Coal mine ventilation air methane purification device

Abstract

The invention belongs to the technical field of ventilation air methane purification, and particularly relates to a coal mine ventilation air methane purification device which comprises a tank body, a filter screen is fixed in the tank body, the top of the tank body is rotationally connected with a hollow pipe through a bearing, and the bottom end of the hollow pipe slidably penetrates through the filter screen and extends to the position below the filter screen. And four air blowing plates for cleaning impurities adhered to the lower surface of the filter screen are arranged above the filter screen. By arranging the tank body, the filter screen, the hollow pipe, the air blowing plate, the circular seat, the vibration assembly, the shell, the movable shell, the corrugated hose, a spring, a plugging cover, a movable rod, an exhaust pipe assembly and a transmission assembly, in the using process of the coal mine ventilation air methane purifying device, impurities in ventilation air methane to be purified can be filtered through cooperation of the tank body and the filter screen; when the filter screen needs to be cleaned, the arranged air blowing plate can blow air downwards from the upper surface of the filter screen, and at the moment, impurities adhering to the lower surface of the filter screen can be automatically cleaned.

Description

Technical Field

[0001] The present invention relates to the technical field of ventilation gas purification, and in particular to a coal mine ventilation gas purification device. Background Art

[0002] The so-called ventilation gas refers to the gas discharged through the mine ventilation system, also known as ventilation gas. my country's coal resources have complex geological conditions and the coal seams generally have low permeability. In the absence of long-term surface extraction in advance, only a small part of the gas is discharged through underground extraction during coal mining. Most of the gas is discharged directly. The direct discharge of ventilation gas not only aggravates the greenhouse effect, but also causes a waste of resources. For the treatment of ventilation gas, a purification device with vacuum pressure swing adsorption function is currently used to purify it for use. Since ventilation gas contains more impurities, it will be discharged in the purification device. A filtering device is set at the inlet end of the device to filter out its internal impurities. However, during the use of the current ventilation gas purification device, due to the large amount of internal impurities when the ventilation gas is extracted, when the filtering device at the inlet end of the purification device has been used for a period of time, its internal filter screen will adhere to a large amount of impurities. If it is not removed in time, the filtering effect of the ventilation gas will be reduced. However, when cleaning the filtering device at the inlet end of the purification device, it is generally cleaned manually, which is inefficient and cumbersome to operate. Therefore, we propose a coal mine ventilation gas purification device to solve the above problems. Summary of the Invention

[0003] (1) Technical problems solved

[0004] In view of the deficiencies in the prior art, the present invention provides a coal mine ventilation gas purification device, which solves the problems raised in the above background technology.

[0005] (2) Technical solution

[0006] In order to achieve the above-mentioned purpose, the present invention specifically adopts the following technical solutions:

[0007] The filter screen is fixed on the inside of the tank body, and a hollow tube is connected to the top of the tank body by a bearing. The bottom end of the hollow tube slides through the filter screen and extends below the filter screen, and four air blowing plates are arranged above the filter screen for cleaning impurities adhering to the lower surface of the filter screen. The air blowing plates are connected and fixed with the hollow tube. A circular seat is fixed to the inside of the tank body by two support rods, and the hollow tube and the circular seat are rotatably connected by bearings. A vibration component for assisting in cleaning impurities adhering to the lower surface of the filter screen is arranged inside the circular seat. The bottom of the circular seat is fixed with a shell by a mounting block, and the bottom end of the hollow tube is connected to the top of the shell. A movable shell is provided inside the shell, and a corrugated hose is connected and fixed to the top of the movable shell. The top of the corrugated hose is connected and fixed to the top inner wall of the shell, and four air blowing plates are fixed on the top of the movable shell for facilitating the movement of the shell The cam is secured to the top of the tank body with a spring which is fixed to the top of the outer cover and has a cam which is secured to the top of the tank body.

[0008] Furthermore, the vibration assembly includes two rotating shafts rotatably connected to the circular seat through bearings, the surfaces of the rotating shafts are fixed with driven bevel gears, the surface of the hollow tubes is fixed with driving bevel gears, the driven bevel gears are meshed with the driving bevel gears, one end of the rotating shafts is fixed with a rotating plate, one side wall of the rotating plate is movably connected with a T-shaped reciprocating rod through a T-shaped shaft, the surface of the circular seat is fixed with a guide ring adapted to the two T-shaped reciprocating rods, and the T-shaped reciprocating rods slide on the guide rings.

[0009] Furthermore, the exhaust pipe assembly includes a connecting seat fixed to the exhaust hole of the tank body, the interior of the connecting seat is connected to a pipe fitting through threads, and a circular filter is fixed to the bottom end of the pipe fitting.

[0010] Furthermore, the transmission assembly includes a transmission shaft rotatably connected to the top of the bracket through a bearing, a first gear is fixed to the surface of the transmission shaft, a second gear is fixed to the surface of the hollow tube, the second gear is meshed with the first gear, a motor is fixed to the top of the bracket, and the output end of the motor is fixedly connected to the top of the transmission shaft.

[0011] Furthermore, the drying component includes a guide tube fixed on the top of the support plate and an air-water separator body, one end of the guide tube is connected and fixed to the inlet end pipe of the air-water separator body, the outlet end pipe of the air-water separator body is connected and fixed to the air inlet end of the tank body, a heating box is fixed on the top of the guide tube, heating wires are equidistantly fixed inside the heating box, an air supply pipe is connected and fixed at the air inlet hole of the heating box, the other end of the air supply pipe is connected and fixed to the air outlet end of the air pump, a spiral hollow plate is fixed inside the guide tube, a cylindrical shell is fixed on the spiral hollow plate, one end of the air inlet pipe and the air outlet pipe of the spiral hollow plate both pass through the guide tube and extend to the outside thereof, and one end of the air inlet pipe is connected and fixed to the air outlet hole of the heating box.

[0012] Furthermore, a drainage shell is connected and fixed on the guide cylinder, and a second sealing cover is threadedly connected to the outlet pipe of the drainage shell.

[0013] Furthermore, spoiler ramps are fixed at equal intervals inside the heating box.

[0014] Furthermore, the top end of the hollow tube is connected and fixed with a first male joint, one end of the bent tube is connected and fixed with a first female joint, the first male joint is sealed and rotatably connected to the first female joint, the bottom end of the hollow tube is connected and fixed with a second male joint, the top of the shell is connected and fixed with a second female joint, the second male joint is sealed and rotatably connected to the second female joint.

[0015] Furthermore, a sealing ring is fixed on the movable shell, and the outer surface of the sealing ring is tightly fitted with the inner wall of the shell.

[0016] (3) Beneficial effects

[0017] Compared with the prior art, the present invention provides a coal mine ventilation gas purification device, which has the following beneficial effects:

[0018] The present invention provides a tank body, a filter screen, a hollow tube, an air blowing plate, a circular seat, a vibration component, a shell, a movable shell, a corrugated hose, a spring, a blocking cover, a movable rod, an exhaust pipe component and a transmission component. During the use of the coal mine exhaust gas purification device, the tank body and the filter screen can be used to filter impurities in the exhaust gas before purification by cooperating with each other. When the filter screen needs to be cleaned, the provided air blowing plate can be used to blow air downward from the upper surface of the filter screen, so that impurities adhering to its lower surface can be automatically cleaned. Subsequently, with the assistance of the vibration component, the effect of the air blowing plate on cleaning impurities adhering to the lower surface of the filter screen can be further enhanced. The operation is convenient, and the air blowing plate can synchronously drive the blocking cover to open when it is running. At this time, with the cooperation of the exhaust pipe component, the cleaned impurities can be automatically settled to the bottom of the tank body. After the cleaning is completed, the blocking cover will automatically reset and continue to block the impurity collection area inside the tank body, thereby preventing the transported exhaust gas from adsorbing the collected impurities on the filter screen again during filtration.

[0019] The present invention, by arranging an air pump, a bent pipe, a support plate and a drying component, allows the exhaust gas before extraction and filtration to be dehumidified by the drying component first, so as to facilitate the gas-water separation of the exhaust gas, thereby preventing impurities from adhering to the lower surface of the filter screen due to moisture in the exhaust gas and being difficult to clean, while also avoiding affecting the utilization efficiency and safety of the exhaust gas. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is a schematic diagram of the tank structure of the present invention;

[0021] Figure 2 This is a cross-sectional view of the tank structure of the present invention;

[0022] Figure 3 For the present invention Figure 3 A schematic diagram of the structure at center A;

[0023] Figure 4 This is a schematic diagram of the circular seat structure of the present invention;

[0024] Figure 5 This is a schematic diagram of the movable shell structure of the present invention;

[0025] Figure 6 For the present invention Figure 2 A magnified schematic diagram of the structure at point B in the middle;

[0026] Figure 7 This is a schematic diagram of the guide shell structure of the present invention;

[0027] Figure 8 This is a schematic diagram of the heating box structure of the present invention;

[0028] Figure 9This is a flow chart of the vacuum adsorption purification process of the purification device of the present invention.

[0029] Figure: 1, tank body; 2, filter screen; 3, hollow tube; 4, air blowing plate; 5, circular seat; 6, vibration assembly; 601, rotating shaft; 602, driven bevel gear; 603, driving bevel gear; 604, rotating plate; 605, T-type reciprocating rod; 606, guide ring; 7, housing; 8, moving shell; 9, corrugated hose; 10, spring; 11, blocking cover; 12, moving rod; 13, exhaust pipe assembly; 1301, connecting seat; 1302, pipe fitting; 1303, circular filter screen; 14, bracket; 15, transmission assembly; 1501, transmission shaft; 1502, first gear; 1503 , second gear; 1504, motor; 16, air pump; 17, elbow; 18, support plate; 19, drying assembly; 1901, guide tube; 1902, gas-water separator body; 1903, heating box; 1904, heating wire; 1905, air supply pipe; 1906, spiral hollow plate; 1907, cylindrical shell; 1908, air inlet pipe; 1909, air outlet pipe; 1910, drainage shell; 1911, spoiler inclined plate; 20, gas discharge pipe; 21, first male connector; 22, first female connector; 23, second male connector; 24, second female connector; 25, sealing ring. DETAILED DESCRIPTION

[0030] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0031] Example

[0032] like Figure 1 、 Figure 2 、 Figure 3 、 Figure 4 、 Figure 5 and Figure 9As shown, a coal mine ventilation gas purification device proposed in one embodiment of the present invention includes a tank body 1, a filter screen 2 is fixed inside the tank body 1, a hollow tube 3 is rotatably connected to the top of the tank body 1 through a bearing, the bottom end of the hollow tube 3 slides through the filter screen 2 and extends to the bottom thereof, four air blowing plates 4 are provided above the filter screen 2 for cleaning impurities adhering to the lower surface thereof, the air blowing plates 4 are connected and fixed with the hollow tube 3, a circular seat 5 is fixed inside the tank body 1 through two support rods, the hollow tube 3 and the circular seat 5 are rotatably connected through a bearing, and the inside of the circular seat 5 The bottom of the filter 2 is provided with a vibration component 6 for assisting in cleaning impurities adhered to the lower surface of the filter screen 2. The bottom of the circular seat 5 is fixed with a shell 7 through a mounting block. The bottom end of the hollow tube 3 is connected to the top of the shell 7. A movable shell 8 is provided inside the shell 7. A sealing ring 25 is fixed on the movable shell 8. The outer surface of the sealing ring 25 fits tightly with the inner wall of the shell 7, which can further enhance the tightness of the movable shell 8 and the shell 7 after being fitted together, and avoid the situation where the movable shell 8 cannot move up due to air leakage caused by poor fitting between the two. The top of the movable shell 8 is connected and fixed with a corrugated hose 9. The top of the corrugated hose 9 is connected and fixed to the top inner wall of the shell 7. Four springs 10 are fixed on the top of the mobile shell 8 to facilitate the automatic reset of the mobile shell 8. The tops of the springs 10 are fixedly connected to the top inner wall of the shell 7. A blocking cover 11 is provided inside the tank body 1. Four moving rods 12 are fixed on the top of the blocking cover 11. The other ends of the moving rods 12 slide through the shell 7 and extend into the interior thereof and are fixedly connected to the mobile shell 8. The outer surface of the tank body 1 is provided with four groups of exhaust pipe assemblies 13 for automatically settling impurities after cleaning the interior. A bracket 14 is fixed on the top, and a transmission assembly 15 for driving the hollow tube 3 to rotate is provided on the top of the bracket 14. An air pump 16 is fixed on the top of the bracket 14. The air outlet end of the air pump 16 is connected and fixed with a bend pipe 17. The other end of the bend pipe 17 passes through the bracket 14 and is connected to the top of the hollow tube 3. A support plate 18 is fixed on the surface of the tank body 1. A drying assembly 19 for dehumidifying the gas is provided on the top of the support plate 18. A first sealing cover is threadedly connected to the discharge pipe of the tank body 1. A gas discharge pipe 20 is fixed to the top of the tank body 1. Figure 9As shown, the purification device for exhaust gas also includes an adsorption tank tower, a vacuum pump and a process pipeline. A carbon-based molecular sieve adsorbent is installed in the adsorption tower. The upper part of the adsorption tower is filled with an adsorbent specifically for adsorbing exhaust gas, and the lower part is filled with an adsorbent for removing water and carbon dioxide. During purification, the exhaust gas will undergo low-pressure adsorption, pressure equalization and reduction, vacuum desorption, pressure equalization and increase, and product gas pressure increase in the adsorption tower. Finally, the exhaust gas purification work can be completed, and the exhaust gas concentration after one purification can be purified to more than 30%, and the exhaust gas concentration after the second purification can be increased to more than 90%. The carbon molecular sieve inside the adsorption tower is actually a kind of activated carbon, which is different from the general carbonaceous adsorbent. , its micropore diameter is evenly distributed in a narrow range, the size of the micropore diameter is equivalent to the diameter of the gas molecules to be separated, the specific surface area of ​​the micropores generally accounts for more than 90% of the total surface area of ​​the carbon molecular sieve, and the pore structure of the carbon molecular sieve is mainly distributed in the form of: the diameter of the macropores is connected to the outer surface of the carbon particles, the transition holes branch out from the macropores, and the micropores branch out from the transition holes. In the separation process, the macropores mainly act as transport channels, and the micropores act as molecular sieves. In the process of using this coal mine exhaust gas purification device, the gas discharge pipe 20 of the tank body 1 can be connected and fixed with the inlet end of the adsorption tower. At this time, the exhaust gas will first pass through the interior of the drying component 19, and the air pump 16 is used to blow air into the interior of the drying component 19. At this time, the exhaust gas can be purified. The dehumidification is carried out, and then the dehumidified exhaust gas will enter the interior of the tank body 1, and after being filtered by the filter screen 2, it will be sent to the interior of the adsorption tower through the gas discharge pipe 20. When the filter screen 2 is cleaned at a later time, the exhaust gas delivery end will be closed first, and then the air pump 16 will be started to blow the compressed gas blown out through the elbow 17 to the interior of the hollow tube 3, and then the gas will be blown out through the air blowing plate 4. At this time, the hollow tube 3 can be driven to rotate with the cooperation of the transmission component 15, and when the hollow tube 3 rotates, the four air blowing plates 4 will be driven to rotate. Since the air blowing plate 4 is located above the filter screen 2 and blows air downward, the impurities adhering to its lower surface can be blown off, and when the hollow tube 3 rotates, it will synchronously drive the vibration component 6 The filter 2 can be cleaned by the cooperation of the vibration component 6. At the same time, during the operation of the air blowing plate 4, part of the gas will flow down through the hollow tube 3 to the inside of the shell 7. At this time, the movable shell 8 can be lifted up inside the shell 7 under the action of the compressed gas. After the movable shell 8 moves up, the spring 10 will be in a compressed state, and the movable shell 8 will drive the movable rod 12 to move up when it moves up. Finally, the moving rod 12 will drive the blocking cover 11 to open when it moves up. Then the compressed gas that cleans the impurities adhering to the lower surface of the filter 2 will be discharged through the exhaust pipe assembly 13. At this time, the cleaned impurities can be automatically settled to the bottom of the tank body 1. Later, the first sealing cover on the impurity discharge pipe at the bottom of the tank body 1 can be opened to clean the collected impurities.Finally, when the filter 2 is cleaned, the air pump 16 will no longer blow air into the hollow tube 3. Then, under the restoring force of the compressed spring 10, the movable shell 8 can be driven to reset inside the shell 7. The reset of the movable shell 8 can drive the blocking cover 11 to reset through the movable rod 12, so as to continue to block the inlet of the impurity collection area inside the tank body 1, and prevent the exhaust gas from blowing up the cleaned and collected impurities and adsorbing them onto the filter 2 again during subsequent transportation and filtration. By installing a solenoid valve on the elbow 17, when the filter 2 does not need to be cleaned, the elbow 17 is in a closed state. At this time, the air pump 16 will send compressed gas to the interior of the drying component 19 to dry the exhaust gas. Conversely, when cleaning the filter 2, the solenoid valve on the elbow 17 is opened, and the compressed gas delivered to the drying component 19 will be closed, so that the compressed air delivery work of the two will not be carried out synchronously.

[0033] like Figure 3 As shown, in some embodiments, the vibration component 6 includes two rotating shafts 601 rotatably connected to the circular seat 5 through bearings, the surfaces of the rotating shafts 601 are fixed with driven bevel gears 602, the surface of the hollow tube 3 is fixed with a driving bevel gear 603, the driven bevel gears 603 are meshed with the driving bevel gear 602, one end of the rotating shaft 601 is fixed with a rotating plate 604, and one side wall of the rotating plate 604 is movably connected with a T-shaped reciprocating rod 605 through a T-shaped shaft, and the surface of the circular seat 5 is fixed with a driven bevel gear 602. The guide ring 606 matched with 605 and the T-shaped reciprocating rod 605 both slide on the guide ring 606. When in use, when the hollow tube 3 rotates, it will drive the active bevel gear 603 to rotate. At this time, with the cooperation of the two driven bevel gears 602, when the hollow tube 3 rotates, the two rotating shafts 601 can be synchronously driven to rotate. After the rotating shaft 601 rotates, it can move back and forth up and down with the cooperation of the T-shaped shaft and the guide ring 606. Finally, when the T-shaped reciprocating rod 605 moves up and down, it can assist in vibration cleaning of impurities adhered to the bottom of the filter screen 2.

[0034] like Figure 6 As shown, in some embodiments, the exhaust pipe assembly 13 includes a connecting seat 1301 fixed to the exhaust hole of the tank body 1, and the interior of the connecting seat 1301 is connected to a pipe fitting 1302 through a thread, and a round filter screen 1303 is fixed to the bottom end of the pipe fitting 1302. When in use, the gas that cleans the impurities adhering to the lower surface of the filter screen 2 will be discharged through the pipe fitting 1302, and the set round filter screen 1303 can prevent the collected impurities from being discharged into the interior of the tank body 1, and the pipe fitting 1302 and the connecting seat 1301 are connected and fixed by threads, which will make it more convenient to remove the pipe fitting 1302 and clean the round filter screen 1303 later.

[0035] like Figure 2As shown, in some embodiments, the transmission assembly 15 includes a transmission shaft 1501 rotatably connected to the top of the bracket 14 through a bearing, a first gear 1502 is fixed to the surface of the transmission shaft 1501, and a second gear 1503 is fixed to the surface of the hollow tube 3, the second gear 1503 is meshed with the first gear 1502, and a motor 1504 is fixed to the top of the bracket 14, and the output end of the motor 1504 is fixedly connected to the top of the transmission shaft 1501. When in use, the transmission shaft 1501 is driven to rotate by starting the motor 1504. When the transmission shaft 1501 rotates, it will drive the first gear 1502 to rotate, and when the first gear 1502 rotates, it will drive the second gear 1503 meshed with it to rotate. Because the second gear 1503 is fixed to the surface of the hollow tube 3, the hollow tube 3 can be driven to rotate at the same time as the transmission shaft 1501 rotates.

[0036] like Figure 1 、 Figure 7 and Figure 8As shown, in some embodiments, the drying component 19 includes a guide tube 1901 and an air-water separator body 1902 fixed on the top of the support plate 18, and a drainage shell 1910 is connected and fixed on the guide tube 1901, and a second sealing cover is threadedly connected to the outlet pipe of the drainage shell 1910. During the later use of the guide tube 1901, due to the setting of the spiral hollow plate 1906, some impurities in the exhaust gas will inevitably remain in the guide tube 1901, and the setting of the drainage shell 1910 makes it convenient to clean the impurities retained in the guide tube 1901. One end of the guide tube 1901 is connected and fixed to the inlet pipe of the air-water separator body 1902, and the air-water separator body 1902 is connected to the air-water separator body 1902. The outlet pipe of the separator body 1902 is connected and fixed to the air inlet end of the tank body 1, a heating box 1903 is fixed on the top of the guide tube 1901, and spoiler inclined plates 1911 are fixed at equal intervals inside the heating box 1903. The spoiler inclined plates 1911 can extend the time for the compressed air to flow inside the heating box 1903, so that the compressed air can be heated more thoroughly. Heating wires 1904 are fixed at equal intervals inside the heating box 1903, and an air supply pipe 1905 is connected and fixed to the air inlet of the heating box 1903. The other end of the air supply pipe 1905 is connected and fixed to the air outlet end of the air pump 16. A spiral hollow plate 1906 is fixed inside the guide tube 1901, and the spiral hollow plate 190 6 is fixed with a cylindrical shell 1907, one end of the air inlet pipe 1908 and the air outlet pipe 1909 of the spiral hollow plate 1906 both pass through the guide tube 1901 and extend to the outside thereof, one end of the air inlet pipe 1908 is connected and fixed with the air outlet of the heating box 1903. When in use, since one end of the air supply pipe 1905 is connected and fixed with the air outlet end of the air pump 16, the compressed air can be delivered to the interior of the heating box 1903 after the air supply pipe 1905 on the heating box 1903 is opened, and a solenoid valve is installed on the air supply pipe 1905 to control the air supply state of the air supply pipe 1905, and the compressed air delivered to the interior of the heating box 1903 is heated by the heating wire 1904. After being heated, it will be transported to the inside of the air intake pipe 1908, and then transported to the inside of the spiral hollow plate 1906 through the air intake pipe 1908. At this time, the spiral hollow plate 1906 can be heated, and the hot compressed air after use will be discharged through the air outlet pipe 1909. Therefore, when the moist exhaust gas enters the inside of the guide tube 1901 and flows, a dehumidification operation can be performed. Then the dehumidified exhaust gas can enter the inside of the gas-water separator body 1902 for treatment. Finally, the dried exhaust gas will be sent to the inside of the tank body 1, and an electromagnetic valve is installed on the fixed pipe connected to one end of the guide tube 1901 to control the state of the exhaust gas transporting pipe.

[0037] like Figure 2 and Figure 3As shown, in some embodiments, the top end of the hollow tube 3 is connected and fixed with a first male connector 21, one end of the elbow 17 is connected and fixed with a first female connector 22, the first male connector 21 and the first female connector 22 are sealed and rotatably connected, the bottom end of the hollow tube 3 is connected and fixed with a second male connector 23, the top of the shell 7 is connected and fixed with a second female connector 24, the second male connector 23 and the second female connector 24 are sealed and rotatably connected, and the male and female connectors used are rotatable connecting connectors. Since it is the existing technology, the connection structure of the male and female connectors is not shown in the figure, so that when the hollow tube 3 is rotated, it will not be separated or interfered with the elbow 17 and the shell 7, thereby ensuring that the compressed gas is normally delivered to the interior of the hollow tube 3.

[0038] Finally, it should be noted that the above descriptions are merely preferred embodiments of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art will be able to modify the technical solutions described in the aforementioned embodiments or substitute equivalents for some of the technical features. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the present invention.

Claims

1. A coal mine ventilation gas purification device, comprising a tank body (1), characterized in that: A filter screen (2) is fixed inside the tank body (1), and a hollow tube (3) is rotatably connected to the top of the tank body (1) via a bearing. The bottom end of the hollow tube (3) slides through the filter screen (2) and extends below the filter screen. Four air blowing plates (4) are provided above the filter screen (2) for cleaning impurities adhering to the lower surface of the filter screen. The air blowing plates (4) are all connected and fixed to the hollow tube (3). A circular seat (5) is fixed inside the tank body (1) via two support rods. The hollow tube (3) is rotatably connected to the circular seat (5) via a bearing. The inside of the circular seat (5) A vibration assembly (6) is provided for assisting in cleaning impurities adhering to the lower surface of the filter screen (2); a shell (7) is fixed to the bottom of the circular seat (5) via a mounting block; the bottom end of the hollow tube (3) is communicated with the top of the shell (7); a movable shell (8) is provided inside the shell (7); a corrugated hose (9) is communicated and fixed to the top of the movable shell (8); the top end of the corrugated hose (9) is communicated and fixed to the top inner wall of the shell (7); four springs (10) are fixed to the top of the movable shell (8) for facilitating automatic reset of the movable shell (8); the springs (10) are The top ends are fixedly connected to the top inner wall of the shell (7), a blocking cover (11) is provided inside the tank body (1), four moving rods (12) are fixed on the top of the blocking cover (11), the other ends of the moving rods (12) are slid through the shell (7) to extend into the interior thereof and are fixedly connected to the moving shell (8), the outer surface of the tank body (1) is provided with four groups of exhaust pipe assemblies (13) for automatically settling impurities after cleaning the interior thereof, a bracket (14) is fixed on the top of the tank body (1), and a bracket (14) is provided on the top of the bracket (14) for driving the hollow tube (3) into the tank body (1). A transmission assembly (15) is provided for rotating, an air pump (16) is fixed on the top of the bracket (14), a bend pipe (17) is connected and fixed to the air outlet end of the air pump (16), the other end of the bend pipe (17) passes through the bracket (14) and is connected to the top of the hollow tube (3), a support plate (18) is fixed on the surface of the tank body (1), a drying assembly (19) for dehumidifying the gas is provided on the top of the support plate (18), a first sealing cover is threadedly connected to the exhaust pipe of the tank body (1), and a gas discharge pipe (20) is connected and fixed to the top of the tank body (1).

2. The coal mine ventilation gas purification device according to claim 1, characterized in that: The vibration assembly (6) comprises two rotating shafts (601) rotatably connected to the circular seat (5) via bearings, a driven bevel gear (602) being fixed on the surface of each rotating shaft (601), a driving bevel gear (603) being fixed on the surface of the hollow tube (3), and each driven bevel gear (603) being meshed with the driving bevel gear (602), a rotating plate (604) being fixed on one end of each rotating shaft (601), a T-shaped reciprocating rod (605) being movably connected to a side wall of each rotating plate (604) via a T-shaped shaft, and a guide ring (606) being fixed on the surface of the circular seat (5), and each T-shaped reciprocating rod (605) being slidable on the guide ring (606).

3. The coal mine ventilation gas purification device according to claim 1, characterized in that: The exhaust pipe assembly (13) comprises a connecting seat (1301) fixed to the exhaust hole of the tank body (1); a pipe (1302) is connected to the interior of the connecting seat (1301) via a thread; and a round filter (1303) is fixed to the bottom end of the pipe (1302).

4. The coal mine ventilation gas purification device according to claim 1, characterized in that: The transmission assembly (15) includes a transmission shaft (1501) rotatably connected to the top of the bracket (14) through a bearing, a first gear (1502) is fixed on the surface of the transmission shaft (1501), a second gear (1503) is fixed on the surface of the hollow tube (3), the second gear (1503) is meshed with the first gear (1502), a motor (1504) is fixed on the top of the bracket (14), and the output end of the motor (1504) is fixedly connected to the top of the transmission shaft (1501).

5. The coal mine ventilation gas purification device according to claim 1, characterized in that: The drying assembly (19) comprises a guide tube (1901) fixed on the top of the support plate (18) and a gas-water separator body (1902), one end of the guide tube (1901) is connected and fixed to the inlet pipe of the gas-water separator body (1902), the outlet pipe of the gas-water separator body (1902) is connected and fixed to the air inlet end of the tank body (1), a heating box (1903) is fixed on the top of the guide tube (1901), heating wires (1904) are fixed at equal intervals inside the heating box (1903), and the air inlet of the heating box (1903) is fixed to the heating wires (1904). An air supply pipe (1905) is connected and fixed at the hole, and the other end of the air supply pipe (1905) is connected and fixed to the air outlet end of the air pump (16). A spiral hollow plate (1906) is fixed inside the guide tube (1901), and a cylindrical shell (1907) is fixed on the spiral hollow plate (1906). One end of the air inlet pipe (1908) and the air outlet pipe (1909) of the spiral hollow plate (1906) both pass through the guide tube (1901) and extend to the outside thereof, and one end of the air inlet pipe (1908) is connected and fixed to the air outlet hole of the heating box (1903).

6. The coal mine ventilation gas purification device according to claim 5, characterized in that: The guide tube (1901) is connected to and fixed with a drainage shell (1910), and a second sealing cover is threadedly connected to the outlet pipe of the drainage shell (1910).

7. The coal mine ventilation gas purification device according to claim 5, characterized in that: The interior of the heating box (1903) is fixed with spoiler inclined plates (1911) at equal intervals.

8. The coal mine ventilation gas purification device according to claim 1, characterized in that: The top end of the hollow tube (3) is connected to and fixed with a first male connector (21), one end of the bent tube (17) is connected to and fixed with a first female connector (22), the first male connector (21) and the first female connector (22) are connected in a sealed and rotatable manner, the bottom end of the hollow tube (3) is connected to and fixed with a second male connector (23), the top of the housing (7) is connected to and fixed with a second female connector (24), the second male connector (23) and the second female connector (24) are connected in a sealed and rotatable manner.

9. The coal mine ventilation gas purification device according to claim 1, characterized in that: A sealing ring (25) is fixed on the movable shell (8), and the outer surface of the sealing ring (25) is tightly fitted with the inner wall of the shell (7).

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