CN1005314B - Process and device for dressing coal with dry fluidized bed - Google Patents
Process and device for dressing coal with dry fluidized bed Download PDFInfo
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- CN1005314B CN1005314B CN87101056.9A CN87101056A CN1005314B CN 1005314 B CN1005314 B CN 1005314B CN 87101056 A CN87101056 A CN 87101056A CN 1005314 B CN1005314 B CN 1005314B
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- coal
- air
- housing
- scraper plate
- fluid bed
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- 239000003245 coal Substances 0.000 title claims abstract description 47
- 238000000034 method Methods 0.000 title claims abstract description 17
- 238000009826 distribution Methods 0.000 claims abstract description 28
- 238000005243 fluidization Methods 0.000 claims abstract description 10
- 239000012530 fluid Substances 0.000 claims description 28
- 238000007667 floating Methods 0.000 claims description 13
- 201000002282 venous insufficiency Diseases 0.000 claims description 13
- 239000004744 fabric Substances 0.000 claims description 7
- 238000004080 punching Methods 0.000 claims description 6
- 229910004298 SiO 2 Inorganic materials 0.000 claims description 4
- 239000011521 glass Substances 0.000 claims description 4
- 239000004579 marble Substances 0.000 claims description 4
- 238000009434 installation Methods 0.000 claims 1
- 230000000694 effects Effects 0.000 abstract description 6
- 239000000203 mixture Substances 0.000 abstract description 5
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract description 5
- 239000006004 Quartz sand Substances 0.000 abstract description 2
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 abstract description 2
- SZVJSHCCFOBDDC-UHFFFAOYSA-N iron(II,III) oxide Inorganic materials O=[Fe]O[Fe]O[Fe]=O SZVJSHCCFOBDDC-UHFFFAOYSA-N 0.000 abstract description 2
- 239000002245 particle Substances 0.000 abstract description 2
- 239000000843 powder Substances 0.000 abstract description 2
- 238000013329 compounding Methods 0.000 abstract 1
- 239000002002 slurry Substances 0.000 abstract 1
- 238000000926 separation method Methods 0.000 description 14
- 230000001404 mediated effect Effects 0.000 description 5
- 239000003795 chemical substances by application Substances 0.000 description 4
- 238000002474 experimental method Methods 0.000 description 4
- 239000000463 material Substances 0.000 description 3
- 229910000831 Steel Inorganic materials 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 2
- 239000000428 dust Substances 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000007787 solid Substances 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- 206010044565 Tremor Diseases 0.000 description 1
- 238000013459 approach Methods 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 230000002950 deficient Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 239000000945 filler Substances 0.000 description 1
- 239000008187 granular material Substances 0.000 description 1
- 239000006148 magnetic separator Substances 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 238000007790 scraping Methods 0.000 description 1
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- 238000012360 testing method Methods 0.000 description 1
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Abstract
The present invention discloses a novel device for dressing coal with a dry fluidized bed and a method thereof. The device and the method use the fluidized bed for dressing coal by designing a compounding, filling and division type wind distributing device [6] and adopting a method that multi-stage and small-size wind distributing devices are spliced into a large-size wind distributing device; the purpose of dressing coal is achieved by the reasonable selection of the weight percentage of particle size distribution and the fluidization number of a mixture of magnetite powder and quartz sand as heavy mediums. The present invention solves the problems of large water consumption, difficult slurry treatment, etc. of the current wet coal dressing; the present investment has the advantages of little investment and rapid effects and provides a new path for dressing coal.
Description
The present invention relates to a kind of dry fluidized bed method for separating and device that fluidization is applied to the coal separation process.
Existing coal separation method is to adopt wet split, and this method not only can cause the pollution of residue coal slime after the washing, and water consumption is big, investment is high.Ground such as the Shaanxi that is distributed in the severe drought lack of water more than 2/3rds of coal in China recoverable reserves, the Inner Mongol, Shanxi.Therefore press for a kind of novel dry separation technology and equipment.
Up to now, though abroad also set about the research of this problem, because the requirement of this dry separation technology and equipment has: higher continuity operating characteristic, good separating effect and the specific (special) requirements that does not have aspect such as environmental pollution.Need fluidized bed for separation performance in working continuously uniform and stable therefrom, the sharpness of separation height, production capacity is big, the pollution that can solve dust such as separating medium effectively simultaneously.
U.S. Pat 3367501 has proposed a kind of gas-solid fluidized bed coal separation experimental provision and sorting experimental technique.This fluid bed has the comb shape chain material scraper that part is positioned at hull outside, has the adjustable air compartment of cutting apart each other of air quantity, its sorting experimental technique is that granule materials is fed in the gas-solid fluidized bed of certain density, thus material is divided into the different weight product of proportion, and discharges fluid bed.But this patent only is a kind of bath scaled model experimental device and the experimental technique that has proposed dry separation, lays particular emphasis on grading principle.Because this device is only implemented initiatively discharge to floating thing (even to hypostasis), and what simultaneously hypostasis (even to floating thing) is utilized is that principle,displacement comes passive discharge in the chemical industry, so its actual production department reason ability is subjected to very big constraint.Improve disposal ability if increase discharge velocity with expectation, then inevitable since influence fluid bed evenly with stablize, and directly influence separating effect.In addition, this experimental provision is the de-mediated equipment synchronous with discharge not, no dust suppression etc., and owing to above-mentioned a series of reasons, this assorting room is restricted in actual applications.
Task of the present invention provides a kind of novel dressing coal with dry fluidized bed apparatus and method, produce actual from industrialness, systematically solve the discharge discontinuity that exists in the dressing coal with dry fluidized bed process, there is not the not good problem of medium apparatus and air-distribution device and method of operating that removes, to reach evenly, to stablize and continuous fluidized bed dry type sorting.
Task of the present invention is by having adopted annular anchor chain-scraper plate output device of being positioned at enclosure interior in device, be furnished with the two ends discharge device that removes medium, with glass marble as the air-distribution device that is positioned at lower housing portion of filler and cycle charging gear and by employing force discharge, most of dense media is in separation chamber's closed cycle and adopt methods of operating such as rational medium kind, granularity, granularmetric composition and fluidization number to realize.
The implementation of task of the present invention is: after passing the gas flow modulation measuring system as the air stream of fluidizing agent, enter the air-distribution device of fluid bed housing lower end through appendix, so that air velocity enters in the upper fluid-bed after evenly again, and pass the fluidisation magnetite powder and mix the dense media layer of giving with quartz sand and flow out.After air velocity reached minimum fluidizing velocity, the different-grain diameter raw coal that is added by the cycle charging gear on fluid bed housing top will be suspended in the differing heights of bed by the density size under the supporting of dense media, thereby reaches the purpose of sorting.Coal and dense media can be sent into by the cycle charging gear on top.Cleaned coal after the sorting and spoil are exported after removing medium apparatus by an annular anchor chain scraper plate output system that is contained in the fluid bed.
In addition, in air-distribution device, air stream at first is that the pre-air compartment that enters the bottom slows down, all presses, and passes top pre-air distribution plate with low speed, steady air flow.Pre-air compartment is that a top is cuboid, and the bottom is the casing that chamfered edge platform shape combines.Pre-air distribution plate then adopts the straight hole plate and directly is fastened on the angle steel that is welded on the pre-air compartment housing.Better for making as the air velocity uniformity of fluidizing agent, install the incompressible packed layer that one deck is made up of glass marble additional on pre-air distribution plate top, and in incompressible packed layer, increase by one group of " ++ " type and cut apart plate, incompressible packed layer equal-volume is separated into polylith.Simultaneously, for preventing that coal grain and dense media fall into the incompressible packed layer of bottom and the uniformity that further increases fluidizing agent in the fluidized-bed layer, be provided with the tissue layer of holding by the two layer screen network folder on incompressible stratum top, two-layer screen cloth is positioned at air-distribution device and fluid bed housing junction, can make the tight tissue layer of two layer screen network folder by fastening both sides bolt.
Choose at branch, because the fluid bed size is too big, only adopt single large scale air-distribution device, its fluid effect is relatively poor.Therefore, fluid bed coal separation device adopts a plurality of air-distribution device combination methods, by being the air-distribution device of the large scale bed of a Len req through vertically being put together with several same small size air-distribution devices.
In addition, the annular anchor chain-scraper plate output device that adopts among the present invention is made up of discharge scraper plate, active drive wheel, driven pulley and four directive wheels that double-stranded transmission drives, and two scraper plates are implemented mandatory reverse discharge to floating thing and hypostasis respectively about it.Simultaneously, according to the component characteristic that drifts along of sorting raw coal, the floating thing of annular anchor chain-scraper plate output device is discharged the section anchor chain-scraper plate of its top (the promptly floating thing de-mediated device with) and hypostasis discharge section (being the anchor chain-scraper plate on hypostasis de-mediated device and its top) is designed to certain inclination angle respectively.It can be with most dense media in the inner use of bed, and the fraction dense media removes and reclaims through magnetic separator through the de-mediated device.Thereby realized the closed cycle of dense media in the sorting bed in the system substantially, improved the character of fluid bed and the stability of separating effect.The de-mediated device is exactly the punching sieve plate.
The present invention has following advantage compared with the prior art: except that having dry advantage, it is low also to have a cost, small investment, the dirty advantage such as few of ring, with the wet coal preparation factory of similar scale relatively, investment cost reduces 2/3, producing cost also reduces 2/3.The present invention has opened up new way for the sorting of the coal of water-deficient area and the easy argillization of chance water.
By between density level the difference 0.05g/Cm
3The test of density ball in dry fluidized bed sorting unit, its sorting possible deviation value Ep=0.025(Ep-efficiency of separation index), this numerical value is far superior to conventional superseded sorting, approaches the existing wet method separating effect that heavily is situated between.
Description of drawings:
Accompanying drawing 1 is that the structure master of dressing coal with dry fluidized bed device looks schematic diagram;
Accompanying drawing 2 is structure master's cross-sectional schematic of air-distribution device in the dressing coal with dry fluidized bed device;
Accompanying drawing 3 is A-A face cutaway top views of Fig. 2.
1-3 is described in further detail embodiments of the invention below in conjunction with accompanying drawing.
Dressing coal with dry fluidized bed device of the present invention has a housing (3), the shape of housing (3) is similar to trapezoidal, be respectively equipped with a floating thing outlet (15) and a hypostasis outlet (20) in the both sides, upper end of housing, be respectively equipped with raw coal feeding mouth and dense media feeding mouth (2 at the top of housing (3), 1), inlet scoop (1,6) is equipped with the cycle charging gear (8) of even feeding on feeding mouth.Four directive wheels (19) that annular anchor chain-scraper plate output device (1) is the main drive wheel (17) that is provided with respectively by both sides, upper end housing (3) in and driven pulley (18), be provided with in fluid bed bottom and upper parallel, and the bottom of anchor chain-scraper plate composition is the loop configuration composition that level, both sides have certain inclination angle respectively.Under near the upper strata scraper plate of the annular anchor chain-scraper plate of floating thing outlet (15) and be separately installed with punching sieve plate under the upper strata scraper plate near the annular anchor chain-scraper plate of hypostasis outlet (20) and remove medium apparatus (2) and (14) with certain inclination angle.Be provided with air-distribution device (6) in the below of housing (3), it is that cuboid, bottom are the pre-air compartment (10) of chamfered edge platform shape that said air-distribution device has top.Be installed in pre-air compartment (10) top and have the pre-air distribution plate (5) of straight hole, its by bolted on the angle steel that is welded on pre-air compartment (10) wall, in pre-air distribution plate (5) top with a certain distance from double-deck screen cloth (4) is installed, clamping has textle layers (13) between double-deck screen cloth (4), between the lower screen cloth of pre-air distribution plate (5) and double-deck screen cloth (4), fill glass marble packed layer (12) with certain thickness incompressible diameter 4～10mm, have one group of " ++ " type to cut apart plate (11) in incompressible packed layer (12) incompressible packed layer equal-volume is divided into polylith, an end is equipped with the appendix (9) of regulating the measurement valve and is connected with pre-air compartment.The air-distribution device that is located at fluid bed housing (3) bottom can be made up of one or more air-distribution devices (6).Coal or dense media are sent into the coal separation device through the cycle charging gear by wheel rotation.After crossing gas flow modulation measuring system (7) as the air communication of fluidizing agent, in appendix (9) enters the air-distribution device (6) of fluid bed housing (3) lower end, be decelerated, homogenizing.Thereafter, air flows in the fluid bed housing (3) on top and contacts with raw coal with heavily Jie in the fluid bed, raw coal is to enter by the cycle charging gear (8) that is arranged on fluid bed housing (3) upper end, because the density of coal and spoil is different, after coal and spoil are sent into the fluid bed with certain density, coal less than fluidized bed densities can float, at the bottom of promptly being sunken to bed greater than the spoil of fluidized bed densities, annular anchor chain-scraper plate is by main drive wheel (17) transmission of floating thing end, the upper strata scraper plate is moved to the left shown in arrow among Fig. 1, can discharge from discharge gate (15) by coal separation device left end punching sieve plate (2) floating thing (being cleaned coal), hypostasis (being spoil) is discharged from discharge gate (20) by coal separation device right-hand member punching sieve plate (14).
In operating process, implement the dense media closed cycle and drift along to form the mandatory reverse discharging method that adopts floating thing, hypostasis except that utilizing annular anchor chain-scraping plates system according to coal, also by adopting rational medium kind, the method for the particle diameter of control medium and fluidized-bed layer height and fluidization number realizes continuous, the stable operation of fluid bed.By experiment, the optimal parameter of determining the dense media grain size proportion is: Fe
3O
4Percetage by weight be 40%, optimal granularity 0.15～0.30mm; SiO
2Percetage by weight be 60%, optimum grain-diameter is 0.24～0.48mm, the fluidized-bed layer height is 200～400mm; Fluidization number N is 1.6～2.0, (wherein N represents the ratio of working flow rate and minimum critical flow velocity, and the N value is as exceeding above-mentioned scope, and fluid bed is produced unstable, and promptly density shakiness in the bed can't be carried out sorting).
Claims (12)
1, a kind of dressing coal with dry fluidized bed device.Have a housing (3), be provided with air-distribution device (6), annular anchor chain-scraper plate output device (1) is installed in housing (3), it is characterized in that in the below of housing (3):
A, said air-distribution device (6) have pre-air compartment (10), be installed in the pre-air distribution plate (5) that has straight hole on pre-air compartment (10) top, in pre-air distribution plate (5) top with a certain distance from the double-deck screen cloth (4) of installation, clamping has certain thickness incompressible glass marble packed layer (12) between double-deck screen cloth (4), and the appendix (9) that an end is equipped with control valve is connected with pre-air compartment (10).
B, be provided with raw coal and dense media feeding mouth (21) on housing (3) top
C, be provided with inlet scoop (16) on housing (3) top;
D, be respectively equipped with a floating thing outlet (15) and a hypostasis outlet (20) in both sides, housing (3) upper end, under upper strata scraper plate, the punching sieve plate with certain inclination angle is installed and removes medium apparatus (2), under lower floor's scraper plate, the punching sieve plate with certain inclination angle is installed and removes medium apparatus (14) near the annular anchor chain-scraper plate output device (1) of hypostasis outlet (20) near the annular anchor chain-scraper plate output device (1) of floating thing outlet (15).
2,, it is characterized in that its air-distribution device (6) has and cut apart plate (11) what incompressible packed layer (12) equal-volume was divided into polylith by the described dressing coal with dry fluidized bed device of claim 1.
3, by the described dressing coal with dry fluidized bed device of claim 1, it is characterized in that on raw coal and the dense media feeding mouth (21) cycle charging gear (8) being installed.
4, by the described dressing coal with dry fluidized bed device of claim 1, it is characterized in that said annular anchor chain-scraper plate output device (1) is main drive wheel (17) and the driven pulley (18) that is provided with respectively by both sides, upper end in housing (3), four directive wheels (19) in fluid bed bottom and upper parallel setting, and the bottom that anchor chain-scraper plate is formed is level, and both sides have the loop configuration at certain inclination angle respectively.
5, a kind of dressing coal with dry fluidized bed method, make to the fluidisation in air-dense media fluid bed of the raw coal in people's fluid bed housing (3) and be divided into floating thing and hypostasis (being cleaned coal and spoil) by sending into air stream, and utilize annular anchor chain-scraper plate output device (1) will float thing and hypostasis respectively and discharge housing (3), it is characterized in that:
A, by air-distribution device (6) air stream is sent in the fluid bed housing (3), made the uniform and stable fluidisation of dense media, form fluid bed, the fluidization number N in the fluidisation running is 1.6～2.0, and the fluidized-bed layer height is 200～400mm.
B, utilize cycle charging gear (8), evenly feed raw coal and dense media in the fluid bed by spout (21), adopt annular anchor chain-scraper plate output device (1) and remove medium apparatus (2) and (14), carry out and force reverse discharge, and make most dense media in fluid bed, to reuse;
C, dense media adopt Fe
3O
4And SiO
2, its weight percentage is: Fe
3O
4Be 40%, SiO
2Be 60%, the optimal granularity scope of dense media in fluid bed is: Fe
3O
4Be 0.15～0.3mm, SiO
2Be 0.24～0.48mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN87101056.9A CN1005314B (en) | 1987-05-28 | 1987-05-28 | Process and device for dressing coal with dry fluidized bed |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN87101056.9A CN1005314B (en) | 1987-05-28 | 1987-05-28 | Process and device for dressing coal with dry fluidized bed |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN87101056A CN87101056A (en) | 1987-12-16 |
| CN1005314B true CN1005314B (en) | 1989-10-04 |
Family
ID=4813146
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN87101056.9A Expired CN1005314B (en) | 1987-05-28 | 1987-05-28 | Process and device for dressing coal with dry fluidized bed |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1005314B (en) |
Families Citing this family (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1032122C (en) * | 1992-10-16 | 1996-06-26 | 中国矿业大学 | Large air fluidized bed for separating heavy solids medium |
| CN1046102C (en) * | 1993-02-15 | 1999-11-03 | 中国矿业大学 | Vibration fluidized-bed dry sorting method and apparatus for fine coal |
| CN1058203C (en) * | 1996-04-10 | 2000-11-08 | 中国矿业大学 | Method and device for sorting three products by using double-density layer air heavy medium fluidized bed |
| CN104998745A (en) * | 2014-03-14 | 2015-10-28 | 衢州市易凡设计有限公司 | Dry type coal dressing method |
| CN104148164B (en) * | 2014-07-04 | 2016-09-21 | 中国海洋石油总公司 | A kind of method utilizing carbon dioxide to carry out coal washing |
| CN104525359B (en) * | 2014-12-30 | 2017-05-17 | 唐山市神州机械有限公司 | Dry method heavy media separator adopting dry method heavy media separation bed and separation device |
| CN106140455A (en) * | 2016-06-28 | 2016-11-23 | 陕西陕煤黄陵矿业有限公司 | A kind of coal preparation plant's end fault continuous coal separation aid system and method |
| CN106622627B (en) * | 2017-01-14 | 2019-08-23 | 泰富重工制造有限公司 | A kind of sand washer |
| CN107866378B (en) * | 2017-11-17 | 2023-07-07 | 华北科技学院 | Device and method for rapidly separating coal dust and gangue powder in experimental coal sample |
| CN113514239B (en) * | 2021-06-24 | 2023-03-24 | 国家能源集团新疆能源有限责任公司 | Air distribution plate online detection method and system and storage medium |
-
1987
- 1987-05-28 CN CN87101056.9A patent/CN1005314B/en not_active Expired
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| Publication number | Publication date |
|---|---|
| CN87101056A (en) | 1987-12-16 |
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