CN106669953A - Desliming type coarse slime separation overflow clean coal grading device of liquid-solid fluidized bed - Google Patents

Desliming type coarse slime separation overflow clean coal grading device of liquid-solid fluidized bed Download PDF

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Publication number
CN106669953A
CN106669953A CN201710024070.4A CN201710024070A CN106669953A CN 106669953 A CN106669953 A CN 106669953A CN 201710024070 A CN201710024070 A CN 201710024070A CN 106669953 A CN106669953 A CN 106669953A
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China
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overflow
staving
desliming
barrel
clean coal
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CN201710024070.4A
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CN106669953B (en
Inventor
夏文成
王天威
倪超
毛玉强
牛晨凯
谢广元
彭耀丽
沙杰
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China University of Mining and Technology CUMT
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China University of Mining and Technology CUMT
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    • BPERFORMING OPERATIONS; TRANSPORTING
    • B03SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
    • B03BSEPARATING SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS
    • B03B5/00Washing granular, powdered or lumpy materials; Wet separating
    • B03B5/62Washing granular, powdered or lumpy materials; Wet separating by hydraulic classifiers, e.g. of launder, tank, spiral or helical chute concentrator type
    • B03B5/623Upward current classifiers

Abstract

The invention discloses a desliming type coarse slime separation overflow clean coal grading device of a liquid-solid fluidized bed. The desliming type coarse slime separation overflow clean coal grading device comprises a separation and grading barrel, a fluid distributor and an overflow desliming device. The separation and grading barrel is composed of barrel bodies and a base cone, and a tailings valve is arranged at a lower opening of the base cone. A material inlet is formed in the upper portion of the upper barrel body. The overflow desliming device is composed of a top cone and an inclined barrel. The sectional area of an upper opening of the inclined barrel is larger than that of a lower opening of the inclined barrel, and an overflow groove is formed around the upper opening of the inclined barrel. An upper opening of the top cone is connected to the lower side surface of the inclined barrel and communicates with the inclined barrel in a sealed mode, and a lower opening of the top cone is provided with a coarse clean coal discharging valve. The fluid distributor is arranged at the bottom of the lower barrel body of the separation and grading barrel. The coarse clean coal is discharged out of the coarse clean coal discharging valve at the tail of the top cone after settling in the inclined barrel, fine slime is directly discharged out of the overflow groove, the fine slime removing capacity of overflow is enhanced, and the quality of overflow products is improved. Meanwhile, by means of the desliming type coarse slime separation overflow clean coal grading device of the liquid-solid fluidized bed, the subsequent desliming and dewatering processes of separation are simplified, the ash content in clean coal is reduced, pollution of high-ash-content fine slime to the clean coal is reduced, and the separation effect is improved.

Description

Desliming type liquid-solid fluid bed coarse slime size overflow cleaned coal grading plant
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 overflow Stream cleaned coal grading plant.
Background technology
Existing coal preparation technique great majority adopt technique of stepless gravity treatment with flotation in combination with, it is no matter selected before take off or not Desliming, the sorting size limit of gravity treatment and flotation is 0.5mm, actually due to two kinds of method for separating itself the characteristics of cause Coal grain separating effect near 0.5mm is poor, and this part coal grain(Refer generally to 3-0.25mm)GB(GB/T 7186-1998) It is defined as coarse slime.This partial particulate is typically individually reclaimed in coal preparation plant by high-frequency screen, its ash between cleaned coal and middle coal it Between, 2-5% typically high than cleans ash, its final whereabouts is difficult to confirm.Typically it is not sorted at present, majority mixes its part Enter cleaned coal, coal in another part incorporation.Development and the demand of society with the epoch, ash of the current coal market to coal product Divide and require more and more strictly, have minority coal preparation plant to enter to coarse slime using minor diameter dense medium cyclone or spiral in recent years Row sorting, but due to both devices deficiency of itself, it is impossible to reach satisfied effect.Minor diameter heavy medium cyclone is not Foot:Too thin to medium requirements, medium prepares and reclaims difficult and high cost;Pressure is high to be required to pan feeding, equipment attrition is tight Weight, power consumption is big;Although its sorting granularity lower limit is relatively low, thinner stock grading efficiency is low, and a part is without process The thin mud of sorting enters cleaned coal, cleans ash is affected, while it can not completely replace flotation.Spiral is not enough:Sorting Density is high, and cleaned coal can not reach the cleans ash of final requirement, and its product cannot function as final products sale;Separate unit treating capacity It is little, need multiple stage to use cooperatively, floor space is big, and height is big, while needing to adjust oar and distributor, distributing uniformity to be difficult to control System;Feed thickness is required strictly, to be difficult to control in commercial production.
In prior art, the fluidization technology on chemical industry is incorporated into into Concentrating Field, achieved with good effect.China Utility model patent(The patent No.:ZL200720037745.0)A kind of liquid-solid fluid bed coarse slime size classification grading device is disclosed, The device can reduce coarse slime ash again by the use of coarse slime itself as medium.Using its sedimentation during narrow grade material hindered falling This mainly relevant with the density of granule relation of speed, makes material be sorted in the fluidizing agent for itself being constituted. The desliming devices such as cyclone, high-frequency screen and coal slime centrifuge are adopted using classification eddy flow and after selecting before pan feeding, in final cleaned coal A part of high ash thin mud is yet suffered from, causes the grey thin mud of height in pan feeding seriously polluted to cleaned coal, affect separation results.
The content of the invention
The technical problem to be solved is the defect for overcoming prior art to exist, there is provided a kind of desliming type liquid Solid fluid bed coarse slime separation overflow cleaned coal grading plant, coarse slime overflow product is overflow in liquid-solid fluid bed coarse slime size machine Flow export carries out sedimentation desliming, the height ash thin mud pollution in liquid-solid fluid bed coarse slime size machine overflow is reduced, so as to realize drop Low total cleans ash, improve product quality and coal resources comprehensive utilization ratio.
The desliming type liquid-solid fluid bed coarse slime size overflow cleaned coal grading plant of the present invention, including sorting classifying staving, Fluid distributor and overflow desliming device.
The sorting classifying staving is made up of staving and base cone, base cone it is suitable for reading with staving under mouth airtight connection, mouth under base cone Mine tailing valve is set, the bypass pipe controlled by draw valve is provided with by base cone Xia Kou sides.Staving top is provided with pan feeding sleeve(Feeding mouth), Feeding pipe is enclosed within pan feeding sleeve.
The overflow desliming device, is made up of addendum cone, oblique staving, and the sectional area suitable for reading of oblique staving is more than lower mouth sectional area, Tiltedly staving surrounding suitable for reading arranges overflow launder, and isopipe root arranges overflow pipe.Addendum cone is suitable for reading to be connected on below the side of oblique staving, and oblique Staving seal joining, the lower mouth of addendum cone arranges coarse-fine coal blow-off valve.
The fluid distributor is arranged at the staving bottom of sorting classifying staving, and fluid distributor joins with staving outer connecting pipe It is logical.
Desliming type liquid-solid fluid bed coarse slime size overflow cleaned coal grading plant of the present invention, its course of work is as follows:
During material passes through feeding pipe even into pan feeding sleeve, move downwardly in sorting classifying staving by gravity.Into Progressively move downward after certain distance to the material in sorting classifying staving, material starts to be separated by the height of density, due to oblique The lateral cross-sectional area of staving is up big and down small, and fluid flow velocity during rising slows down gradually, and fine grained moves up through week Side downflow weir enters overflow launder, by close for controlling staving at mouth under the coarse-fine coal blow-off valve and base cone of mouth under addendum cone The mine tailing valve of degree controls the size of spillway discharge.The thin mud of liquid-solid fluid bed coarse slime size Grading Overflow and most of water are through oblique The peripheral overflow weir on staving top is entered in overflow launder, and coarse-fine coal is flowed out by the coarse-fine coal blow-off valve at mouth under addendum cone, real Desliming and the inspissation of liquid-solid fluid bed coarse slime size classifier overflow are showed.Higher density material continues to be moved downwardly to Fluid distributor, enters into fluid bed bed, and density passes through bed higher than the material of fluid bed bed density(Fluid distributor) Enter into bottom, discharging by mine tailing valve becomes mine tailing, and the material of intermediate density in bed through moving back and forth up and down, Jing Separation is done step-by-step after a period of time.The formation of fluidized-bed layer is with pan feeding middle-high density material as medium, with through fluid The ascending water come in distributor is fluid, forms fluid bed bed.
Apparatus of the present invention, reduce the pollution of high ash thin mud in liquid-solid fluid bed coarse slime size machine overflow, and simplify Follow-up desliming dewatering process is sorted, cleans ash is reduced, is reduced pollution, raising separating effect of the high ash thin mud to cleaned coal.Can be real Sort in high precision under existing low-density, cleaned coal is less by thin mud pollution, and cleans ash is lower, when pan feeding ash is below 25%, point Cleans ash after choosing is suitable with gravity treatment and floatation clean coal ash content or lower.
Description of the drawings
Fig. 1 is desliming type liquid-solid fluid bed coarse slime size overflow cleaned coal grading plant structural representation of the present invention.
In figure:1- overflow pipes, 2- addendum cones, the coarse-fine coal blow-off valves of 3-, 4- upper barrel bodies, 5- flanges, 6- fluid distributors, 7- is put Ore deposit valve, 8- mine tailing valves, 9- base cones, 10- lower barrel bodies, 11- pan feeding sleeves, 12- feeding pipes, the oblique stavings of 13-, 14- overflow launders.
Specific embodiment
Embodiments of the invention are further described below in conjunction with the accompanying drawings:
As shown in Fig. 1, desliming type liquid-solid fluid bed coarse slime size overflow cleaned coal grading plant of the present invention, by sorting classifying bucket Body, overflow desliming device and fluid distributor 6 are constituted.The sorting classifying staving, by upper barrel body 4, lower barrel body 10 and the structure of base cone 9 It is connected as a single entity by flange into, upper barrel body and lower barrel body, the lower mouth of the suitable for reading and lower barrel body of base cone 9 is connected, and fluid distributor sets Put between base cone 9 and lower barrel body 10, fluid distributor is communicated with outer connecting pipe.Fluid distributor is prior art, and China is real Use new patent(The patent No.:ZL200720037745.0)The structure of convection cell distributor has fully open.The top of upper barrel body 4 sets There is pan feeding sleeve(Feeding mouth)11, feeding pipe 12 is enclosed within pan feeding sleeve.Overflow desliming device is by up big and down small oblique of sectional area Staving 13 and addendum cone 2 are constituted.Tiltedly the top peripheral of staving is set with overflow launder 14, and the bottom of overflow launder is provided with an overflow pipe 1. The lower mouth of addendum cone(Outlet)Place is provided with the coarse-fine coal blow-off valve 3 of control coarse slime flow.9 times mouths of base cone(Outlet)Place is provided with control The mine tailing valve 8 of staving density, is provided with the bypass pipe controlled by draw valve 7 by base cone outlet side, so as to the cleaning of mine tailing.
The course of work:During material passes through feeding pipe even into pan feeding sleeve, by gravity sorting point is moved downwardly into In level staving.The material entered in sorting classifying staving is progressively moved downward after certain distance, and material starts by the height of density Low separation, because the lateral cross-sectional area of oblique staving is up big and down small, fluid flow velocity during rising slows down gradually, fine grained to Upper motion enters overflow launder by peripheral overflow weir, by the use at mouth under the coarse-fine coal blow-off valve and base cone of mouth under addendum cone The size of spillway discharge is controlled in the mine tailing valve of control staving density.The thin mud of liquid-solid fluid bed coarse slime size Grading Overflow and big Part water is entered in overflow launder through the peripheral overflow weir on oblique staving top, and coarse-fine coal is by the coarse-fine coal row at mouth under addendum cone Material valve flows out, and realizes desliming and the inspissation of liquid-solid fluid bed coarse slime size classifier overflow.Higher density material after It is continuous to be moved downwardly to fluid distributor, fluid bed bed is entered into, density passes through bed higher than the material of fluid bed bed density (Fluid distributor)Bottom is entered into, discharging by mine tailing valve becomes mine tailing, and the material of intermediate density is passed through in bed Under move back and forth, separation is done step-by-step after a period of time.The formation of fluidized-bed layer is with pan feeding middle-high density material to be situated between Matter, with the ascending water come in fluid distributor as fluid, forms fluid bed bed.

Claims (3)

1. a kind of desliming type liquid-solid fluid bed coarse slime size overflow cleaned coal grading plant, including sorting classifying staving, fluid point Cloth device and overflow desliming device;It is characterized in that:
The sorting classifying staving is made up of staving and base cone, base cone it is suitable for reading with staving under mouth airtight connection, mouth is arranged under base cone Mine tailing valve;Staving top is provided with pan feeding sleeve, and feeding pipe is enclosed within pan feeding sleeve;
The overflow desliming device, is made up of addendum cone, oblique staving, and oblique staving surrounding suitable for reading arranges overflow launder, and isopipe root sets Put overflow pipe;Addendum cone is suitable for reading to be connected on below the side of oblique staving, and with oblique staving seal joining, the lower mouth of addendum cone arranges coarse-fine coal discharge Valve;
The fluid distributor is arranged at the staving bottom of sorting classifying staving, fluid distributor and staving outer connecting pipe UNICOM.
2. desliming type liquid-solid fluid bed coarse slime size overflow cleaned coal grading plant according to claim 1, is characterized in that:Institute The sectional area suitable for reading for stating oblique staving is more than lower mouth sectional area.
3. desliming type liquid-solid fluid bed coarse slime size overflow cleaned coal grading plant according to claim 1, is characterized in that:Institute State and the bypass pipe controlled by draw valve is provided with by base cone Xia Kou sides.
CN201710024070.4A 2017-01-13 2017-01-13 Clay-removing type liquid-solid fluidized bed coarse slime separation overflow clean coal grading device Active CN106669953B (en)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108435406A (en) * 2018-04-04 2018-08-24 中国矿业大学 A kind of separation of coarse slime device with stabilization fluid environment
CN113058753A (en) * 2021-03-30 2021-07-02 中国矿业大学 Underground coal liquid-solid fluidization sorting device

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
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
CN101850293A (en) * 2010-04-23 2010-10-06 中国矿业大学 Coarse coal slime sorting and grading plant for desliming type liquid-solid fluid bed
CN102441479A (en) * 2011-12-20 2012-05-09 华北科技学院 Liquid and solid fluidized bed sorting machine for three products and working method thereof
CN202700634U (en) * 2012-06-08 2013-01-30 柳建志 Coarse slime sorting machine
CN205288668U (en) * 2015-12-22 2016-06-08 大同煤矿集团有限责任公司 Coarse slime sorting machine
CN206492603U (en) * 2017-01-13 2017-09-15 中国矿业大学 Desliming type liquid-solid fluid bed coarse slime size overflow cleaned coal grading plant

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
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
CN101850293A (en) * 2010-04-23 2010-10-06 中国矿业大学 Coarse coal slime sorting and grading plant for desliming type liquid-solid fluid bed
CN102441479A (en) * 2011-12-20 2012-05-09 华北科技学院 Liquid and solid fluidized bed sorting machine for three products and working method thereof
CN202700634U (en) * 2012-06-08 2013-01-30 柳建志 Coarse slime sorting machine
CN205288668U (en) * 2015-12-22 2016-06-08 大同煤矿集团有限责任公司 Coarse slime sorting machine
CN206492603U (en) * 2017-01-13 2017-09-15 中国矿业大学 Desliming type liquid-solid fluid bed coarse slime size overflow cleaned coal grading plant

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108435406A (en) * 2018-04-04 2018-08-24 中国矿业大学 A kind of separation of coarse slime device with stabilization fluid environment
CN108435406B (en) * 2018-04-04 2024-03-15 中国矿业大学 Coarse slime sorting unit with stable fluidization environment
CN113058753A (en) * 2021-03-30 2021-07-02 中国矿业大学 Underground coal liquid-solid fluidization sorting device

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