Coal Mine Gas and Dust Explosion-Proof Air Purification and Cooling Equipment

Abstract

An explosion-proof air purification and cooling device for coal mine gas and dust includes a volute-shaped impeller driving device. The air inlet of the impeller driving device is connected to an induced draft fan. The impeller driving device includes a volute housing and an impeller located within the volute housing. Airflow enters the volute housing tangentially to the impeller and, upon impact with the impeller blades, drives the impeller to rotate rapidly. A water spray system is also installed inside and outside the volute housing, facing the impeller. The water and airflow are forcibly agitated by the high-speed rotating impeller within the volute housing, and then discharged through an outlet on the side of the volute housing. This invention can forcibly agitate and clean the gas containing coal mine gas and dust drawn in from the mine, allowing the airflow to fully contact the continuously exploding water mist, separating gas, dust, and other harmful gases from the airflow, ultimately discharging clean air, thus maintaining fresh air in the mine for a long time.

Description

Technical Field

[0001] This invention relates to an environmental protection device for exhaust gas treatment, specifically an air purification and cooling device that can prevent coal mine gas dust from exploding. Background Technology

[0002] Coal mine gas is a general term for toxic and harmful gases, primarily methane, found underground in coal mines. During coal mining, the coal seam is damaged, and the gas originally adsorbed in the coal and surrounding rock is desorbed and released into the mine air. Mined coal also releases gas. When the concentration of gas in the air reaches a certain range (generally 5%-16%), it will explode upon contact with an ignition source, generating high temperature, high pressure, and a powerful shock wave, causing serious casualties and property damage. Furthermore, high concentrations of gas reduce the oxygen content in the air, leading to oxygen deprivation and suffocation. Currently, coal mine gas is difficult to separate and purify; the only method is to use ventilation systems to introduce fresh air into the mine, diluting the gas concentration below the explosive limit and then venting the gas out of the mine. This method also damages the surrounding environment.

[0003] The Chinese Patent Office published a patent on November 19, 2024, with patent number 202420617340.8, which describes an energy-saving purification device for coal mine gas ventilation, belonging to the field of gas purification technology. It includes a housing with an exhaust fan fixedly mounted at one end. This invention uses the exhaust fan to provide suction, drawing harmful gases towards the intake pipe, where they are purified and ventilated by the purification components. When the activated carbon filter plate in the purification components needs replacement, the pull ring is pulled downwards, causing the locking block to move towards the circular groove, separating it from the fixing pin. The activated carbon filter plate is then pulled outwards along the T-slot, and the T-shaped block at the bottom of the new activated carbon filter plate is inserted into the T-slot and moved towards the square groove. When the locking block is pressed into the circular groove by the fixing pin, and the fixing pin is fully inserted into the square groove, the locking block loses its pressure. A spring then pushes the locking block towards the fixing pin until the locking block engages with the fixing pin, improving the ease of disassembling and assembling the activated carbon filter plate. This structure only absorbs harmful gases through activated carbon, and the contact area between the airflow and the activated carbon is very small, so the absorption effect of harmful gases is very limited. Summary of the Invention

[0004] The purpose of this invention is to address the deficiencies and shortcomings of the prior art by providing an air purification and cooling device that can prevent coal mine gas and dust explosions.

[0005] To achieve the above objectives, the technical solution adopted by this invention is as follows: The coal mine gas and dust explosion-proof air purification and cooling equipment includes a volute-shaped impeller driving device. The air inlet of the impeller driving device is connected to an induced draft fan. The impeller driving device includes a volute housing and an impeller located within the volute housing. Airflow enters the volute housing tangentially along the impeller blades and, upon impact, drives the impeller to rotate rapidly. A water spray system facing the impeller is also provided inside and outside the volute housing. The water and airflow are forcibly agitated by the high-speed rotating impeller within the volute housing and then discharged through an outlet on the side of the volute housing. The outlet of the volute housing is connected to a water mist separation box via a ventilation duct. A chimney is provided above the water mist separation box, and the airflow passing through the water mist separation box is discharged from the chimney. A circulating water tank is provided below the water mist separation box, and the water flow at the bottom of the water mist separation box circulates in the circulating water tank, which supplies water to the water spray system.

[0006] The air inlet of the volute-shaped housing is large at the front end and small at the rear end, forming a compression air inlet. A spiral compression channel is also provided at the rear end of the compression air inlet, and the spiral compression channel decreases in size.

[0007] The water spraying system includes an inlet water spray pipe located outside the air inlet, and a circulating water tank supplying water to the inlet water spray pipe through a main water inlet pipe; multiple inlet water spray heads extending into the air inlet are installed on the inlet water spray pipe, and the airflow at the air inlet drives the water sprayed from the inlet water spray heads to impact the blades of the wind turbine.

[0008] The water spray system includes a side spray ring disposed on the side of the volute housing, and a circulating water tank supplies water to the inlet spray pipe through a main water inlet pipe; multiple side spray heads facing the impeller are disposed on the side spray ring.

[0009] The wind turbine includes a rotating shaft and multiple parallel annular blade fixing plates. Blades perpendicular to the blade fixing plates are fixedly installed on the blade fixing plates, and the blade cross-section is shaped like the number 7. A connecting ring is provided on the outer wall of the rotating shaft, and a wind guide connecting plate is provided between the connecting ring and the blade fixing plates, so that the wind turbine and the rotating shaft are linked together as a whole.

[0010] The water spraying system includes a hollow rotating shaft that is connected to an axial water inlet pipe via a mechanical seal. A circulating water tank supplies water to the rotating shaft through the axial water inlet pipe. Multiple water spray holes are provided on the side wall of the rotating shaft and are located inside the impeller. The water sprayed from the water spray holes is thrown towards the blades and continuously dispersed into water mist after impact.

[0011] The end of the wind turbine is provided with a friction mesh, which is fixed to the outermost annular blade fixing plate of the wind turbine and rotates synchronously with the wind turbine.

[0012] The ventilation duct is equipped with a forced stirring and cleaning mesh, which is located behind the side spray ring and is fixedly mounted on the rotating shaft, rotating synchronously with the rotating shaft.

[0013] The forced stirring and cleaning mesh includes a bushing fitted on a rotating shaft. Two fixing plates are welded to the outer wall of the bushing. A circular mesh is welded on each fixing plate. The circular mesh is a mesh plate with multiple grids. Semi-frame reinforcing ribs are provided on the two circular meshes. The upper and lower ends of the semi-frame reinforcing ribs are bent to one side to form a welding surface, which is welded to the circular mesh.

[0014] A water replenishment tank is also provided above the circulating water tank. The top of the water replenishment tank is provided with a water inlet, and the bottom of the water replenishment tank is provided with a water inlet that communicates with the circulating water tank. A float valve cover is installed at the water inlet.

[0015] This invention can forcibly agitate and clean the gas containing coal mine gas and dust drawn in from the mine, allowing the airflow to fully contact the continuously exploding water mist, separating the gas, dust and other harmful gases from the airflow, and finally expelling pure air, so that the air in the mine can be kept fresh for a long time. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of the present invention.

[0017] Figure 2 This is a schematic diagram of the wind turbine propulsion device of the present invention.

[0018] Figure 3 This is a top view of the wind turbine of the present invention.

[0019] Figure 4 This is a cross-sectional schematic diagram of the wind turbine of the present invention.

[0020] Figure 5 This is a schematic diagram of the ventilation duct structure of the present invention.

[0021] Figure 6 This is a schematic diagram of the structure of the forced stirring cleaning mesh of the present invention.

[0022] Figure 7 For the present invention Figure 6 A side view diagram.

[0023] Figure 8 This is a schematic diagram of the water mist separation box of the present invention. Detailed Implementation

[0024] like Figure 1 , Figure 2As shown, this invention is a coal mine gas and dust explosion-proof air purification and cooling device that can ensure continuous air exchange in the mine. When a gas fracture layer is generated, the gas can be quickly sucked out, and the gas in the airflow is separated and purified, so that the coal mine gas explosion phenomenon will be eliminated forever. The dust in the mine will also be sucked up cleanly, so that the air in the mine can be kept fresh for a long time.

[0025] The coal mine gas and dust explosion-proof air purification and cooling equipment includes a volute-shaped impeller drive device 100. The shell flange 107 of the air inlet 102 of the impeller drive device 100 is connected to the induced draft fan. The air intake pipe of the induced draft fan extends into the mine. When the induced draft fan is working, the turbid gas mixed with gas and dust in the mine is sucked in and transported to the impeller drive device 100.

[0026] The wind turbine driving device 100 includes a volute housing 101 and a wind turbine 500 located inside the volute housing 101. The air inlet 102 of the volute housing 101 is larger at the front end and smaller at the rear end, forming a compression air inlet 103. The airflow is compressed at the compression air inlet 103 and enters the volute housing 101 along the tangential direction of the wind turbine 500. After colliding with the blades 501 of the wind turbine 500, it can drive the wind turbine 500 to rotate rapidly. A spiral compression channel 104 is also provided at the rear end of the compression air inlet 103. The spiral compression channel 104 gradually decreases in size, which increases the pressure of the airflow during movement, ensuring that each blade 501 of the wind turbine 500 is pushed evenly and continuously, thereby accelerating the rotational speed of the wind turbine 500.

[0027] The invention also includes a circulating water tank 306, with a drain pipe 307 at the bottom. A water pump 312 is installed at the end of the drain pipe 307 to draw out the gas, and a circulating water outlet pipe 313 is installed at the output end of the water pump 312. A trace amount of gas elimination liquid is added to the water in the circulating water tank 306, allowing the gas to quickly dissolve and decompose in the water, thus facilitating the complete elimination of the gas. An inlet spray pipe 403 is installed outside the air inlet 102, with multiple inlet spray heads 404 extending into the air inlet 102. The airflow at the air inlet 102 can drive the water sprayed from the inlet spray heads 404 to impact the impeller 500, completing the first forced friction stirring during the impact process. The inlet spray pipe 403 is connected to the circulating water outlet 313 through the main water inlet pipe 405, thus the circulating water outlet 313 can supply water to the inlet spray pipe 403.

[0028] The volute housing 101 of the wind turbine drive device 100 has openings at both ends. A closed cavity 106 is provided at one end of the opening. A sealing plate 105 is provided on the outside of the closed cavity 106 to seal the outer end of the closed cavity 106, so that airflow cannot be discharged from the closed cavity 106. The sealing plate 105 is bolted to the closed cavity 106 for easy disassembly and maintenance. The other end of the volute housing 101 is an air outlet, and the ventilation duct 200 is connected to the air outlet of the volute housing 101 of the wind turbine drive device 100 through a pipe flange 204.

[0029] like Figure 3 , Figure 4 As shown, a rotating shaft 402 is mounted at the center of the impeller 500, and the impeller 500 and the rotating shaft 402 can rotate synchronously. A cross-shaped connecting frame 406 is installed inside the enclosed cavity 106, and the outer wall of the mechanical seal 401 is engaged with a cross-shaped bearing seat 407. The cross-shaped bearing seat 407 and the cross-shaped connecting frame 406 are connected by bolts 410. A cross-shaped connecting frame 406 is also provided inside the ventilation duct 200, and a cross-shaped bearing seat 407 is mounted on the rotating shaft 402. The cross-shaped bearing seat 407 and the cross-shaped connecting frame 406 are connected by bolts 410.

[0030] The wind turbine 500 includes multiple parallel annular blade fixing plates 502 and blades 501 fixed on the blade fixing plates 502. A connecting ring 506 is provided on the outer wall of the rotating shaft 402, and a guide connecting piece 505 is provided between the connecting ring 506 and the blade fixing plates 502, enabling the wind turbine 500 and the rotating shaft 402 to move together as a single unit. Each blade 501 has a 7-shaped cross-section; the airflow impacting the blades 501 will drive the wind turbine 500 to rotate. An inner reinforcing ring 503 is provided on the inner side of the wind turbine 500, connected to the inner end of each blade 501. An outer reinforcing ring 504 is provided on the outer side of the wind turbine 500, connected to the outer end of each blade 501, thereby strengthening the blades 501. The spiral compression channel 104 gradually narrows, increasing the pressure of the airflow during its movement. This ensures a uniform and continuous push on each blade 501 of the impeller 500, thereby accelerating the rotational speed of the impeller 500. An airflow guide plate 507 is also provided on the air guide connecting plate 505. The airflow guide plate 507 can drive the airflow to rotate spirally, allowing the airflow to fully rub against the blades 501.

[0031] The rotating shaft 402 is hollow inside, and an axial water inlet pipe 400 is inserted through the center of the sealing plate 105. The axial water inlet pipe 400 is connected to the rotating shaft 402 through a mechanical seal 401. The axial water inlet pipe 400 is also connected to the circulation outlet 313, which supplies water to the axial water inlet pipe 400 and into the inner hole of the rotating shaft 402. The rotating shaft 402 has multiple spray holes 411 on its side wall, which are located inside the impeller 500. The water sprayed from the spray holes 411 is thrown and continuously dispersed after impacting the blades 501. The airflow and water flow undergo a second forced friction and agitation inside the impeller. Gas and dust in the turbid gas can be quickly dissolved in the water and separated. A coupling 412 is provided at the end of the rotating shaft 402. The coupling 412 seals the end of the rotating shaft 402 and connects the hollow rotating shaft 402 to the rear shaft body. If the coupling 412 and the rear shaft are not installed, a plug can also be installed at the end of the rotating shaft 402 to seal the end of the rotating shaft 402.

[0032] A friction mesh 508 is provided at the end of the impeller 500. This friction mesh 508 is fixed to the outermost annular blade fixing plate 502 of the impeller 500 and rotates synchronously with the impeller 500. When airflow and water flow are discharged backward through the impeller, they collide with the high-speed rotating friction mesh 508, resulting in further friction and agitation. A side spray ring 408 is provided on the side of the volute housing. This side spray ring 408 can be installed inside the enclosed cavity 106 and ventilation duct 200. Multiple side spray heads 409 facing the impeller 500 are provided on the side spray ring 408. The side spray heads 409 replenish water inside the impeller 500. In particular, the side spray ring 409 continuously generates a water film on the friction mesh 508. The airflow must collide with this water film before being discharged backward, thus forming a third forced friction and agitation. Furthermore, the side spray ring 409 is opposite to the airflow direction, so the water flow explodes into a water mist after colliding with the airflow, covering the entire ventilation duct 200. The side spray ring 408 is also connected to the circulation outlet 313, which supplies water to the axial side spray ring 408. like Figure 6 As shown, a forced agitation and cleaning screen 600 is also provided on the rotating shaft 402. The forced agitation and cleaning screen 600 is located behind the side spray ring 408. The high-speed rotating shaft 402 can drive the forced agitation and cleaning screen 600 to rotate rapidly. The water jet sprayed from the side spray ring 409, after being blown apart by the airflow, collides with the high-speed rotating forced agitation and cleaning screen 600, thereby dispersing the water jet into water mist. The forced agitation and cleaning screen 600 includes a bushing 601 fitted on the rotating shaft 402. A key 606 is installed between the bushing 601 and the rotating shaft 402, so that the bushing 601 and the rotating shaft 402 rotate synchronously.

[0033] Two fixing plates 602 are welded to the outer wall of the bushing 601, with a certain spacing between them. A circular mesh 603 is welded onto each fixing plate 602. The circular mesh 603 is a mesh plate with multiple grids. Semi-frame reinforcing ribs 604 are provided on the two circular mesh plates 603 to increase the strength of the forced stirring and cleaning mesh plate 600. The upper and lower ends of the semi-frame reinforcing ribs 604 are bent to one side to form a welding surface, which facilitates welding with the circular mesh plates 603. The radial reinforcing ribs 604 are made of mesh plates with multiple grids, so they can also participate in the frictional stirring of water mist and airflow. The number of radial reinforcing ribs 607 at the outer edge of the circular mesh plate 603 is increased to reduce the gap between the radial reinforcing ribs 607. Diagonal reinforcing ribs 608 can even be provided on the radial reinforcing ribs 607, making the reinforcing ribs like tree branches, so that the circular mesh plate 603 does not have obvious excessive gaps.

[0034] like Figure 5 , Figure 6 , Figure 7 As shown, the ventilation duct 200 is stepped, with the inner diameter of the rear duct being larger than that of the front duct. A forced-stirring cleaning mesh 600 is installed between the two ducts, forming an air-blocking groove 201 between them. An outward-curving vent 202 is provided at the rear end of the front duct, thus reducing the rear opening of the air-blocking groove 201. A water-blocking ring 605 is provided along the outer edge of the forced-stirring cleaning mesh 600. The rear end of the water-blocking ring 605 bends outward to form a welding surface, which is welded to the edge of the upper circular mesh 603. The front end of the water-blocking ring 605 extends towards the air-blocking groove 201 to form an air-blocking and water-blocking wall. The vent 202 and the air-blocking and water-blocking wall prevent airflow from escaping from the outside of the forced-stirring cleaning mesh 600, avoiding the direct rearward discharge of some airflow without passing through the forced-stirring cleaning mesh 600.

[0035] A baffle ring 203 is also provided on the rear side of the forced stirring cleaning mesh 600. This baffle ring 203 is directly fixed to the inner wall of the ventilation duct 200 by screws, blocking the gap between the forced stirring cleaning mesh 600 and the ventilation duct 200, further preventing airflow from escaping from the outside of the forced stirring cleaning mesh 600. The airflow and water flow undergo a fourth forced friction stirring at the forced stirring cleaning mesh 600, further effectively removing gas and dust from the airflow.

[0036] Two forced stirring cleaning mesh 600s can be installed. A side spray ring 408 connected to the main water inlet pipe 405 is also installed on the front side of the rear forced stirring cleaning mesh 600. The side spray head on the side spray ring 408 is opposite to the airflow direction. After the water flow collides with the airflow, it bursts into water mist and covers the entire rear forced stirring cleaning mesh 600.

[0037] like Figure 8 As shown, the rear end of the ventilation duct 200 is a water mist separation box 300, and the ventilation duct 200 is connected to the side of the water mist separation box 300 via a rear flange 205. Airflow and water mist enter the water mist separation box 300 through the ventilation duct 200. The water mist separation box 300 includes a friction column mounting cavity 314 on the front side and an upper row of defogging chambers 315 on the rear side. The friction column mounting cavity 314 and the upper row of defogging chambers 315 are connected by a defogging chamber flange 316. Multiple rows of defogging friction columns 301 are arranged in the friction column mounting cavity 314, and the multiple rows of defogging friction columns 301 are staggered to allow the airflow to impact them as much as possible. The front end of the defogging friction column 301 is sharp and the rear end is smooth. After the water mist rubs against the side wall of the defogging friction column 301, it can condense at the leeward side of the rear end of the defogging friction column 301 and fall down, thereby separating the water mist from the airflow. An arc-shaped air guide plate 302 is provided at the bottom of the upper defogging chamber 315 to guide the airflow upward. The defogging friction column 301 can also be arranged horizontally or obliquely, but the effect is slightly worse.

[0038] A chimney 303 is installed at the top of the upper defogging chamber 315 to discharge the purified airflow. Below the chimney 303, a defogging channel 304 is also provided. The defogging channel is conical, converging the airflow before it is discharged upwards. The airflow is redirected by the arc-shaped air guide plate 302 and then contacts the constriction of the defogging channel 304. A second defogging device is installed at the constriction of the defogging channel 304. This second defogging device consists of many irregularly shaped fillers 305 piled at the constriction of the defogging channel 304. As the airflow is discharged upwards, water mist condenses and drips after colliding with the surface of the fillers 305. This ensures that clean gas is discharged through the exhaust pipe, and the discharged gas will not get damp even if a paper towel is placed on it.

[0039] A circulating water tank 306 is installed at the bottom of the water mist separator 300. A return water pipe 311, connected to the circulating water tank 306, is installed at the bottom of the arc-shaped air guide plate 302. Water accumulated at the bottom of the water mist separator 300 enters the circulating water tank 306 through the return water pipe 311. A return water trap 308 is installed on the drain pipe 307. The return water trap 308 forms a water seal inside the drain pipe 307, preventing airflow from escaping from the drain pipe 307. A drain pipe 309 is installed below the return water trap 308, and a drain valve 310 is installed on the drain pipe. When the drain valve 310 is opened, impurities with a density greater than water can be discharged through the drain pipe 309.

[0040] Above the circulating water tank 306, a water replenishment tank 700 is also provided. The top of the water replenishment tank 700 has a water inlet 701, and the bottom of the water replenishment tank 700 has a water inlet 702 communicating with the circulating water tank 306. A float valve cover 703 is installed at the water inlet 702. When the liquid level in the circulating water tank 306 drops, the float valve cover 703 automatically opens, allowing water from the water replenishment tank 700 to flow into the circulating water tank 306 through the water inlet 702. When the liquid level in the circulating water tank 306 rises, the float valve cover 703 automatically closes to prevent the water level in the circulating water tank from decreasing. An overflow pipe 317 is also provided on the circulating water tank 306 to prevent water from the water mist separator 300 from failing to drain into the circulating water tank 306 in case of a malfunction of the float valve cover 703.

[0041] This invention can remove methane and dust. After the clean airflow passes through forced water cleaning, the temperature in the mine can be significantly reduced, and the temperature of the exhaust gas is always kept at the same temperature as the circulating surface water. Longer flexible hoses can be used to connect the front and rear of the cleaning equipment for easy movement. A greater distance between the intake and exhaust pipes improves the air exchange effect, ensuring a continuous flow of clean gas in the mine. However, a methane-eliminating solution must be added to the water in the 306 circulating water tank because methane is an organic gas that is insoluble in water. Therefore, a trace amount of the solution must be added to the circulating water. The water vapor containing the solution will break down and rapidly decompose the organic molecules after cleaning.

Claims

1. A coal mine gas and dust explosion-proof air purification and cooling device, characterized in that It includes a volute-shaped impeller drive device, with the air inlet of the impeller drive device connected to an induced draft fan. The impeller drive device includes a volute housing and an impeller located inside the volute housing. Airflow enters the volute housing tangentially to the impeller and, upon impact with the impeller blades, drives the impeller to rotate rapidly. A water spray system facing the impeller is also installed inside and outside the volute housing. The water and airflow are forcibly agitated by the high-speed rotating impeller within the volute housing, and then discharged through an air outlet on the side of the volute housing. The air outlet of the volute housing is connected to a water mist separation box via a ventilation duct. A chimney is installed above the water mist separation box, and the airflow passing through the water mist separation box is discharged from the chimney. A [further details about the system are missing from the original text]. The circulating water tank supplies water to the spray system. A forced-stirring cleaning mesh is installed inside the ventilation duct. This mesh is located behind the side spray ring and is fixedly mounted on a rotating shaft, rotating synchronously with it. The forced-stirring cleaning mesh includes a bushing mounted on the rotating shaft. Two fixing plates are welded to the outer wall of the bushing, and a circular mesh is welded to each fixing plate. The circular mesh is a mesh plate with multiple grids. Semi-frame reinforcing ribs are provided on the two circular meshes. The upper and lower ends of the semi-frame reinforcing ribs are bent to one side to form a welding surface, which is welded to the circular mesh.

2. The coal mine gas and dust explosion-proof air purification and cooling equipment according to claim 1, characterized in that... The air inlet of the volute-shaped housing is large at the front end and small at the rear end, forming a compression air inlet. A spiral compression channel is also provided at the rear end of the compression air inlet, and the spiral compression channel decreases in size.

3. The coal mine gas and dust explosion-proof air purification and cooling equipment according to claim 1, characterized in that... The water spraying system includes an inlet water spray pipe located outside the air inlet, and a circulating water tank supplying water to the inlet water spray pipe through a main water inlet pipe; multiple inlet water spray heads extending into the air inlet are installed on the inlet water spray pipe, and the airflow at the air inlet drives the water sprayed from the inlet water spray heads to impact the blades of the wind turbine.

4. The coal mine gas and dust explosion-proof air purification and cooling equipment according to claim 1, characterized in that... The water spray system includes a side spray ring disposed on the side of the volute housing, and a circulating water tank supplies water to the inlet spray pipe through a main water inlet pipe; multiple side spray heads facing the impeller are disposed on the side spray ring.

5. The coal mine gas and dust explosion-proof air purification and cooling equipment according to claim 1, characterized in that... The wind turbine includes a rotating shaft and multiple parallel annular blade fixing plates. Blades perpendicular to the blade fixing plates are fixedly installed on the blade fixing plates, and the blade cross-section is shaped like the number 7. A connecting ring is provided on the outer wall of the rotating shaft, and a wind guide connecting plate is provided between the connecting ring and the blade fixing plates, so that the wind turbine and the rotating shaft are linked together as a whole.

6. The coal mine gas and dust explosion-proof air purification and cooling equipment according to claim 5, characterized in that... The water spraying system includes a hollow rotating shaft that is connected to an axial water inlet pipe via a mechanical seal. A circulating water tank supplies water to the rotating shaft through the axial water inlet pipe. Multiple water spray holes are provided on the side wall of the rotating shaft and are located inside the impeller. The water sprayed from the water spray holes is thrown towards the blades and continuously dispersed into water mist after impact.

7. The coal mine gas and dust explosion-proof air purification and cooling equipment according to claim 5, characterized in that... The end of the wind turbine is provided with a friction mesh, which is fixed to the outermost annular blade fixing plate of the wind turbine and rotates synchronously with the wind turbine.

8. The coal mine gas and dust explosion-proof air purification and cooling equipment according to claim 1, characterized in that... A water replenishment tank is also provided above the circulating water tank. The top of the water replenishment tank is provided with a water inlet, and the bottom of the water replenishment tank is provided with a water inlet that communicates with the circulating water tank. A float valve cover is installed at the water inlet.

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