WO2020098692A1 - 空气干砂选煤系统上用选煤排矸系统 - Google Patents

空气干砂选煤系统上用选煤排矸系统 Download PDF

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Publication number
WO2020098692A1
WO2020098692A1 PCT/CN2019/117963 CN2019117963W WO2020098692A1 WO 2020098692 A1 WO2020098692 A1 WO 2020098692A1 CN 2019117963 W CN2019117963 W CN 2019117963W WO 2020098692 A1 WO2020098692 A1 WO 2020098692A1
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Prior art keywords
gangue
negative pressure
suction
pressure chamber
coal
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PCT/CN2019/117963
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English (en)
French (fr)
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王光青
王承奎
谢皆坤
谢化峰
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王光领
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Publication of WO2020098692A1 publication Critical patent/WO2020098692A1/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
    • B07B1/00—Sieving, screening, sifting, or sorting solid materials using networks, gratings, grids, or the like
    • B07B1/12—Apparatus having only parallel elements
    • B07B1/16—Apparatus having only parallel elements the elements being movable and in other than roller form
    • 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
    • B07B1/00—Sieving, screening, sifting, or sorting solid materials using networks, gratings, grids, or the like
    • B07B1/46—Constructional details of screens in general; Cleaning or heating of screens
    • 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 coal 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 the gangue layered, the gangue will be located in the lower layer due to the higher density, so through the lower layer of the chain The scraper can push the gangue; but this way because the chain is located in the mixture of medium, coal and gangue, etc., the coal and gangue are easily caught between the transmission wheel and the chain, which damages the chain more or less The broken pieces easily enter the transmission wheel, which affects the rotation of the transmission wheel and even gets stuck, which makes the coal preparation work impossible, the work efficiency is low, and the overall maintenance cost is also large; In addition, because the scraper continuously rotates following the chain, When the scraper moves to the bottom of the sorting room, a small piece of gangue, especially flakes, will be scraped into the gas distribution plate, causing great damage to the gas distribution plate, destroying the ventilation uniformity of the gas distribution plate, maintenance The higher
  • the purpose of the present invention is to provide a coal preparation waste discharge system for air dry sand coal preparation system in view of the deficiencies of the prior art, which has the characteristics of convenient screening, less damage to equipment and improved screening efficiency.
  • the technical scheme adopted by the present invention is: a coal gangue discharge system used on an air dry sand coal preparation system, which is characterized by comprising a sorting room, a gangue screening system, a gangue pushing system, a gangue suction Material system and gangue negative pressure system;
  • the gangue sieving system includes a bottom sieve layer and a side sieve layer, the bottom sieve layer is located in the sorting chamber, the side sieve layer is located on both sides of the bottom sieve layer, and has a certain distance between the bottom sieve layer Inclination; the bottom screen layer and the side screen layer are composed of screen bars, and there is a certain blanking screen gap between adjacent screen bars;
  • the gangue pushing system is composed of a mobile base, a rotating rod, a row of gangue claws, a positioning baffle, a top rod and a return rod.
  • the mobile base is slidably set in the sorting room, and the rotating rod is rotatably set on the mobile base , And it is provided with a linkage plate, the linkage plate is used in cooperation with the top rod and the return rod, and it drives the rotary rod to rotate after being stressed;
  • the positioning baffle is fixed on the moving base, and it is discharged with the waste Claw positioning and matching;
  • the row of gangue claws is fixedly arranged on the rotating rod and linked with it, and its end is exposed to the upper part of the bottom screen layer;
  • the gangue suction system is composed of a feeding tube, a suction tube and a moving device.
  • the suction tube is provided at the bottom of the sorting chamber and its end is fixedly connected to the mobile base.
  • the bottom of the suction tube is provided with a suction Feed hole, the feed pipe and the suction pipe are fixedly connected and communicate therebetween; a hose is connected to the tail end of the feed pipe, and the end of the hose is connected to a gangue negative pressure system; the feed pipe is connected to The mobile device is connected and moves back and forth under the control of the mobile device;
  • the gangue negative pressure system is composed of a negative pressure chamber and an exhaust fan, the feed port on the negative pressure chamber communicates with a hose; the exhaust fan is fixedly arranged on the negative pressure chamber; the bottom of the negative pressure chamber Equipped with a discharge port.
  • a filter sieve is provided on the exhaust port of the exhaust fan.
  • a buffer chamber is provided in the negative pressure chamber, and a buffer pipe, a first valve, and a second valve are provided in the buffer chamber.
  • the feed end of the buffer pipe is connected to the hose, and the first valve is located at the feed end
  • the discharge end of the buffer pipe communicates with the negative pressure chamber, and the second valve is located on the discharge end.
  • the present invention has the advantages compared with the prior art that: under the action of the blower and the gas distribution plate, the present invention will stratify the coal and gangue in the medium, and the large-particle gangue will pass through the gangue sieve After being sieved by the sub-system, it is pushed out and collected by the gangue propulsion system; the small particles of gangue and medium are collected by the gangue suction system after being absorbed into the negative pressure chamber; this structure is not easy to damage the equipment compared to the existing one. Moreover, the gangue discharge is relatively smooth and the screening efficiency is high.
  • Figure 1 is a schematic diagram of the present invention.
  • a coal gangue discharge system for air dry sand coal preparation system which includes a sorting chamber 10, a gas distribution plate 11, a blower 12, a gangue screening system, a gangue pushing system, and gangue Suction system and gangue negative pressure system;
  • the gas distribution plate 11 is located at the bottom of the sorting chamber 10, which has an air pressure chamber, the wind pressure chamber communicates with the blower 12, so as to provide the separation chamber 10 with the wind power to separate the coal.
  • the medium forms a fluid form under the action of the coal, the coal density will be lower than the dry sand medium, so it will be located in the upper layer of the sorting chamber 10 for collection.
  • the gangue sieving system includes a bottom sieve layer 20 and a side sieve layer 21.
  • the bottom sieve layer 20 is located in the sorting chamber 10, and the side sieve layer 21 is located on both sides of the bottom sieve layer 20.
  • a certain inclination; the bottom screen layer 20 and the side screen layer 21 are composed of screen bars, and there is a certain blanking screen gap between adjacent screen bars; the blanking gap can block large particles of gangue on its upper end surface, let The small particles of gangue and medium fall into the bottom of the sorting chamber 10, so as to achieve the role of sieving and collection.
  • the medium mentioned above generally uses granular ore containing iron.
  • the gangue pushing system is composed of a mobile base 30, a rotating rod 31, a row of gangue claws 32, a positioning baffle, a top rod 33 and a return rod 34.
  • the mobile base 30 is slidably arranged in the sorting chamber 10, and the rotating rod 31 is on the mobile base 30 is set to rotate, and a linkage plate 35 is provided on the linkage plate 35, and the linkage plate 35 is used in cooperation with the top rod 33 and the return rod 34, respectively, and after the force is applied, the rotary rod 31 is rotated;
  • the positioning baffle is fixed on the mobile base 10 , And it is positioned and matched with the gangue claw 32;
  • the gangue claw 32 is fixedly arranged on the rotating rod 31 and linked with it, and its end is exposed above the bottom screen layer 20; when working, the movement of the mobile base 30 can drive the gangue
  • the claw 32 moves (at this time, the discharge gangue 32 is in contact with the positioning baffle to reach the limit position), the discharge
  • the rotation of the linkage plate 35 will drive the rotary rod 31 to rotate, and the rotation of the rotary rod 31 will drive the exhaust
  • the gangue 32 rotates downward so that it is located at the lower part of the bottom sieve layer 20, so that when the moving base 30 returns to the position, it can make the return position smoother; when the moving base 30 returns to the original position, the return lever 34 will resist
  • the linkage rod 35 allows the linkage rod 35 to drive the rotation 31 to reversely rotate, so that the upper end of the gangue claw 32 returns above the bottom screen layer 20 for the next gangue pushing operation.
  • the gangue suction system is composed of a feeding tube 40, a suction tube 41 and a moving device.
  • the suction tube 41 is provided at the bottom of the sorting chamber 10 and its end is fixedly connected to the mobile base 30.
  • the suction tube 41 is provided with a suction at the bottom Feed hole 411, the feed pipe 40 and the suction pipe 41 are fixedly connected and communicate therebetween; a hose 42 is connected to the tail end of the feed pipe 40, and the end of the hose 42 is connected to the gangue negative pressure system; the feed pipe 40 and the mobile
  • the device is connected and moves back and forth under the control of the mobile device;
  • the mobile device is composed of a driving motor 43, a ball screw 44 and a connecting base 45, the ball screw 44 is connected to the driving motor 43, and one end of the connecting base 45 is connected to the ball screw 44 ,
  • the other end is connected to the feed tube 40; when working, the driving motor 43 drives the ball screw 44 to rotate, the ball screw 44 drives the connection base
  • the gangue negative pressure system is composed of a negative pressure chamber 50 and an exhaust fan 51.
  • the feed port on the negative pressure chamber 50 communicates with the hose 42; the exhaust fan 51 is fixedly installed on the negative pressure chamber 50 at the bottom of the negative pressure chamber 50 There is a discharge port; when working, the exhaust fan 51 will extract the air in the negative pressure chamber 50 to make it reach the negative pressure state.
  • the suction pipe 41 Under the effect of the negative pressure, the suction pipe 41 will have a suction force to absorb small particles of gangue and Medium; when the small particles of gangue and medium reach the negative pressure chamber 50, they can be collected through the discharge port on it.
  • a filter screen 52 is provided on the suction port of the suction fan 51, and the filter screen 52 can block the medium so that it is carried away by the suction fan 51.
  • a buffer chamber 53 is provided in the negative pressure chamber 50.
  • the buffer chamber 53 is provided with a buffer pipe 54, a first valve 55, and a second valve 56, the feed end of the buffer pipe 54 is connected to the hose 42, and the first valve 55 is located on the feed end; the discharge end of the buffer pipe 54 communicates with the negative pressure chamber 50, and the second valve 56 is located on the discharge end; when the exhaust fan 51 is working, first close the first valve 55, and open the second valve 56.

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  • Air Transport Of Granular Materials (AREA)
  • Combined Means For Separation Of Solids (AREA)

Abstract

一种空气干砂选矿系统上用选煤排矸系统，其包括分选室（10）、配气板（11）、吹风机（12）、矸石筛分系统、矸石推动系统、矸石吸料系统及矸石负压系统；所述配气板位于分选室的底部，所述吹风机与配气板使用配合；所述矸石筛分系统与矸石推动系统使用配合；所述矸石吸料系统的一端与矸石推动系统连接，另一端与矸石负压系统连通。该系统筛选方便、不易损害设备及提高筛选效率。

Description

空气干砂选煤系统上用选煤排矸系统 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系统上用选煤排矸系统。
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；但是这种方式由于链条位于介质、煤块及矸石等混合物料中，传动轮与链条之间容易卡入煤块和矸石，这对链条损害较大，或者较小的碎块容易进入到传动轮内部，影响传动轮的转动甚至卡死，导致选煤工作无法进行，工作效率低，整体的维修成本也较大；另外，由于刮板是跟随链条不断转动的，在刮板移动到分选室下方时，会将小块的尤其是片状的矸石刮送到配气板内，对配气板造成很大的损坏，破坏配气板的透气均匀性，维修成本较高，整体的工作效率被拉低；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系统上用选煤排矸系统，它具有筛选方便、不易损害设备及提高筛选效率的特点。
为了实现上述目的，本发明所采用的技术方案是：一种空气干砂选煤系统上用选煤排矸系统，其特征在于：包括分选室、矸石筛分系统、矸石推动系统、矸石吸料系统及矸石负压系统；
所述矸石筛分系统包括底筛层及侧筛层所构成，所述底筛层位于分选室内，所述侧筛层位于底筛层的两侧，且与底筛层之间具有一定的倾斜度；所述底筛层及侧筛层均由筛棒构成，相邻筛棒之间具有一定的落料筛缝；
所述矸石推动系统由移动底座、旋转杆、排矸爪、定位挡板、顶杆及回位杆所构成，所述移动底座在分选室内滑动设置，所述旋转杆在移动底座上转动设置，且其上设置有联动板，所述联动板分别与顶杆及回位杆使用配合，且其受力后带动旋转杆转动；所述定位挡板固定在移动底座上，且其与排矸爪定位配合；所述排矸爪固定设置在旋转杆上并与其联动，且其端部露出底筛层的上部；
所述矸石吸料系统由送料管、吸料管及移动装置所构成，所述吸料管设置在分选室的底部且其端部与移动底座固定连接，所述吸料管底部设置有吸料孔，所述送料管与吸料管固定连接且其之间连通；所述送料管的尾端连接有软管，所述软管的端部与矸石负压系统连接；所述送料管与移动装置连接并在移动装置的控制下前后移动；
所述矸石负压系统由负压室及抽风机所构成，所述负压室上的进料口与软管连通；所述抽风机固定设置在负压室上；所述负压室的底部设置有出料 口。
所述抽风机的抽风口上设置有过滤筛。
所述负压室上内设置有缓冲室，所述缓冲室内设置有缓冲管道、第一阀门及第二阀门，所述缓冲管道的进料端与软管连接，且第一阀门位于进料端上；所述缓冲管道的出料端连通负压室，且第二阀门位于出料端上。
采用上述结构后，本发明和现有技术相比所具有的优点是：本发明在吹风机及配气板的作用下，煤会与矸石会在介质中进行分层，大颗粒矸石在经过矸石筛分系统筛分后，再通过矸石推动系统将其推出收集；而小颗粒矸石及介质在被矸石吸料系统吸收入负压室后进行收集；这种结构相比现有的其不易损坏设备，而且排矸较为顺畅、筛分效率高。
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：一种空气干砂选煤系统上用选煤排矸系统，其包括分选室10、配气板11、吹风机12、矸石筛分系统、矸石推动系统、矸石吸料系统及矸石负压系统；配气板11位于分选室10的底部，其上具有风压室，风压室与吹风机12连通，以便为分选室10提供分离煤的风力，在风力的作用下介质形成流体形式后由于煤密度相对干砂介质较小，其会位于分选室10的上层，以进行收集。
矸石筛分系统包括底筛层20及侧筛层21所构成，底筛层20位于分选室10内，侧筛层21位于底筛层20的两侧，且与底筛层20之间具有一定的倾斜 度；底筛层20及侧筛层21均由筛棒构成，相邻筛棒之间具有一定的落料筛缝；落料缝隙能够将大颗粒的矸石阻隔在其上端面，让小颗粒的矸石及介质落入分选室10的底部，从而达到筛分收集的作用。上述的介质一般采用含铁的颗粒状矿石。
矸石推动系统由移动底座30、旋转杆31、排矸爪32、定位挡板、顶杆33及回位杆34所构成，移动底座30在分选室10内滑动设置，旋转杆31在移动底座30上转动设置，且其上设置有联动板35，联动板35分别与顶杆33及回位杆34使用配合，且其受力后带动旋转杆31转动；定位挡板固定在移动底座10上，且其与排矸爪32定位配合；排矸爪32固定设置在旋转杆31上并与其联动，且其端部露出底筛层20的上部；工作时，移动底座30的移动能够带动排矸爪32移动(此时排矸爪32与定位挡板抵接，以达到限位的作用)，排矸爪32能够推动底筛层20落料筛缝上的大颗粒矸石移动，当到达分选室端面矸石出口时即能对大颗粒矸石排出；而此时顶杆33会顶住联动板35并让其转动，联动板35的转动会带动旋转杆31转动，旋转杆31的转动会带动排矸爪32向下转动，使其位于底筛层20的下部，这样当移动底座30回位时即能使得回位较为顺畅；当移动底座30回到原位时，回位杆34会顶住联动杆35，让联动杆35带动旋转31反向转动，使得排矸爪32的上端部回到底筛层20的上方，以进行下一次矸石推动作业。
矸石吸料系统由送料管40、吸料管41及移动装置所构成，吸料管41设置在分选室10的底部且其端部与移动底座30固定连接，吸料管41底部设置有吸料孔411，送料管40与吸料管41固定连接且其之间连通；送料管40的尾端连接有软管42，软管42的端部与矸石负压系统连接；送料管40与移动装置连接并在移动装置的控制下前后移动；移动装置由驱动电机43、滚珠丝 杠44及连接座45所构成，滚珠丝杠44与驱动电机43连接，连接座45一端与滚珠丝杠44连接，其另一端与送料管40连接；工作时，驱动电机43带动滚珠丝杆44转动，滚珠丝杆44带动连接座45移动，同时，与连接座45连接的送料管40会进行移动，并带动吸料管41移动，而吸料管41一边通过吸料孔411吸收小颗粒矸石及介质，一边能够带动移动底座30移动。
矸石负压系统由负压室50及抽风机51所构成，负压室50上的进料口与软管42连通；抽风机51固定设置在负压室50上，在负压室50的底部设置有出料口；工作时，抽风机51会抽取负压室50内的空气，使其达到负压状态，在负压的作用下，吸料管41会具有吸力，以便吸取小颗粒矸石及介质；当小颗粒矸石及介质达到负压室50后，即可通过其上的出料口进行收集。在抽风机51的抽风口上设置有过滤筛52，过滤筛52能够对介质起到阻隔的作用，以便其被抽风机51带走。在负压室50上内设置有缓冲室53，缓冲室53内设置有缓冲管道54、第一阀门55及第二阀门56，缓冲管道54的进料端与软管42连接，且第一阀门55位于进料端上；缓冲管道54的出料端连通负压室50，且第二阀门56位于出料端上；在抽风机51工作时，先关闭第一阀门55，并打开第二阀门56，让负压室50及缓冲管道54内充满真空负压，然后关闭第二阀门56，打开第一阀门55，在真空负压的作用下能够将送料管40内的矸石及介质吸收过来；在需要排料时，关闭第一阀门55，打开第二阀门56，让矸石及介质输送到负压室50内，以便收集，这种结构能够让负压室50保持较为稳定的真空吸力。

Claims (3)

  1. 一种空气干砂选煤系统上用选煤排矸系统，其特征在于：包括分选室、配气板、吹风机、矸石筛分系统、矸石推动系统、矸石吸料系统及矸石负压系统；所述配气板位于分选室的底部，所述吹风机与配气板使用配合；
    所述矸石筛分系统包括底筛层及侧筛层所构成，所述底筛层位于分选室内，所述侧筛层位于底筛层的两侧，且与底筛层之间具有一定的倾斜度；所述底筛层及侧筛层均由筛棒构成，相邻筛棒之间具有一定的落料筛缝；
    所述矸石推动系统由移动底座、旋转杆、排矸爪、定位挡板、顶杆及回位杆所构成，所述移动底座在分选室内滑动设置，所述旋转杆在移动底座上转动设置，且其上设置有联动板，所述联动板分别与顶杆及回位杆使用配合，且其受力后带动旋转杆转动；所述定位挡板固定在移动底座上，且其与排矸爪定位配合；所述排矸爪固定设置在旋转杆上并与其联动，且其端部露出底筛层的上部；
    所述矸石吸料系统由送料管、吸料管及移动装置所构成，所述吸料管设置在分选室的底部且其端部与移动底座固定连接，所述吸料管底部设置有吸料孔，所述送料管与吸料管固定连接且其之间连通；所述送料管的尾端连接有软管，所述软管的端部与矸石负压系统连接；所述送料管与移动装置连接并在移动装置的控制下前后移动；
    所述矸石负压系统由负压室及抽风机所构成，所述负压室上的进料口与软管连通；所述抽风机固定设置在负压室上；所述负压室的底部设置有出料口。
  2. 根据权利要求1所述的空气干砂选煤系统上用选煤排矸系统，其特征 在于：所述抽风机的抽风口上设置有过滤筛。
  3. 根据权利要求1或2所述的空气干砂选煤系统上用选煤排矸系统，其特征在于：所述负压室上内设置有缓冲室，所述缓冲室内设置有缓冲管道、第一阀门及第二阀门，所述缓冲管道的进料端与软管连接，且第一阀门位于进料端上；所述缓冲管道的出料端连通负压室，且第二阀门位于出料端上。
PCT/CN2019/117963 2018-11-14 2019-11-13 空气干砂选煤系统上用选煤排矸系统 WO2020098692A1 (zh)

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