Explosion-proof air purifying and cooling equipment for coal mine gas dust

Abstract

Explosion-proof air purifying and cooling equipment for coal mine gas dust comprises a volute-shaped wind wheel pushing device, an air inlet of the wind wheel pushing device is in butt joint with an induced draft fan, the wind wheel pushing device comprises a volute-shaped shell and a wind wheel located in the volute-shaped shell, airflow enters the volute-shaped shell in the tangential direction of the wind wheel, and the air inlet of the volute-shaped shell is in butt joint with the induced draft fan. After colliding with blades of the wind wheel, the wind wheel can be driven to rotate quickly; a water spraying system facing the wind wheel is further arranged inside and outside the worm-shaped shell, and water flow and air flow are forcibly rubbed and stirred by the wind wheel rotating at a high speed in the worm-shaped shell and then are exhausted through an air outlet in the side edge of the worm-shaped shell. According to the invention, gas with coal mine gas and dust sucked from the underside of a mine can be forcibly stirred and cleaned, so that the gas flow is in full contact with continuously exploded water flow and water mist, the gas, the dust and other harmful gases are separated from the gas flow, finally pure air is discharged, and the air under the mine can be kept fresh for a long time.

Description

Technical Field

[0001] The present invention relates to an environmental protection device for tail gas treatment, specifically an air purification and cooling device that can prevent explosion of coal mine gas dust in a mine. Background Art

[0002] Coal mine gas is the general term for toxic and harmful gases mainly composed of methane in coal mines. During the coal mining process, the coal body is damaged, and the gas originally adsorbed on the coal body and surrounding rock will desorb and enter the mine air. The mined coal will also release gas. When the concentration of gas in the air reaches a certain range (generally 5% - 16%), it will explode when encountering a fire source, generating high temperature, high pressure and a powerful shock wave, which will cause serious casualties and property losses. In addition, high-concentration gas will reduce the oxygen content in the air, leading to suffocation of personnel due to lack of oxygen. At present, it is difficult to separate and purify coal mine gas. Only through the ventilation system, fresh air is sent into the mine to dilute the gas concentration, making it lower than the explosion limit, and the gas is discharged from the mine. This method will also cause damage to the surrounding environment.

[0003] A kind of energy-saving purification device for coal mine gas ventilation, with the patent number 202420617340.8, disclosed by the Chinese Patent Office on November 19, 2024, belongs to the technical field of gas purification; it includes: a housing, and an exhaust fan is fixedly assembled at one end of the housing. The utility model provides suction through the exhaust fan, attracts harmful gases to the intake pipe, and purifies and ventilates them through a purification component. When the activated carbon filter plate in the purification component needs to be replaced, at this time, the pull ring is pulled downward, thereby driving the block to move towards the direction of the circular groove, so that the block is separated from the fixed pin. At this time, the activated carbon filter plate is pulled out along the T-shaped groove, and then the T-shaped block at the bottom of the new activated carbon filter plate is inserted into the T-shaped groove and moved towards the direction of the square groove. When the block is squeezed by the fixed pin and moves into the circular groove, when the fixed pin is completely inserted into the square groove, the block loses the extrusion, and the spring pushes the block towards the direction of the fixed pin until the block is clamped with the fixed pin, which is beneficial to improving the convenience of disassembling and assembling the activated carbon filter plate. This structure only absorbs harmful gases through activated carbon, the contact area between the air flow and the activated carbon is very small, and the absorption effect of harmful gases is very limited. Summary of the Invention

[0004] The purpose of the present invention is to provide an air purification and cooling device that can prevent explosion of coal mine gas dust in a mine in view of the defects and deficiencies of the above-mentioned prior art.

[0005] To achieve the above-mentioned purpose, the technical solution adopted by the present invention is: the coal mine gas and dust explosion-proof air purification and cooling equipment, it includes a volute-shaped wind wheel driving device, which is connected to the induced draft fan at the air inlet of the wind wheel driving device, the wind wheel driving device includes a volute casing and a wind wheel located in the volute casing, the airflow enters the volute casing along the tangent direction of the wind wheel, and after colliding with the blades of the wind wheel, it can drive the wind wheel to rotate rapidly; a water spraying system facing the wind wheel is also arranged inside and outside the volute casing, the water flow and the airflow are forced to be frictionally stirred by the high-speed rotating wind wheel in the volute casing, and then discharged through the air outlet on the side of the volute casing; the air outlet of the volute casing is connected to the water mist separation box through a ventilation duct, a chimney is arranged 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 arranged below the water mist separation box, and the water flow at the bottom of the water mist separation box circulates in the water tank, and the circulating water tank can supply water to the water spraying system.

[0006] The air inlet of the volute casing is large at the front end and small at the rear end, forming an extrusion air outlet. A spiral extrusion channel is also provided at the rear end of the extrusion air outlet, and the spiral extrusion channel is gradually reduced in size.

[0007] The water spray system includes an inlet water spray pipe arranged on the outside of the air inlet, and the circulating water tank supplies water to the inlet water spray pipe through the main water inlet pipe; a plurality of inlet water spray heads extending into the air inlet are arranged on the inlet water spray pipe, and the airflow at the air inlet drives the water sprayed from the inlet water spray heads to hit the blades of the wind wheel.

[0008] The water spray system comprises a side water spray ring arranged on the side of the volute casing, and the circulating water tank supplies water to the inlet water spray pipe through the main water inlet pipe; a plurality of side water spray heads facing the wind wheel are arranged on the side water spray ring.

[0009] The wind wheel comprises a rotating shaft and a plurality of parallel annular blade fixing plates, on which blades perpendicular to the blade fixing plates are fixedly mounted, and the blade cross-section is a 7-shaped; a connecting ring is arranged on the outer wall of the rotating shaft, and an air guide connecting piece is arranged between the connecting ring and the blade fixing plate, so that the wind wheel and the rotating shaft are linked as a whole.

[0010] The water spray system includes a rotating shaft, which is hollow and connected to an axial water inlet pipe through a mechanical seal. A circulating water tank supplies water to the rotating shaft through the axial water inlet pipe. A plurality of water spray holes are opened on the side wall of the rotating shaft. The water spray holes are located in the wind wheel. The water flow sprayed from the water spray holes is thrown toward the blades and continuously dispersed into water mist after impact.

[0011] A friction mesh is arranged at the end of the wind wheel, and the friction mesh is fixed to the outermost annular blade fixing plate of the wind wheel and rotates synchronously with the wind wheel.

[0012] A forced stirring and cleaning mesh is arranged in the ventilation duct. The forced stirring and cleaning mesh is located behind the side water spraying ring, and the forced stirring and cleaning mesh is fixedly sleeved on the rotating shaft and rotates synchronously with the rotating shaft.

[0013] The forced stirring and cleaning mesh includes a shaft sleeve sleeved on the rotating shaft. Two fixing pieces are welded on the outer wall of the shaft sleeve, and a circular mesh is welded on each fixing piece. The circular mesh is a mesh plate with a plurality of meshes; semi-frame-shaped reinforcing ribs are arranged on the two circular meshes. The upper and lower ends of the semi-frame-shaped reinforcing ribs are bent towards one side to form a welding surface, and the welding surface is welded to fit the circular mesh.

[0014] A water replenishing tank is further arranged above the circulating water tank. A water filling port is arranged at the top of the water replenishing tank, a water replenishing port communicated with the circulating water tank is arranged at the bottom of the water replenishing tank, and a float valve cover is installed at the water replenishing port.

[0015] The present invention can forcibly stir and clean the gas with coal mine gas and dust inhaled from below the mine, so that the air flow fully contacts with the continuously exploding water flow and water mist, separates the gas, dust and other harmful gases from the air flow, and finally discharges pure air, which can keep the air fresh below the mine for a long time. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic structural diagram of the present invention.

[0017] Figure 2 It is a schematic structural diagram of the wind wheel pushing device of the present invention.

[0018] Figure 3 It is a top view schematic diagram of the wind wheel of the present invention.

[0019] Figure 4 It is a sectional view schematic diagram of the wind wheel of the present invention.

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

[0021] Figure 6 It is a schematic structural diagram of the forced stirring and cleaning mesh of the present invention.

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

[0023] Figure 8 It is a schematic structural diagram of the water mist separation tank of the present invention. DETAILED DESCRIPTION OF THE INVENTION

[0024] Such as Figure 1 、 Figure 2As shown in the figure, the present invention is a coal mine gas and dust explosion-proof air purification and cooling device, which can continuously ventilate the mine shaft. When a gas fracture layer occurs, the gas can be quickly sucked out, and the gas in the air flow can be separated and purified, so that the phenomenon of coal mine gas explosion will disappear forever, and the dust in the mine shaft will also be sucked clean, enabling the air in the mine shaft to remain fresh for a long time.

[0025] The coal mine gas and dust explosion-proof air purification and cooling device includes a volute-shaped wind wheel driving device 100. The housing flange 107 of the air inlet 102 of the wind wheel driving device 100 is docked with an induced draft fan. The suction pipe of the induced draft fan extends deep into the mine shaft. When the induced draft fan works, the turbid gas mixed with gas and dust in the mine is sucked in and conveyed to the wind wheel driving device 100.

[0026] The wind wheel driving device 100 mentioned above includes a volute housing 101 and a wind wheel 500 located inside the volute housing 101. The air inlet 102 of the volute housing 101 is large at the front end and small at the rear end, forming a squeezing air outlet 103, so that the air flow is compressed at the squeezing air outlet 103 and enters the volute housing 101 along the tangent direction of the wind wheel 500. After hitting the blades 501 of the wind wheel 500, it can drive the wind wheel 500 to rotate rapidly. A spiral extrusion channel 104 is also provided at the rear end of the squeezing air outlet 103. The spiral extrusion channel 104 becomes smaller from large, so that the air pressure increases during the movement process, ensuring that each blade 501 of the wind wheel 500 is uniformly and continuously pushed, thereby accelerating the rotation speed of the wind wheel 500.

[0027] The present invention also includes a circulating water tank 306. A drain pipe 307 is provided at the bottom of the circulating water tank 306, and the end of the drain pipe 307 is provided with a water pump 312 for suction. The output end of the water pump 312 is installed with a circulating water outlet pipe 313. A trace amount of gas elimination liquid medicine water is added to the water in the circulating water tank 306, so that the gas can quickly dissolve in the water and be cleaned and decomposed, which is beneficial to the complete elimination of gas. An inlet spray pipe 403 is provided outside the air inlet 102, and a plurality of inlet spray heads 404 extending into the air inlet 102 are provided on the inlet spray pipe 403. The air flow at the air inlet 102 can drive the water flow sprayed by the inlet spray heads 404 to hit the wind wheel 500 together, and the first forced friction stirring is completed during the impact process. The inlet spray pipe 403 is connected to the circulating water outlet 313 through a main water inlet pipe 405, so that the circulating water outlet 313 can supply water to the inlet spray pipe 403.

[0028] Both ends of the volute housing 101 of the wind wheel driving device 100 are provided with openings. A closed cavity 106 is provided at one opening end. A sealing plate 105 is arranged outside the closed cavity 106 to seal the outer end of the closed cavity 106, so that air flow cannot be discharged from the closed cavity 106. The sealing plate 105 and the closed cavity 106 are connected by bolts, which is convenient for disassembly and maintenance. The other opening end of the volute housing 101 is the air outlet, and the ventilation duct 200 is butted against the air outlet of the volute housing 101 of the wind wheel driving device 100 through the duct flange 204.

[0029] As Figure 3 , Figure 4 shown, a rotating shaft 402 is installed at the center of the wind wheel 500, and the wind wheel 500 and the rotating shaft 402 can rotate synchronously. A cross connecting frame 406 is installed in the closed cavity 106. The outer wall of the mechanical seal 401 is buckled with the cross bearing seat 407, and the cross bearing seat 407 and the cross connecting frame 406 are connected by bolts 410. A cross connecting frame 406 is also arranged in the ventilation duct 200. A cross bearing seat 407 is installed on the rotating shaft 402, and the cross bearing seat 407 and the cross connecting frame 406 are connected by bolts 410.

[0030] The wind wheel 500 includes a plurality of parallel annular blade fixing plates 502 and blades 501 fixed on the blade fixing plates 502. A connecting ring 506 is arranged on the outer wall of the rotating shaft 402. A wind guiding connecting piece 505 is arranged between the connecting ring 506 and the blade fixing plate 502, so that the wind wheel 500 and the rotating shaft 402 are integrally linked. The cross section of each blade 501 is in the shape of a "7", and the impact of the air flow on the blade 501 will push the wind wheel 500 to rotate. An inner reinforcing ring 503 is arranged inside the wind wheel 500, and the inner reinforcing ring 503 is connected to the inner end of each blade 501. An outer reinforcing ring 504 is arranged outside the wind wheel 500, and the outer reinforcing ring 504 is connected to the outer end of each blade 501, so as to strengthen the strength of the blade 501. The spiral extrusion channel 104 becomes smaller from large, so that the air flow pressure increases during the movement process, ensuring that each blade 501 of the wind wheel 500 is uniformly and continuously pushed, thereby accelerating the rotation speed of the wind wheel 500. An air flow guiding piece 507 is also arranged on the wind guiding connecting piece 505, and the air flow guiding piece 507 can push the air flow to rotate spirally so that the air flow can fully rub against the blade 501.

[0031] The interior of the rotating shaft 402 is hollow. An axial water inlet pipe 400 is inserted through the center of the sealing plate 105. The axial water inlet pipe 400 is docked with the rotating shaft 402 through a mechanical seal 401. The axial water inlet pipe 400 is also connected to the circulating water outlet 313. The circulating water outlet 313 can supply water to the axial water inlet pipe 400 and enter the inner hole of the rotating shaft 402. A plurality of water spraying holes 411 are formed on the side wall of the rotating shaft 402. The water spraying holes 411 are located inside the wind wheel 500. The water flow sprayed out from the water spraying holes 411 is thrown towards the blades 501 and continuously broken up after impact. The air flow and the water flow are subjected to a second forced friction and stirring inside the wind wheel. The gas and dust in the turbid gas can be quickly dissolved in water and separated out. A coupling 412 is provided at the end of the rotating shaft 402. Through the coupling 412, the end of the rotating shaft 402 is closed, and the hollow rotating shaft 402 is docked with the rear shaft body. If the coupling 412 and the rear shaft body are not installed, a plug can also be provided at the end of the rotating shaft 402 to close the end of the rotating shaft 402.

[0032] A friction mesh sheet 508 is provided at the end of the wind wheel 500. The friction mesh sheet 508 is fixed to the outermost annular blade fixing plate 502 of the wind wheel 500 and rotates synchronously with the wind wheel 500. When the air flow and the water flow are discharged backward through the wind wheel, they will collide with the high-speed rotating friction mesh sheet 508 and then undergo another friction and stirring. A side water spraying ring 408 is provided on the side of the volute-shaped housing. The side water spraying ring 408 can be installed in the closed cavity 106 and the ventilation duct 200. A plurality of side water spraying heads 409 facing the wind wheel 500 are provided on the side water spraying ring 408. The side water spraying heads 409 supply water to the inside of the wind wheel 500. In particular, the side water spraying ring 409 can continuously generate a water film on the friction mesh sheet 508. The air flow must collide with the water film before it can be discharged backward, thereby forming a third forced friction and stirring. And the side water spraying ring 409 is opposite to the air flow direction. Therefore, the water flow and the air flow explode into water mist after collision, covering the entire ventilation duct 200. The side water spraying ring 408 is also connected to the circulating water outlet 313. The circulating water outlet 313 can supply water to the axial side water spraying ring 408 As Figure 6 As shown, a forced stirring and cleaning mesh sheet 600 is also provided on the rotating shaft 402. The forced stirring and cleaning mesh sheet 600 is located behind the side water spraying ring 408. The high-speed rotating rotating shaft 402 can drive the forced stirring and cleaning mesh sheet 600 to rotate rapidly. The water flow sprayed out by the side water spraying ring 409 collides with the forced stirring and cleaning mesh sheet 600 that rotates at high speed after exploding with the air flow, so that the water flow is broken up into water mist. The forced stirring and cleaning mesh sheet 600 includes a shaft sleeve 601 sleeved on the rotating shaft 402. A key 606 is installed between the shaft sleeve 601 and the rotating shaft 402 to make the shaft sleeve 601 rotate synchronously with the rotating shaft 402.

[0033] Two fixing pieces 602 are welded to the outer wall of the bushing 601, with a certain spacing between the fixing pieces 602. A circular mesh piece 603 is welded to each fixing piece 602. The circular mesh piece 603 is a mesh plate with multiple meshes. A semi-frame-shaped reinforcing rib 604 is arranged on the two circular mesh pieces 603 to increase the strength of the forced stirring and cleaning mesh piece 600. The upper and lower ends of the semi-frame-shaped reinforcing rib 604 are bent to one side to form a welding surface, facilitating welding with the circular mesh piece 603. The radial reinforcing rib semi-frame-shaped reinforcing rib 604 is made of a mesh plate with multiple meshes, so the radial reinforcing rib semi-frame-shaped reinforcing rib 604 can also participate in the frictional stirring of water mist and air flow. The number of radial reinforcing ribs 607 at the outer edge of the circular mesh piece 603 is increased to narrow the gap between the radial reinforcing ribs 607. Even diagonal strip reinforcing ribs 608 can be arranged on the radial reinforcing ribs 607, making the reinforcing ribs like branches, so that there are no obvious large gaps in the circular mesh piece 603.

[0034] As Figure 5 , Figure 6 , Figure 7 shown, the ventilation duct 200 is in a stepped shape, the inner diameter of the rear-stage air duct is larger than that of the front-stage air duct. The forced stirring and cleaning mesh piece 600 is installed between the two-stage air ducts, and an air separation groove 201 is formed between the front-stage air duct and the rear-stage air duct. The rear end of the front-stage air duct is provided with an outwardly turned trumpet mouth 202, thereby narrowing the rear opening of the air separation groove 201. A water blocking collar 605 is arranged on the outer edge of the forced stirring and cleaning mesh piece 600. The rear end of the water blocking collar 605 is bent outward to form a welding surface, and the welding surface is welded to the edge of the upper circular mesh piece 603. The front end of the water blocking collar 605 extends into the air separation groove 201 to form an air separation and water blocking wall. Through the settings of the trumpet mouth 202 and the air separation and water blocking wall, it can prevent the air flow from being discharged from the outside of the forced stirring and cleaning mesh piece 600, avoiding some air flow from directly discharging backward without passing through the forced stirring and cleaning mesh piece 600.

[0035] A gas blocking ring 203 is further arranged at the rear side of the forced stirring and cleaning mesh piece 600. The gas blocking ring 203 is directly fixed to the inner wall of the ventilation duct 200 by screws, covering the rear side of the gap between the forced stirring and cleaning mesh piece 600 and the ventilation duct 200, further preventing the air flow from being discharged from the outside of the forced stirring and cleaning mesh piece 600. The air flow and water flow are subjected to the fourth forced frictional stirring at the forced stirring and cleaning mesh piece 600, further effectively removing gas and dust in the air flow.

[0036] Two forced stirring and cleaning mesh pieces 600 can be installed. A side water spraying ring 408 connected to the total water inlet pipe 405 is also installed on the front side of the rear forced stirring and cleaning mesh piece 600. The side water spraying heads on the side water spraying ring 408 are opposite to the air flow direction. After the water flow impacts the air flow, it explodes into water mist, covering the entire rear forced stirring and cleaning mesh piece 600.

[0037] As Figure 8 shown, the rear end of the ventilation duct 200 is a water mist separation box 300. The ventilation duct 200 is butt - jointed with the side surface of the water mist separation box 300 through a rear - end 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 installation cavity 314 at the front side and an upper - row demisting cavity 315 at the rear side. The friction column installation cavity 314 and the upper - row demisting cavity 315 at the rear side are connected through a demisting cavity flange 316. A plurality of rows of demisting friction columns 301 are arranged in the friction column installation cavity 314, and the plurality of rows of demisting friction columns 301 are arranged staggeredly so that the airflow can impact them as much as possible. The front end of the demisting friction column 301 is sharp and the rear end is smooth. After the water mist frictions against the side wall of the demisting friction column 301, it can condense and fall at the leeward side of the rear end of the demisting friction column 301, thereby separating the water mist from the airflow. An arc - shaped air deflector 302 is arranged at the bottom of the upper - row demisting cavity 315, which can deflect the airflow upward. The demisting friction column 301 can also be arranged horizontally or obliquely, but the effect is slightly worse.

[0038] A chimney 303 is arranged at the top of the upper - row demisting cavity 315 for discharging the purified airflow. A demisting channel 304 is also arranged below the chimney 303. The demisting channel is conical, which converges the airflow and discharges it upward. After the airflow is deflected by the arc - shaped air deflector 302 and then contacts the constriction of the demisting channel 304 upward. A second - stage demisting device is arranged at the constriction of the demisting channel 304. The second - stage demisting device includes many irregular fillers 305 stacked at the constriction of the demisting channel 304. When the airflow is discharging upward, the water mist will condense and drip after impacting the surface of the fillers 305. Only in this way can the clean gas be discharged outside the exhaust pipe, and the discharged gas will not get damp even when placed with a paper napkin.

[0039] A circulation water tank 306 is arranged at the bottom of the water mist separation box 300. A return water pipe 311 communicating with the circulation water tank 306 is arranged at the bottom of the arc - shaped air deflector 302. The water flow accumulating at the bottom of the water mist separation box 300 enters the circulation water tank 306 through the return water pipe 311. A return water bend 308 is arranged on the drain pipe 307. The return water bend 308 can form a water seal in the drain pipe 307 to prevent airflow from being discharged from the drain pipe 307. A sewage pipe 309 is arranged below the return water bend 308, and a sewage valve 310 is arranged on the sewage pipe. After the sewage valve 310 is opened, impurities of objects with a density greater than water can be discharged through the sewage pipe 309.

[0040] Above the circulating water tank 306, a make-up water tank 700 is also provided. At the top of the make-up water tank 700, a water filling port 701 is provided. At the bottom of the make-up water tank 700, a make-up water port 702 communicating with the circulating water tank 306 is provided. A float valve cover 703 is installed at the make-up water port 702. When the liquid level in the circulating water tank 306 drops, the float valve cover 703 will automatically open, and the water in the make-up water tank 700 will flow into the circulating water tank 306 through the make-up water port 702. After the liquid level in the circulating water tank 306 rises, the float valve cover 703 will automatically close to prevent the water in the circulating water tank from decreasing. An overflow pipe 317 is also provided on the circulating water tank 306 to prevent the water in the mist separation tank 300 from being unable to drain into the circulating water tank 306 when the float valve cover 703 fails.

[0041] The present invention can remove gas and dust. After the clean air flow is forcibly washed with water, the temperature underground in the mine can also be greatly reduced. The temperature of the discharged gas always remains the same as that of the circulating surface water. Before and after the cleaning equipment, hoses with a longer length can be used for connection, which is convenient for moving the suction pipe opening farther away and the exhaust gas pipe opening farther away, and the circulating ventilation effect is better. The underground in the mine can always maintain continuous circulation of clean gas. However, a gas elimination liquid medicine must be added to the water in the circulating water tank 306. Because gas is an organic gas and it is insoluble in water, a small amount of medicine must be added to the circulating water. After the water vapor with the medicine is washed, the organic molecules will be broken and quickly decomposed.

Claims

1. An explosion-proof air purification and cooling device for coal mine gas and dust, characterized in that It includes a volute-shaped wind wheel driving device, the air inlet of the wind wheel driving device is butted with an induced draft fan. The wind wheel driving device includes a volute-shaped housing and a wind wheel located inside the volute-shaped housing. Airflow enters the volute-shaped housing along the tangential direction of the wind wheel. After hitting the blades of the wind wheel, it can drive the wind wheel to rotate rapidly. A water spraying system facing the wind wheel is also arranged inside and outside the volute-shaped housing. The water flow and the airflow are forced to be frictionally stirred by the high-speed rotating wind wheel inside the volute-shaped housing, and then discharged through the air outlet on the side of the volute-shaped housing. The air outlet of the volute-shaped housing is connected to a water mist separation box through a ventilation duct. A chimney is arranged 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 arranged below the water mist separation box. The water flow at the bottom of the water mist separation box enters the circulating water tank, and the circulating water tank can supply water to the water spraying system.

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 squeezing air inlet. A spiral squeezing channel is also arranged at the rear end of the squeezing air inlet, and the spiral squeezing channel becomes smaller from large.

3. The explosion-proof air purification and temperature reduction equipment for coal mine gas and dust, characterized in that The water spraying system includes an inlet water spray pipe arranged outside the air inlet. The circulating water tank supplies water to the inlet water spray pipe through a main water supply pipe. A plurality of inlet water spray heads extending into the air inlet are arranged on the inlet water spray pipe. The airflow at the air inlet drives the water flow sprayed by the inlet water spray heads to hit the blades of the wind wheel together.

4. 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 a side water spray ring arranged on the side of the volute-shaped housing. The circulating water tank supplies water to the inlet water spray pipe through a main water supply pipe. A plurality of side water spray heads facing the wind wheel are arranged on the side water spray ring.

5. The explosion-proof air purification and cooling equipment for coal mine gas and dust, characterized in that The wind wheel includes a rotating shaft and multiple parallel annular blade fixing plates. Blades perpendicular to them are fixedly installed on the blade fixing plates, and the cross-section of the blades is in the shape of a "7". A connecting ring is arranged on the outer wall of the rotating shaft, and a wind guiding connecting piece is arranged between the connecting ring and the blade fixing plate, so that the wind wheel and the rotating shaft are integrally linked.

6. The explosion-proof air purification and cooling equipment for coal mine gas and dust, characterized in that The water spraying system includes a rotating shaft, the rotating shaft is hollow, the rotating shaft is butted with an axial water supply pipe through mechanical seal, and the circulating water tank supplies water to the rotating shaft through the axial water supply pipe. A plurality of water spraying holes are opened on the side wall of the rotating shaft, the water spraying holes are located inside the wind wheel, and the water flow sprayed out of the water spraying holes is thrown towards the blades and continuously broken into water mist after hitting.

7. The explosion-proof air purification and cooling equipment for coal mine gas and dust, characterized in that A friction mesh sheet is arranged at the end of the wind wheel, and the friction mesh sheet is fixed to the outermost annular blade fixing plate of the wind wheel and rotates synchronously with the wind wheel.

8. The explosion-proof air purification and cooling equipment for coal mine gas and dust, characterized in that A forced stirring and cleaning mesh sheet is arranged inside the ventilation duct. The forced stirring and cleaning mesh sheet is located behind the side water spray ring, and the forced stirring and cleaning mesh sheet is fixedly sleeved on the rotating shaft and rotates synchronously with the rotating shaft.

9. The explosion-proof air purification and cooling equipment for coal mine gas and dust, characterized in that The forced stirring and cleaning mesh sheet includes a shaft sleeve sleeved on the rotating shaft. Two fixing pieces are welded on the outer wall of the shaft sleeve, and a circular mesh sheet is welded on each fixing piece. The circular mesh sheet is a mesh plate with a plurality of meshes. Semi-frame-shaped reinforcing ribs are arranged on the two circular mesh sheets. The upper and lower ends of the semi-frame-shaped reinforcing ribs are bent towards one side to form a welding surface, and the welding surface is welded to the circular mesh sheet.

10. The explosion-proof air purification and cooling equipment for coal mine gas and dust, characterized in that A water replenishing tank is also arranged above the circulating water tank. A water filling port is arranged at the top of the water replenishing tank, a water replenishing port communicated with the circulating water tank is arranged at the bottom of the water replenishing tank, and a float valve cover is installed at the water replenishing port.

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