WO2020098687A1 - 空气干砂选煤***上用排矸***上的负压*** - Google Patents

空气干砂选煤***上用排矸***上的负压*** Download PDF

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Publication number
WO2020098687A1
WO2020098687A1 PCT/CN2019/117946 CN2019117946W WO2020098687A1 WO 2020098687 A1 WO2020098687 A1 WO 2020098687A1 CN 2019117946 W CN2019117946 W CN 2019117946W WO 2020098687 A1 WO2020098687 A1 WO 2020098687A1
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Prior art keywords
negative pressure
valve
discharge pipe
exhaust
gangue
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PCT/CN2019/117946
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English (en)
French (fr)
Inventor
王承奎
王光青
谢皆坤
谢化峰
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王光领
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Publication of WO2020098687A1 publication Critical patent/WO2020098687A1/zh

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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
    • B03B5/00—Washing granular, powdered or lumpy materials; Wet separating
    • B03B5/28—Washing granular, powdered or lumpy materials; Wet separating by sink-float separation
    • B03B5/46—Washing granular, powdered or lumpy materials; Wet separating by sink-float separation using dry heavy media; Devices therefor
    • 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
    • B03B11/00—Feed or discharge devices integral with washing or wet-separating equipment
    • 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
    • B07—SEPARATING SOLIDS FROM SOLIDS; SORTING
    • B07B—SEPARATING SOLIDS FROM SOLIDS BY SIEVING, SCREENING, SIFTING OR BY USING GAS CURRENTS; SEPARATING BY OTHER DRY METHODS APPLICABLE TO BULK MATERIAL, e.g. LOOSE ARTICLES FIT TO BE HANDLED LIKE BULK MATERIAL
    • B07B9/00—Combinations of apparatus for screening or sifting or for separating solids from solids using gas currents; General arrangement of plant, e.g. flow sheets

Definitions

  • the invention belongs to the technical field of coal separation, and particularly relates to a negative pressure system on a gangue discharge system used in an air dry sand coal preparation system.
  • the main purpose of raw coal separation is to separate and separate clean coal and gangue to obtain clean clean coal resources.
  • the main leading technology in this technical field is wet coal preparation. Due to various problems and disadvantages of wet coal preparation, the present invention People have developed an air dry sand coal preparation technology that does not use water.
  • air and dry sand media are used to achieve a fluidized atmosphere, and separation is achieved according to the density difference between clean coal and gangue, where gangue discharge affects the whole
  • the gangue discharge in the dry coal preparation is mainly by fixing the scraper on the chain, and the chain is driven by the transmission wheel. Because the dry coal preparation can make the coal and gangue layered, the gangue will be located in the lower layer due to the higher density, so through the chain The lower scraper can push out the gangue; this structure will discharge the large and small gangue and the medium uniformly when in use, but the chain is easy to get stuck in the gangue, which will cause greater damage to the chain; although there are also separate gangue sizes before collecting Yes, but because the small particles of gangue and the medium contain a lot of impurities, which makes the medium mixed with impurities in the subsequent separation, which affects the subsequent secondary use; therefore, it is necessary to improve.
  • the purpose of the present invention is to provide a negative pressure system on the gangue discharge system used in the air dry sand coal preparation system in view of the deficiencies of the prior art, which has the advantages of not easy to damage the equipment when screening gangue and capable of removing impurities in the medium Features.
  • a negative pressure system on an exhaust dry coal preparation system for air gangue system which includes a negative pressure chamber, an exhaust fan, a media filter screen, a buffer chamber, a suction chamber Feed fan, first valve, second valve and discharge pipe, the discharge pipe is located in the buffer chamber; the first valve is located at the inlet of the discharge pipe, and the second valve is located at the discharge of the discharge pipe
  • the suction fan is located between the first valve and the second valve, and it is in communication with the discharge pipe; the discharge pipe is in communication with the negative pressure chamber; the upper side of the negative pressure chamber is provided with an exhaust port,
  • the exhaust fan is connected to the exhaust port, and a dust removal bag is connected to the rear of the exhaust fan; the media filter screen is provided on the exhaust port; and the bottom of the negative pressure chamber is provided with a discharge port.
  • the exhaust fan is a Roots fan.
  • the first valve and the second valve are both one-way solenoid valves.
  • the position of the exhaust port is higher than the position of the discharge port.
  • the present invention has the advantages compared with the prior art that the present invention is not easy to cause damage to the equipment during use, and the interleaved use of the first valve and the second valve can keep the vacuum suction of the negative pressure chamber stable ;
  • the media filter screen can remove the impurities while preventing the media from being sucked by the exhaust fan.
  • Figure 1 is a schematic diagram of the present invention.
  • a negative pressure system on an exhaust gangue system for an air dry sand coal preparation system which includes a negative pressure chamber 10, an exhaust fan 11, a media filter screen 12, a buffer chamber 13, and a suction material
  • the blower 14, the first valve 15, the second valve 16 and the discharge pipe 17, the discharge pipe 17 has a through structure at both ends, which is located in the buffer chamber, and one end of which is connected to the sorting chamber on the waste discharge system, and the other end It communicates with the negative pressure chamber 10, so that the small particles of gangue and medium discharged from the sorting chamber can be discharged into the negative pressure chamber 10 through the discharge pipe 17.
  • the first valve 15 and the second valve 16 are both one-way solenoid valves.
  • the first valve 15 is located on the inlet of the discharge pipe 17, the second valve 16 is located on the outlet of the discharge pipe 17, and the suction fan 14 is located on the first Between a valve 15 and a second valve 16, and it is connected with the discharge pipe 17; when the suction fan 14 is working, the first valve 15 is opened, the second valve 16 is closed, under the action of the suction fan 14, the suction
  • the feed pipe 17 can absorb small particles of gangue and media at the bottom of the sorting chamber to the inside.
  • the upper side of the negative pressure chamber 10 is provided with an exhaust port, the location of the exhaust port is higher than the position of the discharge port, the exhaust fan 11 is a Roots fan, and is connected to the exhaust port, a dust bag is connected to the rear of the exhaust fan, and the media is filtered
  • the sieve 12 is arranged on the exhaust port. Since the medium is generally iron ore particles, the media filter sieve 12 is generally a magnetic filter sieve; when the exhaust fan 11 is in operation, the first valve 15 is closed and the second valve 16 is opened.
  • the gangue and medium of the pipeline 17 will be sucked into the negative pressure chamber 10, because the gangue and medium have a higher specific gravity, they will fall to the bottom of the negative pressure chamber 10 and be collected through the discharge port; and dust and other impurities will be drawn by the fan 11 Inhaled and collected by the dust bag.
  • the media filter screen can block the media in the negative pressure chamber and collect it from the discharge port after falling.

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  • Combined Means For Separation Of Solids (AREA)

Abstract

一种空气干砂选煤***上用排矸***上的负压***，其包括负压室（10）、抽风机（11）、介质过滤筛（12）、缓冲室（13）、吸料风机（14）、第一阀门（15）、第二阀门（16）及出料管道（17），所述出料管道位于缓冲室内；所述第一阀门位于出料管道的进料口上，所述第二阀门位于出料管道的出料口上；所述吸料风机位于第一阀门与第二阀门之间，且其与出料管道连通；所述出料管道与负压室连通；所述负压室的上侧面设置有抽风口，所述抽风机与抽风口连接，所述抽风机后部连接有除尘袋；所述介质过滤筛设置在抽风口上；所述负压室的底部设置有下料口。该负压***使得筛分矸石时不易损坏设备及能清除介质中杂质。

Description

空气干砂选煤***上用排矸***上的负压*** 技术领域
本发明属于煤炭分选技术领域，尤其是涉及一种空气干砂选煤***上用排矸***上的负压***。
背景技术
原煤分选的主要目的是将精煤与矸石分离、分割，以获取清洁的精煤资源，目前，本技术领域大主导工艺是湿法选煤，因湿法选煤的种种问题弊端，本发明人开发出不用水的空气干砂选煤技术，在空气干砂选煤技术中，利用空气和干砂介质实现流化氛围，根据精煤与矸石的密度差别实现分离，其中排矸是影响整体空气干砂选煤设备能否正常工作、能否实现工业化应用的重要因素之一。
干法选煤中的排矸主要是通过在链条上固定刮板，而链条通过传动轮带动，由于干法选煤能够让煤与矸石分层，因此矸石由于密度较大会位于下层，这样通过链条下层的刮板能将矸石推出；这种结构在使用时会将大小矸石及介质统一排出，但是链条容易卡进矸石，这对链条的损害较大；虽然现在也有将矸石大小分离后再进行收集的，但是由于小颗粒矸石及介质中含有大量杂质，这使得介质在后续分离时会与杂质混合，从而影响后续二次使用；因此有必要予以改进。
发明内容
本发明的目的是针对上述现有技术存在的不足，提供一种空气干砂选煤***上用排矸***上的负压***，它具有筛分矸石时不易损坏设备及能清除 介质中杂质的特点。
为了实现上述目的，本发明所采用的技术方案是：一种空气干砂选煤***上用排矸***上的负压***，其包括负压室、抽风机、介质过滤筛、缓冲室、吸料风机、第一阀门、第二阀门及出料管道，所述出料管道位于缓冲室内；所述第一阀门位于出料管道的进料口上，所述第二阀门位于出料管道的出料口上；所述吸料风机位于第一阀门与第二阀门之间，且其与出料管道连通；所述出料管道与负压室连通；所述负压室的上侧面设置有抽风口，所述抽风机与抽风口连接，所述抽风机后部连接有除尘袋；所述介质过滤筛设置在抽风口上；所述负压室的底部设置有下料口。
所述抽风机为罗茨风机。
所述第一阀门及第二阀门均为单向电磁阀。
所述抽风口的位置高于出料口的位置。
采用上述结构后，本发明和现有技术相比所具有的优点是：本发明在使用中不易对设备造成损害，第一阀门及第二阀门的交错使用能够让负压室的真空吸力保持稳定；介质过滤筛在清除杂质的同时还能防止介质被抽风机吸入。
附图说明
图1是本发明的结构示意图。
具体实施方式
以下所述仅为本发明的较佳实施例，并不因此而限定本发明的保护范围，下面结合附图和实施例对本发明进一步说明。
实施例，见图1所示：一种空气干砂选煤***上用排矸***上的负压***，其包括负压室10、抽风机11、介质过滤筛12、缓冲室13、吸料风机14、 第一阀门15、第二阀门16及出料管道17，出料管道17位两端贯通结构，其位于缓冲室内，且其一端与排矸***上的分选室连通，其另一端与负压室10连通，这样分选室所排出的小颗粒矸石及介质均能通过出料管道17排入负压室10内。第一阀门15与第二阀门16均为单向电磁阀，第一阀门15位于出料管道17的进料口上，第二阀门16位于出料管道17的出料口上，吸料风机14位于第一阀门15与第二阀门16之间，且其与出料管道17连通；在吸料风机14工作时，第一阀门15打开，第二阀门16关闭，在吸料风机14的作用下，吸料管道17能够将分选室底部的小颗粒矸石及介质吸附到其内部。负压室10的上侧面设置有抽风口，抽风口的位置高于出料口的位置，抽风机11为罗茨风机，且与抽风口连接，在抽风机后部连接有除尘袋，介质过滤筛12设置在抽风口上，由于介质一般为铁矿颗粒，所以介质过滤筛12一般为磁性过滤筛；在抽风机11工作时，第一阀门15闭合，第二阀门16打开，此时，吸料管道17的矸石及介质会被吸入到负压室10内，由于矸石及介质比重较重其会掉落到负压室10的底部，并通过下料口收集；而灰尘等杂质会被抽风机11吸入并被除尘袋收集，同时，为了防止小颗粒介质被抽风机11吸入，介质过滤筛能够将介质阻隔在负压室内，在掉落后再从下料口收集。

Claims (4)

  1. 一种空气干砂选煤***上用排矸***上的负压***，其特征在于：包括负压室、抽风机、介质过滤筛、缓冲室、吸料风机、第一阀门、第二阀门及出料管道，所述出料管道位于缓冲室内；所述第一阀门位于出料管道的进料口上，所述第二阀门位于出料管道的出料口上；所述吸料风机位于第一阀门与第二阀门之间，且其与出料管道连通；所述出料管道与负压室连通；所述负压室的上侧面设置有抽风口，所述抽风机与抽风口连接，所述抽风机后部连接有除尘袋；所述介质过滤筛设置在抽风口上；所述负压室的底部设置有下料口。
  2. 根据权利要求1所述的空气干砂选煤***上用排矸***上的负压***，其特征在于：所述抽风机为罗茨风机。
  3. 根据权利要求1或2所述的空气干砂选煤***上用排矸***上的负压***，其特征在于：所述第一阀门及第二阀门均为单向电磁阀。
  4. 根据权利要求3所述的空气干砂选煤***上用排矸***上的负压***，其特征在于：所述抽风口的位置高于出料口的位置。
PCT/CN2019/117946 2018-11-14 2019-11-13 空气干砂选煤***上用排矸***上的负压*** WO2020098687A1 (zh)

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CN109317303A (zh) * 2018-11-14 2019-02-12 王光领 空气干砂选煤***上用排矸***上的负压***

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CN109317303A (zh) * 2018-11-14 2019-02-12 王光领 空气干砂选煤***上用排矸***上的负压***
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