CN104475231B - Dry method dense medium separation bed - Google Patents
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- CN104475231B CN104475231B CN201410840304.9A CN201410840304A CN104475231B CN 104475231 B CN104475231 B CN 104475231B CN 201410840304 A CN201410840304 A CN 201410840304A CN 104475231 B CN104475231 B CN 104475231B
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Abstract
The invention provides a dry method dense medium separation bed. The dry method dense medium separation bed is dedicated to a dry method dense medium separator. Three flowing material flows (gas, a dense medium and coal) in the dry method dense medium separation bed are respectively intersected in a separation bed layer; the dense medium is in a fluidization separation chamber of the separation bed, compressed gas enters the fluidization separation chamber for fluidizing the dense medium after entering an air chamber for primary pressure equalization, and a fluidized bed suitable for separation is formed. The separation bed can satisfactorily solve the problems that the fluidized density is unstable and the air flow distribution is non-uniform in the fluidization process, the medium draining efficiency of an existing medium draining screen for a fine material is relatively low and the magnetic medium content of the fine material after medium draining is relatively high; the medium draining efficiency of the fine material can also be obviously improved.
Description
Technical field
The invention belongs to dry method ore dressing field is and in particular to a kind of dry method dense medium separation bed, it is particularly well-suited to coal
Separate with the mineral of other different densities, belong to solid screening installation.
Background technology
At present, domestic and international application is in industrial dry method dense media separator, mainly with air jig and air table
Based on.Water is replaced to make separating medium with air, separating effect is poor, production capacity is low, require wind-force big, gradually eliminates.
From nineteen sixties, U.S. douglas e, Canadian beeckmans j m etc. scholar successively carries out
Commonly gas-solid fluidized bed dry separation research, its grading principle is, using fine granular materials (as magnetite powder) as medium solid,
Uniformly in the presence of ascending air, form the gas-particle two-phase fluidisation bed with certain density, selected material (as coal) feeds bed
By fluidized bed densities layering after layer, thus realizing sorting.But because these scholars are with fluidized-bed reactor material on chemical industry
Based on principle,displacement, do not have to further investigate and be suitable for the concentrated phase high density fluidization characteristic of coal separation and (such as air distributor, increase
Matter grain size distribution etc.), do not enable industrialization.
From the eighties in 20th century, China Mining University takes to the research of fluidization dry coal preparation aspect, develops
Dry separation technology based on Dual-Phrase Distribution of Gas olid and equipment.Using fluidizing gas and there is the medium solid of certain particle size (as Magnet
Breeze), form concentrated phase fluid bed, selected material is subject to the buoyancy of fluidized-bed layer global density to make in gas-solid phase bed
With, according to bed density layering, less than bed density material float, more than the material sinking of bed density, thus realize into
Select effective sorting of material.It is new on the way that gas-solid dense medium separation fluid bed provides an efficient dry method cleaning sorting for world's coal
Footpath, has broad application prospects and major application is worth.Tangshan Divine Land Machinery Co., Ltd. started to dry method weight in 2006
Since media separation is theoretical and sorting process studied, after the numerous studies data of dry method dense medium sorting is analyzed, become
Work(develops dry method dense medium separation device of new generation, and is successfully applied to industrialization.
But, in the past to the research of dry method dense media separator there is problems in that in fluid mapper process fluid density unstable
Fixed and air flow method is uneven, thus more difficult improves the sharpness of separation to difficult separation coal and efficiency；And there is existing sculping screen pair
Fine de-mediated is less efficient, the problems such as the fine magnetizing mediums content after de-mediated is higher, so that fine de-mediated
Efficiency cannot improve.
Content of the invention
In order to solve problems of the prior art, the present invention proposes a kind of dry method dense medium separation bed, and this one kind is done
Method dense medium separation bed not only can solve that fluid density in fluid mapper process is unstable and air flow method is uneven well and
The problems such as existing sculping screen is less efficient to fine de-mediated, the fine magnetizing mediums content after de-mediated is higher is moreover it is possible to reality
Fine de-mediated efficiency is now made to be significantly improved.
According to technical scheme, provide
Therefore, the dry method dense medium separation bed of the present invention carries out sorting in high precision for difficult separation coal etc. and production capacity is larger
The fluidisation sorting bed being carried out using dense media and coal dust blending agent, fluid density in prior art can be overcome unstable and
Air flow method is uneven to wait deficiency, thus improving the sharpness of separation to difficult separation coal and efficiency.It further overcomes existing de-mediated
Sieve is less efficient to fine de-mediated, the problems such as the fine magnetizing mediums content after de-mediated is higher, makes fine de-mediated
Efficiency is improved.Using the dry method dense medium separation bed of the present invention, sorting material effectively will be treated in gases at high pressure and dense medium
Fluidize layering according to high/low density in the gas-solid phase bed of matter, realize sorting.
Brief description
Fig. 1-1 to 1-3 is the front view of dry method dense media separator, left view and the top view of the foundation present invention respectively.
Fig. 2 is the dry method dense media separator process chart according to the present invention.
Fig. 3 is according to the dense medium separation main machine structure schematic diagram in the dry method dense media separator of the present invention.
Fig. 4-1 is rustless steel grate schematic diagram in dry method dense media separator structure.
Fig. 4-2 is the longitudinal cross-section schematic diagram of rustless steel grate in dry method dense media separator structure.
Fig. 4-3 is the transverse sectional view of rustless steel grate in dry method dense media separator structure.
Fig. 5-1 is the front view of scraper plate pinch roller cleaning mechanism.
Fig. 5-2 is the left view of scraper plate pinch roller.
Fig. 6-1 is scrapper conveyor wear-resistant block part front view.
Fig. 6-2 is scrapper conveyor wear-resistant block part sectional view.
Fig. 7-1 is scraper plate right view.
Fig. 7-2 is scraper plate front view.
Fig. 8-1 is high pressure air compartment detailed maps.
Fig. 8-2 is another high pressure air compartment detailed maps.
Specific embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is carried out clear, complete
Site preparation description is it is clear that described embodiment is only a part of embodiment of the present invention, rather than whole embodiments.Base
Embodiment in the present invention, those of ordinary skill in the art obtained under the premise of not making creative work all its
His embodiment, broadly falls into the scope of protection of the invention.
The present inventor is directed to problems of the prior art, and the research and development to dry method dense media separator of new generation are entered further
The research and development of row basis and pilot development, essentially consist in following aspect:
(1) laboratory basic research and model test
Based on research accumulation for many years, laboratory basic research and model test are carried out to dry method dense medium fluidized bed, wound
Found concentrated phase high density gas-solid fluidization dry separation theory it is proposed that cloth wind and wide grade increase quality and grade and join principle, established
Wide-size distribution multi-component masses sort kinetic model in concentrated phase High Density Gas-solid Fluidized.
(2) new generation dry method dense medium fluidized bed dry method dense media separator
Based on theoretical research, model test and pilot scale, have developed dry method dense media fluid-bed separator of new generation.Based on spy
Different technological requirement, according to the thought of pressure drop central tenet and low fluidization number, big pressure drop Compound Fabric wind, by dividing to dry method dense medium
The machine-operated key member of choosing and integrally-built optimization design and innovation.
Below in conjunction with the accompanying drawings, invention is further described.
Fig. 1-1 to 1-3 is the front view of dry method dense media separator, left view and the top view of the foundation present invention respectively.
Wherein each reference specifically indicates: 1 bellows chamber, 2 float end media drum sieves, 3 pipeline of dust collector, 4 feeding mouths, 5 dense media
Sorting main frame, 6 magnetic separators, 7 sack cleaners, 8 medium bucket elevators, 9 roots blowers, 10 sack cleaner air-introduced machines, 11 hypostasis
End media drum sieve, 12 high-pressure air pipes.
Dry method dense media separator is discharged and is carried a certain amount of medium in product, therefore float end media drum is sieved 2 and sinks
Thing end media drum sieve 11 is arranged at the lower section of dry method dense media separator float exhaust end and hypostasis exhaust end, for sorted product
Separate with medium.
In order to prevent dry method dense media separator dust polluting environment in the course of the work, using sack cleaner 7 dedusting,
Dry method dense media separator top is provided with pipeline of dust collector 3, and makes suction air volume be more than the air feed during work of dry method dense media separator
Amount, is in negative pressure state in machine, so that dust in dry method dense media separator is not escaped, and, is situated between at the easy float end producing dust meanwhile
Matter rotary screen 2, hypostasis end media drum are sieved 11 and magnetic separator 6 etc. and are respectively provided with sweep-up pipe, and whole system is in totally-enclosed dry work
State.
Bellows chamber 1, roots blower 9 and high-pressure air pipe 12 constitute the air feed system of dry method dense media separator, are dry method dense medium
Stable wind regime is provided during separator work.
Fig. 2 is the dry method dense media separator process chart according to the present invention.During using dry method dense media separator, main bag
Include following steps:
The first step, 6-100mm level coal enters dry method dense media separator, and dense media is also into dry method dense media separator, dry method
The feed of dense media separator feeds along dry method dense media separator even width, and feeding coal and addition dense medium quality should continuously may be used
Adjust.
Second step, air feed system is made up of roots blower, bellows chamber and some airducts, and dry method dense media separator top connects air inducing
Dust pelletizing system, during work, from air feed system to dry method dense media separator in provide compressed air, join according to certain with dense media
Ratio forms gas-solid phase bed, and then realizes the layering sorting of different densities.
3rd step, dry method dense media separator is discharged in product and is carried a certain amount of medium, so being provided with media drum sieve,
It is positioned over the lower section of dry method dense media separator float exhaust end and hypostasis exhaust end, separate with medium for sorted product.Point
From after medium rise in the magnetic separator above dry method dense media separator using medium bucket elevator, by magnetic separator in medium
Coal dust removes, purer medium is unloaded to dry method dense media separator, so that medium is can be recycled, and reduces the consumption that is situated between.
4th step, dust sucting pipeline is arranged at dry method dense media separator top, and dust sucting pipeline connects sack cleaner, reduces dry method weight
Medium separator environmental pollution in the course of the work.
Fig. 3 is according to the dense medium separation main machine structure schematic diagram in the dry method dense media separator of the present invention.In Fig. 3 each
Reference specifically indicates: 501 float end dischargers, 502 float scraper plate sprocket wheels, 503 float scraper plate pinch rollers, 504 inspection windows,
505 inspection doors, 506 float chain scraper plates, 507 medium powder conveying worms, 508 hypostasis scraper plate sprocket wheels, 509 hypostasis end dischargers,
510 hypostasis scraper plate pinch rollers, 511 main frame supporting legs, 512 hypostasis scraper plates, 513 high pressure air compartments, 514 glass flow rate meters, 515 main cases
Body.
Float end discharger 501 and hypostasis end discharger 509 are located at the main both sides selecting machine, and its effect is to discharge product and lock
Wind；The whole main frame of the present invention is totally enclosed type, can ensure that in main frame, blast is constant using discharger, air tight.
As shown in figure 3, float scraper plate sprocket wheel 502, float scraper plate pinch roller 503, float chain scraper plate 506, hypostasis scraper plate sprocket wheel
508th, hypostasis end discharger 509, hypostasis scraper plate pinch roller 510 and hypostasis scraper plate 512 constitute the main separation system selecting in machine,
Float after sorting and hypostasis are transported to the main discharge port selecting machine both sides respectively, then via discharger, product are discharged.
Glass flow rate meter 514 is located at the lower section of dry method dense media separator, can detect gas-solid two in dry method dense media separator
The proportion of phase mixture, more helps intuitively and exactly user to complete to sort.
Medium powder conveying worm 507 scrapes the lower section of plate exit positioned at hypostasis, the discharge medium at hypostasis end can be transported to master
Select in machine.Inspection windows 504, inspection door 505 are equipment inspection and maintenance window, open up on host shell 515.High pressure air compartment
The high-pressure blast that roots blower is produced by boasting can be distributed more uniformly across main choosing in machine by 513.
Fig. 4-1 is rustless steel grate schematic diagram in dry method dense media separator structure, and wherein Fig. 4-2 is that longitudinal cross-section is illustrated
Figure；Fig. 4-3 is transverse sectional view.Rustless steel grate is by justifying pull bar 41 and castor bar 42 forms.
This rustless steel grate is distributed in the air compartment that high-pressure blast is indoor, under preventing oarse-grained material entrance from sieving, from not
Rust steel grate is not because its wearability is good, perishable, good, the stable performance of rigidity.
Fig. 5-1 is scraper plate pinch roller cleaning mechanism front view, and 5-2 is scraper plate pinch roller left view.Wherein each reference tool
Body indicates: 51 regulating bolts, 52 comb, 53 pinch rollers.Comb 52 be with pointed can according to the steel plate of certain track rotation,
Under the support of regulating bolt 51, its pointed tooth under normal work, by the good and groove outside diameter direction of pinch roller 53
There is the gap of 2 millimeter, can scrape off bearing the material on pinch roller, prevent from changing the running orbit of scrapper conveyor.
Fig. 6-1 is the front view of wear-resistant block, and Fig. 6-2 is the sectional view of wear-resistant block, and wear-resistant block is main to select machine inside strake machine
Peculiar part, it is the excessive link connecting scraper plate and chain, and in work, wear-resistant block is along the main tracks travel selecting in machine, institute
To require, it must do Wear-resistant Treatment (as a face of in figure) and abrasion hardness requires more than hrc55.
Fig. 7-1 is the right view of scraper plate, and Fig. 7-2 is the front view of scraper plate, and wherein each reference specifically indicates: 71 scrape
Plate base plate, 72 reinforcement arc plates, 73 studs.When main select machine sorting bed surface exceed specific numerical value when, rigid and anti-in order to increase it
Curved, and when weight can not be overweight, can make by schematic structure, that is, save material, and do not affect its rigidity.
Fig. 8-1 is high pressure air compartment detailed maps.Fig. 8-2 is another high pressure air compartment detailed maps.Wherein each accompanying drawing
Labelling specifically indicates: 801 air compartment side plates, 802 rustless steel castor bar grizzl(e)ies, 803 air distribution plates, 804 air compartment base plates, 805 air inlet pipe.Air compartment
Side plate 801 and air compartment base plate 804 constitute air compartment, and, above base plate, air inlet pipe 805 perforate is on base plate, stainless for air distribution plate 803
Above air compartment, purposes is to make air feed more uniform to steel castor bar grizzl(e)y 802, no dead angle.
The dry method dense media separator of the present invention overcomes that existing single-stranded scraper plate motor speed is single, and upper end defeated coal efficiency is low, under
It is net that end spoil scrapes row, the problems such as leave dead angle.
Using the present invention dry method dense media separator it is provided that a kind of dry method dense medium fluidized bed dry method dense medium sorting
Machine, this dry method dense media separator has the fluidization sorting bed of the defect that can overcome prior art, and it has rational discharge
Scraper plate, have Rational Sizing of Wood Material adjustable-speed, reasonably effectively sorting segment length, sorting bed height, thus improving sharpness of separation.
It has rational medium-separation device further, to improve de-mediated efficiency and to increase product recovery rate.
Closer, using the present invention dry method dense media separator it is provided that a kind of dry method dense medium fluidized bed divides
Screening device, it can integrate sorting with dedusting, air-supply, feed, and its sorting groove solves sorting groove of the prior art
Defect.
Study carefully the essence of its present invention, the dry method dense media separator of the present invention in the technology overcome prior art defect first
There is provided a kind of dense media fluidization sorting bed, including three kinds of flowings stream (gas, medium solid and coal) in sorting bed all in sorting
Cross in bed.Medium solid sorts interior in the fluidisation of sorting bed, and compressed gas are entered after air inlet chamber is tentatively all pressed to enter back into fluidisation
Medium solid is fluidized by separation chamber, forms the fluid bed being suitable for sorting.Double-strand scraping plate conveying device is counterclockwise with friction speed respectively
Direction rotates, and enters coal separation and enters from the one end on top, and cochain promotion pan feeding is layered to left movement, at the volley pan feeding, hypostasis
Will not be promoted by scraper plate again, it is gradually sunk to the bottom of fluidisation separation chamber, hypostasis is discharged by lower chain from tail coal end；In fluidisation
The float of bed top is discharged from cleaned coal end by cochain.Fluidisation is the process of a continuous air blast, and gas is from solid particle interface liter
After going out, should be barotropic state, but the absorbing quantity of dedusting is more than Fluidization wind rate, makes the upper space in sorting main frame be in negative pressure
State, row coal end and other positions all without have dirt escape.Float can take part medium solid with hypostasis out of when discharging, and uses cylinder
After sieve de-mediated, oversize can go specified location by conveying equipment fortune；The lower medium solid of sieve falls on medium belt under sieve, upper bucket
The machine that carries returns sorting main frame through chute.
Rotary screen medium-separation device refers to the cleaned coal after sorting bed is sorted and spoil respectively from cleaned coal mouth and spoil mouth
Enter respective rotary screen medium-separation device after discharge and carry out de-mediated, rotary screen utilizes central axis to drive compass screen surface rotation, makes thing
Material carries out de-mediated on rotation compass screen surface, and using this kind of device, de-mediated efficiency is higher.
In order that material effectively can be sorted in fluidized-bed layer, the light density material after enabling to be sorted obtains
Fully float, and weight density material can be sunk completely, and employ double-strand carrier bar discharge device, available upper strata chain
Plate conveys light density material, so that two kinds of materials is fully efficiently separated.
One of inventive point of the present invention is: sets based on to dry method dense media separator critical component and integrally-built optimization
Meter and innovation, the dry method dense medium fluidized bed dry method dense media separator developed substantially increases the uniform and stable of fluidized-bed layer
Property, improve separating effect, reduce maintenance of equipment work amount and time it is ensured that dry method dense media separator long-time, continuous,
Stablize, efficiently run.
The another of the inventive point of the present invention is: new gas distributor and quick detachable air-distribution device.Gas distributor is
One of key factor of impact bed fluidisation and separation performance, its major parameter includes material, structure, pressure drop, percent opening, aperture
Deng.It is continuously to discharge sorted product outside machine, in fluid bed, be provided with scraping plate conveying device, under the thrust of air distribution plate,
High density, high rigidity hypostasis and air distribution plate extrude, rub, and hypostasis occurs different degrees of broken, generation particulate hypostasis, with
When, air distribution plate upper surface is subject to different degrees of wearing and tearing.Therefore, air distribution plate should have good anti-plug-hole, easy to clean, wear-resistant
Performance.Based on special technological requirement and pressure drop quasi- number cp diagnostic method, carry out substantial amounts of theoretical and experimentation, developed two
Class combined type gas distributor.One is base steel fiber composite distributor, mainly by base steel plate of material and fibrous layer compound suppressing
Become, there is surfacing, the features such as wear-resistant, anti-lump material embeds, cloth wind is uniform.The effect of base steel plate of material is supporting bed
Layer material, shock resistance and abrasion, fibrolaminar effect is to control pressure drop, even distributing wind.Two is two-stage composite big pressure drop gas
Distributor, is mainly formed by stacking by base steel porous backplate and metal gauze pressboard or weave cotton cloth, have easy to clean, surfacing,
Wear-resistant the features such as.The effect of base steel porous backplate is to support bed material, shock resistance and abrasion, detachably clear when needed
Reason, for effectively delaying the plug-hole cycle, can adopt coniform hole, choose suitable ratio of height to diameter simultaneously.Metal gauze pressboard or weave cotton cloth
Effect be control pressure drop, even distributing wind, simultaneously because having some strength, can anti-lump material embed and Auxiliary support bed
Layer material.
During coal separation, sorted product continuously need to be discharged machine by the drag conveyor in dry method dense media separator
Outward, by its thrust, in bed bottom, the strong hardness hypostasis that is in stacking states and air distribution plate moment be in extruding and rub
State, which results in the abrasion of the broken of hypostasis and air distribution plate upper surface, and the particulate hypostasis pulverizing generation easily block into
Pore, have impact on performance and the service life of air distribution plate.Once air distribution plate damages, it is difficult to change, and workload is very big, need 5
～7 day time just can complete.Invention to solve this problem, it is proposed that a kind of drawer type quick detachable air-distribution device, this device dismounting consumption
When only need 3～5 hours, be easy to keep in repair and adjust, it is ensured that dry method dense media separator is long on the premise of not affecting production task
Time, continuously and stably run.
Medium solid short distance reflux:
In assorting room, part medium solid is discharged outside dry method dense media separator with product.If medium solid circulating load
Larger, then increased the regulation and control difficulty of fluid bed, affect separating effect.For reducing medium solid circulating load, in the sorting of dry method dense medium
In machine design process, increased medium solid short distance reflux, as shown in Fig. 5-1,5-2 and Fig. 6-1,6-2.This short distance is applied to return
Stream device, the medium solid circulating load outside machine decreases 80%, considerably reduces operation power consumption and cost it is easy to fluid bed is adjusted
Control, improves separating effect.
The another of the inventive point of the present invention is: process system design is optimized:
Raw coal is prepared, sorts by modular dry method dense medium fluidized bed Recognition Applied in Coal Preparation System, dense medium purifica tion reclaims, air feed dedusting collection
Become to be assemblied in identical platform, be a kind of coal high-efficiency dry coal preparation system of continuous operation.Its operation principle is as follows:
(1) fluidization assorting room
Fine-grained solids medium solid, in the presence of the ascending air after even distributing wind, forms and has quasi-fluid characteristic
Gas-solid phase, selected material is subject to the buoyancy of fluidized-bed layer global density in gas-solid phase bed, thus pressing
According to bed density layering, float less than the material of bed density, more than the material sinking of bed density, the weight product after layering
Discharged by scraping plate transmission mechanism respectively, complete assorting room.Dry method dense medium fluidized bed dry method dense media separator is exactly to use
Above-mentioned principle sorts to selected material, obtains cleaned coal and tail coal product.
(2) separation system work process
System process forms equally distributed ascending air for compressed air by pre- air compartment and air distribution plate, and with
Medium solid effect in dry method dense media separator forms the fluidized-bed layer with certain density.Feed coal is classified through (drying)
(100～6mm) is uniformly fed in dry method dense media separator by batcher afterwards, by after fluidized-bed layer density stratification light, produce again
Thing is discharged by discharge mechanism.Light product and weight product, respectively through sculping screen de-mediated, obtain cleaned coal and tail coal.Sculping screen removing
Medium solid is partly into magnetic separator and removes nonmagnetics therein (coal dust), and another part recycles.Circulatory mediator shunts
The feeding coal of amount, magnetic concentrate and circulatory mediator is adjusted according to the height of fluidized-bed layer in dry method dense media separator and density,
Realize the control to fluidisation bed height and density.The dust that separation system produces in the course of the work, is received by air inducing dedusting
Collection, circulation.
(3) dry method dense media separator has following breakthrough
Break through traditional wet coal preparation theoretical, founded concentrated phase high density gas-solid fluidization dry separation theoretical it is proposed that
Cloth wind and wide grade increase quality and grade and join principle.Develop two-stage composite big pressure drop gas distributor, there is cloth wind uniform, readily removable
Unload, the performance such as anti-blocking resistant wear；Devise short distance reflux, make medium solid circulating load decrease 80%；Increased using wide grade
Matter, leading size fraction ranges have widened 2.5 times, considerably reduce operating cost.
By integrated to related auxiliary equipment for dry method dense medium fluidized bed dry method dense media separator of new generation, modularity, grind
Make modular dry method dense medium fluidized bed Recognition Applied in Coal Preparation System and equipment, disposal ability is 40～60t/h, sharpness of separation (may be partially
Difference e-value) it is 0.05～0.08g/cm3, pan feeding grade is 100～6mm, and separating density can be in 1.3～2.2g/cm3In the range of adjust
Section, sorts recovery efficiency>90%, ton coal is situated between and consumes<0.5kg.Modular dry method dense medium fluidized bed Recognition Applied in Coal Preparation System absorbing quantity is more than
Wind supply quantity, system is in negative pressure state, and rationally, dust is little for dust pelletizing system coupling；Steadily, noise is little for system operation, and meeting environmental protection will
Ask.
As above-mentioned, clearly describe in detail seismic signal scaling down processing method proposed by the present invention.Although this
Bright preferred embodiment describes in detail and explains the present invention, but those skilled in the art is appreciated that and is not carrying on the back
In the case of the spirit and scope of the present invention of claims definition, multiple repairing can be made in form and details
Change.
Claims (8)
1. a kind of dry method dense medium separation bed, it is exclusively used in dry method heavy-media separator it is characterised in that dry method dense medium separation
Machine includes bellows chamber, float end media drum sieve, pipeline of dust collector, feeding mouth, dense medium separation main frame, magnetic separator, bag-type dust
Device, medium bucket elevator, roots blower, sack cleaner air-introduced machine, hypostasis end media drum sieve, high-pressure air pipe；Wherein by float
End media drum sieve and hypostasis end media drum sieve are arranged under dry method dense media separator float exhaust end and hypostasis exhaust end
Side, is separated with medium for sorted product；Sack cleaner is used for dedusting, and dry method dense media separator top is provided with dedusting
Device pipeline, and make suction air volume be more than the wind supply quantity during work of dry method dense media separator, it is in negative pressure state in machine, so that dry method dense medium is divided
Dust in machine is selected not escape；It is respectively provided with sweep-up pipe at float end media drum sieve, hypostasis end media drum sieve and magnetic separator, whole
Individual system is in totally-enclosed working condition；Three kinds of flowing streams of the gas in dry method dense medium separation bed, medium solid and coal all exist
Cross in sorting bed；Medium solid sorts interior in the fluidisation of sorting bed, and compressed gas are entered after air inlet chamber is tentatively all pressed to enter back into
Medium solid is fluidized by fluidisation separation chamber, forms the fluid bed being suitable for sorting；
Double-strand scraping plate conveying device, respectively with friction speed rotate in an anti-clockwise direction, enters coal separation and enters from the one end on bed body top,
Cochain promotion pan feeding is layered to left movement, at the volley pan feeding, and hypostasis will not be promoted by scraper plate again, and it will gradually sink to stream
Change the bottom of separation chamber, hypostasis is discharged by lower chain from tail coal end；Float above fluid bed is discharged from cleaned coal end by cochain.
2. according to the dry method dense medium separation bed described in claim 1 it is characterised in that bellows chamber, roots blower and high-pressure air pipe
Constitute the air feed system of dry method dense media separator, when working for dry method dense media separator, provide stable wind regime.
3. according to the dry method dense medium separation bed described in claim 1 it is characterised in that the upper space in sorting main frame is in
Negative pressure state.
4. according to the dry method dense medium separation bed described in claim 1 it is characterised in that with after rotary screen de-mediated, oversize
Specified location can be gone by conveying equipment fortune；The lower medium solid of sieve falls on medium belt under sieve, upper bucket elevator returns through chute and divides
Select main frame.
5. according to claim 1-3 arbitrary described dry method dense medium separation bed it is characterised in that rotary screen medium-separation device
Cleaned coal after being sorted for sorting bed and spoil enter respective rotary screen after cleaned coal mouth with the discharge of spoil mouth respectively and take off
Jie's device carries out de-mediated, and rotary screen utilizes central axis to drive compass screen surface rotation, makes material carry out de-mediated on rotation compass screen surface.
6. the arbitrary described dry method dense medium separation bed of foundation claim 1-3 is it is characterised in that employ double-strand carrier bar
Discharge device.
7. the arbitrary described dry method dense medium separation bed of foundation claim 1-3 is it is characterised in that divide in dry method dense media
Bed is selected to use gas distributor, gas distributor is base steel fiber composite distributor or the distribution of two-stage composite big pressure drop gas
Device.
8. according to the dry method dense medium separation bed described in claim 7 it is characterised in that two-stage composite big pressure drop gas is distributed
Device is formed by stacking by base steel porous backplate and metal gauze pressboard or weave cotton cloth.
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| 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 |
| CN105381950B (en) * | 2015-10-19 | 2018-06-15 | 中国矿业大学 | A kind of large size dry method dense media fluid-bed separator and separation system |
| CN107838029A (en) * | 2016-09-21 | 2018-03-27 | 中国矿业大学 | A kind of gas-solid loop flow magnetofluidization sorting unit |
| CN108787045B (en) * | 2018-08-01 | 2023-12-12 | 河南黎明重工科技股份有限公司 | Vertical mill feeding chute device with fluidization function |
| CN114768988B (en) * | 2021-04-23 | 2024-01-26 | 永城煤电控股集团有限公司 | Stainless steel dense medium shallow slot coal sorter |
| CN113245052A (en) * | 2021-05-31 | 2021-08-13 | 伯特利(山东)工业设备有限公司 | Closed air system and method for dry separation of coal |
| CN113942851A (en) * | 2021-11-08 | 2022-01-18 | 唐山神州机械集团有限公司 | Vibration sorting bed feeding structure suitable for lump coal |
| CN114308659B (en) * | 2022-01-11 | 2022-11-29 | 中国矿业大学 | A magnetically assisted gas-solid interference fluidized bed separation device |
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| US4274947A (en) * | 1980-01-14 | 1981-06-23 | Beeckmans Jan M | Electrostatic method and apparatus for sorting fluidized particulate material |
| CN101318182B (en) * | 2008-06-11 | 2012-07-25 | 中国矿业大学 | Modular coal preparation process and equipment based on gas-solid diphasic stream |
| CN102049350A (en) * | 2009-10-26 | 2011-05-11 | 孙刚 | Air dense medium dry separation device |
| CN102839032B (en) * | 2009-11-19 | 2014-01-08 | 李功民 | Dry separation and drying combined device |
| CN102974543B (en) * | 2012-12-18 | 2018-07-03 | 孙刚 | A kind of Dense-medium dry separation equipment |
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Address after: Daodi Town, Lunan District, Tangshan City, Hebei Province Patentee after: Tangshan Shenzhou Machinery Group Co.,Ltd. Address before: 063001 Hebei province Tangshan City Fengnan rice triangle Tang No. six South Road Patentee before: Tangshan Shenzhou Manufacturing Co.,Ltd. |
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| PE01 | Entry into force of the registration of the contract for pledge of patent right |
Denomination of invention: A dry heavy medium sorting bed Granted publication date: 20170125 Pledgee: Bank of China Tangshan Branch Pledgor: Tangshan Shenzhou Machinery Group Co.,Ltd. Registration number: Y2024980017741 |