CN101850293B - Coarse coal slime sorting and grading plant for desliming type liquid-solid fluid bed - Google Patents
Coarse coal slime sorting and grading plant for desliming type liquid-solid fluid bed Download PDFInfo
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- CN101850293B CN101850293B CN 201010161063 CN201010161063A CN101850293B CN 101850293 B CN101850293 B CN 101850293B CN 201010161063 CN201010161063 CN 201010161063 CN 201010161063 A CN201010161063 A CN 201010161063A CN 101850293 B CN101850293 B CN 101850293B
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- 239000003245 coal Substances 0.000 title claims abstract description 68
- 239000012530 fluid Substances 0.000 title claims abstract description 29
- 239000007787 solid Substances 0.000 title claims abstract description 18
- 239000007788 liquid Substances 0.000 claims abstract description 4
- 238000009826 distribution Methods 0.000 claims description 3
- 239000000463 material Substances 0.000 abstract description 16
- 230000000694 effects Effects 0.000 abstract description 11
- 230000002708 enhancing effect Effects 0.000 abstract 1
- 239000002956 ash Substances 0.000 description 23
- 230000005484 gravity Effects 0.000 description 6
- 238000004062 sedimentation Methods 0.000 description 6
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 6
- 238000000034 method Methods 0.000 description 5
- 238000000926 separation method Methods 0.000 description 5
- 238000005188 flotation Methods 0.000 description 4
- 230000007812 deficiency Effects 0.000 description 3
- 238000002360 preparation method Methods 0.000 description 3
- 230000001174 ascending effect Effects 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 2
- 239000010883 coal ash Substances 0.000 description 2
- 239000012141 concentrate Substances 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 239000002245 particle Substances 0.000 description 2
- 230000002093 peripheral effect Effects 0.000 description 2
- 230000001105 regulatory effect Effects 0.000 description 2
- 235000002918 Fraxinus excelsior Nutrition 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000003139 buffering effect Effects 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 239000003250 coal slurry Substances 0.000 description 1
- 230000001276 controlling effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 238000005243 fluidization Methods 0.000 description 1
- 239000008187 granular material Substances 0.000 description 1
- 238000009776 industrial production Methods 0.000 description 1
- 238000011177 media preparation Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
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Abstract
The invention relates to a coarse coal slime sorting and grading plant for a desliming type liquid-solid fluid bed, which comprises a sorting and grading barrel body and a liquid distributor, wherein the sorting and grading barrel body is composed of an upper barrel body, a lower barrel body and a base cone; the liquid distributor is arranged on the upper part of the base cone; a clean coal overflow trough is arranged on the upper part of the upper barrel; and the inner part of the upper barrel is provided with a feed sleeve and a feed hopper communicated with the feed sleeve.. The invention is characterized in that a clean coal overflow desliming collecting tank is arranged outside the clean coal overflow trough; a feed desliming device is arranged on the feed hopper; the clean coal overflow desliming collecting tank is provided with a feed and overflow desliming mixed discharge port; the feed and overflow desliming mixed discharge port is provided with a desliming pipe which is connected with the overflow port of the feed desliming device; a densimeter and an underflow regulator, which are connected with a density controller, are arranged in the sorting and grading barrel body; and the discharge port of the clean coal overflow trough is provided with a clean coal discharge valve for controlling the desliming quantity. High-ash fine-slime materials in the fed material can be directly discharged from the overflow, thereby reducing the influence of fine slime on the sorting effect, reducing high-ash fine-slime pollution in the overflow of the coarse coal slime sorter for liquid-solid fluid beds, and enhancing the sorting effect.
Description
Technical field
The present invention relates to a kind of slime separation classification technique, especially a kind of desliming type liquid-solid fluid bed coarse slime size classification grading device.
Background technology
The technique that most of coal preparation techniques adopt stepless gravity treatment to combine with flotation, take off not desliming before no matter being selected in, the sorting granularity boundary of gravity treatment and flotation is 0.5mm, in fact since the characteristics of two kinds of method for separating itself so that near the coal grain separating effect 0.5mm is relatively poor, and this part coal grain (referring generally to 3-0.25mm) GB (GB/T 7186-1998) is defined as coarse slime.And this part particle generally reclaims separately by high-frequency screen in coal preparation plant, and its ash content is between cleaned coal and middle coal, and generally than the high 2-5% of cleans ash, the final whereabouts of its product is difficult to determine.At present its sorting of general tree, majority mixes cleaned coal with its part, and its prerequisite is that gravity treatment and floatation clean coal ash content must be lower than the final sales cleans ash, i.e. gravity treatment and flotation back of the body coarse slime ash content, another part mixes middle coal.Along with the development in epoch and the demand of society, current coal market requires more and more stricter to the ash content of coal product, there is in recent years minority coal preparation plant to adopt heavily be situated between cyclone or spiral of minor diameter that coarse slime is carried out sorting, but because the deficiency of these two kinds of devices itself can't reach satisfied effect.Heavily the be situated between deficiency of cyclone of minor diameter: 1. too thin to the medium granularity requirements, medium preparation and reclaim difficulty, and cost is high; 2. require pressure high to pan feeding, equipment attrition is serious, and power consumption is large; Although 3. its sorting granularity lower limit is lower, thinner stock grading efficient is low, and a part does not enter cleaned coal through the fine coal slurry of sorting, affects cleans ash, and it can not replace flotation fully simultaneously.The deficiency of spiral: 1. separating density is high, and cleaned coal can not reach the cleans ash of final requirement, and its product can not be sold as final products; 2. the separate unit treating capacity is little, needs many and is used, and floor space is large, and is highly large, needs simultaneously to size mixing and distributor, and distributing uniformity is difficult to control; 3. strict to the pan feeding concentration requirement, be difficult to control on the industrial production.
Fluidization technology on the chemical industry is incorporated into Concentrating Field, has obtained good effect.Patent ZL 200720037745.0 disclosed liquid-solid fluid bed coarse slime size graders provide a kind of liquid-solid fluid bed coarse slime size device that utilizes coarse slime self can reduce again the coarse slime ash content as medium.Main this relation relevant with the density of particle of sinking speed makes material carry out sorting in the fluidizing agent that self forms when utilizing narrow grade material to be interfered sedimentation.But because the characteristics of liquid-solid fluid bed coarse slime size machine grading principle, cause in the pan feeding the thin mud of high ash seriously polluted to cleaned coal, even employing comprises the desliming devices such as cyclone, high-frequency screen and coal slime centrifuge adopt the desliming of classification eddy flow and choosing before pan feeding after, still there is the thin mud of the high ash of a part in the final cleaned coal, affects separating effect.
Summary of the invention
Technical problem: the objective of the invention is to overcome the weak point that exists in the prior art, a kind of desliming type liquid-solid fluid bed coarse slime size classification grading device is provided, coarse slime supplied materials pre-classification is concentrated, and carry out the sedimentation desliming in liquid-solid fluid bed coarse slime size machine overflow outlet, reduce the thin sludge-polluted of high ash in the overflow of liquid-solid fluid bed coarse slime size machine, thus realize improving total cleaned coal productive rate, reduce total cleans ash, improve the quality of products and the coal resources comprehensive utilization ratio.
Technical scheme: desliming type liquid-solid fluid bed coarse slime size classification grading device of the present invention, comprise by upper barrel body, lower barrel body, the sorting classifying staving that base cone consists of, be located at the liquid distribution trough of base cone top, the top of upper barrel body is provided with the cleaned coal overflow launder, inside is provided with the pan feeding sleeve, the feed hopper that is connected with the pan feeding sleeve, be provided with cleaned coal overflow desliming feeder in the outside of described cleaned coal overflow launder, feed hopper is provided with feed desliming device, cleaned coal overflow desliming feeder is provided with pan feeding and overflow desliming mixing discharge gate, and pan feeding is provided with the desliming pipe that is connected with feed desliming device overfall with overflow desliming mixing discharge gate; Be provided with the densitometer and the underflow adjusting device that link to each other with density controller in the sorting classifying staving, the exit of described cleaned coal overflow launder is provided with the cleaned coal blow-off valve of control desliming amount.
Described underflow adjusting device comprises motorized adjustment executing agency, wedge shape mine tailing valve, is connected with connecting rod between motorized adjustment executing agency and the wedge shape mine tailing valve, and connecting rod is provided with the distance adjustment pipe; Described base cone outlet side is provided with the bypass pipe by draw valve control; Described feed desliming device is feed cyclowass or desliming bucket.
Beneficial effect:
1, can make the thin mud material of high ash in the pan feeding directly discharge and do not enter separation system from overflow, reduce thin mud to the impact of separating effect, the effect that play buffering supplied materials, even feeding, tentatively reduces the coarse slime ash content, improves pan feeding concentration and disposal ability.
2, further reduced the thin sludge-polluted of high ash in the overflow of liquid-solid fluid bed coarse slime size machine, and simplified the follow-up desliming dewatering process of sorting, reduce cleans ash after the choosing, reduce the thin mud of high ash to the pollution of cleaned coal, improve separating effect.
3, adopt density controller can realize that bed density or separating density are substantially even, realize automatically regulating, improving sharpness of separation; The underflow valve of pan feeding sedimentation sloughing-off tank and cleaned coal overflow sedimentation sloughing-off tank also can be realized automatic control simultaneously, improves the desliming effect.
4. can realize high accuracy sorting under the low-density, cleans ash is subjected to thin sludge-polluted still less, and cleans ash can be lower, and the pan feeding ash content is 25% when following, after the sorting cleans ash and gravity treatment and floatation clean coal ash content quite or lower, clean coal yield is higher.
Description of drawings
Fig. 1 is structural representation of the present invention.
Fig. 2 is feed cyclowass structural representation of the present invention.
Fig. 3 is desliming bucket structure schematic diagram of the present invention.
Fig. 4 is fluid distributor structural representation of the present invention.
Among the figure: 1-feed cyclowass or desliming bucket, 2-feed hopper, 3-pan feeding scalping plate, 4-cleaned coal overflow desliming feeder, 5-cleaned coal overflow launder, 6-connecting rod, 7-underflow adjusting device, 8-pan feeding sleeve, 9-rectangle cleaned coal overflow launder, 10-density controller, 11-densitometer, 12-upper barrel body, the 13-flange, 14-lower barrel body, 15-fluid distributor, the 16-base cone, 17-mine tailing valve, 18-draw valve, 19-cleaned coal blow-off valve, 20-pan feeding and overflow desliming mixing discharge gate, 21-desliming pipe.
The specific embodiment
Below in conjunction with accompanying drawing embodiments of the invention are further described:
Shown in Figure 1, separation of coarse slime grading plant of the present invention mainly is made of sorting classifying staving, feeding device, feed desliming device 1, overflow desliming device, density controller 10, underflow adjusting device and fluid distributor 15.The sorting classifying staving is made of upper barrel body 12, lower barrel body 14, base cone 16, and upper barrel body 12 and lower barrel body 14 are connected as a single entity by flange 13.Feeding device is made of pan feeding sleeve 8 and the feed hopper 2 that pan feeding scalping plate 3 is installed; The top outer race of upper barrel body 12 is equipped with cleaned coal overflow launder 5, the tilting coniform annular groove in bottom that cleaned coal overflow launder 5 is big up and small down, and the exit of cleaned coal overflow launder 5 is provided with the cleaned coal blow-off valve 19 of control desliming amount.Upper barrel body 12 interior central upper are provided with pan feeding sleeve 8, the outer cover of cleaned coal overflow launder 5 is equipped with cleaned coal overflow desliming feeder 4, be set with the tilting rectangle concentrate overflow launder 9 that communicates with concentrate overflow desliming feeder 4 in bottom at upper barrel body 12 tops, can increase the area of downflow weir, improve cleaned coal and overflow speed.The feed hopper 2 that is connected with pan feeding sleeve 8 is set on the cleaned coal overflow desliming feeder 4, and the side of pan feeding sleeve 8 is provided with the feeding pipe that is 90 ° of bendings with feed hopper 2 flange connects.Feed hopper 2 is provided with feed desliming device 1, feed desliming device 1 can adopt the feed cyclowass of pressure, also can adopt the desliming bucket of with no pressure, the feed cyclowass mainly is made of feed pipe, underflow pipe and the overfall that links to each other with desliming pipe 21, its underflow pipe inserts in the feed hopper 2, and is shown in Figure 2; The overflow tube seat formation that the desliming bucket mainly contains feed pipe, desliming bucket underflow valve, underflow pipe and links to each other with desliming pipe 21, shown in Figure 3.The bottom sides of cleaned coal overflow desliming feeder 4 is provided with pan feeding and overflow desliming mixing discharge gate 20, and pan feeding is provided with the desliming pipe 21 that is connected with feed desliming device 1 overfall with overflow desliming mixing discharge gate 20; Be provided with the densitometer 11 and the underflow adjusting device 7 that link to each other with density controller 10 in the sorting classifying staving, underflow adjusting device 7 comprises motorized adjustment executing agency, wedge shape mine tailing valve 17, be connected with connecting rod 6 between motorized adjustment executing agency and the wedge shape mine tailing valve 17, connecting rod 6 is provided with the distance adjustment pipe.Be provided with the fluid distributor 15 that communicates with outer connecting pipe in the lower barrel body 14, fluid distributor 15 adopts the multitube distributor of annular, shown in Fig. 4 (a), or the rectangle multitube distributor of lateral flow type, shown in Fig. 4 (b); Fluid distributor 15 bottoms are provided with the base cone 16 that connects lower barrel body 14, wedge shape mine tailing valve 17 valve bodies are taper, be located at base cone 16 exits, with the discharging opening phase wedging of base cone 16, by realized the switching of wedge shape mine tailing valve 17 by the motorized adjustment executing agency pulling connecting rod 6 of density controller 10 controls; Base cone 16 outlet sides are provided with the bypass pipe 18 by draw valve control, so that the cleaning of mine tailing.
The course of work: when feed had certain steady pressure, feed desliming device 1 adopted the feed cyclowass, otherwise adopted the desliming bucket of sedimentation.Material is first-selected through feed desliming device 1, because the effect of hindered falling (aperture of the underflow valve bottom control sedimentation desliming bucket) or feed cyclowass centrifugal cyclone, impel the most of water in the thin mud material of those high ashes and the feed to slowly rise to the top of settlement funnel or the overflow of cyclowass, the desliming that realizes material is concentrated, coarse granule drops to the bottom, feed pipe by 90 ° of elbows of feed hopper 2 bands evenly enters in the pan feeding sleeve 8 along tangent line, move downward to the feed barrel bottom by gravity, enter in the liquid-solid fluid bed separation classification staving.After entering into material in the sorting classifying staving and progressively moving downward certain distance, material begins to separate by the height of density, low-density moves upward and enters cleaned coal overflow launder 5 by peripheral overflow weir or rectangle cleaned coal overflow launder 9, owing to be installed in the discharge rate size of the cleaned coal blow-off valve 19 control cleaned coal of cleaned coal overflow launder 5 bottoms, be up big and down small coniform by the character of cleaned coal overflow launder 5, the thin mud of liquid-solid fluid bed coarse slime size Grading Overflow and most of water enter into cleaned coal overflow desliming feeder 4 through the peripheral overflow weir on cleaned coal overflow launder 5 tops, desliming and the inspissation of liquid-solid fluid bed coarse slime size classifier overflow have been realized, the discharge pipe of cleaned coal overflow desliming feeder 4 bottoms communicates with the overflow pipe 21 of feed desliming device, compiles the thin mud that rear conduct deviates from and enters other operation.The product that cleaned coal blow-off valve 19 control cleaned coal through being positioned at cleaned coal overflow launder 5 bottoms are discharged is as qualified head coal product.The higher density material continues to move downward the fluid bed bed, the material that density is higher than fluid bed bed density passes bed and enters into the bottom, automatically mine tailing valve 17 discharges of controlling by underflow become mine tailing, and the material of intermediate density in fluidized-bed layer through moving back and forth up and down, after after a while, progressively realize separating.The formation of fluidized-bed layer is that middle-high density material in the pan feeding is as medium, take through the ascending water of coming in the fluid distributor 15 as fluid, form the fluid bed bed, and ascending water is to utilize pump to enter in the cylinder through water-main 15-2, branching pipe 15-3, water distribution allotment pipe 15-4 and distributor pipe cap 15-5 along continuous straight runs from water inlet control valve 15-1,15-6, becomes upwelling upwards again.The control of whole assorting room is to realize automatically regulating and cleans ash control by the automatic control system that is comprised of density sensor 11, density controller 10 and mine tailing valve 17.
Claims (2)
1. desliming type liquid-solid fluid bed coarse slime size classification grading device, comprise by upper barrel body (12), lower barrel body (14), the sorting classifying staving that base cone (16) consists of, be located at the liquid distribution trough (15) of base cone (16) top, the top of upper barrel body (12) is provided with cleaned coal overflow launder (5), inside is provided with pan feeding sleeve (8), the feed hopper (2) that is connected with pan feeding sleeve (8), the exit of described cleaned coal overflow launder (5) is provided with the cleaned coal blow-off valve (19) of control desliming amount, be provided with cleaned coal overflow desliming feeder (4) in the outside of described cleaned coal overflow launder (5), cleaned coal overflow desliming feeder (4) is provided with pan feeding and overflow desliming mixing discharge gate (20), and pan feeding is provided with the desliming pipe (21) that is connected with feed desliming device (1) overfall with overflow desliming mixing discharge gate (20); It is characterized in that: feed hopper (2) is provided with feed desliming device (1), be provided with the densitometer (11) and the underflow adjusting device (7) that link to each other with density controller (10) in the sorting classifying staving, described underflow adjusting device (7) comprises motorized adjustment executing agency, wedge shape mine tailing valve (17), be connected with connecting rod (6) between motorized adjustment executing agency and the wedge shape mine tailing valve (17), connecting rod (6) is provided with the distance adjustment pipe; Described base cone (16) outlet side is provided with the bypass pipe (18) by draw valve control.
2. desliming type liquid-solid fluid bed coarse slime size classification grading device according to claim 1, it is characterized in that: described feed desliming device (1) is feed cyclowass or desliming bucket.
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| CN 201010161063 CN101850293B (en) | 2010-04-23 | 2010-04-23 | Coarse coal slime sorting and grading plant for desliming type liquid-solid fluid bed |
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| CN 201010161063 CN101850293B (en) | 2010-04-23 | 2010-04-23 | Coarse coal slime sorting and grading plant for desliming type liquid-solid fluid bed |
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| CN101850293B true CN101850293B (en) | 2013-02-13 |
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Families Citing this family (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102205263B (en) * | 2011-05-24 | 2013-04-24 | 中国矿业大学 | Coal slime classified concentration device |
| CN102327807B (en) * | 2011-09-21 | 2014-11-26 | 符世琛 | Three-product teetered bed separator |
| CN105435951A (en) * | 2015-12-22 | 2016-03-30 | 大同煤矿集团有限责任公司 | Coarse slime separation machine |
| CN106391292A (en) * | 2016-10-31 | 2017-02-15 | 中国矿业大学 | Liquid-solid fluidized bed sorting machine and material sorting method employing same |
| CN106694204B (en) * | 2017-01-13 | 2023-07-04 | 中国矿业大学 | Coarse slime separation overflow clean coal desliming grading device of liquid-solid fluidized bed |
| CN106669953B (en) * | 2017-01-13 | 2023-07-04 | 中国矿业大学 | Clay-removing type liquid-solid fluidized bed coarse slime separation overflow clean coal grading device |
| CN108435406B (en) * | 2018-04-04 | 2024-03-15 | 中国矿业大学 | Coarse slime sorting unit with stable fluidization environment |
| CN110433951A (en) * | 2019-08-20 | 2019-11-12 | 中国恩菲工程技术有限公司 | Fluidization screening installation based on bed of material position and bed layer pressure Collaborative Control |
| CN114713379B (en) * | 2021-07-22 | 2023-09-29 | 中国矿业大学 | Fluidized flotation device and method suitable for coarse particle recovery |
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| EP0508335A2 (en) * | 1991-04-09 | 1992-10-14 | Allmineral Aufbereitungstechnik Gmbh & Co. Kg | Device for seperating light materials from sand and gravel |
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| CN201052472Y (en) * | 2007-05-17 | 2008-04-30 | 中国矿业大学 | Liquid-solid fluid bed coarse slime size classification grading device |
| CN101502818A (en) * | 2009-03-05 | 2009-08-12 | 煤炭科学研究总院唐山研究院 | Integrated device for hydraulic classification and sorting of coarse slime as well as classification and sorting system |
| CN201304360Y (en) * | 2008-11-07 | 2009-09-09 | 符东旭 | Authigenic media mineral separator |
| CN201676741U (en) * | 2010-04-23 | 2010-12-22 | 中国矿业大学 | Desliming type liquid-solid fluidized bed coarse slime sorting and grading device |
-
2010
- 2010-04-23 CN CN 201010161063 patent/CN101850293B/en not_active Expired - Fee Related
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4282088A (en) * | 1980-03-03 | 1981-08-04 | Linatex Corporation Of America | Process for cleaning fine coal |
| EP0508335A2 (en) * | 1991-04-09 | 1992-10-14 | Allmineral Aufbereitungstechnik Gmbh & Co. Kg | Device for seperating light materials from sand and gravel |
| US6036028A (en) * | 1995-11-02 | 2000-03-14 | Allmineral Aufbereitungstechnik Gmbh & Co. Kg | Apparatus for separating off light materials from sand and gravel |
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