CN1264613C - Dry grading method of powdered coal and its equipment - Google Patents
Dry grading method of powdered coal and its equipment Download PDFInfo
- Publication number
- CN1264613C CN1264613C CN 200410041617 CN200410041617A CN1264613C CN 1264613 C CN1264613 C CN 1264613C CN 200410041617 CN200410041617 CN 200410041617 CN 200410041617 A CN200410041617 A CN 200410041617A CN 1264613 C CN1264613 C CN 1264613C
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- Prior art keywords
- dispersion plate
- air
- storehouse
- fine coal
- classification
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- 239000003245 coal Substances 0.000 title claims abstract description 23
- 238000000034 method Methods 0.000 title claims abstract description 20
- 239000006185 dispersion Substances 0.000 claims abstract description 41
- 239000000463 material Substances 0.000 claims abstract description 35
- 239000000428 dust Substances 0.000 claims abstract description 33
- 230000001105 regulatory effect Effects 0.000 claims abstract description 6
- 230000001939 inductive effect Effects 0.000 claims description 23
- 239000008187 granular material Substances 0.000 claims description 20
- 238000010332 dry classification Methods 0.000 claims description 19
- 238000007664 blowing Methods 0.000 claims description 4
- 238000007789 sealing Methods 0.000 claims description 2
- 230000000694 effects Effects 0.000 abstract description 13
- 239000002245 particle Substances 0.000 abstract description 9
- 238000012216 screening Methods 0.000 abstract description 4
- 239000010419 fine particle Substances 0.000 abstract description 2
- 230000002349 favourable effect Effects 0.000 abstract 1
- 230000005484 gravity Effects 0.000 abstract 1
- 235000011868 grain product Nutrition 0.000 description 4
- 238000005265 energy consumption Methods 0.000 description 3
- 239000000203 mixture Substances 0.000 description 3
- 239000011148 porous material Substances 0.000 description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 238000005192 partition Methods 0.000 description 2
- 238000007873 sieving Methods 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 238000000151 deposition Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 238000002224 dissection Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000002708 enhancing effect Effects 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 238000005243 fluidization Methods 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 238000010333 wet classification Methods 0.000 description 1
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- Combined Means For Separation Of Solids (AREA)
- Cyclones (AREA)
Abstract
The present invention relates to a method and apparatus for classifying powdered coal in a dry method, which is most suitable for classifying fine particles of powdered coal or dispersed particle materials. The present invention uses a vertical classifying bunker and a cyclone dust collector, wherein a dispersion plate is arranged inside the vertical classifying bunker, and a horizontal air inlet and an air exhausting outlet are arranged at the front part and the rear part of the dispersion plate; materials fall onto the dispersion plate by means of gravity inside the enclosed classifying bunker, and are fully dispersed and primarily classified in the process of falling onto the dispersion plate and under the action of probability screening of the dispersion plate; after dispersed, the materials come under the action of a cross airflow in the process of continuing falling, and materials with different grain diameters have different deviations, so that classification is realized. The apparatus can obtain products in three particle grades which are large, medium and small, and the products can be arbitrarily combined into two products. The classification particle sizes of the present invention can be arbitrarily regulated in a range of 0.5 to 6mm, and the integral apparatus with negative pressure inside is in a closed cycle and has no dust pollution. The present invention has the advantages of compact and reasonable structure, low cost, simple operation, favorable classification effect, high classification ratio and wide practicality.
Description
One, technical field
The present invention relates to fine coal dry classification method and equipment, be particularly useful for coal or bulk granular material are carried out fine grading, also be applicable to the fine grading of bulk granular materials such as iron ore, copper mine.
Two, background technology
Bulk granular material is carried out classification mainly contain two classes: a class is to adopt sieving machine that material is carried out classification, and as various vibratory sieve, this class screening machine reduces the classification efficiency of sieving machine because moist material is caused sieve pore blockade easily; Another kind of is wind-force or hydraulic classiciation, and hydraulic classiciation belongs to wet classification, on using certain limitation is arranged.In recent years, enhancing along with people's environmental consciousness, air classification demonstrates the characteristics in the epoch of complying with gradually, and obtain significant progress and also developed many grading plants, mainly contain two classes: a class is an inertia force method grading plant, the action of centrifugal force of promptly utilizing air-flow or machinery to produce is fully disperseed bulk granular material, and makes stock grading under the effect of wind-force.Another kind of is the fluid bed partition method, promptly utilizes the air-flow effect to make bulk granular material be fluidization and classification, separation of material under the effect of mechanical force.At present, utilize different principle and the dry classification equipment that designs respectively has its characteristics, and can both reach certain effect, but exist some problems, if any grader classification efficiency height, disposal ability is big, but the equipment bulky complex, safeguard inconvenience, excessive with air quantity, the energy consumption height; Though the grader volume that has is little, simple in structure, disposal ability is little, and effectiveness of classification is low.
Three, summary of the invention
Problem in view of prior art exists the purpose of this invention is to provide a kind of sieve pore blockade of avoiding, and energy consumption is low, and is simple in structure, fine coal dry classification method and equipment that effectiveness of classification is high.
Fine coal dry classification method of the present invention, the closed circulatory system that employing is made up of vertical staged storehouse cyclone dust collectors and centrifugal blower, make internal system form negative pressure, the feeding mouth of bulk granular material from vertical staged storehouse injected, the bulk granular material free-falling, the bulk granular material that falls falls on the dispersion plate that is provided with in the classification storehouse and scatters, when material disperses, by centrifugal blower the material after disperseing is carried out cross blowing and air inducing, realize the thick of material, in, thin grading, crosswind force is blown over from the place ahead of dispersion plate, enter the air inducing chamber that is located at the dispersion plate rear portion, enter cyclone dust collectors by the dust passage again, enter the induced duct that is connected with centrifugal blower again and circulate successively; Can the one or many classification be set at vertical direction.
The equipment that fine coal dry classification method of the present invention is adopted, it comprises frame, centrifugal blower, frame is provided with vertical staged storehouse and the cyclone dust collectors that ventilate mutually with vertical staged storehouse, top, vertical staged storehouse is provided with pan feeding control lock, and the front portion is provided with inlet air plenum, and the rear portion is provided with the air inducing chamber, at least be provided with a dispersion plate in the storehouse, the lower horizontal direction of dispersion plate is provided with an air inlet at least; The dividing plate of air inducing chamber is provided with a plurality of air-vents, and top, air inducing chamber connects the dust passage of cyclone dust collectors, and vertical staged storehouse and cyclone dust collectors bottom are provided with products export control lock.Described dispersion plate is located at the below of the pan feeding control lock of top, vertical staged storehouse setting.Described dispersion plate can be a plurality of, and dispersion plate is worn the rod that connects together by two row's intersections with relative motion and formed; The top of bottom, vertical staged storehouse two-step product outlet is provided with the adjuster of regulating the two-step product ratio; Adjuster by dividing plate with dividing plate mutually the spanner of interlock form; The pan feeding control lock in vertical staged storehouse, products export control lock and deduster products export control lock are formed by weighted lever and gate; Air inlet and air-vent can be provided with one or more, and each air inlet and air-vent place are equipped with volume control damper.
A kind of fine coal dry classification method of the present invention and equipment, be best suited for the fine grading of fine coal or bulk granular material, the closed circulatory system that employing is made up of vertical staged storehouse cyclone dust collectors and centrifugal blower, be provided with dispersion plate in the vertical staged storehouse, the front and rear part of dispersion plate is provided with horizontal air inlet and air-vent, the feeding mouth of bulk granular material from vertical staged storehouse injected, the bulk granular material that causes to fall and break falls on the dispersion plate that is provided with in the classification storehouse and scatters, by dispersion plate fall with the probability screening effect after, by centrifugal blower the material after disperseing is carried out cross blowing and air inducing, material after the dispersion is subjected to cross-flow effect in continuing dropping process, make the material of different-grain diameter produce different skews, realize the thick of material, in, thin grading, and can be merged into two products arbitrarily.Partition size can be regulated arbitrarily in 0.5～6mm scope, the entire equipment closed circulation, and device interior is a negative pressure, no dust pollution.Its compact conformation is reasonable, can not cause sieve pore blockade, and energy consumption is low, and cost is low, and is easy and simple to handle, and grading effect is good, and classification rate height has practicality widely.
Four, description of drawings
Fig. 1 is a structural representation of the present invention.
Fig. 2 is the A-A cutaway view of Fig. 1.
Among the figure: 1-frame, the vertical staged storehouse of 2-, 3-discharge seal control valve, the 4-centrifugal blower, 5-discharge seal control valve, 6-induced duct, the 7-cyclone dust collectors, 8-dust passage, 9-blast pipe, the 10-inlet air plenum, 11-air inlet, 12-pan feeding control lock, the 13-dispersion plate, the 14-air-vent, 15-air inducing chamber, 16-adjuster.
Five, the specific embodiment
Below in conjunction with accompanying drawing one embodiment of the present of invention are further described:
A kind of fine coal dry classification method of the present invention, employing is by vertical staged storehouse 2, the closed circulatory system that cyclone dust collectors 7 and centrifugal blower 4 are formed, make device interior form negative pressure, the feeding mouth of bulk granular material from vertical staged storehouse 2 injected, the bulk granular material free-falling, the bulk granular material that falls is through being located at bump and the screening on the dispersion plate 13 in the vertical staged storehouse 2, material is fully disperseed, when material disperses, carry out cross blowing and air inducing by the material after 4 pairs of dispersions of centrifugal blower, realize the coarse fraction product a of material, middle grade product b, the classification of fine fraction product c, crosswind force is blown over from the place ahead of dispersion plate 13, enters the air inducing chamber 15 that is located at dispersion plate 13 rear portions, enters cyclone dust collectors 7 by dust passage 8 again, enter the induced duct 6 that is connected with centrifugal blower 4 again, successively circulation.Overall structure is vertically placed, and a plurality of dispersion plates 13 and a plurality of horizontal inlet and outlet by being provided with can carry out the one or many classification at vertical direction.
The equipment that fine coal dry classification method of the present invention is adopted, it is mainly by frame 1, centrifugal blower 4, vertical staged storehouse 2 that is provided with on the frame 1 and cyclone dust collectors 7 compositions that ventilate mutually with vertical staged storehouse 2, the top in vertical staged storehouse 2 is provided with pan feeding control lock 12, the front portion is provided with inlet air plenum 10, the rear portion is provided with air inducing chamber 15, be provided with two dispersion plates 13 in the storehouse, dispersion plate 13 is located at the below of the pan feeding control lock 12 of 2 tops, classification storehouse setting, dispersion plate 13 is worn the rod that connects together by two row's intersections with relative motion and form adjusting between dispersion plate 13 can be appointed in 0 °～90 ° scope.The lower horizontal direction of each dispersion plate 13 is equipped with two air inlets 11, and the dividing plate of the air inducing chamber 15 relative with air inlet 11 is provided with a plurality of air-vents 14, and the place, air port of air inlet 11 and air inducing chamber 15 is equipped with the volume control damper of control air quantity size.15 tops, air inducing chamber connect the dust passage 8 of cyclone dust collectors 7, dust passage 8 connects cyclone dust collectors 7, by cyclone dust collectors 7 fine fraction product c is collected and discharges outside the cylindrical shell, cyclone dust collectors 7 bottoms are provided with the discharge seal control valve of being made up of weighted lever and gate 5; The bottom in vertical staged storehouse 2 is provided with the discharge seal control valve 3 of the outlet of coarse grain product a, middle coarse grain product b by weighted lever and gate composition, makes the wind-force circulating effect that enters in vertical staged storehouse 2 and the cyclone dust collectors 7 good by discharge sealing regulating gate 3 and 5.The adjuster 16 of regulating the two-step product ratio is equipped with in the top of vertical staged storehouse 2 bottom two-step product coarse grain product a, middle coarse grain product b outlet, adjuster 16 by dividing plate with dividing plate mutually the spanner of interlock form, can effectively regulate the product particle size requirement.
The course of work: air is entered in the vertical staged storehouse 2 by each air intake control valve by inlet air plenum 10, and in classification storehouse 2, form many places wind-force high velocity jet band, when bulk granular material is entered in the classification storehouse 2 by classification storehouse 2 pan feeding seal control valves 12, and free-falling in classification storehouse 2, through dispersion plate 13 time, be subjected to bump and probability hierarchical effect, material is fully disperseed, when the material after disperseing falls through high rapid fire band, fine is subjected to cross-flow impetus, carried by air-vent 14 by air-flow and to enter air inducing chamber 15, be equipped with the air inducing control valve of control air quantity on each air-vent 14; The coarse fraction material under cross-flow effect, is parabolic motion by the high velocity jet band time, realize separating; Middle grade material drops into down on one deck dispersion plate 13, and material between the particle, constantly collides between particle and the dispersion plate 13 in continuing the process that falls mutually, and the small particles material that adheres to particle surface is come off.After material skids off from lower floor's dispersion plate 13, pass through the high velocity jet band again, carry out the classification second time.Can use the one or many classification, to reach good grading effect according to a degree composition situation of material.Coarse fraction material through being left after the classification several times in classification storehouse 2 is then by discharging in the discharge seal control valve 3 of 2 bottoms, classification storehouse; Carried the fine particle stage material that enters air inducing chamber 15 by crossflow and enter cyclone dust collectors 7 depositing dusts by dust passage 8, the fine fraction product c that dirt falls in deduster 7 discharges from discharge seal control valve 5, and the pure air after the dedusting is sent inlet air plenum back to again by blower fan.
When the free moisture of material is higher, rely on the dissection of rod on the dispersion plate 13 can disperse agglomerate effectively; Collision between particle and the dispersion plate can make to stick to the lip-deep most of fine of coarse granule and come off; When material entered the high velocity jet band, the fine grained that comes off from the coarse granule surface was carried through the air inducing control valve and enters air inducing chamber 15 under cross-flow effect, made the higher material of free moisture also obtain effective classification like this.
Claims (10)
1. fine coal dry classification method, employing is by vertical staged storehouse (2), the system that cyclone dust collectors (7) and centrifugal blower (4) are formed, with crossflow the material after loose is carried out classification, and dust is introduced cyclone dust collectors (7) by air inducing chamber (15), it is characterized in that: the whole system sealing is connected, make internal system form negative pressure, the feeding mouth of bulk granular material from vertical staged storehouse (2) injected, the bulk granular material free-falling, the bulk granular material that falls falls on the dispersion plate (13) that is provided with in the classification storehouse and scatters, when material disperses, by centrifugal blower (4) material after disperseing is carried out cross blowing and air inducing, realize thick (a) of material, in (b), carefully (c) grading, the air-flow after the dedusting enter the induced duct (6) that is connected with centrifugal blower (4) again, successively circulation.
2. fine coal dry classification method according to claim 1 is characterized in that: can the one or many classification be set at vertical direction.
3. the equipment that fine coal dry classification method according to claim 1 is adopted, it comprises frame (1), centrifugal blower (4), it is characterized in that: frame (1) is provided with vertical staged storehouse (2) and the cyclone dust collectors (7) that ventilate mutually with vertical staged storehouse (2), top, vertical staged storehouse (2) is provided with pan feeding control lock (12), the front portion is provided with inlet air plenum (10), the rear portion is provided with air inducing chamber (15), at least be provided with a dispersion plate (13) in the storehouse, the lower horizontal direction of dispersion plate (13) is provided with an air inlet (11) at least; The dividing plate of air inducing chamber (15) is provided with a plurality of air-vents (14), and top, air inducing chamber (15) connects the dust passage (8) of cyclone dust collectors (7), and vertical staged storehouse (2) and cyclone dust collectors (7) bottom is provided with products export control lock (3,5).
4. fine coal dry classification equipment according to claim 3 is characterized in that: described dispersion plate (13) is located at the below of the pan feeding control lock (12) of top, vertical staged storehouse (2) setting.
5. according to claim 3 or 4 described fine coal dry classification equipment, it is characterized in that: described dispersion plate (13) can be a plurality of.
6. according to claim 3 or 4 described fine coal dry classification equipment, it is characterized in that: described dispersion plate (13) is worn the rod that connects together by two row's intersections with relative motion and is formed.
7. fine coal dry classification equipment according to claim 3 is characterized in that: the top of bottom, described vertical staged storehouse (2) two-step product outlet is provided with the adjuster (16) of regulating the two-step product ratio.
8. fine coal dry classification equipment according to claim 7 is characterized in that: described adjuster (16) by dividing plate with dividing plate mutually the spanner of interlock form.
9. according to claim 3 or 7 described fine coal dry classification equipment, it is characterized in that: pan feeding control lock (12), products export control lock (3) and deduster (7) the products export control lock (5) in described vertical staged storehouse (2) are formed by weighted lever and gate.
10. fine coal dry classification equipment according to claim 3 is characterized in that: described air inlet (11) and air-vent (14) can be provided with one or more, and each air inlet (11) and air-vent (14) locate to be equipped with volume control damper.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200410041617 CN1264613C (en) | 2004-08-02 | 2004-08-02 | Dry grading method of powdered coal and its equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200410041617 CN1264613C (en) | 2004-08-02 | 2004-08-02 | Dry grading method of powdered coal and its equipment |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1597147A CN1597147A (en) | 2005-03-23 |
| CN1264613C true CN1264613C (en) | 2006-07-19 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200410041617 Expired - Fee Related CN1264613C (en) | 2004-08-02 | 2004-08-02 | Dry grading method of powdered coal and its equipment |
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| CN102784757B (en) * | 2012-07-27 | 2014-05-07 | 安徽理工大学 | Efficient airflow classification fine-coal remover for power coal before selecting |
| CN104437909B (en) * | 2014-12-08 | 2017-02-22 | 中国华电集团科学技术研究总院有限公司 | Dry-process pulsed cyclone separation device and separation method for fine materials |
| CN105289985B (en) * | 2015-11-20 | 2017-05-24 | 中国矿业大学 | Full-fraction dry method separation clean technology and method for coal |
| CN107262375A (en) * | 2016-04-06 | 2017-10-20 | 中国铁建重工集团有限公司 | One kind is gathered materials recovery system, recovery method and sand equipment processed |
| CN106269506A (en) * | 2016-08-23 | 2017-01-04 | 泰州市重整催化技术服务有限公司 | A kind of reforming catalyst negative pressure fluidised form wind-transformation vehicle type physical fractionation device |
| CN107716301A (en) * | 2017-11-29 | 2018-02-23 | 阳泉中创陶粒有限公司 | A kind of pneumatic separation device for reducing foundry sand clay content |
| CN109226200A (en) * | 2018-10-17 | 2019-01-18 | 王智先 | House refuse compound efficient sorting system |
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| CN112044776A (en) * | 2020-09-01 | 2020-12-08 | 许婷婷 | Industrial raw material grading dust removal circulating device |
| CN112044764A (en) * | 2020-09-01 | 2020-12-08 | 许婷婷 | Industrial raw material grading dust removal device |
| CN113058853A (en) * | 2021-05-18 | 2021-07-02 | 王泽东 | Fine grain wind screen |
| CN114405822A (en) * | 2022-01-17 | 2022-04-29 | 东南大学 | Oxygen carrier/coal coke directional separation device suitable for high-flux coal chemical looping combustion |
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2004
- 2004-08-02 CN CN 200410041617 patent/CN1264613C/en not_active Expired - Fee Related
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| CN1597147A (en) | 2005-03-23 |
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