CN201268705Y - Blast furnace coal powder injection Y shaped distributor - Google Patents
Blast furnace coal powder injection Y shaped distributor Download PDFInfo
- Publication number
- CN201268705Y CN201268705Y CNU2008201123511U CN200820112351U CN201268705Y CN 201268705 Y CN201268705 Y CN 201268705Y CN U2008201123511 U CNU2008201123511 U CN U2008201123511U CN 200820112351 U CN200820112351 U CN 200820112351U CN 201268705 Y CN201268705 Y CN 201268705Y
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- divider
- coal
- distribution device
- distribution
- blast furnace
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Abstract
The utility model relates to a blast-furnace coal injection Y-shaped distribution device with the top provided with a combined type head cover, and the head cover is sealed by a double-layer sealing ring. Furthermore, the lower part of the distribution device is provided with a horn-shaped increasing coupling connected with a vertical pipe with a suitable length, a core distribution passage of the distribution device adopts inside lining porcelain, and the distribution device is also provided with a matchable environmental-friendly nitrogen back flushing system. The distribution device eliminates the environmental pollution when dredged on one hand and overcomes the technique defect that the coal supply of the blast furnace is failed for a long time caused by cleaning the distribution device on the other hand, and especially has uniform coal culm distribution because a distribution wimble of the distribution device is precisely matched with the increasing coupling, thereby being favorable to realizing continuous and uniform coal injection.
Description
Affiliated technical field
The utility model is applicable to the iron-smelting blast furnace breeze blowing.
Background technology
The pulverized coal injection in blast furnace technology is to utilize cheap non-coking coal partly to replace expensive metallurgical coke, remarkable economic efficiency is arranged, and the strengthening smelting and the furnace condition anterograde that help blast furnace, can increase substantially the technico-economical comparison of blast furnace, also can relax demand to coke, reduce the initial cost of building coke oven, reduce coking and produce pollution on the environment etc., so social benefit is also very remarkable.
At present, the pulverized coal injection in blast furnace device comprises winding-up jar, mixing tank (or fluidizer), divider, spray gun.In blast-furnace coal powder injection, what wish most is to give every spray gun with coal dust to stable and uniform.Adopt direct injection method to the coal powder injection of blast furnace stable and uniform now more, promptly utilize a main line that coal dust is transported near the blast furnace divider, and coal dust is transported to each air port of blast furnace by the defeated coal arm that links to each other with each outlet of divider for realizing.
As the divider of blast furnace blowing major equipment, through the now forms such as taper, disc type, bottle formula that adopt of years of development more.Conical distributor is back taper, and there is the distribution awl at the center, and pulverized coal flow upwards through distributing awl to cut into a plurality of equal fan-shaped streams thighs, is assigned to each air port through each arm of divider by the lower vertical pipe.Coal dust velocity variations before and after this divider is little, and the pressure drop of generation is little, so the export distributor flow is subject to distribute deviation can reach 20% by divider to different each arm that influences of the defeated coal arm crushing in air port.Distribute awl to stand upside down in the conical distributor, distribution awl vertical height is big and cone angle is little, and when coal dust enters divider by vertical tube, thereby because coal dust flow at high speed impact awl point is worn the awl point.When the awl point may wear to a certain degree, will have a strong impact on the assignment accuracy of divider.The disc type divider adopts tray type structure and vertical installation method.In the disc type divider, because gas---coal powder two-phase flow in vertical tube on when flowing, there is radially concentration distribution in certain distribution to coal dust because of gas velocity has in the pipe.Vertical tube bottom granule density height, skewness; And the top granule density is low, is evenly distributed.For guaranteeing coal dust uniform distribution in vertical tube, need reach the requirement of even dispersion by keeping sufficiently long vertical tube.The small blast furnace air port is less, and required export distributor is less, and the disc type divider can satisfy the blast furnace requirement substantially.When the blast furnace trend maximizes, be accompanied by the increase of air port number and the raising of coal ratio, just need to increase the requirement that the divider volume satisfies high-coal ratio, many spray guns.For the bevel-type divider, after volume increases the increase of export distributor number, more aggravated the inhomogeneous of coal dust distribution.And the disc type divider needs sufficiently long vertical pipeline section to satisfy the needs of coal dust even dispersion, in addition because disc type distributor body cavity height at least should be greater than the outlet caliber, the too little coal dust flow blind angle that then makes of cavity height increases, easily deposit and stop up, cause the back-mixing amount that solid-gas ratio fluctuates greatly and the impact cavity wall produces too little, thereby influence the homogeneity that coal dust distributes. when the export distributor number increases, need longer vertical tube and huger distributor body cavity owing to distributor body arm number need increase, this influences the homogeneity that coal dust distributes with regard to having caused coal dust disturbance in the divider core cavity.Because distributor body cylindrical cavity sectional area increases exponentially, needing to cause back-mixing coal amount excessive, impel the wearing and tearing of divider core to increase the weight of, and then cause the coal dust maldistribution, reduced the work-ing life of divider core.Large blast furnace can't be finished windy mouthful of drawback of jetting for fear of single divider, generally all uses two cover dividers to be arranged symmetrically in the blast furnace both sides, but has so both increased cost, can not effectively guarantee the homogeneity of each coal injection of draught amount.
Summary of the invention
In order to overcome the defective of conical distributor and disc type divider, designed " Y " shape coal powder injection special distribution device of comprehensive taper and disc type divider advantage.After adopting " Y " shape divider, can realize coal dust relatively stable uniform distribution in each air port.
This divider main body is " Y " shape.Dispenser top is established the built-up type top cover, and enclosing cover is fixing separately, and inner cap connects and distributes awl; Be provided with the divider core in the cavity, adopt the steady brace location; The divider bottom has tubaeform increaser to connect the vertical tube of suitable length; Divider is provided with supporting environment-friendly type nitrogen blowback system in addition.
Main design considerations is: when coal dust through and the defeated coal of level be responsible for the elbow that is connected and enter the vertical person in charge when upwards mobile, there is radially concentration distribution in certain distribution to coal dust because of gas velocity has in the pipe, by fully radially evenly diffusion of the section of development realization coal dust of the vertical person in charge.When the equally distributed coal dust in cross section enters in the distributor body flaring cross section from bottom to top in manage in vertical defeated coal is responsible for, speed reduces suddenly, through distributing awl that pulverized coal flow is risen along the conical surface, make the interior Dual-Phrase Distribution of Gas olid of cavity be in the state of quick fluidised form, and have certain residence time, distribute thereby reach the coal dust even dispersion, then by uniform Horizontal Exit smooth outflow on the divider core in the cavity.Because of coal dust fine particle followability is good, when carrying at a high speed, the swiftly flowing pulverized coal particle of part has increased the degree of mixing of coal dust in the cavity, and has obtained certain lag time because of inertial impaction cavity top produces back-mixing, and it is more even that coal dust is distributed.
This divider core is an annular, is built in the divider, distributes passage to be uniformly distributed in and distributes in-core portion, and outlet is corresponding one by one with the distributor body outlet.
The creativeness of this patent is embodied in:
1, divider is provided with the built-up type top cover, change impaired cone or cleaning when needs and only need utilize that blast furnace is of short duration to stop the coal time and open inner cap and just can finish during divider, need not dismantle the divider enclosing cover, so just shorten servicing time greatly, realize the continuous coal powder injection of blast furnace divider.
2, this novel divider combines the advantage that bevel-type divider increaser, distribution awl and disc type divider distribute core.Compare with the bevel-type divider, distribute the awl vertical height to dwindle, cone angle increases simultaneously, and pulverized coal flow by distributing awl, has slowed down boring the impact and the wearing and tearing of point after the increaser deceleration.At big-and-middle-sized blast furnace, under the high-coal ratio situation, when needing to increase the coal jetting branch number, this novel divider only need increase distributor body and divider core diameter, just can realize the divider core coal dust port number purpose corresponding with arm.Compare with the disc type divider, distribute the awl effect in this novel divider bottom increaser and the cavity, after making that pulverized coal flow enters the flaring cross section by the vertical defeated coal person in charge, flow velocity reduces suddenly, through distributing awl to split branch coal gas stream is risen along the conical surface, in the cavity of the conical surface and the formation of divider core, flow velocity continues to reduce to increase before the coal dust delivery port.Because the coal dust flow velocity is lower than flow velocity in the arm in the cavity of flaring cross section, well reduced because of the influence of arm pressure drag loss to the coal dust uniformly distributing, the disturbance that in the disc type dispenser cavity, has brought when having avoided coal dust to carry at a high speed.Because the existence of increaser directly increases the divider in-core, shorten interior external diameter spacing simultaneously, thereby reduced divider core coal dust channel resistance.This novel divider adopts the lined ceramics technology in divider core delivery outlet simultaneously, and the divider core was brought up to more than 10 months by 3 months work-ing life, has not only saved Master Cost, and has reduced because of changing the influence of divider core to the continuous coal powder injection of blast furnace.Therefore this novel divider can realize utilizing the rush-harvesting and rush-planting coal powder injection of single divider to large blast furnace fully, has adapted to the trend of utilizing the rush-harvesting and rush-planting coal powder injection to improve coal combustion rate.
3, the operation of the foreign material of divider cleaning for convenience, the method that in design, has adopted blow-back to clear up foreign material.
Description of drawings
Below in conjunction with accompanying drawing the utility model is described further:
Accompanying drawing 1 is the big lid vertical view of pulverized coal injection " Y " shape dispenser top, is respectively equipped with sealing groove at big lid upper and lower faces, as big lid and distributor body, sealing is used between lid and the tegillum greatly.
Accompanying drawing 2 is that the big lid of pulverized coal injection " Y " shape dispenser top A is to sectional view
Accompanying drawing 3 is pulverized coal injection " Y " shape dispenser top tegillum front view, and the drawing edge is a screw place sectional view, and divider reverse taper and top tegillum are connected as a single entity, and reverse taper partly is a wear-resistant material.
Accompanying drawing 5 is pulverized coal injection " Y " shape distributor body forward sectional view, is the R20cm circular arc in the increaser top, and main effect is to reduce the wearing and tearing of divider core.
Accompanying drawing 6 is pulverized coal injection " Y " shape divider vertical view:
1 for advancing the divider coal spraying pipeline; 2 is the dispenser top tegillum; 3 is the big lid of dispenser top; 4 is the export distributor tee ball valve; 5 is the export distributor coal jetting branch; 6 is the tee ball valve by-pass port.
Accompanying drawing 7 is pulverized coal injection " Y " shape divider nitrogen blowback system vertical view:
7 is nitrogen endless tube intake ducting; 8 is nitrogen source of the gas ball valve; 9 is the nitrogen endless tube; 10 for the nitrogen endless tube goes out gas branch pipe, and every goes out gas branch pipe and is connected with tee ball valve on the coal jetting branch by metallic hose; 11 is nitrogen endless tube strut member, by strut member nitrogen endless tube and divider intake ducting 1 is connected as a single entity.
Embodiment
Pulverized coal injection " Y " shape divider comprises: increaser, main distributor, top Da Gai, tegillum, divider core, export distributor coal jetting branch, nitrogen blowback system
Coal dust enters increaser by vertical coal spraying pipeline, enters main distributor again, and each coal powder injection passage uniformly distributing enters the export distributor coal jetting branch through the divider core, arrives each air port spray gun of blast furnace at last.
Need clear up when stopping up appears in each passage of divider, cleaning is divided into band coal nitrogen blowback and stops coal and open the cleaning of divider tegillum, and concrete steps are as follows:
1, nitrogen blowback environmental protection cleaning divider implementing method:
In the divider bottom nitrogen endless tube is set, by metallic hose the three-way valve on the coal jetting branch is connected with the nitrogen endless tube, when divider, coal jetting branch stop up not serious or stop up the foreign material volume hour, do not need to dismantle divider, as long as open blowback source of the gas ball valve, regulate three-way valve subsequently, utilize high pressure gas to purge inner skeleton or coal jetting branch, reach cleaning effect.Foreign material in the divider are delivered in the blast furnace by high pressure draft, reach the purpose of environmental protection cleaning divider.
2, use combination cover cleaning divider and replacing divider core implementing method:
Enclosing cover on distributor body, adopts common steel by 10-14 bolts sealing and fixing.Inner cap is fixed on outer covering by 4 bolts, and inner cap connects and distributes awl, and cone is a wear-resistant material.Need open divider tegillum cleaning divider when the nitrogen blowback can't be dredged divider, whole work needs 5 minutes approximately; Utilize the blast furnace maintenance chance to make regular check on the divider core, when needs are changed the divider core, open enclosing cover and change, need 15 minutes approximately.
Claims (4)
1. a pulverized coal injection " Y " shape divider comprises increaser, main distributor, it is characterized in that: the main body of divider is " Y " shape, and increaser is connected with main distributor.
2. coal powder injection according to claim 1 " Y " shape divider is characterized in that: about two top covers of built-up type.
3. coal powder injection according to claim 1 " Y " shape divider is characterized in that: divider core delivery outlet lined ceramics.
4. coal powder injection according to claim 1 " Y " shape divider is characterized in that: blow-back cleaning foreign material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008201123511U CN201268705Y (en) | 2008-08-26 | 2008-08-26 | Blast furnace coal powder injection Y shaped distributor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008201123511U CN201268705Y (en) | 2008-08-26 | 2008-08-26 | Blast furnace coal powder injection Y shaped distributor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201268705Y true CN201268705Y (en) | 2009-07-08 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2008201123511U Expired - Fee Related CN201268705Y (en) | 2008-08-26 | 2008-08-26 | Blast furnace coal powder injection Y shaped distributor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201268705Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108072720A (en) * | 2016-11-11 | 2018-05-25 | 成都青山利康药业有限公司 | A kind of device for keeping sample injection bottle cleaning dry |
| CN110575746A (en) * | 2019-10-10 | 2019-12-17 | 路超 | integrated high-molecular dry-method denitration agent conveying equipment and method |
-
2008
- 2008-08-26 CN CNU2008201123511U patent/CN201268705Y/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108072720A (en) * | 2016-11-11 | 2018-05-25 | 成都青山利康药业有限公司 | A kind of device for keeping sample injection bottle cleaning dry |
| CN110575746A (en) * | 2019-10-10 | 2019-12-17 | 路超 | integrated high-molecular dry-method denitration agent conveying equipment and method |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20090708 Termination date: 20110826 |