CN107990688A - Moist material low-temperature negative-pressure drying means and its equipment - Google Patents
Moist material low-temperature negative-pressure drying means and its equipment Download PDFInfo
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- CN107990688A CN107990688A CN201711406228.0A CN201711406228A CN107990688A CN 107990688 A CN107990688 A CN 107990688A CN 201711406228 A CN201711406228 A CN 201711406228A CN 107990688 A CN107990688 A CN 107990688A
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- 239000000463 material Substances 0.000 title claims abstract description 153
- 238000001035 drying Methods 0.000 title claims abstract description 121
- 238000000034 method Methods 0.000 claims abstract description 20
- 238000010438 heat treatment Methods 0.000 claims abstract description 14
- 239000007787 solid Substances 0.000 claims abstract description 14
- 239000000428 dust Substances 0.000 claims abstract description 6
- 238000002156 mixing Methods 0.000 claims description 19
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 15
- 230000008676 import Effects 0.000 claims description 9
- 230000003834 intracellular effect Effects 0.000 claims description 9
- 239000007921 spray Substances 0.000 claims description 7
- 230000008542 thermal sensitivity Effects 0.000 claims description 7
- 238000011282 treatment Methods 0.000 claims description 6
- 238000007791 dehumidification Methods 0.000 claims description 4
- 239000010802 sludge Substances 0.000 claims description 4
- 241000195493 Cryptophyta Species 0.000 claims description 3
- 239000010865 sewage Substances 0.000 claims description 3
- 238000005265 energy consumption Methods 0.000 abstract description 7
- 230000035939 shock Effects 0.000 abstract description 7
- 230000009965 odorless effect Effects 0.000 abstract description 3
- 230000000694 effects Effects 0.000 description 9
- 238000001704 evaporation Methods 0.000 description 6
- 230000008020 evaporation Effects 0.000 description 6
- 230000033001 locomotion Effects 0.000 description 6
- 239000002245 particle Substances 0.000 description 5
- 230000001105 regulatory effect Effects 0.000 description 4
- 238000000926 separation method Methods 0.000 description 4
- 230000018044 dehydration Effects 0.000 description 3
- 238000006297 dehydration reaction Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 235000013312 flour Nutrition 0.000 description 3
- 230000005653 Brownian motion process Effects 0.000 description 2
- 238000009835 boiling Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000007605 air drying Methods 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 210000002421 cell wall Anatomy 0.000 description 1
- 238000013016 damping Methods 0.000 description 1
- 238000002224 dissection Methods 0.000 description 1
- 239000013618 particulate matter Substances 0.000 description 1
- 230000001717 pathogenic effect Effects 0.000 description 1
- 244000144977 poultry Species 0.000 description 1
- 239000012254 powdered material Substances 0.000 description 1
- 238000010992 reflux Methods 0.000 description 1
- 230000000717 retained effect Effects 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000011144 upstream manufacturing Methods 0.000 description 1
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F26—DRYING
- F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
- F26B17/00—Machines or apparatus for drying materials in loose, plastic, or fluidised form, e.g. granules, staple fibres, with progressive movement
- F26B17/10—Machines or apparatus for drying materials in loose, plastic, or fluidised form, e.g. granules, staple fibres, with progressive movement with movement performed by fluid currents, e.g. issuing from a nozzle, e.g. pneumatic, flash, vortex or entrainment dryers
- F26B17/107—Machines or apparatus for drying materials in loose, plastic, or fluidised form, e.g. granules, staple fibres, with progressive movement with movement performed by fluid currents, e.g. issuing from a nozzle, e.g. pneumatic, flash, vortex or entrainment dryers pneumatically inducing within the drying enclosure a curved flow path, e.g. circular, spiral, helical; Cyclone or Vortex dryers
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F26—DRYING
- F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
- F26B21/00—Arrangements or duct systems, e.g. in combination with pallet boxes, for supplying and controlling air or gases for drying solid materials or objects
- F26B21/001—Drying-air generating units, e.g. movable, independent of drying enclosure
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F26—DRYING
- F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
- F26B25/00—Details of general application not covered by group F26B21/00 or F26B23/00
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Drying Of Solid Materials (AREA)
Abstract
The invention discloses a kind of low-temperature negative-pressure drying means and its equipment, comprise the following steps：1) turbulent flow heating：Under negative pressure and cryogenic conditions, moist material is heated using hot wind, while cutting shock is carried out to moist material, moist material forms turbulent flow with air-flow after being crushed and carries out violent heat exchange；2) cyclone drying：Under negative pressure and cryogenic conditions, the material after turbulent flow is heated carries out cyclone drying with air-flow, and material is further dried to extend heat-exchange time；3) gas-solid shunts：Under negative pressure and cryogenic conditions, the air-flow of the carrying material after cyclone drying is subjected to gas-solid and isolates dried material and tail gas；4) dedusting and clout are collected：Under negative pressure and cryogenic conditions, tail gas is subjected to dust removal process, collects remaining part dried material.This drying means and equipment drying efficiency are high, it is adjustable significantly to save energy consumption, vacuum, and whole system clean hygiene odorless.
Description
Technical field
The present invention relates to moist material dry technology, in particular to a kind of moist material low-temperature negative-pressure drying means and its sets
It is standby.
Background technology
In actual production process, the drying to moist material, difficult dehydrate especially to thermal sensitivity, containing intracellular water
Material is (such as：Municipal sludge) drying, be an extremely complex technical process, it is necessary to consider to numerous influence factors
And control, such as：Drying temperature, air pressure, drying time, energy consumption, the qualified discharge of tail gas, safe and healthy, equipment investment, yield and
System stability etc..
At present, the drying to moist material mainly uses simple heated-air drying or press dewatering, existing drying means
High energy consumption, otherwise drying effect is undesirable, or treatment effeciency is not high, or can not efficient drying material intracellular water
Etc., it is difficult to accomplish to take into account various aspects, some shortcomings are constantly present, and these shortcomings are often brought very to related practitioner
Big puzzlement.Therefore, how break-through skill problem, find a kind of good drying means of comprehensive effectiveness and become with equipment and urgently solve
Technical problem certainly.
The content of the invention
Present invention aim to provide a kind of moist material low-temperature negative-pressure drying means and its equipment, this method and its
Equipment energy consumption is low, drying effect is good, drying efficiency is high, and the intracellular water of energy efficient drying moist material, quick to realize dry take off
Water.
To achieve the above object, the technical solution adopted by the present invention is：A kind of moist material low-temperature negative-pressure drying means, its
It is characterized in that：Comprise the following steps：
1) turbulent flow heating：Under negative pressure and cryogenic conditions, moist material is heated using hot wind, while to damp mass
Material carries out cutting shock, and moist material with air-flow forms turbulent flow after being crushed, and carries out violent heat exchange；
2) cyclone drying：Under negative pressure and cryogenic conditions, the material after turbulent flow is heated carries out cyclone drying with air-flow, with
Extend heat-exchange time, material is further dried；
3) gas-solid shunts：Under negative pressure and cryogenic conditions, the air-flow of the carrying material after cyclone drying is subjected to gas-solid point
Stream, isolates dried material and tail gas；
4) dedusting and clout are collected：Under negative pressure and cryogenic conditions, tail gas is subjected to dust removal process, remaining part is collected and does
Dry material.
Further, step 5) circulation of tail gas is further included：Tail gas after dedusting and clout are collected first carries out dehumidification treatments,
It is recirculated back to in step 1), step 2), step 3) and step 4), to adjust stream pressure and control temperature, and realizing tail
Gas zero.
Further, in the step 1) or step 2) or step 3) or step 4), adjust stream pressure for -0.01~-
0.09Mpa,
Further, in the step 1) or step 2) or step 3) or step 4), adjust stream pressure for -0.04~-
0.08Mpa,
Further, in the step 1) or step 2) or step 3) or step 4), controlled at 50~80 DEG C.
Further, in the step 1) or step 2) or step 3) or step 4), controlled at 60~70 DEG C.
Further, in the step 1), the moisture content of moist material is 20~80%；In the step 3), dried object
Expect moisture content≤15%.
Further, in the step 1), step 2), step 3) and step 4), using outside air come adjust pressure and
Control temperature.
Further, in the step 1), moist material is thermal sensitivity or the difficult dehydrated material containing intracellular water.
Further, in the step 1), moist material is the sludge, kitchen garbage, poultry produced in sewage disposal process
The fowl and animal excrement or algae and water that animal husbandry produces.
Further, in the step 1), opposite cutting is carried out to moist material using rotary cutter and is hit.
Further, in the step 1), the moisture content of moist material is 45~65%.
A kind of moist material low-temperature negative-pressure drying equipment, including pressure-adjusting type hot wind mixing chamber, the pressure-adjusting type hot wind mixing
Room is equipped with high-temperature hot-air import, low temperature hot-blast outlet and pressure regulation temperature control mouth, is connected with heat power supply device in the high-temperature hot-air import, institute
State and turbulent eddy flow negative pressure drying machine is connected with low temperature hot-blast outlet, in the dried material outlet of the turbulent flow eddy flow negative pressure drying machine
Whirlwind collector is connected with, deduster is connected with the gas outlet of the whirlwind collector, is connected on the clean gas outlet of the deduster
There is exhaust fan.
Further, be connected with dehydrating unit on the air outlet of the exhaust fan, the drying gas outlet of the dehydrating unit with
The pressure regulation temperature control mouth connection.
Further, the dehydrating unit is spray column or heat pump.
Further, the drying gas outlet of the dehydrating unit on the connecting line of the pressure regulation temperature control mouth with being connected with the external world
Air intake duct and pressure regulator valve.
Further, the heat power supply device is direct-fired heater；The deduster is high humidity nanometer deduster.
Further, the turbulent eddy flow negative pressure drying machine includes turbulent section and eddy flow section, and the turbulent flow section bottom wall edge is cut
To equipped with hot wind inlet, be equipped with can high-speed rotating cutter for bottom in the turbulent flow section；The eddy flow section includes cone cylinder and fixation
Discharge nozzle in cone cylinder center.
Further, it is connected with charging screw conveyor in the moist material import of the turbulent eddy flow negative pressure drying machine.
Compared with prior art, the present invention has the following advantages：
First, the drying mode that the present invention is combined using turbulent flow heating with cyclone drying, and gas solid separation is combined, very
Moist material moisture content is reduced to less than 15% (the operating temperature cooperation adjusting gained in 50 DEG C~80 DEG C sections in the short time
- 0.01~-0.09 gauge pressure of system negative pressure drying atmosphere in, can effectively destroy biological cell wall release intracellular water, to aqueous
The material of high, the water containing intracellular, the difficult dehydration of the thermal sensitivity of rate 20~80%, which can be dried in 20 seconds to 5%~15%, to be contained
Water rate), drying efficiency is very high.Not only drying efficiency is high by the present invention, also with energy consumption is low, vacuum is adjustable, harmful substance zero
The advantages of discharge and clean hygiene odorless, it is often more important that the present invention is in difficult dehydrate to thermal sensitivity, containing intracellular water
The dried material calorific value that material obtains after being dried under negative pressure and cryogenic conditions is very high, is high value added product.
Second, in turbulent heating process, strong turbulent flow brings following effect to material：First, material and material
Between, between material and furnace wall, between material and cutter can continue that strong shock occurs, all materials will in this process
Complete powdered, particle obtains minimum weight, easy to material as air-flow moves together；Second, since Brownian movement is rail
The completely random state of mark, thus it is intergranular collision the frequency than direct current or eddy flow then improve hundreds times even it is thousands of
Times, this process has further deepened the heating degree and powdered degree of material；3rd, since the powdered of material is filled very much
Point, the area of material heating surface also greatly increases, this is the major reason that moisture evaporation is further speeded up；4th, due to material
The residence time is very short in Brownian motion process in this stove, has significantly been carried than the heating and drying speed of direct current or eddy flow
Rise, a certain amount of material generally can complete desiccation at ten seconds or so so that the drying efficiency of a full set of system becomes very high；
5th, whole cavity space is in negative pressure state, and thermodynamic principles show, under this state the boiling point of moisture by air pressure reduce and
Reduce, this also accelerates evaporation to provide good condition for moisture.
Third, since turbulent flow carries out very violent, turbulent section residence time of the material in turbulent eddy flow negative pressure drying machine
It is extremely short, after this level-one drying process is quick, then advance in the eddy flow section of turbulent eddy flow negative pressure drying machine, due to
This level-one swirl path is longer, and the material of the desiccation overwhelming majority can obtain more sufficiently drying in the drying of this level-one
Time, material moisture can be reduced further.
Fourth, the present invention significantly saves energy consumption, common drying equipment, since ability is right after obtaining higher temperature
Processing is dried in material, this inherently needs very big energy consumption；And the operating temperature holding low temperature of this drying system whole process is
Drying effect can efficiently be reached, for the treatment temperature than common hundreds of easily degrees Celsius, this technical characterstic is by band
Carry out great energy-saving effect；Further, since wind turbine is arranged on the tail end of system, the tail gas come out from wind turbine is connected to by muffler
Can also further it be recycled after hot wind mixing chamber, air-flow damping substantially reduces, these are all the height for increasing energy utilization rate
Effect means.
Fifth, the present invention has vacuum adjustability, the mixed wind entrance of hot wind mixing chamber is provided with into air lock, for gate
One specific opening and closing degree is set in a larger section, you can obtains different corresponding system suction strengths；This
Play the role of to flexible control system working condition splendid；Operator can be by certain needed for the adjusting acquisition of air quantity to mixing
Internal vacuum corresponding to functional relation, this just considerably increases the flexibility of system control and science.This is this set side
One spotlight of method.
Sixth, the present invention has the operating condition of clean hygiene odorless, internal system uses the working condition of negative pressure, nothing
Flour dust overflow, operating condition safety and sanitation.
Brief description of the drawings
Fig. 1 is a kind of structure diagram of moist material low-temperature negative-pressure drying equipment.
Fig. 2 is the structure diagram of the turbulent eddy flow negative pressure drying machine in Fig. 1.
Fig. 3 is the cross-sectional view of Fig. 2.
Fig. 4 is the work flow diagram of moist material low-temperature negative-pressure drying equipment in Fig. 1.
Embodiment
The present invention is described in further detail with specific embodiment below in conjunction with the accompanying drawings, easy to more clearly understand this
Invention, but they do not form the present invention and limit.
A kind of low-temperature negative-pressure drying system equipment as shown in Figure 1 is followed successively by the heat source mutually connected with pipeline from left to right
Device 1, pressure-adjusting type hot wind mixing chamber 2, turbulent eddy flow negative pressure drying machine 3, whirlwind collector 4, deduster 5, exhaust fan 6, dehumidifying
Device 7；Pressure-adjusting type hot wind mixing chamber 2 is equipped with high-temperature hot-air import 2.1, low temperature hot-blast outlet 2.2 and pressure regulation temperature control mouth 2.3, high
Heat power supply device 1 is connected with warm wind inlet 2.1, which is direct-fired heater, is connected with low temperature hot-blast outlet 2.2
Turbulent eddy flow negative pressure drying machine 3, is connected with charging screw conveyor in the moist material import 3.2 of turbulent eddy flow negative pressure drying machine 3
0, the dried material of turbulent eddy flow negative pressure drying machine 3 exports is connected with whirlwind collector 4, the gas outlet of whirlwind collector 4 on 3.1
Deduster 5 is connected with 4.1, deduster 5 uses high humidity nanometer deduster, exhaust fan is connected with the clean gas outlet 5.1 of deduster 5
6, be connected with dehydrating unit 7 on the air outlet 6.1 of exhaust fan 6, which uses spray column or heat pump, dehydrating unit 7 it is dry
Pathogenic dryness outlet 7.1 is connected with pressure regulation temperature control mouth 2.3, the drying gas outlet 7.1 of dehydrating unit 7 and the connection of pressure regulation temperature control mouth 2.3
Outside air air inlet pipe 8 and pressure regulator valve 10 are connected with pipeline (tail gas return duct 9), outside air air inlet pipe 8 connects outside atmosphere,
Open and-shut mode is controlled with automatic valve 11, the position of pressure-adjusting type hot wind mixing chamber 2 is provided with a tune in tail gas return duct 8
Pressure valve 10, with the air pressure size of control reflux.This equipment is a complete dry materials closed loop circuit system.
With reference to Fig. 2, shown in Fig. 3, turbulent eddy flow negative pressure drying machine 3 includes anterior turbulent section 3.3 and the eddy flow section at rear portion
3.4, turbulent 3.3 upper side of section outlet is connected with eddy flow section 3.4, and turbulent 3.3 bottom wall of section is tangentially equipped with hot wind inlet 3.5,
In turbulent section 3.3 bottom be equipped with can high-speed rotating cutter 3.6, in the moist material import 3.2 of turbulent eddy flow negative pressure drying machine 3
It is connected with charging screw conveyor 0；Eddy flow section 3.4 includes cone cylinder 3.41 and the discharge nozzle for being fixed on the center of cone cylinder 3.41
3.42。
As shown in figure 4, above-mentioned low-temperature negative-pressure drying system equipment to moist material (especially thermal sensitivity, water containing intracellular,
Hardly possible dehydration material) drying process and principle it is as follows：
1) hardened moist treating material is added in turbulent eddy flow negative pressure drying machine 3 by the screw conveyor 0 that feeds；
The dissection of the high speed rotating tool inside turbulent eddy flow negative pressure drying machine 3 can be received at once into later material, so that
Smashing becomes more smaller block；The rotary cutter carries out opposite cutting for material and hits, and makes material and air-flow shape
Into violent turbulent flow (material carry out Brownian movement)；
2) direct-fired heater 1 provides whole system stable original hot wind；The temperature of this hot wind is usually 100
More between hundreds of degrees Celsius (selection of specific power can depend on the needs)；
3) hot wind is entered after pressure-adjusting type hot wind mixing chamber 2, and the cold wind of room temperature is mixed into also while herein and obtains 50
DEG C~operating temperature in 80 DEG C of sections, you can good drying effect is obtained, the power consumption of this temperature range will be very small；Separately
Outside, above-mentioned room temperature cold wind is to enter pressure regulation hot wind mixing chamber 2 from tail gas return duct 9, by the unlatching journey for operating pressure regulator valve 10
The air quantity of the i.e. controllable returned cold wind of degree, with the vacuum size inside regulating system, the operating temperature in 50 DEG C~80 DEG C sections
System negative pressure (gauge pressure, vacuum) -0.01~-0.09MPa obtained by adjusting is coordinated to use, preferably -0.04~-0.08MPa,
Work hot wind (being different from original hot wind) after adjusting and be sufficiently mixed above is then gone through in turbulent negative pressure drying stove 3, with
Material mixes small size therein soon；
4) since the direction of rotation of the high speed rotating tool of turbulent 3 leading portion bottom of eddy flow negative pressure drying machine is specifically designed to be
With having just enter into cavity the hot wind direction that works on the contrary, so the air-flow in whole cavity returns back out existing very violent turbulent condition,
Form strong Brownian movement state；This strong turbulent flow brings following effect to material：First, material and material it
Between, between material and furnace wall, between material and cutter can continue that strong shock occurs, all materials will be complete in this process
Full powdered, particle obtains minimum weight, easy to material as air-flow moves together；Second, since Brownian movement is track
Complete random state, so the intergranular collision frequency then improves hundreds times or even thousands of times than direct current or eddy flow,
This process has further deepened the heating degree and powdered degree of material；3rd, since the powdered of material is very abundant,
The area of material heating surface also greatly increases, this is the major reason that moisture evaporation is further speeded up；4th, since material is at this
The residence time is very short in Brownian motion process in stove, and the heating and drying speed than direct current or eddy flow has been substantially improved,
A certain amount of material generally can complete desiccation at ten seconds or so so that the drying efficiency of a full set of system becomes very high；The
Five, whole cavity space is in negative pressure state, and thermodynamic principles show, air pressure is reduced and subtracted by the boiling point of moisture under this state
Small, this also accelerates evaporation to provide good condition for moisture；General effect is exactly：The operating temperature in 50 DEG C~80 DEG C of sections is matched somebody with somebody
In the drying atmosphere for closing system negative pressure (gauge pressure, vacuum) -0.01~-0.09MPa for adjusting gained, thermal sensitivity is high, containing born of the same parents
The material of interior water, difficult dehydration can be dried in 20 seconds to 5%~15% moisture content；Further, since whole turbulent flow is dry
During carry out Brownian movement, the mainly violent heat exchanging process of progress, the moisture in material obtains in this process
Also evaporation has advanced to the link of next drying process, therefore the temperature in turbulent negative pressure drying stove 3 to amount of heat comprehensively
Degree also has the characteristics that equalization stable；With the powdered material particles of heat with the turbulent eddy flow negative pressure drying of the entrance of air-flow one
The eddy flow of formation rule immediately after 3 back segment of machine；Since the path of this process materials movement and time are longer, moisture evaporation is filled
Point, the drying of material is basically completed in this stage, and general moisture content can be dried to less than 15%；
5) after the dried material particles of completion go successively to whirlwind collector 4 with air-flow, in internal generation gas and admittedly
The separation of body：Solid (i.e. dried material) after separation is then under bottom deposit；The dried material constantly deposited
It is collected in the bottom of whirlwind collector 4；Gas goes successively to next link 6 after separation)；
6) this portion gas is called dry tail gas, generally can also carry a small amount of minitype particle secretly and enter 5 (filter board hole of deduster
Footpath is less than 0.1 micron), the particulate matter in tail gas nearly all can not can also so be collected by its filter plate in deduster 5
The drying clout being once finally retained down；And the dustless tail gas that is then almost discharged has entered next link 6)；Therefore,
This set drying system almost non-flour dust overflow, is the production equipment of very hygienic environment-protecting；
7) exhaust fan 6 is the power resources that a full set of internal system obtains " negative pressure ", is specially will in design invention the system
Wind turbine is arranged on drying stage and the downstream links in rewinding dedusting stage, you can makes to obtain less than the external world in the equipment cavity of upstream
The pressure of atmospheric pressure, this operating condition not only improve dry efficiency as previously mentioned, while also so that equipment does not have
Flour dust overflow, fool proof health；
8) enter from the air-flow that exhaust fan 6 is blown out after spray column and then complete last clean processing together, ensure final
Tail gas can fully meet the requirement of discharge；
9) 9 right end of tail gas return duct of system includes two branch pipes, and a branch pipe is outside air air inlet pipe 8, and connection is outer
Boundary's air, the control of break-make is carried out by automatic valve 11；Another branch pipe is tail gas return duct 9, is to connect spray column most
Finality tracheae, the left end of tail gas return duct 9 then connect pressure-adjusting type hot wind mixing chamber 2.
Embodiment 1
To the moist material (kitchen garbage) that moisture content is 65%, the method for carrying out low-temperature negative-pressure drying, including following step
Suddenly：
1) turbulent flow heating：Under negative pressure and cryogenic conditions, in the turbulent section of turbulent eddy flow negative pressure drying machine 3, heat is utilized
Wind heats moist material, while cutting shock is carried out to moist material, and moist material forms disorderly with air-flow after being crushed
Stream, carries out violent heat exchange；
2) cyclone drying：Under negative pressure and cryogenic conditions, in the eddy flow section of turbulent eddy flow negative pressure drying machine 3, turbulent flow adds
Material after heat carries out cyclone drying with air-flow, to extend heat-exchange time, material is further dried；
3) gas-solid shunts：Under negative pressure and cryogenic conditions, in whirlwind collector 4, by the carrying material after cyclone drying
Air-flow carry out gas-solid shunting, isolate dried material and tail gas, tail gas qualified discharge, dried material moisture content≤15%；
4) dedusting and clout are collected：Under negative pressure and cryogenic conditions, in high humidity nanometer deduster, tail gas is subjected to dedusting
Processing, collects remaining part dried material；
5) vacuumized using exhaust fan 6, and pressure-adjusting type hot wind mixing chamber is introduced external air into from outside air air inlet pipe 8
In 2, temperature and vacuum are controlled by the aperture of pressure regulator valve 10 so that the hot blast temperature come out from pressure-adjusting type hot wind mixing chamber 2
For 50 DEG C, pressure is -0.08Mpa, i.e.,：Utilize outside air regulating step 1), step 2) and the vacuum of step 3) and step 4)
Degree and temperature.
Embodiment 2
To the moist material (sludge produced in sewage disposal process) that moisture content is 45%, low-temperature negative-pressure drying is carried out
Method, comprises the following steps：
1) turbulent flow heating：Under negative pressure and cryogenic conditions, in the turbulent section of turbulent eddy flow negative pressure drying machine 3, heat is utilized
Wind heats moist material, while cutting shock is carried out to moist material, and moist material forms disorderly with air-flow after being crushed
Stream, carries out violent heat exchange；
2) cyclone drying：Under negative pressure and cryogenic conditions, in the eddy flow section of turbulent eddy flow negative pressure drying machine 3, turbulent flow adds
Material after heat carries out cyclone drying with air-flow, to extend heat-exchange time, material is further dried；
3) gas-solid shunts：Under negative pressure and cryogenic conditions, in whirlwind collector 4, by the carrying material after cyclone drying
Air-flow carry out gas-solid shunting, isolate dried material and tail gas, dried material moisture content≤15%；
4) dedusting and clout are collected：Under negative pressure and cryogenic conditions, in high humidity nanometer deduster, tail gas is subjected to dedusting
Processing, collects remaining part dried material.
5) circulation of tail gas：Vacuumized using exhaust fan 6, and tail gas be subjected to dehumidification treatments first with spray column 7 or heat pump,
Then tail gas is introduced into pressure-adjusting type hot wind mixing chamber 2 using tail gas return duct 9, by the aperture of pressure regulator valve 10 control temperature and
Vacuum so that the hot blast temperature come out from pressure-adjusting type hot wind mixing chamber 2 is 80 DEG C, and pressure is -0.04MPa, i.e.,：Utilize tail gas
Regulating step 1), step 2) and the vacuum and temperature of step 3) and step 4), realize tail gas zero-emission.
Embodiment 3
To the moist material (fowl and animal excrement or algae and water that animal husbandry produces) that moisture content is 50%, low-temperature negative-pressure is carried out
Dry method, comprises the following steps：
1) turbulent flow heating：Under negative pressure and cryogenic conditions, in the turbulent section of turbulent eddy flow negative pressure drying machine 3, heat is utilized
Wind heats moist material, while cutting shock is carried out to moist material, and moist material forms disorderly with air-flow after being crushed
Stream, carries out violent heat exchange；
2) cyclone drying：Under negative pressure and cryogenic conditions, in the eddy flow section of turbulent eddy flow negative pressure drying machine 3, turbulent flow adds
Material after heat carries out cyclone drying with air-flow, to extend heat-exchange time, material is further dried；
3) gas-solid shunts：Under negative pressure and cryogenic conditions, in whirlwind collector 4, by the carrying material after cyclone drying
Air-flow carry out gas-solid shunting, isolate dried material and tail gas, dried material moisture content≤15%；
4) dedusting and clout are collected：Under negative pressure and cryogenic conditions, in high humidity nanometer deduster, tail gas is subjected to dedusting
Processing, collects remaining part dried material.
5) circulation of tail gas：Vacuumized using exhaust fan 6, and tail gas be subjected to dehumidification treatments first with spray column 7 or heat pump,
Then tail gas is introduced into pressure-adjusting type hot wind mixing chamber 2 using tail gas return duct 9, by the aperture of pressure regulator valve 10 control temperature and
Vacuum so that the hot blast temperature come out from pressure-adjusting type hot wind mixing chamber 2 is 70 DEG C, and pressure is -0.06MPa, i.e.,：Utilize tail gas
Regulating step 1), step 2) and the vacuum and temperature of step 3) and step 4), realize tail gas zero-emission.
Claims (19)
- A kind of 1. moist material low-temperature negative-pressure drying means, it is characterised in that：Comprise the following steps：1) turbulent flow heating：Under negative pressure and cryogenic conditions, moist material is heated using hot wind, at the same to moist material into Row cutting is hit, and moist material with air-flow forms turbulent flow after being crushed, and carries out violent heat exchange；2) cyclone drying：Under negative pressure and cryogenic conditions, the material after turbulent flow is heated carries out cyclone drying with air-flow, to extend Heat-exchange time, is further dried material；3) gas-solid shunts：Under negative pressure and cryogenic conditions, the air-flow of the carrying material after cyclone drying is subjected to gas-solid shunting, point Separate out dried material and tail gas；4) dedusting and clout are collected：Under negative pressure and cryogenic conditions, tail gas is subjected to dust removal process, collects remaining part dried object Material.
- 2. moist material low-temperature negative-pressure drying means according to claim 1, it is characterised in that：Step 5) tail gas is further included to follow Ring：Tail gas after dedusting and clout are collected first carries out dehumidification treatments, be recirculated back to for step 1), step 2), step 3) and In step 4), to adjust stream pressure and control temperature, and tail gas zero-emission is realized.
- 3. moist material low-temperature negative-pressure drying means according to claim 1 or claim 2, it is characterised in that：The step 1) or step Rapid 2) or in step 3) or step 4), adjusting stream pressure is -0.01~-0.09Mpa.
- 4. moist material low-temperature negative-pressure drying means according to claim 1 or claim 2, it is characterised in that：The step 1) or step Rapid 2) or in step 3) or step 4), adjusting stream pressure is -0.04~-0.08Mpa.
- 5. moist material low-temperature negative-pressure drying means according to claim 1 or claim 2, it is characterised in that：The step 1) or step It is rapid 2) or in step 3) or step 4), controlled at 50~80 DEG C.
- 6. moist material low-temperature negative-pressure drying means according to claim 1 or claim 2, it is characterised in that：The step 1) or step It is rapid 2) or in step 3) or step 4), controlled at 60~70 DEG C.
- 7. moist material low-temperature negative-pressure drying means according to claim 1 or claim 2, it is characterised in that：In the step 1), tide The moisture content of wet stock is 20~80%；In the step 3), dried material moisture content≤15%.
- 8. moist material low-temperature negative-pressure drying means according to claim 1 or claim 2, it is characterised in that：The step 1), step 2), in step 3) and step 4), pressure and control temperature are adjusted using outside air.
- 9. moist material low-temperature negative-pressure drying means according to claim 1 or claim 2, it is characterised in that：In the step 1), tide Wet stock is thermal sensitivity or the difficult dehydrated material containing intracellular water.
- 10. moist material low-temperature negative-pressure drying means according to claim 1 or claim 2, it is characterised in that：In the step 1), Moist material is the fowl and animal excrement or algae and water that the sludge, kitchen garbage, animal husbandry produced in sewage disposal process produces.
- 11. moist material low-temperature negative-pressure drying means according to claim 1 or claim 2, it is characterised in that：In the step 1), Opposite cutting is carried out to moist material using rotary cutter to hit.
- 12. moist material low-temperature negative-pressure drying means according to claim 1 or claim 2, it is characterised in that：In the step 1), The moisture content of moist material is 45~65%.
- A kind of 13. moist material low-temperature negative-pressure drying equipment, it is characterised in that：Including pressure-adjusting type hot wind mixing chamber (2), the tune Pressure type hot wind mixing chamber (2) is equipped with high-temperature hot-air import (2.1), low temperature hot-blast outlet (2.2) and pressure regulation temperature control mouth (2.3), institute State and heat power supply device (1) is connected with high-temperature hot-air import (2.1), turbulent eddy flow negative pressure is connected with the low temperature hot-blast outlet (2.2) Drying machine (3), the dried material of the turbulent flow eddy flow negative pressure drying machine (3) exports is connected with whirlwind collector (4), institute on (3.1) State and deduster (5) is connected with the gas outlet (4.1) of whirlwind collector (4), on the clean gas outlet (5.1) of the deduster (5) It is connected with exhaust fan (6).
- 14. the moist material low-temperature negative-pressure drying equipment according to claim 13, it is characterised in that：The exhaust fan (6) Dehydrating unit (7), drying gas outlet (7.1) and the pressure regulation temperature control mouth of the dehydrating unit (7) are connected with air outlet (6.1) (2.3) connect.
- 15. the moist material low-temperature negative-pressure drying equipment according to claim 14, it is characterised in that：The dehydrating unit (7) For spray column or heat pump.
- 16. the moist material low-temperature negative-pressure drying equipment according to claims 14 or 15, it is characterised in that：The dehydrating unit (7) drying gas outlet (7.1) be connected with the connecting line of the pressure regulation temperature control mouth (2.3) outside air air inlet pipe (8) and Pressure regulator valve (10).
- 17. according to the 13 or 14 or 15 moist material low-temperature negative-pressure drying equipment of claim, it is characterised in that：The heat source Device (1) is direct-fired heater；The deduster (5) is high humidity nanometer deduster.
- 18. according to the 13 or 14 or 15 moist material low-temperature negative-pressure drying equipment of claim, it is characterised in that：The turbulent flow Eddy flow negative pressure drying machine (3) includes turbulent section (3.3) and eddy flow section (3.4), and described turbulent flow section (3.3) bottom wall is tangentially equipped with heat Wind inlet (3.5), described turbulent flow section (3.3) interior bottom is equipped with can high-speed rotating cutter (3.6)；Eddy flow section (3.4) bag Include cone cylinder (3.41) and be fixed on the discharge nozzle (3.42) in the cone cylinder (3.41) center.
- 19. according to the moist material low-temperature negative-pressure drying equipment of claim 13 or 14, it is characterised in that：The turbulent flow eddy flow Charging screw conveyor (0) is connected with the moist material import (3.2) of negative pressure drying machine (3).
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| CN201711406228.0A CN107990688A (en) | 2017-12-22 | 2017-12-22 | Moist material low-temperature negative-pressure drying means and its equipment |
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| CN201711406228.0A CN107990688A (en) | 2017-12-22 | 2017-12-22 | Moist material low-temperature negative-pressure drying means and its equipment |
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| CN108043543A (en) * | 2018-01-04 | 2018-05-18 | 深圳市泽源能源股份有限公司 | Material powders temperature adjustment processing unit and its a variety of application methods |
| CN108679957A (en) * | 2018-07-17 | 2018-10-19 | 北京中矿环保科技股份有限公司 | A kind of low temperature jet flow atomization coal slime drying process and system |
| CN113527009A (en) * | 2021-08-12 | 2021-10-22 | 中国热带农业科学院热带作物品种资源研究所 | Preparation method and product of ecological water-retention slow-release type super-large granular compound fertilizer |
| CN114940570A (en) * | 2022-07-11 | 2022-08-26 | 四川龙锦宇科技有限公司 | Oil-containing sludge deoiling and dewatering device, process and application |
| CN115060066A (en) * | 2022-07-11 | 2022-09-16 | 四川龙锦宇科技有限公司 | Novel biomass non-phase-change drying method, matching device system and application thereof |
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| CN115060066A (en) * | 2022-07-11 | 2022-09-16 | 四川龙锦宇科技有限公司 | Novel biomass non-phase-change drying method, matching device system and application thereof |
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Application publication date: 20180504 |