Multistage filtering and purifying wet dust removal fan for mine

Abstract

This invention discloses a multi-stage filtration and purification wet dust collector for mining, comprising a fan casing, a protective net at the inlet of the fan casing, a power mechanism behind the protective net, a spray system between the power mechanism and the protective net, a filter assembly with a funnel-shaped structure on the side of the power mechanism away from the spray system, a flow divider on the inner side of the end of the filter assembly, and a gas-water separator on the side of the filter assembly away from the spray system. This invention first sprays the mine airflow, then dehumidifies and removes dust from the rotating airflow. The flow divider at the center of the filter assembly directs the airflow concentrated in the narrow central area towards the surrounding sidewalls of the filter, transforming the central airflow into a diffused airflow for thorough and efficient filtration. Simultaneously, the multi-stage detachable baffles of the gas-water separator further separate the gas and water, allowing for the addition or removal of stages as needed, improving scene adaptability and the separation effect of the gas-water separator, and reducing the liquid-to-gas ratio of the purified air.

Description

Technical Field

[0001] This invention relates to the field of dust removal fan technology, and in particular to a multi-stage filtration and purification wet dust removal fan for mining. Background Technology

[0002] Coal is a primary energy source in my country, and as the world's largest coal consumer, it accounts for over 70% of my country's primary energy production and consumption. With the increasing demand for coal energy, exploration and mining efforts have intensified, and tunneling technology and coal mining efficiency have developed rapidly. However, this has also led to an increasingly serious problem of dust accumulation and pollution in tunnels. Dust accumulation can easily cause explosions, and excessively high dust concentrations in tunnels can harm the health of underground workers, increasing the risk of diseases such as pneumoconiosis.

[0003] The increasing mechanization of coal mines has led to problems such as increased dust production and escalating dust hazards underground. According to underground measurements, the dust concentration at fully mechanized tunneling faces can reach as high as 2500 mg / m³. 3 High dust concentrations in coal mines severely restrict safe and efficient mining operations. Excessive dust concentrations in roadways not only easily lead to explosions but also seriously endanger the occupational health of underground workers. Pneumoconiosis, a systemic disease caused by long-term inhalation of respirable dust and its accumulation in the lungs, is a major source of dust generation in underground operations. Many experts and scholars have conducted extensive research on dust generation mechanisms and prevention measures. However, most wet dust collectors currently used in coal mines are axial flow fans, which are noisy and have a high liquid-to-gas ratio in the purified air, affecting the underground working environment and causing increased discomfort for underground workers, more electrical component failures, and severe corrosion of mechanical parts. Therefore, designing a mine wet dust collector with multi-stage filtration and purification functions is essential. Summary of the Invention

[0004] The purpose of this invention is to overcome the shortcomings of the prior art and provide a multi-stage filtration and purification wet dust removal fan for mining. First, a spray system sprays the mine airflow. Then, a filter assembly and an air-water separator dehumidify and remove dust from the rotating airflow. The filter assembly causes the rotating airflow to move along its surrounding sidewall filter screen. A distributor in the center of the filter assembly directs the airflow concentrated in the narrow central area to the surrounding sidewalls of the filter screen, transforming the central airflow into a diffused airflow for thorough and efficient filtration. Simultaneously, the multi-stage detachable baffles of the air-water separator further separate the air and water. The number of stages can be increased or decreased as needed, improving scene adaptability and the separation effect of the air-water separator, and reducing the liquid-to-gas ratio of the purified air.

[0005] To achieve the above objectives, the technical solution adopted by the present invention is as follows: a multi-stage filtration and purification wet dust removal fan for mining, comprising a fan housing, a protective net at the inlet of the fan housing, a power mechanism at the rear of the protective net, a spray system between the power mechanism and the protective net, a filter assembly on the side of the power mechanism away from the spray system, the filter assembly having a funnel-shaped structure, a flow divider on the inner side of the end of the filter assembly away from the power mechanism, the bottom of the flow divider being securely connected to the bottom support frame of the filter assembly, an air-water separator on the side of the filter assembly away from the spray system, the air-water separator being detachably connected to the inner wall of the fan housing, and the central axes of the air-water separator, the flow divider, and the filter assembly all coinciding with the central axis of the fan housing.

[0006] Preferably, the spray system includes atomizing nozzles and a water inlet pipe. The number of atomizing nozzles is multiple, and the multiple atomizing nozzles are equally spaced along the inner wall of the fan housing. Each atomizing nozzle is connected to the water inlet pipe.

[0007] Preferably, the power mechanism includes swirl blades and an explosion-proof motor. The explosion-proof motor is installed inside a motor protective cover within the fan housing. The output shaft of the explosion-proof motor is connected to the swirl blades to facilitate the rotation of the swirl blades.

[0008] Preferably, the filter assembly includes a primary concave filter and a secondary convex filter. The primary concave filter is embedded in the secondary convex filter. The π-shaped cross-section connecting frame at both ends of the primary concave filter is tenon-and-mortise connected to the fan housing to secure the filter assembly to the fan housing.

[0009] Preferably, the diverter has a conical structure and is installed at the center of the bottom of the filter assembly. The apex of the diverter is located inside the filter assembly to facilitate the diverter's side from guiding the airflow.

[0010] Preferably, the filter assembly further includes a bottom connector, on one side of which a distributor, a primary concave filter screen, and a secondary convex filter screen are sequentially connected from the center outwards, and an air-water separator is provided on the side of the bottom connector away from the distributor.

[0011] Preferably, the gas-water separator includes a first gas-water separator and a second gas-water separator. Both the first and second gas-water separators are connected to the inner wall of the fan housing. The second gas-water separator is located on the side of the first gas-water separator away from the filter assembly. The second gas-water separator includes multiple baffles, which are arranged in series and respectively inserted into the inner wall of the fan housing.

[0012] Preferably, the first air-water separator includes a support ring, a pre-separation baffle, and support rods. The support ring is connected to the inner wall of the fan housing. There are multiple pre-separation baffles and support rods. The multiple support rods are spaced apart along the circumference of the support ring. Each support rod is connected to the support ring and the first-stage baffle at both ends along its length. The multiple pre-separation baffles are inclined and fastened to the support rods along the circumference of the support ring to increase the contact area between the airflow and the pre-separation baffles.

[0013] Preferably, the primary concave filter screen is provided with a guide groove to facilitate the water flow to the guide pipe, the guide pipe is connected to the water collection tank, and the water collection tank is located on the bottom outer side of the fan casing.

[0014] Preferably, a dust sensor is installed at the air outlet of the fan casing to facilitate the detection of the air quality after treatment.

[0015] Compared with the prior art, the present invention has the following advantages:

[0016] 1. This invention first sprays the mine airflow through a spray system, and then dehumidifies and removes dust from the rotating airflow through a filter assembly and an air-water separator. The filter assembly causes the rotating airflow to move along the filter screen on its surrounding side walls. The splitter in the center of the filter assembly causes the airflow concentrated in the narrow central area to move to the surrounding side walls of the filter screen, transforming the airflow in the central area into a diffused airflow, achieving full and efficient filtration. At the same time, the multi-stage detachable baffles of the air-water separator further separate the air and water. The number of stages can be increased or decreased as needed, improving the adaptability to different scenarios and the separation effect of the air-water separator, and reducing the liquid-to-gas ratio of the purified air.

[0017] 2. The filter assembly of the present invention includes a primary concave filter screen, a secondary convex filter screen, and a flow divider. The flow divider is located at the bottom center of the primary concave filter screen and the secondary convex filter screen, and guides the rotating airflow entering the filter assembly to prevent the rotating airflow from flowing out from the bottom center of the primary concave filter screen and the secondary convex filter screen. This solves the problem that the large air volume on the central axis causes the air-water separator to be prone to corrosion and malfunction.

[0018] 3. The present invention provides a motor protective cover inside the fan casing, placing the explosion-proof motor inside the motor protective cover, which isolates the noise generated by the explosion-proof motor during operation and solves the problem of high noise in the mine.

[0019] 4. The connecting frame of the first-stage concave filter screen and the second-stage convex filter screen of the present invention is a π-shaped cross-section connecting frame. The lower end opening of the π-shaped cross-section connecting frame forms a guide groove, which facilitates the guidance of separated droplets to the guide pipe, reduces the water distribution of other structures, and extends the service life of the equipment.

[0020] 5. The gas-water separator of the present invention includes a first gas-water separator and a second gas-water separator. The first gas-water separator guides the rotating airflow and separates the gas and water. The second gas-water separator is composed of multiple baffles connected in series. The number of baffles can be determined according to the dust concentration and humidity conditions in the well, so that the dust removal fan can be adapted from low dust and low humidity to high dust and high humidity, thereby improving the applicability of the dust removal fan.

[0021] 6. The first-stage concave filter and the second-stage convex filter of the present invention filter high-humidity airflow. The droplets in the high-humidity airflow impact the filter and form a continuous water film on its surface. The synergistic effect of the inertial collision of the high-humidity airflow and the adhesion of the water film improves the capture rate of fine dust. The funnel-shaped structure of the first-stage concave filter and the second-stage convex filter increases the effective filtration area of ​​the filter.

[0022] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the structure of the present invention;

[0024] Figure 2 This is a schematic diagram of the gas-water separator of the present invention;

[0025] Figure 3 for Figure 2 Side view;

[0026] Figure 4 This is a schematic diagram of the structure of the filter component of the present invention.

[0027] Explanation of reference numerals in the attached figures:

[0028] 1—Fan casing; 2—Protective netting; 3—Spraying system;

[0029] 4—Filter assembly; 5—Diverter; 6—First gas-liquid separator;

[0030] 7—Second air-water separator; 8—Atomizing nozzle; 9—Water inlet pipe;

[0031] 10—Swirl vanes; 11—Explosion-proof motor; 12—Motor protective cover;

[0032] 13—First-stage concave filter screen; 14—Second-stage convex filter screen;

[0033] 15—Support ring; 16—Pre-separation baffle; 17—Support rod;

[0034] 18—Baffle plate; 19—Guide pipe; 20—Water collection tank;

[0035] 21—Dust sensor; 22—Bottom connector; 23—Motor bracket. Detailed Implementation

[0036] like Figures 1 to 3 As shown, this invention discloses a multi-stage filtration and purification wet dust collector for mining, including a fan housing 1. A protective net 2 is provided at the inlet of the fan housing 1. A power mechanism is provided behind the protective net 2. A spray system 3 is provided between the power mechanism and the protective net 2. A filter assembly 4 is provided on the side of the power mechanism away from the spray system 3. The filter assembly 4 has a funnel-shaped structure. A diverter 5 is provided on the inner side of the end of the filter assembly 4 away from the power mechanism. The bottom of the diverter 5 is fastened to the bottom support frame of the filter assembly 4. A gas-water separator is provided on the side of the filter assembly 4 away from the spray system 3. The gas-water separator is detachably connected to the inner wall of the fan housing 1. The central axes of the gas-water separator, the diverter 5, and the filter assembly 4 all coincide with the central axis of the fan housing 1.

[0037] In this embodiment, the protective net 2 is detachably installed at the air inlet of the fan housing 1 to facilitate the filtration of larger dust particles in the polluted air, achieving the first stage of filtration. The spray system 3 is installed in the annular transition section of the air inlet, spraying water mist onto the airflow passing through the protective net 2, so that the airflow and water mist are fully mixed to form a dust-laden, high-humidity airflow. When the power mechanism is working, it generates a rotating airflow. Under the action of the rotating airflow, the dust-laden, high-humidity airflow moves towards the filter assembly 4. Since a diverter 5 is provided at the bottom center of the filter assembly 4, when the dust-laden, high-humidity airflow moves backward to the bottom center area of ​​the filter assembly 4, the central passage of the filter assembly 4 is occupied by the diverter 5, and the dust-laden, high-humidity airflow cannot move along the fan. The central axis of the outer casing 1 passes directly through the filter assembly 4 and can only flow around the outer surface of the distributor 5. Under the combined influence of the centrifugal force and the conical surface of the distributor 5, the dust-laden and humid airflow diffuses from the center to the circumference and radial direction and is guided into the surrounding filter assembly 4 for filtration. The distributor 5 transforms the dust-laden and humid airflow concentrated in the narrow central area of ​​the filter assembly 4 into a uniformly distributed diffused airflow flowing to the circumference of the filter assembly 4, thereby improving the filtration efficiency of the filter assembly 4 and preventing excessive airflow at the central axis of the filter assembly 4. After passing through the filter assembly 4, the airflow enters the air-water separator. After the air-water separator separates the airflow into water, the dry airflow is discharged from the outlet of the fan casing 1.

[0038] The spray system 3 includes atomizing nozzles 8 and water inlet pipes 9. There are multiple atomizing nozzles 8, which are equally spaced along the inner wall of the fan housing 1. Each atomizing nozzle 8 is connected to the water inlet pipe 9.

[0039] In this embodiment, the number of atomizing nozzles 8 is determined according to the circumferential length of the inner wall of the fan housing 1. Multiple atomizing nozzles 8 are arranged at circumferential intervals along the inner wall of the fan housing 1. The nozzle of each atomizing nozzle 8 faces the central axis of the fan housing 1 in the length direction. The water inlet pipe 9 is a high-pressure water pipeline that transports high-pressure water to the atomizing nozzles 8. The end of the water inlet pipe 9 away from the atomizing nozzles 8 is connected to a high-pressure water pump. The high-pressure water pump pressurizes the filtered water and sends it to the atomizing nozzles 8 through the water inlet pipe 9. The atomizing nozzles 8 spray the high-pressure water in the form of water mist. After the airflow through the protective net 2 mixes with the water mist, a dust-laden and humid airflow is formed.

[0040] The power mechanism includes a swirl blade 10 and an explosion-proof motor 11. The explosion-proof motor 11 is installed inside a motor protective cover 12 inside the fan housing 1. The output shaft of the explosion-proof motor 11 is connected to the swirl blade 10 to facilitate the rotation of the swirl blade 10.

[0041] In this embodiment, the explosion-proof motor 11 is installed inside the motor sealing cover. The motor sealing cover can prevent the explosion-proof motor 11 from being corroded by dust, dust-laden droplets or water mist, thereby improving the service life of the explosion-proof motor 11. The motor sealing cover isolates the explosion-proof motor 11 from external equipment, reducing the noise generated by the explosion-proof motor 11 during operation. The motor sealing cover is located inside the fan housing 1 and behind the atomizing nozzle 8. The central axis of the motor sealing cover overlaps with the central axis of the fan housing 1. The output shaft of the explosion-proof motor 11 extends out of the motor sealing cover and is securely connected to the swirl vane 10. When the explosion-proof motor 11 is started, the explosion-proof motor 11 drives the swirl vane 10 to rotate synchronously. The high-speed rotation of the swirl vane 10 generates a rotating airflow. The dust-laden and humid airflow moves towards the filter assembly 4 under the action of the rotating airflow.

[0042] The motor sealing cover includes a sealing cover body and a fixed bracket. One end of the fixed bracket along the length direction is welded to the inner wall of the fan housing 1, and the end of the fixed bracket away from the fan housing 1 along the length direction is welded to the outer wall of the sealing cover body, so that the sealing cover body is located at the center inside the fan housing 1 and remains in a fixed position.

[0043] The filter assembly 4 includes a primary concave filter screen 13 and a secondary convex filter screen 14. The primary concave filter screen 13 is embedded in the secondary convex filter screen 14. The π-shaped cross-section connecting frame at both ends of the primary concave filter screen 13 is tenon-and-mortise connected to the fan housing 1, so that the filter assembly 4 is fastened to the fan housing 1.

[0044] In this embodiment, there are multiple π-shaped cross-section connecting frames. Multiple π-shaped cross-section connecting frames are arranged along the circumference of the primary concave filter screen 13. Each π-shaped cross-section connecting frame extends from the top to the bottom of the primary concave filter screen 13 along its length. The middle groove of the π-shaped cross-section connecting frame serves as a guide channel for guiding sewage, and the grooves on both sides serve as mounting grooves for installing filter plates. The ends of the π-shaped cross-section connecting frames at the upper and lower ends of the primary concave filter screen 13 are tenon-and-mortise connected to the fan housing 1, making it easy to install and disassemble the primary concave filter screen 13. The filter screen at the overlap between the primary concave filter screen 13 and the secondary convex filter screen 14 is bent inward, so that there is a distance between the filter screens at the overlap between the primary concave filter screen 13 and the secondary convex filter screen 14, thereby improving the filtration capacity of the filter screen for airflow.

[0045] In another possible embodiment, the bottom of the filter assembly 4 is an annular structure. The primary concave filter screen 13 includes multiple π-shaped cross-section connecting frames, multiple support frames, and multiple filter screens. The support frames are circular structures, and each support frame has multiple equally spaced mounting grooves on its inner wall. The size of the mounting grooves matches the width of the π-shaped cross-section connecting frames. The π-shaped cross-section connecting frames gradually taper inward along their length. One end of the π-shaped cross-section connecting frame along its length is fastened to the mounting groove of the support frame, and the end of the π-shaped cross-section connecting frame away from the support frame is fastened to the annular structure. Multiple support frames are spaced apart along the length of the π-shaped cross-section connecting frame, improving the primary concave filter screen. The strength of the concave filter 13 is enhanced by the fact that adjacent π-shaped cross-sections of the connecting skeletons are connected to the filter screens through grooves on both sides, facilitating airflow filtration. The secondary convex filter 14 includes multiple convex skeletons, multiple support frames, and multiple filter screens. Each convex skeleton has a π-shaped cross-section, and both ends of the convex skeleton are connected to the support frame and the ring structure, respectively. To improve the strength of the secondary convex filter 14, multiple support frames are installed at intervals along the length of the convex skeleton. Adjacent convex skeletons are connected to the filter screens through grooves on both sides, facilitating airflow filtration. There is a distance between the overlapping parts of the primary concave filter 13 and the secondary convex filter 14.

[0046] The diverter 5 has a conical structure and is installed at the center of the bottom of the filter assembly 4. The apex of the diverter 5 is located inside the filter assembly 4 to facilitate the diverter 5's side to guide the airflow.

[0047] In this embodiment, the bottom of the filter assembly 4 is a circular ring structure, and the diverter 5 is conical. The bottom diameter of the diverter 5 matches the bottom inner diameter of the filter assembly 4, which facilitates the fastening of the diverter 5 to the bottom of the filter assembly 4. On the circular ring at the bottom of the filter assembly 4, from the inside out, it is connected to the first-stage concave filter screen 13 and the second-stage convex filter screen 14. The diverter 5 is located inside the first-stage concave filter screen 13, blocking and guiding the central passage of the first-stage concave filter screen 13. After the dusty and humid airflow enters the first-stage concave filter screen 13, the diverter 5 blocks and guides the dusty and humid airflow that has moved to the bottom. Under the action of the diverter 5, the dusty and humid airflow is dispersed in all directions along its streamlined conical surface and enters the surrounding funnel-shaped filter screen area. Before the dusty and humid airflow enters the double-layer filter area, the diverter 5 pre-divides the airflow and reconstructs the flow field, thereby improving the filtration effect of the filter assembly 4 on the airflow.

[0048] The main functions of setting the flow divider 5 into a conical shape are as follows: First, to block the central channel of the filter assembly 4, preventing airflow from concentrating in a small local cross-sectional area; second, to distribute the airflow flowing towards the center to the outer area, so that the airflow enters the filter area evenly; third, to increase the effective filtration area of ​​the airflow and the filter assembly 4, thereby improving the overall filtration efficiency and dust removal effect; and finally, to reduce the local high wind pressure and high airflow in the central area, effectively improving the overall flow field distribution and enhancing the stability of the dust removal fan operation.

[0049] The diverter 5 is set in a conical shape. The streamlined conical surface of the cone enables airflow diffusion. When the dust-laden, high-humidity airflow moves backward to the central area of ​​the filter assembly 4, the central passage is occupied by the diverter 5, and the dust-laden, high-humidity airflow cannot pass through along the central axis. Under the action of the diverter 5, it flows around the outer surface of the diverter. Under the combined influence of the rotational centrifugal force and the conical guiding effect of the diverter 5, the airflow diffuses from the center to the circumference and radial direction, and is guided into the surrounding primary concave filter screen 13 and secondary convex filter screen 14. The diverter 5 transforms the dust-laden, high-humidity airflow into a more uniform diffused airflow, achieving efficient and thorough filtration.

[0050] In one possible embodiment, the bottom of the filter assembly 4 is a circular plate, and the diverter 5 is a triangular pyramid. The base of the triangular pyramid is fastened to the center of the circular plate, so that the diverter 5 is installed at the center of the bottom of the filter assembly 4. The primary concave filter screen 13 is located outside the diverter 5 and is fastened to the circular plate. The secondary convex filter screen 14 is located outside the primary concave filter screen 13 and is fastened to the circular plate. The diverter 5 guides the airflow through the central passage of the primary concave filter screen 13, resulting in a dust-laden, high-humidity airflow. After entering the first-stage concave filter 13, the airflow moves backward along the first-stage concave filter 13. After the dust-laden and humid airflow comes into contact with the distributor 5, the distributor 5 blocks and guides the dust-laden and humid airflow that has moved to the bottom. Under the action of the distributor 5, the dust-laden and humid airflow moves in the opposite direction and enters the surrounding funnel-shaped filter area. The dust-laden and humid airflow is dispersed and flows out of the filter assembly 4 along the surrounding filter. The distributor 5 solves the problem of excessive airflow in the central area when the rotating airflow flows out of the filter assembly 4.

[0051] Furthermore, the diverter 5 can also be semi-circular or semi-elliptical. The diverter 5 gradually expands from top to bottom, which facilitates the diverter 5 to apply a force to the dusty and humid airflow at an angle upward. After the dusty and humid airflow comes into contact with the diverter 5, it moves at an angle upward and diffuses to the surroundings to be filtered by the first-stage concave filter screen 13 and the second-stage convex filter screen 14, thereby increasing the contact area between the dusty and humid airflow and the air-water separator.

[0052] The filter assembly 4 also includes a bottom connector 22, on one side of which a distributor 5, a primary concave filter screen 13 and a secondary convex filter screen 14 are connected sequentially from the center outwards. A gas-water separator is provided on the side of the bottom connector 22 away from the distributor 5.

[0053] In this embodiment, the bottom connector 22 is a circular plate. The diameter of the bottom connector 22 matches the bottom outer diameter of the secondary convex filter 14, which facilitates the fastening of the distributor 5, the primary concave filter 13, and the secondary convex filter 14 to the bottom connector 22. After connection, the central axis of the distributor 5, the central axis of the primary concave filter 13, and the central axis of the secondary convex filter 14 all coincide with the central axis of the bottom connector 22. The bottom central passage of the primary concave filter 13 and the secondary convex filter 14 is blocked by the bottom connector 22, which prevents the rotating airflow from entering the air-water separator along the central area of ​​the primary concave filter 13 or the secondary convex filter 14, thus avoiding excessive airflow in the central area of ​​the air-water separator and damage to the connection of the air-water separator, and extending the service life of the air-water separator.

[0054] In one possible embodiment, unlike the above embodiment, the bottom connector 22 is an annular structure. The bottom connector 22 is sealed to the inside of the diverter 5. The primary concave filter 13 and the secondary convex filter 14 are fastened to the annular plate of the bottom connector 22. The bottom of the primary concave filter 13 and the secondary convex filter 14 are blocked by the bottom connector 22 and the diverter 5 to prevent dusty and humid airflow from flowing out from the bottom of the primary concave filter 13 and the secondary convex filter 14.

[0055] The gas-water separator includes a first gas-water separator 6 and a second gas-water separator 7. Both the first gas-water separator 6 and the second gas-water separator 7 are connected to the inner wall of the fan housing 1. The second gas-water separator 7 is located on the side of the first gas-water separator 6 away from the filter assembly 4. The second gas-water separator 7 includes a plurality of baffles 18, which are arranged in series and respectively inserted into the inner wall of the fan housing 1.

[0056] In this embodiment, the inner wall of the fan housing 1 is provided with slots along the circumference, which facilitates the detachable connection of the first air-water separator 6 and the baffle plate 18 to the fan housing 1. According to the required air volume and environmental conditions, the number of stages of the baffle plate 18 of the second air-water separator 7 is adjusted. The central axis of the multi-stage detachable baffle plate 18 coincides with the central axis of the length direction of the fan housing 1. The dusty and humid airflow filtered by the first-stage concave filter screen 13 and the second-stage convex filter screen 14 enters the first air-water separator 6. The first air-water separator 6 separates the airflow into water. The separated droplets flow to the water collection tank under the action of gravity. The airflow continues to rotate and move along the first air-water separator 6 to the second air-water separator 7. The airflow is separated into water through the multi-stage baffle plate 18. The rotating airflow passes through the multi-stage rotating baffle plate 18. The droplets flow to the water collection tank under the action of gravity. The dry gas is discharged from the air outlet of the fan housing 1.

[0057] The first air-water separator 6 includes a support ring 15, a pre-separation baffle 16, and a support rod 17. The support ring 15 is connected to the inner wall of the fan housing 1. There are multiple pre-separation baffles 16 and support rods 17. The multiple support rods 17 are spaced apart along the circumference of the support ring 15. The two ends of each support rod 17 along the length direction are connected to the support ring 15 and the first-stage baffle 18, respectively. The multiple pre-separation baffles 16 are inclined and fastened to the support rods 17 along the circumference of the support ring 15 to increase the contact area between the airflow and the pre-separation baffles 16.

[0058] In this embodiment, the inner wall of the fan housing 1 is provided with a slot along the circumference. The support ring 15 is inserted into the slot of the fan housing 1 to stabilize the position of the first air-water separator 6. The first-stage baffle 18 is inserted into the slot of the support ring 15 away from the filter assembly 4. A plurality of support rods 17 are provided between the support ring 15 and the first-stage baffle 18. The plurality of support rods 17 are equally spaced along the circumference of the support ring 15. The two ends of each support rod 17 along the length direction are respectively threaded to the support ring 15 and the first-stage baffle 18. The two ends of each pre-separation baffle 16 along the length direction are respectively connected to two adjacent support rods 17. One end of the pre-separation baffle 16 along the length direction is connected to the end of the support rod 17 near the support ring 15, and the other end of the pre-separation baffle 16 along the length direction is connected to the end of the adjacent support rod 17 near the first-stage baffle 18, so that each pre-separation baffle 16 is arranged at an angle. The plate 16 is equipped with a wiper blade along its length. Multiple pre-separation baffles 16 are arranged in a ring inside the support ring 15. The dusty and humid airflow enters the first air-water separator 6 after being diffused and diverted by the filter assembly 4. The multiple pre-separation baffles 16 perform pre-separation of coarse droplets, reduce the load of subsequent stages, stabilize the inlet flow field, and improve the impact resistance under high wind speed conditions. Multiple pre-separation baffles 16 are arranged in a ring at the inlet end of the first air-water separator 6 for primary pre-dehydration of the high-humidity airflow. The pre-separation baffles 16 change the flow direction of the inlet airflow and form a local deflection, so that large-diameter droplets will preferentially impact the surface of the pre-separation baffles 16 and be intercepted by inertia, thereby reducing the droplet load of the subsequent separation stage and improving the uniformity of the inlet flow field. The inclined arrangement of the pre-separation baffles 16 can reduce their resistance to the airflow, increase the contact area between the pre-separation baffles 16 and the rotating airflow, and improve the air-water separation efficiency.

[0059] In one possible embodiment, the support rod 17 is provided with a plurality of first threaded holes spaced apart along its length, and the pre-separation baffle 16 is provided with second threaded holes on its sidewall along its length. The second threaded holes are located at both ends of the pre-separation baffle 16 along its length, and the diameter of the second threaded holes matches the diameter of the first threaded holes. The pre-separation baffle 16 and the support rod 17 are connected by bolt threads. By adjusting the connection between the pre-separation baffle 16 and the first threaded holes at different heights on the support rod 17, the angle of the pre-separation baffle 16 can be adjusted so that it faces the rotating airflow, thereby maximizing the contact area between the rotating airflow and the pre-separation baffle 16 and improving the flow guidance and air-water separation efficiency of the pre-separation baffle 16.

[0060] Furthermore, the pre-separation baffle 16 has an arc on the side facing the airflow, and the pre-separation baffle 16 is inclined downward from the end near the support rod 17, so that the cross section of the pre-separation baffle 16 is triangular, and a wiper is provided at the end of the pre-separation baffle 16 away from the support rod 17.

[0061] The primary concave filter screen 13 is provided with a guide groove to facilitate the water flow to the guide pipe 19. The guide pipe 19 is connected to the water collection tank 20, which is located on the bottom outer side of the fan housing 1.

[0062] In this embodiment, the first-stage concave filter screen 13 is provided with a π-shaped cross-section connecting frame along its length. The lower end of the π-shaped cross-section connecting frame has a guide channel structure. After air-water separation, the dust-laden droplets flow along the guide channel to the guide pipe 19, and are then sent to the water collection tank 20 through the guide pipe 19.

[0063] A dust sensor 21 is installed at the air outlet of the fan housing 1 to facilitate the detection of the air quality after treatment.

[0064] In this embodiment, the number of baffles 18 needs to be increased or decreased based on the air quality detected by the dust sensor 21, so as to ensure that the air delivered by the dust removal fan meets the quality requirements.

[0065] The fan housing 1 has a cylindrical structure. The fan housing 1 has an air inlet and an air outlet at both ends. A motor bracket and a motor protective cover are provided near the air inlet of the fan housing 1. The motor bracket is fastened to the inner wall of the fan housing 1. The motor protective cover is fastened to the inside of the fan housing 1 through the motor bracket. A fan cover is provided in the middle of the fan housing 1. A handle is provided on the fan cover for easy opening and closing of the fan cover.

[0066] When wet dust removal is required in the mine, the wet dust removal fan is placed at the location to be dusted. The explosion-proof motor 11 is started, driving the swirl vanes 10 to rotate synchronously, generating a rotating airflow. The dust-laden airflow in the mine is drawn into the air inlet of the fan casing 1 under the action of pressure difference. The dust-laden airflow undergoes its first filtration through the protective net 2. Simultaneously with starting the explosion-proof motor 11, the atomizing nozzle 8 is activated. The atomizing nozzle 8 sprays water mist, which mixes thoroughly with the dust-laden airflow to form a high-humidity dust-laden airflow. Under the action of the rotating airflow generated by the swirl vanes 10, the high-humidity dust-laden airflow moves forward and flows through the first-stage concave filter 13 for a second filtration. The filtered droplets are guided by the guide groove at the lower end of the π-shaped cross-section connecting frame to the first drain outlet of the guide pipe 19. The high-humidity dust-laden airflow continues to pass through the second-stage convex filter 14 for a third filtration. The filtered droplets are then guided by the guide groove at the lower end of the π-shaped cross-section connecting frame to the guide pipe. The second drain outlet of 19, the droplets in the guide pipe 19 flow to the water collection tank 20, the dust-laden and humid airflow continues to rotate and move backward in the first-stage concave filter screen 13, and reaches the distributor 5. Under the action of the distributor 5, the dust-laden and humid airflow spreads out in all directions, so that the dust-laden and humid airflow flows out along the side walls of the first-stage concave filter screen 13 and the second-stage convex filter screen 14, and reaches the first air-water separator 6. The dust-laden and humid airflow first moves briefly on the pre-separation baffle 16, and when it flows to the scraper, it turns in the opposite direction, realizing air-water separation. The droplets flow into the water collection tank 20 under the action of gravity. The dust-laden airflow continues to rotate and move, and after multiple rotations and adhesions at the second air-water separator 7, the droplets flow into the water collection tank 20 under the action of gravity. The liquid in the water collection tank 20 is discharged from the bottom. After the dust-laden airflow passes through multiple stages of air-water separation, it obtains dry air. The dry air is discharged from the air outlet of the fan casing 1, realizing the filtration and purification of dust.

[0067] The above description is merely a preferred embodiment of the present invention and does not constitute any limitation on the present invention. Any simple modifications, alterations, or equivalent structural transformations made to the above embodiments based on the technical essence of the present invention shall still fall within the protection scope of the present invention.

Claims

1. A multi-stage filtration and purification wet dust collector for mining, comprising a fan housing (1), characterized in that: A protective net (2) is provided at the inlet of the fan housing (1). A power mechanism is provided on the rear side of the protective net (2). A spray system (3) is provided between the power mechanism and the protective net (2). A filter assembly (4) is provided on the side of the power mechanism away from the spray system (3). The filter assembly (4) has a funnel-shaped structure. A diverter (5) is provided on the inner side of the end of the filter assembly (4) away from the power mechanism. The bottom of the diverter (5) is tightly connected to the bottom support frame of the filter assembly (4). An air-water separator is provided on the side of the filter assembly (4) away from the spray system (3). The air-water separator is detachably connected to the inner wall of the fan housing (1). The central axis of the air-water separator, the diverter (5) and the filter assembly (4) coincides with the central axis of the fan housing (1).

2. A multi-stage filtration and purification wet dust collector for mining as described in claim 1, characterized in that: The spray system (3) includes atomizing nozzles (8) and water inlet pipes (9). There are multiple atomizing nozzles (8), which are equally spaced along the inner wall of the fan housing (1). Each atomizing nozzle (8) is connected to the water inlet pipe (9).

3. A mining multi-stage filtration and purification wet dust collector fan according to claim 1, characterized in that: The power mechanism includes a swirl blade (10) and an explosion-proof motor (11). The explosion-proof motor (11) is installed in the motor protective cover (12) inside the fan housing (1). The output shaft of the explosion-proof motor (11) is connected to the swirl blade (10) to facilitate the rotation of the swirl blade (10).

4. A multi-stage filtration and purification wet dust collector for mining as described in claim 1, characterized in that: The filter assembly (4) includes a primary concave filter screen (13) and a secondary convex filter screen (14). The primary concave filter screen (13) is embedded in the secondary convex filter screen (14). The π-shaped cross-section connecting frame at both ends of the primary concave filter screen (13) is tenon-and-mortise connected to the fan housing (1) so that the filter assembly (4) is fastened to the fan housing (1).

5. A mining multi-stage filtration and purification wet dust collector fan according to claim 1, characterized in that: The diverter (5) has a conical structure and is installed at the center of the bottom of the filter assembly (4). The apex of the diverter (5) is located inside the filter assembly (4) to facilitate the diverter (5) to guide the airflow.

6. A mining multi-stage filtration and purification wet dust collector fan according to claim 4, characterized in that: The filter assembly (4) also includes a bottom connector (22), on one side of which a distributor (5), a first-stage concave filter screen (13) and a second-stage convex filter screen (14) are connected sequentially from the center outward. A gas-water separator is provided on the side of the bottom connector (22) away from the distributor (5).

7. A multi-stage filtration and purification wet dust collector for mining as described in claim 1, characterized in that: The gas-water separator includes a first gas-water separator (6) and a second gas-water separator (7). Both the first gas-water separator (6) and the second gas-water separator (7) are connected to the inner wall of the fan housing (1). The second gas-water separator (7) is located on the side of the first gas-water separator (6) away from the filter assembly (4). The second gas-water separator (7) includes multiple baffles (18). The multiple baffles (18) are arranged in series and are respectively inserted into the inner wall of the fan housing (1).

8. A mining multi-stage filtration and purification wet dust collector fan according to claim 7, characterized in that: The first gas-water separator (6) includes a support ring (15), a pre-separation baffle (16) and a support rod (17). The support ring (15) is connected to the inner wall of the fan housing (1). There are multiple pre-separation baffles (16) and support rods (17). Multiple support rods (17) are spaced apart along the circumference of the support ring (15). Each support rod (17) is connected to the support ring (15) and the first-stage baffle (18) at both ends along its length. Multiple pre-separation baffles (16) are inclined and fastened to the support rods (17) along the circumference of the support ring (15) to increase the contact area between the airflow and the pre-separation baffles (16).

9. A mining multi-stage filtration and purification wet dust collector fan according to claim 4, characterized in that: The first-stage concave filter screen (13) is provided with a guide groove to facilitate the water flow to the guide pipe (19). The guide pipe (19) is connected to the water collection tank (20), which is located on the bottom outer side of the fan housing (1).

10. A mining multi-stage filtration and purification wet dust collector fan according to claim 1, characterized in that: A dust sensor (21) is installed at the air outlet of the fan housing (1) to facilitate the detection of the air quality after treatment.

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