CN115853491A

CN115853491A - Gasification recovery device and recovery method for residual coal at end slope of strip mine

Info

Publication number: CN115853491A
Application number: CN202211323158.3A
Authority: CN
Inventors: 张洪; 蔡忠超; 王子; 杨卓; 刘英璐; 徐贵娃
Original assignee: Ccteg Shenyang Engineering Co ltd
Current assignee: Ccteg Shenyang Engineering Co ltd
Priority date: 2022-10-27
Filing date: 2022-10-27
Publication date: 2023-03-28

Abstract

The invention discloses a gasification recovery device for residual coal at the end edge of an open-pit mine and a recovery method thereof, and the gasification recovery device comprises a trolley, a collecting box, a cleaning component, an air pump, a connecting box and a ventilation component, wherein the top of the trolley is fixedly connected with the collecting box, the inside of the collecting box is fixedly connected with a filter screen, the inside of the collecting box is fixedly connected with a plurality of connecting pipes below the filter screen, and the cleaning component is arranged inside the collecting box and between the filter screen and the connecting pipes.

Description

Gasification recovery device and recovery method for residual coal at end slope of strip mine

Technical Field

The invention belongs to the field of recovery of residual coal gas at the end slope of a strip mine, and particularly relates to a gasification recovery device for residual coal at the end slope of the strip mine and a recovery method thereof.

Background

When the near-horizontal and gentle-slope coal deposit is mined in the open-pit mine, on the exposed side wall between the mining working side wall and the inner drainage working side wall within a certain period, a transportation path is opened towards the side wall along the coal layer and a working face is established, coal outside the deep boundary of the open-pit mine and inside the boundary of the earth surface is mined back by adopting a certain mining method, namely end-wall coal mining, the open-pit end-wall mining is taken as an important branch of the mining industry and bears more and more important coal mining tasks, the nature of the mining task is that overlying rock strata of an ore body is stripped, useful minerals are directly obtained, large and super-large long near-horizontal inner drainage open-pit mines are large in coal yield and stable in coal output, however, due to the limitation of open-pit mine development modes and geological conditions, the end wall of the open-pit mine is slow, the exposed area of the end wall is gradually enlarged, the coal pressing amount of the end wall is large, the inner drainage follow-pit is carried out, and the end-wall coal is buried secondarily and is difficult to be recovered.

In order to recover the end slope coal resources to the maximum extent, before the end slope is buried, equipment such as an auger drill or an end slope coal mining machine is used for recovering partial residual coal according to a certain rule, a certain gas transportation channel is formed in the end slope residual coal, or ground mining fully-mechanized mining equipment is used, the transportation channel is opened up in the end slope coal to construct a gasification channel, the end slope residual coal can be gasified and recovered during open-pit mining, the end slope residual coal can be recovered under the condition of ensuring normal production of a mine, resource waste is avoided, green mining of the end slope residual coal is realized, the conventional gasification recovery has no external collection unit, the efficiency of gas collection in the gasification channel is low under the condition of lacking negative pressure, and the collected gas cannot be pretreated, so that subsequent treatment is relatively troublesome.

The invention content is as follows:

the invention aims to solve the problems in the prior art and provide a gasification and recovery device for residual coal at an end slope of an open pit mine and a recovery method thereof.

In order to solve the above problems, the present invention provides a technical solution:

the utility model provides a strip mine end group incomplete coal gasification recovery unit, includes shallow, collecting box, connecting pipe, moisture absorption filter paper, clean subassembly, air pump, connecting box and subassembly of taking a breath, the top fixedly connected with collecting box of shallow, the inside fixedly connected with filter screen of collecting box, the inside of collecting box just is located a plurality of connecting pipes of below fixedly connected with of filter screen, the inside of collecting box just is located and is provided with clean subassembly between filter screen and the connecting pipe, the inside of collecting box just is located the top sliding connection of filter screen and has the install bin, the inside of install bin is provided with moisture absorption filter paper, the outside fixedly connected with air pump of collecting box, the input fixedly connected with intake pipe of air pump, the one end that the air pump was kept away from to the intake pipe extends to the inside of install bin, the output fixedly connected with blast pipe of air pump, the outside of collecting box just is located the below fixedly connected with connecting box of air pump, the one end that the air pump was kept away from to the blast pipe extends to the inside of connecting box, the inside of connecting box is provided with the subassembly of taking a breath.

As preferred, clean subassembly includes first motor, reciprocal lead screw, mounting panel, gear, pinion rack and brush, the first motor of outside fixedly connected with of collecting box, the output of first motor extends to the inside of shallow and the reciprocal lead screw of fixedly connected with, the one end of reciprocal lead screw is rotated with one side of collecting box inner wall and is connected, the outside threaded connection of reciprocal lead screw has the mounting panel, one side of mounting panel is rotated and is connected with the gear, just be located the below fixedly connected with pinion rack of gear between the both sides of collecting box inner wall, the gear is connected with the pinion rack meshing, one side fixedly connected with brush of mounting panel is kept away from to the gear, the bottom contact of brush and filter screen.

As preferred, the subassembly of taking a breath includes second motor, lead screw, first dog, first gas outlet, second dog, second gas outlet, pipe, quick-operation joint and electron barometer, the outside fixedly connected with second motor of connecting box, the output of second motor extends to the inside and fixedly connected with lead screw of connecting box, the one end of lead screw is rotated with one side of connecting box inner wall and is connected, the outside threaded connection of lead screw has first dog, the outside and the one side threaded connection who is located first dog of lead screw have the second dog, first gas outlet and the second gas outlet of using with first dog and the cooperation of second dog are seted up to the inside of connecting box, the inside equal fixedly connected with pipe of first gas outlet and second gas outlet, two the equal fixedly connected with quick-operation joint in bottom of pipe, two the outside equal fixedly connected with electron barometer of pipe.

Preferably, the top of the cart is detachably connected with two gas collecting bottles, and the two quick connectors are respectively and fixedly connected with the input ends of the corresponding gas collecting bottles.

Preferably, the outside of every connecting pipe all is equipped with the closing plate, inside and the bilateral symmetry that is located the connecting pipe of closing plate are provided with two and insert, the bottom of connecting pipe runs through closing plate and fixedly connected with extension pipe.

Preferably, a dust collection drawer is detachably connected to the inner part of the collection box and below the connecting pipe.

Preferably, the air inlet is formed in the mounting box and above the filter screen, one side of the mounting box extends to the outside of the collecting box and is fixedly connected with the baffle, the top of the collecting box is fixedly connected with an electric telescopic rod, and one end of the electric telescopic rod is fixedly connected with one side of the baffle.

Preferably, the electric cabinet is fixedly connected to one side of the outside of the collecting box, which is far away from the connecting box, the control panel is fixedly connected to the outside of the electric cabinet, and the electric telescopic rod, the first motor, the air pump, the second motor and the electronic barometer are respectively and electrically connected with the control panel.

A use method of a strip mine end slope residual coal gasification recovery device comprises the following steps:

s1, moving equipment to a gasification channel through a cart, inserting extension pipes at the bottom of a connecting pipe into the gasification channel respectively, sealing the gasification channel through a sealing plate, inserting the ground inside the sealing plate into a coal seam to fix the coal seam, starting an air pump through a control panel, pumping air inside a collecting box by matching the air pump with an air inlet pipe, forming negative pressure inside the collecting box, and pumping the air in the gasification channel by matching the connecting pipe with the extension pipes under the action of the negative pressure;

s2, the first motor is started, the first motor drives the reciprocating screw rod to rotate inside the collecting box at the moment, the reciprocating screw rod drives the mounting plate to reciprocate outside the mounting plate, the mounting plate drives the gear and the brush to move in the moving process, the gear rotates on the toothed plate in the moving process, the gear can drive the brush to rotate at the moment, gas entering the collecting box is filtered through the filter screen, attached impurities inside the gas can be filtered by the filter screen, the impurities outside the filter screen can be cleaned through the rotating brush, the cleaned impurities drop downwards to the dust collection drawer to be collected, the filtered gas enters the mounting box through the gas inlet, and the moisture in the gas is adsorbed under the matching of the moisture absorption filter paper;

s3, under the matching of the air pump, the air inlet pipe and the exhaust pipe, the dehumidified air in the installation box can be conveyed into the connection box, at the moment, the air in the connection box enters the corresponding guide pipe through the second air outlet and is conveyed into the air collecting bottle through the guide pipe to be collected, when an electronic air pressure gauge on the guide pipe reaches a set pressure, the second motor drives the lead screw to rotate in the connection box, at the moment, the lead screw drives the second stop block and the first stop block to move, at the moment, the second stop block can seal the second air outlet, meanwhile, the first stop block is moved away from the top of the first air outlet, at the moment, the air in the connection box can enter another air collecting bottle through the first air outlet and the corresponding guide pipe to be collected, and then the air collecting bottle after air collection can be replaced through the quick connector;

s4, shift out the install bin from the inside of collecting box through electric telescopic handle cooperation baffle, can take out the inside moisture absorption filter paper of install bin this moment, change it afterwards can, take out the collection dirt drawer from the inside of collecting box, at this moment can clear up it.

The invention has the beneficial effects that: through inserting the connecting pipe with ground inside stretching into the gasification passageway, and under the effect of air pump, can make the inside formation negative pressure of collecting box, can cooperate the inside gas recovery's of gasification passageway efficiency with higher speed of connecting pipe, and under the cooperation of clean subassembly and filter screen, can carry out the prefilter to the gas of retrieving, can also adsorb its inside moisture through moisture absorption filter paper, and simultaneously, the gas collecting bottle of subassembly cooperation bottom of taking a breath that sets up inside the connecting box uses, can divide the jar to collect, thereby the condition of gas collection interrupt has been avoided.

Description of the drawings:

for ease of illustration, the invention is described in detail by the following detailed description and the accompanying drawings.

FIG. 1 is a schematic view of the overall structure of the present invention;

FIG. 2 is a schematic view of the internal structure of the present invention;

FIG. 3 is an enlarged view of the invention at A in FIG. 2;

fig. 4 is a schematic view of the internal structure of the connection box of the present invention.

In the figure: 1. pushing a cart; 2. a collection box; 3. a dust collection drawer; 4. filtering with a screen; 5. an extension pipe; 6. a sealing plate; 7. inserting the ground; 8. a connecting pipe; 9. installing a box; 10. moisture absorption filter paper; 11. an air inlet; 12. a baffle plate; 13. an electric telescopic rod; 14. a cleaning assembly; 141. a first motor; 142. a reciprocating screw rod; 143. mounting a plate; 144. a gear; 145. a toothed plate; 146. a brush; 15. an air pump; 16. an air inlet pipe; 17. an exhaust pipe; 18. a connecting box; 19. a gas collection bottle; 20. an electric cabinet; 21. a control panel; 22. a ventilation assembly; 221. a second motor; 222. a lead screw; 223. a first stopper; 224. a first air outlet; 225. a second stopper; 226. a second air outlet; 227. a conduit; 228. a quick coupling; 229. an electronic barometer.

The specific implementation mode is as follows:

as shown in fig. 1 to 4, the following technical solutions are adopted in the present embodiment:

implementation 1:

the utility model provides a strip mine end group incomplete coal gasification recovery unit, including shallow 1, collecting box 2, connecting pipe 8, moisture absorption filter paper 10, clean subassembly 14, air pump 15, connecting box 18 and ventilation subassembly 22, the top fixedly connected with collecting box 2 of shallow 1, the inside fixedly connected with filter screen 4 of collecting box 2, can carry out the prefilter to the gas of retrieving, thereby prevent that its inside impurity from leading to the pipeline to block up too much, the inside of collecting box 2 and the below fixedly connected with a plurality of connecting pipes 8 that are located filter screen 4, can stretch into gasification inside the passageway with it, thereby conveniently collect the inside gas of gasification passageway, the inside of collecting box 2 just is located and is provided with clean subassembly 14 between filter screen 4 and the connecting pipe 8, the inside of collecting box 2 just is located the top sliding connection of filter screen 4 has installing box 9, the inside of installing box 9 is provided with moisture absorption filter paper 10, can adsorb the moisture of gas inside through moisture absorption filter paper 10, thereby can increase gaseous purity, the outside fixedly connected with air pump 15 of collecting box 2, the input fixedly connected with intake pipe 16 of collecting box 15, the one end fixedly connected with intake pipe 16 of air pump 15 is kept away from the inside air pump 15, the one end of the air pump 15 extends to the inside air pump 15 of the connecting box, the connecting pipe of the air pump 15 can be provided with the air pump 15, the inside air pump 15 of the air pump 15, the inside of the connecting pipe of the air pump 15 is provided with the air pump 15.

Wherein, the cleaning assembly 14 includes a first motor 141, a reciprocating screw rod 142, a mounting plate 143, a gear 144, a toothed plate 145 and a brush 146, the first motor 141 of outside fixedly connected with of collecting box 2, the output end of the first motor 141 extends to the inside of the cart 1 and the reciprocating screw rod 142 of fixedly connected with, one end of the reciprocating screw rod 142 is connected with one side of the inner wall of the collecting box 2 in a rotating manner, the outside threaded connection of the reciprocating screw rod 142 has the mounting plate 143, one side of the mounting plate 143 is connected with the gear 144 in a rotating manner, the toothed plate 145 is fixedly connected between the two sides of the inner wall of the collecting box 2 and below the gear 144, the gear 144 is connected with the toothed plate 145 in a meshing manner, one side of the mounting plate 143, away from the gear 144, the brush 146 is connected with the bottom of the filter screen 4, the brush 146 is in contact with the bottom of the filter screen 4, the mounting plate 143, the gear 144 and the gear 144 are driven to move by the first motor 141 in a matching manner, and the brush 146 can be driven to rotate, thereby cleaning the bottom of the filter screen 4 can be cleaned, and the ventilation efficiency of the filter screen 4 can be ensured.

The ventilation assembly 22 includes a second motor 221, a lead screw 222, a first stopper 223, a first air outlet 224, a second stopper 225, a second air outlet 226, a conduit 227, a quick coupling 228 and an electronic air pressure meter 229, the second motor 221 is fixedly connected to the outside of the junction box 18, the output end of the second motor 221 extends to the inside of the junction box 18 and is fixedly connected with the lead screw 222, one end of the lead screw 222 is rotatably connected to one side of the inner wall of the junction box 18, the first stopper 223 is connected to the outside of the lead screw 222 through a thread, the second stopper 225 is connected to the outside of the lead screw 222 and is located at one side of the first stopper 223, the first air outlet 224 and the second air outlet 226 which are used in cooperation with the first stopper 223 and the second stopper 225 are arranged inside the junction box 18, the conduit 227 is fixedly connected to the inside of the first air outlet 224 and the second air outlet 226, the quick coupling 228 is fixedly connected to the bottom of the two conduits 227, the electronic air pressure meter 229 is fixedly connected to the outside of the two conduits 227, the conduit 227 is used in cooperation with the lead screw 222, the second motor 221, the gas collection bottle 19 can be used by adjusting the position of the first stopper 223 and the second stopper 225, thereby the gas collection bottle can be used for controlling the gas collection bottle, and the gas collection bottle 19, and the gas collection bottle can be prevented from being affected by the gas collection bottle from being carried out.

Wherein, the top of shallow 1 can be dismantled and be connected with two gas collecting bottle 19, and two quick-operation joint 228 respectively with the input fixed connection who corresponds gas collecting bottle 19, can collect gas by turns, can guarantee the efficiency of gas collection.

Wherein, every connecting pipe 8 outside all overlaps and is equipped with closing plate 6, and closing plate 6's inside and the bilateral symmetry that is located connecting pipe 8 are provided with two and insert 7, and closing plate 6 and fixedly connected with extension tube 5 are run through to the bottom of connecting pipe 8, not only can extend to the inside of gasification passageway, but also can seal it to prevent the gas leakage condition.

Wherein, the inside of collecting box 2 and the below that is located connecting pipe 8 can be dismantled and be connected with collection dirt drawer 3, can collect impurity to make things convenient for the staff to carry out unified processing.

Wherein, the air inlet 11 has been seted up to the inside of install bin 9 and the top that is located filter screen 4, one side of install bin 9 extends to the outside and the fixedly connected with baffle 12 of collecting box 2, the top fixedly connected with electric telescopic handle 13 of collecting box 2, one end of electric telescopic handle 13 and one side fixed connection of baffle 12, can shift out install bin 9 from the inside of collecting box 2 through electric telescopic handle 13 cooperation baffle 12, can take out the moisture absorption filter paper 10 of install bin 9 inside this moment and change.

Wherein, the outside of collecting box 2 and keep away from one side fixedly connected with electric cabinet 20 of connecting box 18, the outside fixedly connected with control panel 21 of electric cabinet 20, electric telescopic handle 13, first motor 141, air pump 15, second motor 221 and electron barometer 229 respectively with control panel 21 electric connection, can carry out centralized control to equipment to make things convenient for the staff to operate.

Example 2:

s1, moving the equipment to a gasification channel through a cart 1, respectively inserting extension pipes 5 at the bottoms of connecting pipes 8 into the gasification channel, sealing the gasification channel through a sealing plate 6, inserting ground pins 7 inside the sealing plate 6 into a coal seam to fix the coal seam, starting an air pump 15 through a control panel 21, pumping out gas inside a collecting box 2 by matching the air pump 15 with an air inlet pipe 16, forming negative pressure inside the collecting box 2, and pumping out the gas in the gasification channel by matching the connecting pipes 8 with the extension pipes 5 under the action of the negative pressure;

s2, the first motor 141 is started, at the moment, the first motor 141 drives the reciprocating screw rod 142 to rotate in the collecting box 2, at the moment, the reciprocating screw rod 142 drives the mounting plate 143 to reciprocate outside the mounting plate 143, the mounting plate 143 drives the gear 144 and the brush 146 to move in the moving process, the gear 144 rotates on the toothed plate 145 in the moving process, at the moment, the gear 144 can drive the brush 146 to rotate, gas entering the collecting box 2 is filtered through the filter screen 4, attached impurities inside the gas can be filtered through the filter screen 4, impurities outside the filter screen 4 can be cleaned through the rotating brush 146, the cleaned impurities downwards fall into the dust collection drawer 3 to be collected, the filtered gas enters the mounting box 9 through the air inlet 11, and moisture in the gas is adsorbed under the matching of the moisture absorption filter paper 10;

s3, under the matching of the air pump 15, the air inlet pipe 16 and the air outlet pipe 17, the dehumidified air inside the installation box 9 can be conveyed into the connection box 18, at this time, the air inside the connection box 18 enters the corresponding guide pipe 227 through the second air outlet 226 and is conveyed into the air collecting bottle 19 through the guide pipe 227 for collection, when the electronic air pressure gauge 229 on the guide pipe 227 reaches a set pressure, the second motor 221 drives the lead screw 222 to rotate inside the connection box 18, at this time, the lead screw 222 drives the second stop block 225 and the first stop block 223 to move, at this time, the second stop block 225 can seal the second air outlet 226, meanwhile, the first stop block 223 moves away from the top of the first air outlet 224, at this time, the air inside the connection box 18 can enter another air collecting bottle 19 through the first air outlet 224 and the corresponding guide pipe 227 for collection, and then, the air collecting bottle 19 is replaced through the quick connector 228;

s4, move out installing bin 9 from the inside of collecting box 2 through electric telescopic handle 13 cooperation baffle 12, can take out the inside moisture absorption filter paper 10 of installing bin 9 this moment, it can to change it afterwards, take out collection dirt drawer 3 from the inside of collecting box 2, can clear up it this moment.

In the description of the present invention, it is to be understood that the terms "coaxial", "bottom", "one end", "top", "middle", "other end", "upper", "one side", "top", "inner", "front", "center", "both ends", and the like are used in the orientations and positional relationships indicated in the drawings only for the convenience of description and simplicity of description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed in a particular orientation, and be operated, and therefore, are not to be construed as limiting the present invention.

Furthermore, the terms "first", "second", "third", "fourth" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or as implying any number of indicated technical features, whereby the features defined as "first", "second", "third", "fourth" may explicitly or implicitly include at least one such feature.

In the present invention, unless otherwise explicitly stated or limited, the terms "mounted," "disposed," "connected," "fixed," "screwed" and the like are to be understood broadly, for example, as being fixedly connected, detachably connected, or integrated; can be mechanically or electrically connected; the terms may be directly connected or indirectly connected through an intermediate, and may be communication between two elements or interaction relationship between two elements, unless otherwise specifically limited, and the specific meaning of the terms in the present invention will be understood by those skilled in the art according to specific situations.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims

1. The gasification and recovery device for the residual coal at the end slope of the open pit mine is characterized by comprising a trolley (1), a collection box (2), connecting pipes (8), moisture-absorbing filter paper (10), a cleaning component (14), an air pump (15), a connecting box (18) and a ventilation component (22), wherein the collection box (2) is fixedly connected to the top of the trolley (1), a filter screen (4) is fixedly connected to the inside of the collection box (2), a plurality of connecting pipes (8) are fixedly connected to the inside of the collection box (2) and below the filter screen (4), the cleaning component (14) is arranged inside the collection box (2) and between the filter screen (4) and the connecting pipes (8), the installation box (9) is slidably connected to the inside of the collection box (2) and above the filter screen (4), the moisture-absorbing filter paper (10) is arranged inside the installation box (9), the air pump (15) is fixedly connected to the outside of the collection box (2), an air inlet pipe (16) is fixedly connected to the input end of the air pump (16), one end, far away from the air pump (15), the air pump (17) is connected to the output end of the air pump (17), and the air pump (17) is connected to the collection box (17), one end, far away from the air pump (15), of the exhaust pipe (17) extends to the inside of the connecting box (18), and a ventilation assembly (22) is arranged inside the connecting box (18).

2. The strip mine end slope residual coal gasification recovery device according to claim 1, wherein the cleaning assembly (14) comprises a first motor (141), a reciprocating screw rod (142), a mounting plate (143), a gear (144), a toothed plate (145) and a hairbrush (146), the first motor (141) is fixedly connected to the outside of the collection box (2), the output end of the first motor (141) extends to the inside of the cart (1) and is fixedly connected with the reciprocating screw rod (142), one end of the reciprocating screw rod (142) is rotatably connected with one side of the inner wall of the collection box (2), the mounting plate (143) is threadedly connected to the outside of the reciprocating screw rod (142), the gear (144) is rotatably connected to one side of the mounting plate (143), the toothed plate (145) is fixedly connected between two sides of the inner wall of the collection box (2) and below the gear (144), the gear (144) is meshed with the toothed plate (145), the hairbrush (146) is fixedly connected to one side of the gear (144) far away from the mounting plate (143), and the hairbrush (146) is in contact with the bottom of the filter screen (4).

3. The strip mine end slope residual coal gasification and recovery device according to claim 1, the air exchange assembly (22) comprises a second motor (221), a lead screw (222), a first block (223), a first air outlet (224), a second block (225), a second air outlet (226), a conduit (227), a quick connector (228) and an electronic barometer (229), the outside of the connecting box (18) is fixedly connected with a second motor (221), the output end of the second motor (221) extends into the connecting box (18) and is fixedly connected with a screw rod (222), one end of the screw rod (222) is rotationally connected with one side of the inner wall of the connecting box (18), a first stop block (223) is connected to the outer part of the screw rod (222) in a threaded manner, a second stop block (225) is connected with the outer part of the screw rod (222) and is positioned at one side of the first stop block (223) in a threaded manner, a first air outlet (224) and a second air outlet (226) which are matched with the first stop block (223) and the second stop block (225) are arranged in the connecting box (18), the inside of the first air outlet (224) and the inside of the second air outlet (226) are both fixedly connected with conduits (227), the bottoms of the two conduits (227) are both fixedly connected with quick connectors (228), and the outside of the two conduits (227) are both fixedly connected with electronic barometers (229).

4. The strip mine end slope residual coal gasification and recovery device according to claim 1, wherein two gas collecting bottles (19) are detachably connected to the top of the cart (1), and two quick connectors (228) are respectively and fixedly connected with the input ends of the corresponding gas collecting bottles (19).

5. The strip mine end slope residual coal gasification and recovery device according to claim 1, wherein a sealing plate (6) is sleeved outside each connecting pipe (8), two ground plugs (7) are symmetrically arranged inside the sealing plate (6) and on two sides of each connecting pipe (8), and the bottom end of each connecting pipe (8) penetrates through the sealing plate (6) and is fixedly connected with an extension pipe (5).

6. The strip mine end slope residual coal gasification recovery device according to claim 1, wherein a dust collection drawer (3) is detachably connected inside the collection box (2) and below the connecting pipe (8).

7. The strip mine end slope residual coal gasification and recovery device according to claim 1, wherein an air inlet (11) is formed inside the installation box (9) and above the filter screen (4), one side of the installation box (9) extends to the outside of the collection box (2) and is fixedly connected with a baffle (12), an electric telescopic rod (13) is fixedly connected to the top of the collection box (2), and one end of the electric telescopic rod (13) is fixedly connected with one side of the baffle (12).

8. The gasification and recovery device for the residual coal at the end slope of the open pit mine according to claim 7, wherein an electric cabinet (20) is fixedly connected to the outside of the collection box (2) and the side far away from the connection box (18), a control panel (21) is fixedly connected to the outside of the electric cabinet (20), and the electric telescopic rod (13), the first motor (141), the air pump (15), the second motor (221) and the electronic barometer (229) are respectively and electrically connected with the control panel (21).

9. The use method of the open pit end slope residual coal gasification recovery device based on claims 1-8 is characterized by comprising the following steps:

s1, moving equipment to a gasification channel through a cart (1), respectively inserting extension pipes (5) at the bottoms of connecting pipes (8) into the gasification channel, sealing the gasification channel through a sealing plate (6), inserting ground inserts (7) inside the sealing plate (6) into a coal seam to fix the ground inserts, starting an air pump (15) through a control panel (21), extracting gas inside a collecting box (2) by matching the air pump (15) with an air inlet pipe (16), forming negative pressure inside the collecting box (2), and extracting the gas in the gasification channel by matching the connecting pipes (8) with the extension pipes (5) under the action of the negative pressure;

s2, the first motor (141) is started, at the moment, the first motor (141) drives the reciprocating screw rod (142) to rotate inside the collecting box (2), at the moment, the reciprocating screw rod (142) drives the mounting plate (143) to reciprocate outside the mounting plate, the mounting plate (143) drives the gear (144) and the hairbrush (146) to move in the moving process, the gear (144) rotates on the toothed plate (145) in the moving process, at the moment, the gear (144) can drive the hairbrush (146) to rotate, gas entering the collecting box (2) is filtered through the filter screen (4), attached impurities inside the collecting box can be filtered through the filter screen (4), the impurities outside the filter screen (4) can be cleaned through the rotating hairbrush (146), the cleaned impurities fall downwards into the dust collecting drawer (3) to be collected, the filtered gas enters the mounting box (9) through the gas inlet (11), and water in the gas is adsorbed under the cooperation of the moisture absorption body (10);

s3, under the matching of the air pump (15), the air inlet pipe (16) and the air outlet pipe (17), the dehumidified air in the installation box (9) can be conveyed into the connection box (18), at the moment, the air in the connection box (18) enters the corresponding guide pipe (227) through the second air outlet (226) and is conveyed to the air collecting bottle (19) through the guide pipe (227) to be collected, when the electronic pressure gauge (229) on the guide pipe (227) reaches a set pressure, the second motor (221) drives the lead screw (222) to rotate in the connection box (18), at the moment, the lead screw (222) drives the second stop block (225) and the first stop block (223) to move, at the moment, the second stop block (225) can seal the second air outlet (226), at the same time, the first stop block (223) moves away from the top of the first air outlet (224), at the moment, the air in the connection box (18) can enter another air collecting bottle (19) through the first air outlet (224) and the corresponding guide pipe (227), and the air collecting bottle (19) can be quickly replaced through the air collecting bottle (228);

s4, the mounting box (9) is moved out from the inside of the collecting box (2) through the electric telescopic rod (13) matched with the baffle (12), the moisture absorption filter paper (10) inside the mounting box (9) can be taken out at the moment, and then the mounting box is replaced, the dust collection drawer (3) is pulled out from the inside of the collecting box (2), and at the moment, the dust collection drawer can be cleaned.