WO2020181618A1 - 一种井下选煤工艺 - Google Patents

一种井下选煤工艺 Download PDF

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Publication number
WO2020181618A1
WO2020181618A1 PCT/CN2019/083665 CN2019083665W WO2020181618A1 WO 2020181618 A1 WO2020181618 A1 WO 2020181618A1 CN 2019083665 W CN2019083665 W CN 2019083665W WO 2020181618 A1 WO2020181618 A1 WO 2020181618A1
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Prior art keywords
coal
sieve
slime
medium
coarse
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PCT/CN2019/083665
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English (en)
French (fr)
Inventor
桂夏辉
刘敏
邢耀文
夏阳超
曹亦俊
罗佳倩
刘培坤
王志刚
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Jinyitong Sci&tech Beijing
China University of Mining and Technology CUMT
China University of Mining and Technology Beijing CUMTB
Shandong University of Science and Technology
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Jinyitong Sci&tech Beijing
China University of Mining and Technology CUMT
China University of Mining and Technology Beijing CUMTB
Shandong University of Science and Technology
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Application filed by Jinyitong Sci&tech Beijing, China University of Mining and Technology CUMT, China University of Mining and Technology Beijing CUMTB, Shandong University of Science and Technology filed Critical Jinyitong Sci&tech Beijing
Priority to US17/059,476 priority Critical patent/US11396024B2/en
Priority to CA3099448A priority patent/CA3099448C/en
Publication of WO2020181618A1 publication Critical patent/WO2020181618A1/zh
Anticipated expiration legal-status Critical
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B03—SEPARATION 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
    • B03B—SEPARATING SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS
    • B03B9/00—General arrangement of separating plant, e.g. flow sheets
    • B03B9/005—General arrangement of separating plant, e.g. flow sheets specially adapted for coal
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B03—SEPARATION 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
    • B03B—SEPARATING SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS
    • B03B7/00—Combinations of wet processes or apparatus with other processes or apparatus, e.g. for dressing ores or garbage
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B03—SEPARATION 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
    • B03B—SEPARATING SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS
    • B03B5/00—Washing granular, powdered or lumpy materials; Wet separating
    • B03B5/02—Washing granular, powdered or lumpy materials; Wet separating using shaken, pulsated or stirred beds as the principal means of separation
    • B03B5/10—Washing granular, powdered or lumpy materials; Wet separating using shaken, pulsated or stirred beds as the principal means of separation on jigs

Definitions

  • the invention relates to an underground coal preparation process, and is particularly suitable for an underground coal preparation process using dry-wet combined coal preparation in the coal sorting field.
  • the existing underground coal preparation methods include dry coal preparation represented by wind coal preparation and dense medium fluidized bed coal preparation, and wet coal preparation represented by jigging coal preparation and heavy medium cyclone coal preparation.
  • dry coal preparation uses air or air as the separation medium.
  • the advantage is that it saves a lot of water resources, reduces equipment investment and energy consumption, is efficient and environmentally friendly, and simplifies the separation process.
  • the disadvantage is that Strong dependence on environmental stability, relatively high requirements for raw coal moisture, and higher separation particle size; wet coal separation uses water and heavy medium suspension as the separation medium, with high separation accuracy, low separation particle size, and mature technology.
  • the aqueous medium underground coal preparation process of the present invention has the following steps:
  • TDS intelligent dry separator B Feed the sieving material larger than 25mm into TDS intelligent dry separator B for dry coal separation. After separation, dry cleaned coal and dry gangue are discharged;
  • the material under the grading sieve of less than 25mm is fed into the underground special compact jig machine C for sorting, and the underground special compact jig machine C sorts out the jigging machine overflow clean coal, jigging medium coal and jigging gangue.
  • the jigging gangue is directly discharged; because the water content of the overflow clean coal of the jig machine is large, the overflow clean coal of the jig machine is fed into the fixed screen D for pre-dehydration. After the pre-dehydration, the over-screen and under-the-screen water of the clean coal is obtained.
  • the water under the sieve is fed into the slime pool I, and the oversize of the fixed sieve of the clean coal is fed into the ⁇ 13mm grading sieving to obtain lump clean coal with an upper sieve greater than 13mm and a lumps less than 13mm under the sieve, and lump clean coal with an upper sieve greater than 13mm.
  • the water content is discharged as a clean coal product.
  • the clean coal with a thickness of less than 13mm under the sieve is fed into the clean coal centrifugal dehydrator G for dehydration to obtain centrifugal dehydrator clean coal and centrifugal liquid I.
  • the centrifugal dehydrator clean coal is discharged as a clean coal product and centrifuged Liquid I is fed into the slime pool I; the jigging mid-coal is fed to a ⁇ 13mm grading screen F for sorting, and the sorting obtains mid-coal larger than 13mm on the sieve and mid-coal smaller than 13mm under the sieve.
  • Dewatering is directly discharged as a mid-coal product.
  • Mid-coal with a size of less than 13mm under the screen is fed into the mid-coal centrifugal dehydrator H to obtain dehydrated mid-coal and centrifugal liquid II.
  • the dehydrated mid-coal is discharged as a mid-coal product, and the centrifugal liquid II is fed into slime Pool I;
  • the under-sieve water, the centrifugal liquid I and the centrifugal liquid II are mixed in the slime pool I to form the slime water containing coarse slime.
  • the slurry pump U is used to feed the slime water containing coarse slime into the water medium grading separator. After the separation, the water medium is classified and the first stage of the cyclone J is classified to obtain the overflow, and the underflow of the first stage of the cyclone enters the second stage to obtain the overflow containing coarse and refined coal slime and the overflow containing coarse and medium slime.
  • Underflow where the overflow is fed into the mixing tank P for mixing, and the dosing box O is used to add the slime water treatment agent to the mixing tank P.
  • the overflow in the mixing tank P is fully mixed with the slime water treatment agent to obtain the slime water.
  • the agent is flocculation Agents and coagulants and other sedimentation promoting agents, the slime water is fed into the roadway high-efficiency thickener Q for settlement, and after settlement, it is discharged through the outlet at the bottom of the roadway high-efficiency thickener Q.
  • the bottom flow of the thickener is fed into the slime filter press R and discharged after filtration and dehydration.
  • Coal slime and filter press filtrate, filter press filtrate is discharged into the clarification pool S, the outlet above the thickener Q is discharged from the overflow of the thickener to the clarification pool S; the overflow containing coarse fine coal is fed into the coarse coal arc Screening by sieve L, the underflow containing the coarse and medium coal slime is fed to the coarse medium coal arc sieve K for sieving, and the coarse and medium coal arc sieve water and the coarse and medium coal arc sieve water are respectively generated.
  • the under-screen water and the coarse medium coal arc-shaped sieve under-water are fed into the slime pool I again, the coarse and clean coal arc-shaped sieve L and the coarse and medium coal arc-shaped sieve K are the coarse and medium slime
  • the material on the curved sieve is fed into the coarse and medium slime centrifugal dewaterer N and the coarse and medium slime centrifugal dewaterer M respectively for dewatering, and finally produces coarse and fine slime, coarse and medium slime and centrifugal liquid IV and centrifugal liquid III.
  • Liquid IV and centrifugal liquid III are fed into the slime pool I to continue circulation.
  • the circulating water generated in the clarification tank S is fed into the downhole special compact jig C through the clean water pump V for use.
  • the model of the downhole special compact jigger C is the JYT-J series
  • the adopted high-efficiency thickener Q model is the YT-N series
  • the specific model parameters are determined according to on-site process requirements.
  • the dry-selected gangue and jigging gangue are used as backfill materials to be directly filled in the well without going to the well, thereby reducing environmental pollution.
  • the invention uses the combined use of dry coal preparation and wet coal preparation to separate bulk materials larger than 25mm by TDS intelligent dry separator, and materials smaller than 25mm are separated by jig and water media cyclones, reducing the amount of raw coal entering water and reducing
  • the phenomenon of raw coal slime does not use the heavy medium separation process, avoids the heavy medium loss caused by the heavy medium coal preparation process, reduces production costs, reduces equipment investment, and simplifies the process flow; no flotation in the underground can save underground space, and at the same time Reduce equipment energy consumption; no flotation agent is used, which effectively reduces the risk of downhole production and improves the downhole production environment;
  • the use of downhole special compact jigs has large equipment processing capacity, and the equipment structure and size are suitable for use in narrow underground spaces , Which can ensure the ability to select raw coal;
  • the water media classification and separation cyclone used is composed of two sections, one cylindrical structure plays a precise classification role, and the two-section cylindrical-conical structure plays a precise classification role.
  • This equipment simplifies The complex coarse slime recovery process on the well, the clean coal and middling coal are transported to the well after the raw coal is separated, and the gangue is used as the underground filling material to reduce the useless energy consumption caused by the gangue transportation, reduce the pollution of the surface environment, and reduce the stability of the underground rock strata caused by coal mining influences.
  • FIG. 1 is a process flow diagram of the present invention
  • Figure 2 is a diagram of the device structure of the present invention.
  • Figure 1 1-raw coal, 2-above the sieve of the grading sieve larger than 25mm, 3-below the sieve of the grading sieve less than 25mm, 4-TDS intelligent dry separator clean coal, 5-dry separation gangue, 6 Overflowing clean coal of jig machine, 7-jigging medium coal, 8-jigging gangue, 9-clean coal fixed sieve tops, 10-sieve water (10), 11-large clean coal larger than 13mm, 12- Clean coal with a size smaller than 13mm under the sieve, 13-medium coal with a size larger than 13mm on the sieve, medium coal with a size smaller than 13mm under the 14 sieve, 15-centrifugal dehydrator clean coal, 16-centrifuge I, 17-dehydrated medium coal, 18- Centrifuge II, 19- to-be-selected slime water, 20-underflow containing coarse and medium slime, 21-overflow containing coarse and refined slime, 22-overflow, 23-overflow of coarse and medium slime
  • the water medium underground coal preparation process of the present invention has the following steps:
  • the underneath 3 of the grading sieve less than 25mm is fed into the underground special compact jig machine C for sorting, and the underground special compact jig machine C sorts out the jig overflow clean coal 6, the jigging medium coal 7 and the jig.
  • Jigging gangue 8 and jig gangue 8 are directly discharged; because the overflow clean coal 6 of the jig machine has a large water content, the overflow clean coal 6 of the jig machine is fed into the fixed screen D for pre-dehydration, and the clean coal fixed screen is obtained after pre-dehydration Screen overs 9 and under sieve water 10, under sieve 10 is ⁇ 1mm clean coal fixed sieve under sieve, under sieve 10 is fed into slime pool I, clean coal fixed sieve 9 is fed into ⁇ 13mm grading sieving to obtain sieve larger than 13mm lump clean coal 11 and 13mm under the sieve are less than 13mm clean coal 12, the lump of clean coal 11 above the sieve is larger than 13mm, the water content is discharged as a clean coal product, and the 13mm clean coal 12 under the sieve is fed into the clean coal centrifugal dehydrator After G is dehydrated, the centrifuged dehydrator clean coal 15 and centrifugal liquid I16 are obtained.
  • the centrifugal dehydrator clean coal 15 is discharged as a clean coal product, and the centrifugal liquid I16 is fed into the slime pool I; the jigging coal 7 is fed into the ⁇ 13mm grading screen F Separate, obtain the medium coal 13 whose upper sieve is larger than 13mm and the medium coal 14 whose lower sieve is smaller than 13mm.
  • the medium coal 13 whose upper sieve is larger than 13mm is directly discharged as a medium coal product without further dehydration.
  • the medium coal 14 whose lower sieve is smaller than 13mm is given to After being dewatered by the centrifugal dehydrator H, the dehydrated medium coal 17 and the centrifugal liquid II 18 are obtained.
  • the dehydrated medium coal 17 is discharged as a medium coal product, and the centrifugal liquid II 18 is fed into the slime pool I;
  • the under-screen water 10, the centrifugal liquid I16 and the centrifugal liquid II 18 are mixed in the slime pool I to form a coal slurry water 19 containing coarse slime.
  • the slurry pump U is used to feed the coal slurry water 19 containing coarse slime into the water medium for classification Separating cyclone J. After the separation, the first stage of the aqueous medium is classified by cyclone J to obtain overflow 22. The underflow of the first stage of cyclone enters into the second stage of separation to obtain overflow 21 containing coarse and refined coal slime.
  • the underflow 20 of the coarse and medium slime in which the overflow 22 is fed into the mixing tank P for mixing, and the dosing box O is used to add the slime water treatment agent 31 to the mixing tank P, the overflow 22 in the mixing tank P and the slime water treatment agent 31 is fully mixed to obtain slime water 32.
  • the agent is flocculant and coagulant and other agents to promote sedimentation.
  • the slime water 32 is fed into the roadway high-efficiency thickener Q for settlement, and after settlement, the thickener underflow 33 is discharged through the outlet at the bottom of the roadway high-efficiency thickener Q.
  • the slime 35 and the filter press filtrate 36 are discharged respectively.
  • the filter press filtrate 36 is discharged into the clarification tank S, and the outlet above the thickener Q is discharged from the thickener overflow 34 to the clarification tank S; the overflow 21 containing coarse clean coal is fed into the coarse clean coal arc sieve L for screening, and the underflow 20 containing the coarse medium slime is fed into the coarse medium coal arc sieve K for screening, respectively to generate coarse clean coal arcs
  • Screen water 26 and coarse medium coal arc screen water 24 coarse clean coal arc screen water 26 and coarse medium coal arc screen water 24 are fed back into slime pool I
  • Coarse fine coal slime arc sieve top 26 and coarse medium coal arc sieve K 23 are fed into coarse fine coal slime centrifugal dewaterer N and coarse medium slime centrifugal dewatering machine respectively M is dehydrated, and finally produces coarse refined coal slime 29, coarse medium coal slime 27, centrifugal liquid IV30, centrifugal liquid III 28, centrifugal liquid IV 30 and centrifugal liquid III 28 are
  • Circulating water 37 is generated in the clarification pool S, and is fed into the downhole special compact jig C through the clean water pump V.
  • the model of the downhole special compact jigger C is the JYT-J series, and the adopted high-efficiency thickener Q model is the YT-N series, and the specific model parameters are determined according to on-site process requirements.
  • the dry selected gangue 5 and jig gangue 8 are used as backfill materials to be directly filled in the well without going to the well, which reduces environmental pollution.

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Abstract

一种水介质井下选煤工艺，将开采后的原煤（1）给入Φ25mm原煤分级筛A进行筛分，将大于25mm的分级筛筛上物（2）进行干法选煤，将小于25mm的分级筛筛下物（3）给入井下专用紧凑型跳汰机C分选，得到跳汰机溢流精煤（6）、跳汰中煤（7）和跳汰矸石（8），跳汰机溢流精煤（6）经筛分、脱水后得到精煤产品，跳汰中煤（7）经筛分、脱水后得到中煤产品，将分选过程中产生的待选煤泥水（19）进行分选，获得粗精煤泥（29）、粗中煤泥（27），并将最终的液体进行循环水处理。

Description

一种井下选煤工艺 技术领域
本发明涉及一种井下选煤工艺，尤其适用于煤炭分选领域利用干法-湿法联合选煤的井下选煤工艺。
背景技术
现有井下选煤方法包括以风力选煤和重介质流化床选煤为代表的干法选煤，及以跳汰选煤和重介质旋流器选煤为代表的湿法选煤。两种选煤方法各有利弊：干法选煤以空气或空气重介质为分选介质，优点是节约大量水资源，降低设备投入和能耗，高效环保，简化分选工艺流程，缺点是对环境稳定性依赖强，对原煤水分要求比较高，分选粒度下限较高；湿法选煤以水和重介质悬浮液为分选介质，分选精度高，分选粒度下限低，技术成熟，是目前应用最多的选煤方法；缺点是重介质消耗较大，管道和设备磨损较快，最重要的问题是产生大量煤泥水，循环水量大，难处理，对周边环境造成较大压力，且不易控制。目前，井上选煤是以湿法为主，干法选煤现场应用的效果较差，以至于建成的干法选煤工艺被闲置或更换，干法选煤大多数情况下是作为预排矸使用。
发明内容
针对现有技术的不足之处，提供一种充分发挥干法和湿法选煤技术优点，分选效率高，科学环保的井下选煤工艺。
为实现上述技术目的，本发明的水介质井下选煤工艺，其步骤如下：
将开采后的原煤通过原煤入料溜槽T给入Φ25mm原煤分级筛A进行筛分，获得粒径大于25mm的分级筛筛上物和粒径小于25mm的分级筛筛下物；
将大于25mm的分级筛筛上物给入TDS智能干选机B进行干法选煤，通过分选之后分别得到干选精煤和干选矸石排出；
将小于25mm的分级筛筛下物给入井下专用紧凑型跳汰机C分选，井下专用紧凑型跳汰机C分选出跳汰机溢流精煤、跳汰中煤和跳汰矸石，跳汰矸石直接排出；由于跳汰机溢流精煤含水量大，因此将跳汰机溢流精煤给入固定筛D预脱水，预脱水后获得精煤固定筛筛上物和筛下水，筛下水给入煤泥水池I，精煤固定筛筛上物给入Φ13mm分级筛分选获得筛上大于13mm的块精煤和筛下小于的13mm的精煤，筛上大于13mm的块精煤含水量作为精煤产品排出，筛下小于的13mm的精煤给入精煤离心脱水机G进行脱水后获得离心脱水机精煤和离心液Ⅰ，离心脱水机精煤作为精煤产品排出，离心液Ⅰ给入煤泥水池I；将跳汰中煤给入Φ13mm分级筛F分选，分选获得筛上大于13mm的中煤和筛下小于13mm的中煤，上大于13mm的中煤不进一步脱水直接作为中煤产品排出，筛下小于13mm的中煤给入中煤离心脱水机H脱水后得到脱水中煤和离心液Ⅱ，脱水中煤作为中煤产品排出，离心液Ⅱ给入煤泥水池I；
筛下水、离心液Ⅰ和离心液Ⅱ在煤泥水池I中混合形成含粗煤泥的待选煤泥水，利用渣浆泵U将含粗煤泥的待选煤泥水给入水介质分级分选旋流器J，分选后水介质分级分选旋流器J的一段分级得到溢流， 旋流器一段底流进入二段分选，得到含有粗精煤泥的溢流和含有粗中煤泥的底流，其中溢流给入搅拌桶P进行搅拌，同时使用加药箱O对搅拌桶P加入煤泥水处理药剂，搅拌桶P中的溢流与煤泥水处理药剂充分混合获得煤泥水，药剂为絮凝剂和凝聚剂等促沉药剂，煤泥水给入巷道高效浓缩机Q进行沉降，沉降后通过巷道高效浓缩机Q底部的出口排出浓缩机底流给入煤泥压滤机R压滤脱水后分别排出煤泥和压滤机滤液，压滤机滤液排入澄清水池S，浓缩机Q上方的出口排出浓缩机溢流给入澄清水池S；含有粗精煤泥的溢流给入粗精煤弧形筛L筛分，含有粗中煤泥的底流给入粗中煤弧形筛K筛分，分别生成粗精煤弧形筛筛下水和粗中煤弧形筛筛下水，粗精煤弧形筛筛下水和粗中煤弧形筛筛下水重新给入煤泥水池I，粗精煤弧形筛L的粗精煤泥弧形筛筛上物和粗中煤弧形筛K的粗中煤泥弧形筛筛上物分别给入粗精煤泥离心脱水机N和粗中煤泥离心脱水机M进行脱水，最终生成粗精煤泥、粗中煤泥和离心液Ⅳ、离心液Ⅲ，离心液Ⅳ和离心液Ⅲ给入煤泥水池I继续循环。
所述澄清水池S中生成的循环水通过清水泵V给入井下专用紧凑型跳汰机C使用。
所述所述井下专用紧凑型跳汰机C的型号为JYT-J系列，所采用道高效浓缩机Q型号为YT-N系列，具体型号参数根据现场工艺需要确定。
所述干选矸石和跳汰矸石均作为回填材料直接填充在井下，不上井，降低了环境的污染。
有益效果：
本发明通过干法选煤和湿法选煤的联合使用，大于25mm大块物料TDS智能干选机分选，小于25mm物料采用跳汰和水介质旋流器分选，原煤入水量减少，减轻原煤泥化现象；不使用重介质分选工艺，避免重介质选煤工艺带来的重介质损耗，降低生产成本，减少设备投入，简化工艺流程；在井下不设浮选可节约井下空间，同时降低设备能耗；不使用浮选药剂，有效降低了井下生产的危险性，改善井下生产环境；采用的井下专用紧凑型跳汰机，设备处理能力大，设备结构和尺寸适于井下狭窄空间使用，可保证原煤的入选能力；采用的水介质分级分选旋流器由两段组成，一段圆筒形结构起精确分级作用，二段圆筒-圆锥形结构起精确分级作用，该设备简化了井上复杂的粗煤泥回收工艺，原煤选后精煤和中煤运输到井上，矸石作为井下充填原料，减少矸石运输带来的无用能耗，减少地表环境污染，降低煤炭开采对地下岩层稳定的影响。
附图说明
图1是本发明的工艺流程图，
图2是本发明的设备结构图。
图1中：1-原煤，2-大于25mm的分级筛筛上物，3-小于25mm的分级筛筛下物，4-TDS智能干法分选机精煤，5-干选矸石，6-跳汰机溢流精煤，7-跳汰中煤，8-跳汰矸石，9-精煤固定筛筛上物，10-筛下水(10)，11-大于13mm的块精煤，12-筛下小于的13mm的精煤，13-筛上大于13mm的中煤，14筛下小于13mm的中煤，15-离心脱水机精煤，16-离心液Ⅰ，17-脱水中煤，18-离心液Ⅱ，19-待选煤泥水，20-含有 粗中煤泥的底流，21-含有粗精煤泥的溢流，22-溢流，23-粗中煤泥弧形筛筛上物，24-粗中煤泥弧形筛筛下水，25-粗精煤泥弧形筛筛上物，26-粗精煤泥弧形筛筛下水，27-煤泥离心脱水机粗中煤泥，28-煤泥离心脱水机离心液，29-煤泥离心脱水机粗精煤泥，30-煤泥离心脱水机离心液，31-煤泥水处理药剂，32-煤泥水，33-浓缩机底流，34-浓缩机溢流水，35-煤泥，36-压滤机滤液,37-循环水。
具体实施方式
下面结合附图对本发明的具体实施方式进行进一步的说明：
如图1和图2所示，本发明的水介质井下选煤工艺，步骤如下：
将开采后的原煤1通过原煤入料溜槽T给入Φ25mm原煤分级筛A进行筛分，获得大于25mm的分级筛筛上物2和小于25mm的分级筛筛下物3；
将大于25mm的分级筛筛上物2给入TDS智能干选机B进行干法选煤，通过分选之后分别得到干选精煤4和干选矸石5排出；
将小于25mm的分级筛筛下物3给入井下专用紧凑型跳汰机C分选，井下专用紧凑型跳汰机C分选出跳汰机溢流精煤6、跳汰中煤7和跳汰矸石8，跳汰矸石8直接排出；由于跳汰机溢流精煤6含水量大，因此将跳汰机溢流精煤6给入固定筛D预脱水，预脱水后获得精煤固定筛筛上物9和筛下水10，筛下水10为Φ1mm精煤固定筛筛下水，筛下水10给入煤泥水池I，精煤固定筛筛上物9给入Φ13mm分级筛分选获得筛上大于13mm的块精煤11和筛下小于的13mm的精煤12，筛上大于13mm的块精煤11含水量作为精煤产品排出，筛下小于的13mm的精煤12给入精煤离心脱水机G进行脱水后获得离心脱水机精煤15和离心液Ⅰ16，离心脱水机精煤15作为精煤产品排出，离心液Ⅰ16给入煤泥水池I；将跳汰中煤7给入Φ13mm分级筛F分选，分选获得筛上大于13mm的中煤13和筛下小于13mm的中煤14，上大于13mm的中煤13不进一步脱水直接作为中煤产品排出，筛下小于13mm的中煤14给入中煤离心脱水机H脱水后得到脱水中煤17和离心液Ⅱ18，脱水中煤17作为中煤产品排出，离心液Ⅱ18给入煤泥水池I；
筛下水10、离心液Ⅰ16和离心液Ⅱ18在煤泥水池I中混合形成含粗煤泥的待选煤泥水19，利用渣浆泵U将含粗煤泥的待选煤泥水19给入水介质分级分选旋流器J，分选后水介质分级分选旋流器J的一段分级得到溢流22，旋流器一段底流进入二段分选，得到含有粗精煤泥的溢流21和含有粗中煤泥的底流20，其中溢流22给入搅拌桶P进行搅拌，同时使用加药箱O对搅拌桶P加入煤泥水处理药剂31，搅拌桶P中的溢流22与煤泥水处理药剂31充分混合获得煤泥水32，药剂为絮凝剂和凝聚剂等促沉药剂，煤泥水32给入巷道高效浓缩机Q进行沉降，沉降后通过巷道高效浓缩机Q底部的出口排出浓缩机底流33给入煤泥压滤机R压滤脱水后分别排出煤泥35和压滤机滤液36，压滤机滤液36排入澄清水池S，浓缩机Q上方的出口排出浓缩机溢流34给入澄清水池S；含有粗精煤泥的溢流21给入粗精煤弧形筛L筛分，含有粗中煤泥的底流20给入粗中煤弧形筛K筛分，分别生成粗精煤弧形筛筛下水26和粗中煤弧形筛筛下水24， 粗精煤弧形筛筛下水26和粗中煤弧形筛筛下水24重新给入煤泥水池I，粗精煤弧形筛L的粗精煤泥弧形筛筛上物26和粗中煤弧形筛K的粗中煤泥弧形筛筛上物23分别给入粗精煤泥离心脱水机N和粗中煤泥离心脱水机M进行脱水，最终生成粗精煤泥29、粗中煤泥27和离心液Ⅳ30、离心液Ⅲ28，离心液Ⅳ30和离心液Ⅲ28给入煤泥水池I继续循环。所述澄清水池S中生成循环水37，并通过清水泵V给入井下专用紧凑型跳汰机C使用。所述所述井下专用紧凑型跳汰机C的型号为JYT-J系列，所采用道高效浓缩机Q型号为YT-N系列，具体型号参数根据现场工艺需要确定。所述干选矸石5和跳汰矸石8均作为回填材料直接填充在井下，不上井，降低了环境的污染。

Claims (4)

  1. 一种水介质井下选煤工艺，其特征在于步骤如下：
    将开采后的原煤(1)通过原煤入料溜槽T给入Φ25mm原煤分级筛A进行筛分，获得大于25mm的分级筛筛上物(2)和小于25mm的分级筛筛下物(3)；
    将大于25mm的分级筛筛上物(2)给入TDS智能干选机B进行干法选煤，通过分选之后分别得到干选精煤(4)和干选矸石(5)排出；
    将小于25mm的分级筛筛下物(3)给入井下专用紧凑型跳汰机C分选，井下专用紧凑型跳汰机C分选出跳汰机溢流精煤(6)、跳汰中煤(7)和跳汰矸石(8)，跳汰矸石(8)直接排出；由于跳汰机溢流精煤(6)含水量大，因此将跳汰机溢流精煤(6)给入固定筛D预脱水，预脱水后获得精煤固定筛筛上物(9)和筛下水(10)，筛下水(10)为Φ1mm精煤固定筛筛下水，筛下水(10)给入煤泥水池I，精煤固定筛筛上物(9)给入Φ13mm分级筛分选获得筛上大于13mm的块精煤(11)和筛下小于的13mm的精煤(12)，筛上大于13mm的块精煤(11)含水量作为精煤产品排出，筛下小于的13mm的精煤(12)给入精煤离心脱水机G进行脱水后获得离心脱水机精煤(15)和离心液Ⅰ(16)，离心脱水机精煤(15)作为精煤产品排出，离心液Ⅰ(16)给入煤泥水池I；将跳汰中煤(7)给入Φ13mm分级筛F分选，分选获得筛上大于13mm的中煤(13)和筛下小于13mm的中煤(14)，上大于13mm的中煤(13)不进一步脱水直接作为中煤产品排出，筛下小于13mm的中煤(14)给入中煤离心脱水机H脱水后得到脱水中煤(17)和离心液Ⅱ(18)，脱水中煤(17)作为中煤产品排出，离心液Ⅱ(18)给入煤泥水池I；
    筛下水(10)、离心液Ⅰ(16)和离心液Ⅱ(18)在煤泥水池I中混合形成含粗煤泥的待选煤泥水(19)，利用渣浆泵U将含粗煤泥的待选煤泥水(19)给入水介质分级分选旋流器J，分选后水介质分级分选旋流器J的一段分级得到溢流(22)，旋流器一段底流进入二段分选，得到含有粗精煤泥的溢流(21)和含有粗中煤泥的底流(20)，其中溢流(22)给入搅拌桶P进行搅拌，同时使用加药箱O对搅拌桶P加入煤泥水处理药剂(31)，搅拌桶P中的溢流(22)与煤泥水处理药剂(31)充分混合获得煤泥水(32)，药剂为絮凝剂和凝聚剂等促沉药剂，煤泥水(32)给入巷道高效浓缩机Q进行沉降，沉降后通过巷道高效浓缩机Q底部的出口排出浓缩机底流(33)给入煤泥压滤机R压滤脱水后分别排出煤泥(35)和压滤机滤液(36)，压滤机滤液(36)排入澄清水池S，浓缩机Q上方的出口排出浓缩机溢流(34)给入澄清水池S；含有粗精煤泥的溢流(21)给入粗精煤弧形筛L筛分，含有粗中煤泥的底流(20)给入粗中煤弧形筛K筛分，分别生成粗精煤弧形筛筛下水(26)和粗中煤弧形筛筛下水(24)，粗精煤弧形筛筛下水(26)和粗中煤弧形筛筛下水(24)重新给入煤泥水池I，粗精煤弧形筛L的粗精煤泥弧形筛筛上物(26)和粗中煤弧形筛K的粗中煤泥弧形筛筛上物(23)分别给入粗精煤泥离心脱水机N和粗中煤泥离心脱水机M进行脱水，最终生成粗精煤泥(29)、粗中煤泥(27)和离心液Ⅳ(30)、离心液Ⅲ(28)，离心液Ⅳ(30)和离心液Ⅲ(28)给入煤泥水池I继续循环。
  2. 根据权利要求1所述的水介质井下选煤工艺，其特征在于：所述澄清水池S中生成循环水(37)，并通过清水泵V给入井下专用紧凑型跳汰机C使用。
  3. 根据权利要求1所述的水介质井下选煤工艺，其特征在于：所述所述井下专用紧凑型跳汰机C的型号为JYT-J系列，所采用道高效浓缩机Q型号为YT-N系列，具体型号参数根据现场工艺需要确定。
  4. 根据权利要求1所述的水介质井下选煤工艺，其特征在于：所述干选矸石(5)和跳汰矸石(8)均作为回填材料直接填充在井下，不上井，降低了环境的污染。
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