bacterial pulp for about 12 square meters per hour and producing finished products for about 2 tons per hour, the wet electric precipitation has the dust collection area of 1496.5 square meters, the air speed of 1.98m/s, the heat exchange area of a condenser of 2480 square meters, the low-temperature plasma requires the air inlet temperature of less than 50 ℃, and the odor concentration of 50mg/m³And the removal efficiency is 80 percent. The dust pollution is eliminated in the production field, andodor and waste water are discharged, and zero discharge of pollutants is realized.

The utility model discloses in, owing to adopt the spray column to replace the venturi to remove dust, increased exhaust gas channel's transverse cutting area, realized reducing the windage and ensured that whole granulation system is little negative pressure and forms and the operation is stable, consequently, the system energy consumption obviously descends, the system operation is also more stable. Meanwhile, the waste gas after washing is demisted during dust removal, so that the operation of a subsequent demisting device is facilitated.

Method for preparing instant organic fertilizer by utilizing organic fertilizer air atomization spraying granulation system in embodiment 1

The utility model provides an organic fertilizer air atomization guniting granulation method, contains following step:

step one, steam with the temperature of 100 ℃ is introduced into a penicillin fermentation bacteria residue storage tank, the bacteria residue is heated and inactivated for 2 hours at the temperature of 80 ℃ under stirring, and the fermentation bacteria residue is melted into bacteria residue liquid containing 15-30% of water-soluble organic matters.

Step two, starting an air heater to blow 600-650 ℃ hot air to the head of the guniting granulator, opening a spray gun for connecting the bacteria residue storage tank and the guniting granulator, and atomizing and guniting the bacteria residue liquid at the head of the guniting granulator through compressed air by adopting a multipoint distributed guniting atomizing nozzle to obtain atomized bacteria liquid; the compressed air temperature is 80 deg.C and the pressure is 0.6 Mpa.

And step three, moving the fertilizer particles from the head to the tail of the guniting granulator, growing in hot air, drying to form a fertilizer product, and discharging from the tail, wherein the tail gas temperature of the tail is 75 ℃. In the granulation process, part of particles need to be separated out because of being small and return to the granulator for re-granulation, therefore, an external screening and returning system is arranged on the guniting granulator, fertilizer with small particles is screened out from the tail of the granulator through a screen on a grading cone of the external screening and returning system, and the fertilizer directly returns to the internal returning spiral pipe through the internal spiral of the first external returning pipe to return to the head for re-granulation; in addition, when a coal-fired boiler is adopted to provide hot air for the granulator, in order to eliminate the influence of sulfur in the coal, the fertilizer can be prepared according to the content of calcium oxide in the fertilizer which is less than or equal to 2 wt% through a second external return pipe arranged on the machine head, mixed with fertilizer powder and injected into a slurry-spraying granulator, and when the machine head is contacted with atomized bacteria liquid entering from a spray gun for granulation to obtain fertilizer particles, the calcium oxide is combined with sulfur dioxide in the hot air to eliminate the influence of the sulfur on the environment.

And step four, starting an induced draft fan connected with the tail of the granulator, sucking the waste gas discharged from the tail of the granulator into a waste gas treatment system, firstly entering a cyclone separator for dedusting and separating and recovering part of fine-grained fertilizer, then entering from the bottom of a two-stage spiral-flow industrial waste gas spray tower, and enabling spray liquid to enter the spray tower from the upper part, the middle part and the lower part of the spray tower body in the height direction to wash, remove dust, remove odor and demist and then evacuate the waste gas. In the utility model, the spraying liquid is water, and the pressure of the spraying liquid is 0.2-0.4 MPa.

The instant organic fertilizer prepared by the preparation method treats the bacterial pulp about 12 square per hour, the finished product is about 2 tons per hour, and the organic fertilizer comprises the following components in percentage by mass: organic matter is more than or equal to 90 percent, and total nitrogen, water-soluble phosphorus and water-soluble potassium are more than or equal to 12 percent. Wherein the total nitrogen is 8 percent, and P is used₂O₅Calculated water-soluble phosphorus is 3% in K₂The water soluble potassium calculated as O is 1%. In order to solve the problem of sulfur dioxide in hot air caused by supplying hot air to a granulator by adopting a coal-fired boiler, calcium oxide with the mass percent of less than or equal to 2 wt% is added into a fertilizer product.

Working principle of air atomization spraying granulation system comprising external return pipe and external return system spraying granulation machine

As shown in fig. 1, a guniting granulator cylinder 1 with a middle drying section diameter of 4.25 meters and a length of 16 meters rotates under the action of an external gear traditional system (not shown in fig. 1), the rotating speed is 6 circles per minute, and the inclination angle of the guniting granulator cylinder and the horizontal plane is 3 degrees. Spraying atomized fertilizer slurry containing bacterial residues into the guniting granulator from a spray gun 22 arranged at the head of the guniting granulator barrel 1, wherein 650-degree hot air enters the head from a hot air inlet 23 arranged below a feeding box body 21 at the head of the guniting granulator barrel 1, passes through a hot air distribution plate (not shown in figure 1) in the feeding box body 21 and then dries the atomized fertilizer slurry. Under the action of hot air, atomized fertilizer slurry quickly forms micro-spherical granular fertilizer, meanwhile, bacterial liquid is quickly attached to the outer layer of the micro-spherical granular fertilizer to gradually grow up, quickly dehydrate and dry to form small granular fertilizer to fall down, in the process of moving from a head to a tail in a rotary spraying granulator barrel 1, on one hand, a material curtain lifted up by a guide plate 15 and a shoveling plate 16 arranged in the spraying granulator barrel 1 continuously absorbs new fertilizer bacterial slag to continuously grow up, on the other hand, the small granular fertilizer is lifted up to form the material curtain under the action of the shoveling plate 16 in the spraying granulator barrel 1, the material curtain is continuously dehydrated and dried by hot air, the dried fertilizer granules enter a grading cone 10 at the tail, when passing through meshes of a grading cone screen 104 arranged on a grading slope 101 of the grading cone 10, the small granular fertilizer falls out of the grading cone 10 to enter a cavity formed by the surrounding of the tail and the grading cone 10, and then enters a first outer return pipe 18 through a first outer return pipe inlet 181 arranged on the inner wall of the cavity, returning to the inner return spiral pipe 13 of the drying section of the granulator again through the first outer return pipe outlet 182, and returning the fertilizer particles to the machine head for re-granulation by the inner return spiral pipe 13 under the rotation of the cylinder 1 of the guniting granulator, thereby completing the processes of guniting granulation, screening and separating small granular fertilizer from the grading cone 10 at the tail of the machine, returning to the machine head again through the outer return pipe and the inner return spiral pipe for continuous granulation.

In this embodiment, because the outer material returning system of the first outer material returning pipe 18 of the grading cone 10 including the grading cone screen 104, the inner material returning spiral pipe 13, and the inner material returning spiral pipe 13 communicating the tail of the granulator and the drying section is designed, the tail of the small particle fertilizer is automatically screened and separated in the spraying granulator barrel 1, the first outer material returning pipe spirally collects the inner granulation circulation of the small particle material automatically returned to the drying section, the inner granulation circulation utilizes the spiral arrangement of the first outer material returning pipe 18 and the inner material returning spiral pipe 13, the effects of crushing, screening, lifting and returning the outer circulation material of the traditional granulator are realized under the condition of not adding an external power facility, and the operations of screening and crushing large particle materials and lifting the outer material returning are reduced, so that the environment is protected and the energy is saved.

In this embodiment, owing to set up the utility model discloses an outer returning charge system and the mixed returning charge mode that combines with interior returning charge spiral pipe, can exert traditional interior returning charge simple, need not advantages such as extra increase energy consumption, when can solving interior returning charge spiral pipe entry end again and set up the filter screen, the returning charge volume reduces, the problem that the returning charge efficiency descends.

In the present embodiment, the second outer return pipe 17 is disposed offset from the compressed air spray gun 22, preferably with the head of the spray gun 22 located on the central axis of the barrel of the head portion of the pelletizer 1, the head of the second outer return pipe 17 is disposed near the inner wall of the barrel of the head portion of the pelletizer 1, and the head of the spray gun 22 is closer to the head of the pelletizer 1 than the head of the second outer return pipe 17. Such design can guarantee from the atomized slurry that spray gun 22 head was spouted, can be fully absorbed by the material curtain that gets into granulator 1 aircraft nose from second outer return pipe 17, and under the hot-blast effect of 650 of aircraft nose, the quick dehydration forms certain humidity micro granule organic fertilizer, accomplish the preliminary granulation of fertilizer of aircraft nose promptly, the in-process that micro granule organic fertilizer with certain humidity shifts from the aircraft nose to the tail, be raised by the shoveling plate and form the material curtain, on the one hand, the collision fuses to grow up and form granular fertilizer between the micro granule, on the other hand, granular fertilizer material curtain is raised, under the negative pressure suction effect of draught fan, the hot-blast of taking the aircraft nose position continuously sweeps granular fertilizer material curtain, continue dry fertilizer granule.

In addition, in this embodiment, granulator tail communicates exhaust-gas treatment system, draught fan and chimney through the induced air pipeline in proper order, the draught fan provides little negative pressure operating environment for fertilizer air atomizing guniting granulation system, dust and smell that the negative pressure suction produced at atomizing guniting granulation in-process, and manage in concentrating to exhaust-gas treatment system through the induced air pipeline, replace venturi dust collecting equipment for the whirl spray tower, can increase the transverse cutting area of exhaust-gas passageway, reduce the windage, dust removal defogging simultaneously, therefore, granulation system energy consumption obviously descends, system operation is also more stable.

Embodiment mode 2

Fig. 2 is a schematic view of another external slurry-spraying granulator with a return pipe, fig. 4 is a schematic view of a grading cone structure according to embodiment 2 of the present invention, fig. 7 is a left view of a grading cone structure in fig. 4, fig. 10 is a schematic view of an outer material-returning inlet pipe blanking opening installation structure according to this embodiment, fig. 12 is a schematic view of a spray gun and multi-nozzle installation structure according to this embodiment, and fig. 15 is a schematic view of an air atomization slurry-spraying granulation process and system according to embodiment 2 of the present invention. Compared with embodiment 1, the present embodiment is mainly different in that: (1) the external material returning pipe, the external material returning system and the grading cone adopted by the guniting granulator are different in structure; the blanking ports of the second outer return pipe have different structures, and the multi-nozzle structure and arrangement of the spray gun are different; (2) the granulator is not provided with an inner material returning spiral pipe; (3) the process flow is different from the structure of a granulation system, and the granulated fertilizer discharged from the tail of the granulator is also provided with a lifter, a sieving machine, a pulverizer and an external return pipe before entering a packaging line.

Guniting granulator and air atomization guniting granulation system of full-external return pipe and external return system

As shown in fig. 2, the external return pipe includes a first external return pipe 18, the first external return pipe 18 includes a first external return pipe inlet 181 and a first external return pipe outlet 182, the first external return pipe 18 is spirally installed on the outer wall of the tail section of the barrel 1 of the guniting granulator, the first external return pipe inlet 181 is communicated with the barrel of the tail section of the granulator, and the first external return pipe outlet 182 is communicated with the barrel of the drying section of the head of the granulator. In order to solve the problem of heat preservation of materials returned to the machine head from the tail through the first outer return pipe, heat preservation cotton is wrapped outside the first outer return pipe 18.

As shown in fig. 2, the guniting granulator comprises a guniting granulator cylinder 1, a feed box 2 at the head and a discharge box 3 at the tail. A grading cone 10 is arranged between the drying section and the tail of the cylinder 1 of the guniting granulator, a check ring 14 is arranged at the middle section of the drying section of the cylinder 1 of the guniting granulator, a guide plate 15 is arranged in the head of the guniting granulator, and a shoveling plate 16 is arranged at the drying section of the cylinder 1 of the guniting granulator. In the present embodiment, the drying section of the cylindrical body 1 of the slurry-jet granulator is not provided with an internal return spiral pipe.

As shown in fig. 2, the feeding box 2 is a disc-shaped feeding box 21, which is sleeved on the head of the barrel 1 of the guniting granulator, a hot air inlet 23 is arranged below the feeding box 21, which can convey hot air for drying materials into the barrel 1 of the guniting granulator, a second external material returning pipe 17 is arranged above the feeding box 21, which can convey fine-particle materials to be re-granulated, which are obtained by crushing and screening large-particle materials coming out from the guniting granulator, into the barrel 1 of the guniting granulator. The spray gun 22 enters the head of the cylinder 1 of the direct-connection spraying granulator from the center of the left side of the feeding box 21, and fertilizer slurry to be granulated is sprayed into the head of the cylinder 1 of the spraying granulator through compressed air arranged on a pipeline of the spray gun 22.

As shown in fig. 2, the discharge box 3 of the guniting granulator comprises a discharge box body 31, the discharge box body 31 is sleeved on the tail of the guniting granulator barrel 1, the tail of the guniting granulator can rotate freely in the discharge box body 31, and a first outer material return pipe inlet 181 is arranged on the outer wall of the barrel at the connecting part of the guniting granulator and the discharge box body 31. The feeding box 2 comprises a feeding box body 21, the feeding box body 21 is sleeved on a machine head of the cylinder 1 of the guniting granulator, the machine head of the guniting granulator can freely rotate in the feeding box body 21, and a first outer return pipe outlet 182 is arranged on the outer wall of a cylinder at the connecting part of the guniting granulator and the feeding box body 21.

As shown in fig. 4, in the present embodiment, the classifying cone 10 is a hollow cylinder with both ends open and smooth inner wall. The grading cone 10 is arranged between the drying section and the tail of the granulator, the grading cone 10 comprises a cone 106 and a guide cylinder 11, the cone 106 is a hollow cylinder with two open ends and smooth inner wall, and the guide cylinder 11 is communicated with the small-diameter open end of the cone 106. An annular retainer ring 103 is arranged at the joint of the guide shell 11 and the cone 106, and the guide shell 11 and the cone 106 are hollow cylinders symmetrically arranged relative to the annular retainer ring 103.

As shown in fig. 7, the grading slope 101 of the grading cone 10 is used as a grading cone screen 104, and is uniformly distributed with meshes for small-sized material particles to fall, the diameter of the meshes is determined according to the granulation diameter of the guniting granulator, and in the embodiment, the diameter of the meshes is 0.9 times of the granulation diameter. In this embodiment, the classifying cone screen cloth 104 and the cone 10 are integrally formed, the classifying cone screen cloth 104 is composed of distributed holes on the classifying slope surface 101, in the manufacturing process, the integrally formed classifying cone 10 is firstly processed and manufactured, then, holes are drilled on the classifying slope surface 101 of the classifying cone 10 and are uniformly distributed on the classifying slope surface 101, so as to form the classifying cone screen cloth 104. According to the needs, the drilling holes can also be uniformly distributed on the large-diameter opening end of the grading slope surface 101 close to the cone 106, and the design can also ensure that when small-particle materials flow through the meshes of the grading cone screen 104 of the grading slope surface 101, the small-particle materials can fall out of the grading cone screen 104 through the meshes, and the materials entering the tail of the granulator are returned to the head of the granulator through the first outer return pipe 18 for re-granulation.

As shown in fig. 4, two chain-type vibration devices 12 are symmetrically arranged on the outer wall surface of the cone 106, the vibration devices 12 are arranged on the classifying cone screen 104, when the classifying cone 10 rotates along with the granulator, the two chain-type vibration devices 12 fall under the action of gravity and hit the classifying cone screen 104 by inertia swing, so that material particles stuck on the meshes of the classifying cone screen 104 can be removed by hitting, small-particle materials fall out of the classifying cone screen 104, and the materials entering the tail of the granulator are returned to the head through the first outer return pipe 18 for re-granulation.

In this embodiment, the outer return system includes a first outer return pipe 18, a second outer return pipe 17, and a sizing cone 10. In this embodiment, the drying section of the cylindrical body 1 of the guniting granulator is not provided with an inner return spiral pipe.

In this embodiment, the material forms material particles of different sizes after passing through the granulator granulation, get into the grading cone 10 of granulator tail, along with the granulator rotation, the material particles stratify naturally because of the particle size difference, the material of small granule is sieved and falls into on the domatic 101 of grading cone 10, after being sieved by the mesh of grading cone screen cloth 104, fall out grading cone 10 and get into the tail and the cavity that the grading cone 10 encloses and closes and form, and directly return to the granulator aircraft nose through first outer return pipe 18, material and the material of large granule accord with particle size, go into draft tube 11 behind the annular retaining ring 103 that cone 106 and draft tube 11 combination position set up through grading cone 10, get into subsequent material packing, thereby the classification of the unqualified material after having realized the guniting drying. In this embodiment, because the material returning spiral pipe in the dry section of whitewashing granulator barrel 1 does not install, therefore, the inner space of the dry section of whitewashing granulator barrel 1 strengthens, can increase the capacity of material, still can increase 10% flight quantity, therefore, under the prerequisite of guaranteeing product quality, the utility model discloses can improve the material in the unit interval inner tube and remove and dry speed, promote the productivity of granulator.

Due to the arrangement of the grading cone screen 104, the effect of screening the fertilizer at the tail of the granulator is achieved, the returning amount of small particles is increased, and the treatment capacity of fertilizer particles coming out from the tail and entering a subsequent external crushing, screening, lifting and returning device is reduced.

Traditional granulator adopts the inside feed return spiral pipe to adhere to the cylinder inner wall, crowds and accounts for flight mounted position, has reduced flight quantity to the speed that the fertilizer granule that has reduced the back of the granulation produced removed from the aircraft nose to the tail has also reduced drying efficiency. Owing to cancelled interior returning charge, adopted the utility model discloses a complete external return material pipe and outer return material system, in addition, adopted the utility model discloses a hierarchical awl screen cloth 104 design, the return material volume is compared under the same circumstances in the obvious increase of traditional granulator, consequently, the utility model discloses can widen external return material pipe, perhaps set up the external return material pipe of 2 and above quantity to satisfy the return material flow needs.

After the return pipe is externally arranged on the granulator drum, an original gear ring (not shown in fig. 2) on the outer wall of the drum for pushing the granulator drum to rotate is smaller, and the gear ring with the larger diameter needs to be replaced, so that the external return pipe can penetrate through the gear ring along the outer wall of the drum to reach the handpiece.

As shown in fig. 10, the second outer return pipe 17 extends to the tail of the pelletizer after entering the head of the pelletizer, the blanking port 171 of the second outer return pipe is arranged near the inner wall of the barrel at the head of the pelletizer 1 and is divided into three branch return pipes 172, the branch return pipes 172 are arranged on a circumferential surface and are arranged symmetrically left, middle and right with the central axis of the barrel of the pelletizer, or 3 branch return pipes 172 are arranged at intervals of 30-50 cm from the head to the drying section. The blanking port 171 of the second outer return pipe is a slit-type opening, and the purpose of the design is to allow the outer return pipe to enter the granulator in a material curtain manner, so that the sprayed and atomized bacteria liquid is uniformly coated on the surfaces of the return particles to complete granulation.

As shown in fig. 12, the multipoint distribution type guniting atomization is adopted, which comprises that 3 nozzles are arranged for guniting atomization. In this embodiment, the spray gun 22 includes barrel and nozzle 222, and nozzle 222 is the atomizer, and the barrel includes material pipe, trachea, blending bunker, and nozzle 222 is located the front end of barrel blending bunker, and material pipe and trachea constitute double-deck sleeve pipe, and double-deck sheathed tube inner tube is for expecting the pipe, and double-deck sheathed tube outer tube is the trachea, trachea and air compressor intercommunication, and the blending bunker is located double-deck sheathed tube anterior segment, and its tip and trachea and material pipe intercommunication.

As shown in fig. 12, 3 branch pipes 221 are provided at the front end of the barrel of the lance 22, and 3 nozzles are respectively provided at the ends of the branch pipes 221, in the present embodiment, 3 branch pipes 221 are provided at intervals of 50cm on the barrel, and a nozzle 222 is provided at the end of each branch pipe 221, and the nozzle 222 performs slurry spraying and atomization toward the material curtain formed by the material returning curtain and the sheet forming plate of the granulation section.

In this embodiment, the second outer return pipe 17 is disposed in a staggered manner with respect to the spray gun 22, the gun tube of the spray gun 22 is located on the central axis of the cylinder in the head portion of the pelletizer 1, and the three spray nozzles 222 are disposed around the central axis of the cylinder through the branch pipe 221, and are disposed in a staggered manner with respect to the second outer return pipe blanking port 171 of the second outer return pipe 17. The nozzle 222 is closer to the head of the granulator 1 than the second outer return tube blanking port 171. Such a design can ensure that the atomized slurry sprayed from the nozzle 222 can be fully absorbed by the material curtain entering the granulator 1 from the second outer return pipe blanking port 171, and the micro-particles of the organic fertilizer are rapidly coated and formed, namely, the granulation of the granulating section of the machine head is completed.

Different from the embodiment 1, the organic fertilizer air atomization guniting granulation system of the embodiment comprises a bacteria residue storage tank, a bacteria residue conveying pipeline, a guniting granulator, a compressed air spray gun, an induced air pipeline, an induced draft fan, a waste gas treatment system and a chimney, wherein the tail of the guniting granulator is connected with a lifter, a screening machine and a crusher which are sequentially connected through a closed pipeline, a second external return pipe 17 is arranged on a head feeding box body 21, the second external return pipe can convey calcium oxide to be added into a guniting granulator barrel 1 and can also convey screened granular materials to be re-granulated and collected by an external return system, a discharge port of the second external return pipe 17 is arranged in the head of the granulator, the lifter is communicated with the tail of the granulator and is used for screening fertilizer granules discharged from the tail, wherein large-particle fertilizers enter the crusher to be crushed into small-particle fertilizers, and together with the small granular fertilizer screened by the screening machine, the fertilizer is conveyed to a second outer return pipe 17 through a closed pipeline and returns to the granulator again for granulation.

Organic fertilizer air atomization spraying granulation production method in embodiment

In this embodiment, the fermentation bacteria dregs are atomized and gunited by a compressed air spray gun, fertilizer particles with different sizes are formed after granulation in a granulator, the fertilizer particles enter a grading cone 10 at the tail of the granulator, the fertilizer particles are naturally layered due to different particle sizes along with the rotation of the granulator barrel, small-particle fertilizers are screened to fall on a grading slope 101 of the grading cone 10, the small-particle fertilizers are screened by meshes of a grading cone screen 104, the small-particle fertilizers fall out of the grading cone 10 to enter a first outer return pipe 18 and directly return to a machine head, the fertilizers and the large-particle fertilizers accord with the particle sizes, the small-particle fertilizers enter a guide cylinder 11 through an annular check ring 103 arranged at the combination part of a cone 106 of the grading cone 10 and the guide cylinder 11 and enter a subsequent fertilizer packaging line, and then the classification of unqualified fertilizer particles after drying of the guniting granulator is realized. Because the internal material returning spiral pipe is cancelled, the space can be released to increase the number of shoveling plates, thereby improving the speed of the fertilizer particles generated after granulation moving from the machine head to the machine tail and simultaneously improving the drying efficiency.

Due to the arrangement of the grading cone screen 104 and the arrangement of the meshes which are consistent with the screen of the grading cone screen 104 on the wall surface of the draft tube 11, the double and deep screening effect on the fertilizer particles at the tail of the granulator is achieved, the returning amount of small particles is increased, and the treatment amount of the fertilizer particles which come out from the tail and enter a subsequent screening device is reduced.

In this embodiment, the second outer feeding-back blanking opening 171 is disposed near the inner wall of the main body of the head of the pelletizer 1, and is divided into three branch feeding-back pipes 172, the branch feeding-back pipes 172 are arranged on a circumferential surface and are symmetrically arranged with the central axis of the main body of the pelletizer to the left, the middle and the right, or 3 branch feeding-back pipes 172 are arranged from the head to the drying section at an interval of 30-50 cm, and the second outer feeding-back blanking opening 171 is a slit-type opening, so that the feeding-back materials can enter the pelletizer in the form of material curtain. Meanwhile, multipoint distributed guniting atomization is adopted, namely 3 branch pipes 221 are communicated with each other at intervals of 50cm on a gun barrel of the spray gun, the tail ends of the branch pipes 221 are provided with nozzles 222, guniting atomization is carried out through the 3 nozzles, and the nozzles 222 carry out guniting atomization towards a material returning curtain and a material curtain formed by a shoveling plate of a granulation section. And (4) fully absorbing the atomized bacteria liquid by the material curtain, quickly coating and forming micro-particles of the organic fertilizer, namely completing granulation of the granulating section of the machine head.

In the embodiment, in order to screen out large-particle fertilizers and small-particle fertilizers mixed in qualified fertilizer products from fertilizer products discharged from the tail, the fertilizer products discharged from the tail are firstly conveyed to a screening machine through a hoisting machine and screened through the screening machine, wherein the large-particle fertilizers enter a grinding machine to be ground into small-particle fertilizers, and then are conveyed to an external material return feeding pipe arranged at a machine head through a closed pipeline to return to the granulating machine again to be granulated together with the small-particle fertilizers screened by the screening machine. On the basis of the embodiment 1, the embodiment adopts the all-external material returning system, so that the problem that the production efficiency of the granulator needs to be improved due to the fault of the granulating system of the embodiment 1, for example, when the internal material returning system is blocked, or the rotating speed of the granulator is increased, the retention time of materials is shortened and the like, and the fertilizer discharged from the tail of the granulator contains unqualified fertilizer particles, can be treated, and ensures the normal operation of production equipment. In addition, the material returning system is external, so that the failure of the material returning system is convenient to maintain, and the vibration device is arranged on the outer material returning pipeline, so that possible caking can be cleaned in time.

In this embodiment, the draught fan can also provide negative pressure operation environment for lifting machine, screening machine and rubbing crusher except providing the negative pressure for exhaust-gas treatment system to the exhaust-gas treatment system dust removal of the exhaust-gas treatment that the pump drainage whitewashing granulator granulation and outer feed back in-process produced removes the flavor, prevents that waste gas from leaking. The induced draft fan adopts the frequency conversion induced draft fan, the power of induced draft fan is 315kw, and the pressure of induced draft fan is 0.7-0.75 MPa.

Working principle of slurry spraying and granulating system with all-external return pipe and external return system

As shown in fig. 2, the barrel 1 of the guniting granulator rotates under the action of an external gear conventional system (not shown in fig. 2), slurry containing fertilizer is sprayed into the guniting granulator from a spray gun 22 arranged at the head of the barrel 1 of the guniting granulator, 650 ° hot air enters the head from a hot air inlet 23 arranged below a feeding box 21 at the head of the barrel 1 of the guniting granulator, and is dried by guniting bacteria liquid and returned material after passing through a hot air distribution plate (not shown in fig. 2) in the feeding box 21, material particles continuously absorb new bacteria liquid or powder to gradually grow in the process of moving from the head to the tail in the rotating guniting granulator barrel 1, on the other hand, the material particles are lifted by a shoveling plate 16 in the guniting granulator to form a material curtain and are dried gradually by hot air, the dried material particles enter a grading cone 10 at the tail, when the meshes of the screen mesh 104 of the grading cone are arranged on the grading slope 101 of the grading cone 10, small-particle fertilizer falls out of the grading cone 10 and enters a cavity formed by enclosing the tail and the grading cone 10, then enters the first outer return pipe 18 through a first outer return pipe inlet 181 arranged on the inner wall of the cavity, returns to the head of the granulator through an outer return spiral and is granulated again through a first outer return pipe outlet 182, and thus the processes of spraying granulation, screening and separating of the small-particle fertilizer from the grading cone 10 at the tail, returning to the head through the outer return pipe and continuing granulation are completed.

In this embodiment, on the outer wall of granulator barrel was arranged outward to first outer return pipe, the barrel inner wall was originally released by the space that interior return material spiral pipe occupied, and the flight can all be installed to vacant position to material stoving and removal efficiency have been improved greatly. The shovelling plate can be increased by 10 percent through calculation.

In addition, in this embodiment, granulator tail passes through the induced air pipeline and communicates exhaust-gas treatment system in proper order, draught fan and chimney, the draught fan provides little negative pressure operating environment for fertilizer air atomizing guniting granulation system, dust and smell that the negative pressure suction produced in atomizing guniting granulation process, and concentrate to exhaust-gas treatment system in through the induced air pipeline and administer, replace venturi dust collecting equipment for the spray column, can increase the crosscut area of exhaust-gas passageway, reduce the windage, the spray column can set up to single tower, also can set up to the many towers of establishing ties, therefore, granulation system energy consumption obviously descends, system operation is also more stable.

Embodiment 3

Fig. 5 is a schematic view of a stepped cone structure according to embodiment 3 of the present invention, and fig. 8 is a left side view of the stepped cone structure in fig. 5. Compared with the embodiment 2, the difference of the embodiment lies in that the adopted grading cone structure is different, and in addition, the granulator of the embodiment is provided with an inner return spiral pipe 13 distributed from the head to the tail.

External material returning pipe and spraying granulator structure of external material returning system

In this embodiment, the external return pipes include a first external return pipe 18, a first external return pipe inlet 181, and a first external return pipe outlet 182, the first external return pipe 18 is spirally installed on the outer wall of the tail section of the barrel 1 of the guniting granulator, the first external return pipe inlet 181 is communicated with the barrel of the tail section of the granulator, and the first external return pipe outlet 182 is communicated with the barrel of the drying section of the head of the granulator. In order to solve the problem of heat preservation of materials returned to the machine head from the tail through the first outer return pipe, heat preservation cotton is wrapped outside the first outer return pipe 18.

In this embodiment, the guniting granulator comprises a guniting granulator barrel 1, a feed box 2 located at the head, and a discharge box 3 located at the tail. A grading cone 10 is arranged between the drying section and the tail of the cylinder 1 of the guniting granulator, a check ring 14 is arranged at the middle section of the drying section of the cylinder 1 of the guniting granulator, a guide plate 15 is arranged in the head of the guniting granulator, and a shoveling plate 16 is arranged at the drying section of the cylinder 1 of the guniting granulator. In the present embodiment, an inner return spiral pipe extending from the head to the tail is attached to the drying section of the cylindrical body 1 of the guniting granulator.

As shown in fig. 5, the classifying cone 10 is a hollow cylinder with two open ends and smooth inner wall. The grading cone 10 is arranged between the drying section and the tail of the granulator, the grading cone 10 comprises a cone 106 and a guide cylinder 11, the cone 106 is a hollow cylinder with two open ends and smooth inner wall, and the guide cylinder 11 is communicated with the small-diameter open end of the cone 106. An annular retainer ring 103 is arranged at the joint of the guide shell 11 and the cone 106, and the guide shell 11 and the cone 106 are hollow straight cylinders which are asymmetric relative to the annular retainer ring 103.

As shown in fig. 8, two separate classifying cone screens 104 are arranged on the classifying slope 101 of the classifying cone 10, the classifying cone screens 104 are trapezoidal screen rings with a width of 10cm, and a classifying slope aperture 105 is arranged in the middle of each trapezoidal screen ring. Wherein, one section of grading cone screen cloth 104 is close to the grading slope 101 of the small diameter opening end of the cone 106, the other section of grading cone screen cloth 104 is distributed on the central inner wall of the grading slope 101 of the cone 106, the grading cone screen cloth 104 is provided with meshes for the falling of small-size material particles, the diameter of the meshes is determined according to the granulation diameter of the guniting granulator, and in the embodiment, the diameter of the meshes is 0.8 times of the granulation diameter.

In this embodiment, the classifying cone screen cloth 104 may be integrally formed with the cone 10, the classifying cone screen cloth 104 is formed by distributing holes on the classifying slope surface 101, in the manufacturing process, the integrally formed classifying cone 10 is firstly processed and manufactured, and then the classifying slope surface 101 of the classifying cone 10 is drilled to form the classifying cone screen cloth 104 with uniformly distributed meshes. The classifying cone screen cloth 104 can also be formed separately from the cone 106, for example, the classifying cone screen cloth 104 is separately processed into a trapezoidal screen ring with a width of 10cm, and then fixed on the classifying slope surface 101 of the cone 10 by welding or fastening.

As shown in fig. 5, a plurality of chain-type vibration devices 12 are symmetrically provided on the outer wall surface of the cone 106, and in the present embodiment, a stepped slope diaphragm 105 is provided between two stepped screen rings, so that the chain-type vibration devices 12 can be fixed to the stepped slope diaphragm 105. Because the trapezoidal screen ring of hierarchical awl screen cloth 104 sets up the multistage for the separation, the centre sets up hierarchical domatic light ring 105, be convenient for set up many places vibrating device 12 on hierarchical awl 10 outer wall, in time strike on the one hand and eliminate the jam of granule to hierarchical awl screen cloth 104 mesh, keep the unobstructed of hierarchical awl screen cloth 104, screening effect is good, on the other hand can utilize the domatic inclination of hierarchical domatic light ring 105 to the screening effect that large granule fertilizer itself has to the tiny particle fertilizer, let the tiny particle fertilizer gather to the bottom layer fast, thereby sieve smoothly from the hierarchical awl screen cloth of neighbouring. Thereby, be favorable to material granulation grading separation, improve the screening effect in grades.

In this embodiment, the outer return system includes a first outer return pipe 18, a second outer return pipe 17, and a sizing cone 10. Except the returning charge system, still including interior returning charge system in this embodiment, the returning charge spiral pipe in the drying section of whitewashing granulator barrel 1 does not have the installation, and the returning charge spiral pipe in setting up is favorable to the heat preservation of returning charge material, reduces the material cooling loss energy because of outer returning charge appearance.

Working principle of guniting granulation system with external material returning pipe and external material returning system

In the embodiment, the barrel 1 of the guniting granulator rotates under the action of an external gear traditional system, slurry containing fertilizer is sprayed into the guniting granulator from a spray gun 22 arranged at the head of the barrel 1 of the guniting granulator, hot air enters the head from a hot air inlet 23 arranged below a feeding box body 21 at the head of the barrel 1 of the guniting granulator, the fertilizer slurry is dried after passing through a hot air distribution plate in the feeding box body 21, dried material particles are continuously absorbed by new fertilizer to grow up gradually in the process of moving from the head to the tail in the rotating guniting granulator barrel 1, on the other hand, the dried material particles are lifted to form a material curtain under the action of a lifting plate 16 in the barrel 1 of the guniting granulator, are gradually dried by the hot air, the dried fertilizer particles enter a grading cone 10 at the tail, and when meshes of a grading cone screen mesh 104 are arranged on a grading slope 101 of the grading cone 10, the small-particle fertilizer falls out of the grading cone 10, enters a cavity formed by enclosing the tail and the grading cone 10, enters the first outer return pipe 18 through a first outer return pipe inlet 181 arranged on the inner wall of the cavity, and finally returns to the head of the granulator through a first outer return pipe outlet 182 through an outer return spiral for re-granulation.

In addition, still be provided with the interior returning charge system that interior returning charge spiral pipe 13 constitutes in the granulator barrel 1, through including returning charge spiral pipe 13 entry add the filter screen, can prevent that large granule material and qualified granule material from getting into in returning charge spiral pipe 13 again and returning the aircraft nose and towards the latest granulation, have worsened the dissolubility of the fertilizer granule of preparation. In order to prevent the mesh of the filter screen from being blocked and reduce the function of the internal material returning spiral, a knocking device similar to the vibrating device 12 arranged on the outer wall surface of the grading slope surface 101 of the grading cone 10 is arranged on the surface, opposite to the feeding direction, in the filter screen, when a rotary drum of the granulator rotates, the filter screen is hit periodically, fertilizer particles adhered to the meshes are removed in time through vibration, and the filter screen is ensured to be smooth. By combining the two aspects, the process of spraying granulation, screening and separating small granular fertilizer from the grading cone 10 at the tail of the machine, returning the small granular fertilizer to the machine head again through the outer material returning pipe and continuing granulation is completed.

Because the utility model discloses an external material returning pipe and outer material returning system, therefore, can reduce the inside quantity of interior material returning spiral pipe of granulator, reduce interior material returning spiral pipe size, like this, though reduce the interior material returning spiral pipe of version and still attach to the cylinder inner wall, nevertheless because quantity and volume size reduce, therefore can correspondingly reduce and crowd and account for flight mounted position space, corresponding increase flight quantity, thereby improve the speed that the fertilizer granule that generates after the granulation removed from the aircraft nose to the tail, also can be under the effect of material returning spiral pipe in the performance, promote the drying efficiency of granulator. In addition, because the external material returning pipe and the external material returning system are adopted, the material returning quantity of the internal material returning spiral pipe can be greatly reduced, the service life of the internal material returning spiral pipe can be prolonged, the startup and shutdown times of the granulator caused by the blockage of the internal material returning spiral pipe and other reasons are reduced, and the production capacity of the granulator can be improved.

In addition, in this embodiment, granulator tail passes through the induced air pipeline and communicates exhaust-gas treatment system in proper order, draught fan and chimney, the draught fan provides little negative pressure operating environment for fertilizer air atomizing guniting granulation system, dust and smell that the negative pressure suction produced in atomizing guniting granulation process, and concentrate to exhaust-gas treatment system in through the induced air pipeline and administer, replace venturi dust collecting equipment for the spray column, can increase the crosscut area of exhaust-gas passageway, reduce the windage, the spray column can set up to single tower, also can set up to the many towers of establishing ties, therefore, granulation system energy consumption obviously descends, system operation is also more stable.

The above description is only one embodiment of the present invention, and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims (10)

1. An organic fertilizer air atomization spray granulation system comprises a bacteria residue storage tank, a bacteria residue conveying pipeline, a spray granulation machine, a compressed air spray gun, an induced draft pipeline, an induced draft fan, a waste gas treatment system and a chimney, wherein,

one end of the fungus dreg conveying pipeline is communicated with the fungus dreg storage tank, and the other end of the fungus dreg conveying pipeline is connected with the compressed air spray gun;

the spray gun is arranged at the head of a granulator barrel of the guniting granulator, the spray gun carries out guniting atomization granulation through compressed air, and the spray gun comprises a gun barrel and a nozzle;

the tail of the granulator of the guniting granulator is sequentially communicated with the waste gas treatment system, the draught fan and the chimney through a draught pipeline;

the guniting granulator comprises an external screening and returning system, and the external screening and returning system returns materials from the tail of the granulator to the head and the middle drying section.

2. The organic fertilizer air atomization, guniting and granulation system as claimed in claim 1, wherein the waste gas treatment system comprises a cyclone separator, a spray tower, a wet electric precipitator, a condenser and a low-temperature plasma device which are sequentially communicated through the induced air pipeline.

3. The organic fertilizer air atomization spraying granulation system of claim 1, wherein the induced draft fan provides negative pressure for the spraying granulator and the waste gas treatment system, and pumps and exhausts waste gas generated by the spraying granulator in the granulation process, and the pressure of the induced draft fan is 0.7-0.75 MPa.

4. The organic fertilizer air atomization guniting granulation system according to claim 2, wherein the spray tower is a two-stage series connection cyclone type industrial waste gas spray tower and comprises a first-stage spray tower and a second-stage spray tower, wherein a layer of cyclone plate is arranged at the top inside the first-stage spray tower, three layers of cyclone plates are separately arranged inside the second-stage spray tower and used for separating and removing fog drops in gas, and the spray header and the atomization spray header are arranged above and/or below the cyclone plates.

5. The air atomization guniting granulation system for organic fertilizer according to any one of claims 1 to 4, further comprising a lifter, a screening machine, a pulverizer and an external return feeding pipe which are sequentially connected through a closed pipeline; the outer material returning feeding pipe is arranged in a machine head of the granulator; the hoister is communicated with the tail of the granulator.

6. The organic fertilizer air atomization guniting granulation system according to claim 1, wherein the external screening return system comprises an external return pipe, the external return pipe comprises a first external return pipe, a first external return pipe inlet and a first external return pipe outlet, and the first external return pipe is externally and spirally mounted on the outer wall of a cylinder body of the guniting granulation machine;

a grading cone is arranged between the drying section and the tail of the barrel of the guniting granulator and comprises a cone and a guide cylinder, the cone is a hollow barrel with two open ends and smooth inner wall, the guide cylinder is communicated with the small-diameter open end of the cone, and a grading cone screen is arranged on the grading slope surface of the cone;

the inlet of the first outer return pipe is communicated with a cavity formed by enclosing the tail and the grading cone, and the outlet of the first outer return pipe is communicated with a cylinder of the drying section of the granulator.

7. The organic fertilizer air atomization guniting granulation system as claimed in claim 6, wherein an inner return spiral pipe extending from the granulator tail to the granulator head is arranged in the granulator barrel, and the outlet of the first outer return pipe is communicated with the inner return spiral pipe.

8. The organic fertilizer air atomization guniting granulation system as claimed in claim 7, wherein an inlet end of the inner return material spiral pipe is arranged between a drying section and a tail section of the granulator barrel, a filter screen with the diameter consistent with that of a mesh of the grading cone screen is arranged at the inlet end of the inner return material spiral pipe, and an outlet of the first outer return material pipe is communicated with the inlet end or the middle section of the inner return material spiral pipe.

9. The air atomization spraying granulation system for organic fertilizer as claimed in claim 6, wherein the mesh diameter of the grading cone screen is 0.6-0.9 times of the granulation diameter according to the granulation diameter of the spraying granulator.

10. An organic fertilizer air atomization, slurry spraying and granulating system as claimed in any one of claims 6-9, wherein the granulator head is provided with a second outer return pipe, a blanking port of the second outer return pipe is positioned away from a hot air inlet of the granulator head and is arranged in a staggered manner with respect to the spray gun, the spray gun is positioned on the central axis of the barrel of the granulator, the blanking port of the second outer return pipe is arranged near the inner wall of the barrel of the granulating section of the slurry spraying and granulating machine, and the spray nozzle is closer to the granulator head than the blanking port of the second outer return pipe.

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