Gas injection self-excitation type water rotation dust remover

Abstract

The invention belongs to the technical field of coal mine dust collection and falling tools, and provides a gas injection self-excitation type water rotation dust remover, which comprises a negative pressure suction assembly, an air flow pipe fitting, a gas inlet end of the air flow pipe fitting is provided with a plurality of first air injectors, and the plurality of first air injectors are used for generating negative pressure at the inlet end of the air flow pipe fitting; the dust removal assembly comprises an expansion cavity, a water rotational flow cavity and a water storage cavity, the air outlet end of the air flowing pipe fitting communicates with the side wall of the expansion cavity, an air opening communicating with the water rotational flow cavity is formed in the side wall, away from the air flowing pipe fitting, of the expansion cavity, and water in the water storage cavity enters the expansion cavity through an opening formed in the bottom of the expansion cavity; dust-containing air is mixed with water through the air port and enters the water rotational flow cavity, tiny dust and water flow back into the water storage cavity through the bottom of the water rotational flow cavity, clean air is discharged from an outlet in the top of the water rotational flow cavity, and the top of the water rotational flow cavity is communicated with an air exhaust mechanism. Compressed air is used as power, and dust removal work of dust-containing air can be achieved through negative pressure.

Description

Technical Field

[0001] This invention belongs to the technical field of dust collection and suppression equipment for coal mines, and particularly relates to a gas ejector self-excited water cyclone dust collector. Background Technology

[0002] Coal mining and tunnel excavation generate large amounts of dust, which not only poses a significant health risk to workers but also poses a high risk of dust explosions. Therefore, eliminating dust hazards is a crucial factor in ensuring safe coal mine production. Furthermore, the release of large amounts of methane gas during coal mining necessitates considering the impact of methane gas when selecting dust removal equipment.

[0003] Existing dust control technologies include coal seam water injection and spray dust suppression. Coal seam water injection involves drilling holes in the coal seam before mining and using a dedicated water supply system to inject water into the coal seam. This reduces the compressive strength of the coal and wets the coal seam, achieving dust suppression during mining. However, because a large amount of water mixes into the mined coal, it not only reduces product quality but also causes equipment to operate in a humid environment for extended periods, making it prone to damage and increasing costs. Spray dust suppression involves atomizing water or other liquids into fine droplets, allowing them to contact and capture airborne dust particles, thereby reducing the concentration of suspended dust in the air. The spray medium (such as activated magnetized water) is atomized through specific spraying equipment, forming a large number of droplets. These droplets collide and condense with dust particles, increasing the weight of the dust and causing it to settle. However, the dust suppression efficiency is insufficient for coal mining requirements, and nozzle clogging, nozzle wear, and water leakage are common problems during operation.

[0004] Mining dust collectors are one of the effective means of controlling dust in coal mines at present. Their main principle is to draw dust-laden air from the mine shaft into the equipment through high-negative-pressure airflow for dust removal, or to suppress dust by spraying high-pressure water mist, thereby purifying the mine air and reducing its dust content. Currently, dust collectors used in mines in my country are mainly divided into two categories: wet dust collectors and dry dust collectors. Dry dust collectors consist of a housing, a soot blowing system, a dust collection device, and filter cartridges. Wet dust collectors consist of a housing, nozzles, a filter screen, and a dewatering plate. Mining dust collectors have good dust removal efficiency, but they have disadvantages such as large size, inconvenience in movement, and high noise levels. The power of the dust collector is provided by an electric motor, requiring explosion-proof measures. Summary of the Invention

[0005] The purpose of this invention is to provide a gas ejector self-excited water cyclone dust collector to solve the above problems and achieve the goal of safe, reliable and efficient dust removal without the need for a motor.

[0006] To achieve the above objectives, the present invention provides the following solution: a gas ejector self-excited hydrocyclone dust collector, comprising: A negative pressure suction assembly includes an air flow pipe, wherein the air inlet end of the air flow pipe is provided with a plurality of first air ejectors connected to a high-pressure air supply device, and the plurality of first air ejectors are used to eject air into the air flow pipe to generate negative pressure at the inlet end of the air flow pipe. The dust removal assembly includes an expansion chamber, a water vortex chamber, and a water storage chamber. The air outlet of the air flow pipe is connected to the side wall of the expansion chamber. An air inlet connected to the water vortex chamber is provided on the side wall of the expansion chamber away from the air flow pipe. Water in the water storage chamber enters the expansion chamber through an opening at the bottom of the expansion chamber. Dust-laden air mixes with water through the air inlet and enters the water vortex chamber. During the vortex process, the dust and water mix and flow back to the water storage chamber through the bottom of the water vortex chamber. Clean air is discharged from the top outlet of the water vortex chamber. An air extraction mechanism is connected to the top of the water vortex chamber, and the air extraction mechanism includes a second air ejector.

[0007] Preferably, the negative pressure suction assembly includes a dust collector, and the air flow pipe is disposed inside the dust collector. One end of the dust collector is connected to the air inlet end of the air flow pipe through an air inlet, and the other end of the dust collector is connected to the air outlet end of the air flow pipe through a dust-laden air outlet.

[0008] Preferably, the airflow fitting includes a venturi tube, wherein the inner diameter of the inlet end of the venturi tube is larger than the inner diameter of the outlet end.

[0009] Preferably, a plurality of the first air ejectors are equally spaced on the inner wall of the air inlet end of the venturi tube, the air outlet end of the first air ejector faces the air outlet end of the venturi tube, and the air inlet end of the first air ejector is connected to the air inlet.

[0010] Preferably, the dust removal assembly includes a dust removal box fixedly connected to the dust collector, a through hole communicating with the dust-laden air outlet is provided on the side wall of the dust removal box, the expansion chamber and the water cyclone chamber are disposed inside the dust removal box, the water storage chamber is disposed at the bottom of the dust removal box, and the air extraction mechanism is disposed at the top of the dust removal box.

[0011] Preferably, the expansion cavity includes a dust baffle plate vertically disposed inside the dust collector box. The top and two sides of the dust baffle plate are fixedly connected to the inner top and two opposite side walls of the dust collector box, respectively. The through hole is disposed facing the dust baffle plate. One end of an arc-shaped plate is fixedly connected to the bottom of the dust baffle plate. The two sides of the arc-shaped plate are fixedly connected to the two opposite side walls of the dust collector box, respectively. The other end of the arc-shaped plate is disposed away from the through hole. The dust collector is also provided with a first water-blocking arc plate, which is located below the arc plate. The two sides of the first water-blocking arc plate are fixedly connected to the two opposite side walls of the dust collector. The air vent is formed between the top of the first water-blocking arc plate and the bottom of the arc plate. The first water-blocking arc plate is located below the water surface in the water storage chamber.

[0012] Preferably, a second baffle plate is provided inside the dust collection box. An inclined plate is fixedly connected to the top of the second baffle plate. The two sides of the second baffle plate and the two sides of the inclined plate are respectively fixedly connected to the two opposite side walls of the dust collection box. The inclined plate and the second baffle plate are located on the side of the dust baffle plate away from the through hole. The inclined plate is inclined towards the dust baffle plate. The bottom of the second baffle plate is below the water surface in the water storage cavity. A third baffle plate is horizontally arranged inside the dust collector. The two sides of the third baffle plate are fixedly connected to the two opposite side walls of the dust collector. One end of the third baffle plate is fixedly connected to the side wall of the dust baffle plate away from the through hole. A gap is provided between the bottom of the third baffle plate and the top of the inclined plate. The dust baffle plate, the inclined plate, the second baffle plate and the third baffle plate form the water vortex cavity.

[0013] Preferably, the air extraction mechanism includes a second air ejector fixedly connected to the top of the dust collector, the second air ejector being disposed away from the dust baffle, and the second air ejector being used to extract air from the dust collector.

[0014] Preferably, the bottom of the dust collector is provided with a drain outlet, which is connected to the water storage chamber, and a valve is connected to the drain outlet.

[0015] Preferably, the high-pressure air inlets of the first air ejector and the second air ejector are respectively connected to both ends of the compressed air pipeline, the middle part of the compressed air pipeline is connected to a high-pressure air supply device, and a first compressed air valve and a second compressed air valve are connected to the compressed air pipeline. The first compressed air valve and the second compressed air valve are respectively located close to the first air ejector and the second air ejector.

[0016] Compared with the prior art, the present invention has the following advantages and technical effects: 1. This invention uses an air ejector, which is powered by compressed air during operation, and has no motor or electrical components, making it suitable for use in high-gas mines.

[0017] 2. This invention combines negative pressure suction and water cyclone collection to achieve efficient and graded removal of dust particles of different sizes.

[0018] 3. The present invention has a compact structure and is suitable for working environments with limited space and high gas risk, such as coal mining faces. Attached Figure Description

[0019] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0020] Figure 1 This is a schematic diagram of the dust collector of the present invention; Figure 2 This is a cross-sectional schematic diagram of the dust collector of the present invention; Figure 3 This is a cross-sectional schematic diagram of the dust collection box of the present invention; Figure 4 This is a diagram showing the flow path of dust-laden air within the dust collector according to the present invention; The components are as follows: 1. Dust collector; 2. Dust collection box; 3. Air inlet; 4. First air ejector; 41. Outer cylinder; 42. Inner cylinder; 43. Annular cavity; 5. Compressed air pipeline; 6. First compressed air valve; 7. Venturi tube; 8. Dust-laden air outlet; 9. First metal shell; 10. Dust baffle; 101. Arc plate; 11. First water baffle arc plate; 12. Second water baffle; 121. Inclined plate; 13. Third water baffle; 131. Arc guide plate; 14. Second air ejector; 15. Second compressed air valve; 16. Drain outlet; 17. Second metal shell; 18. Through hole; 19. Air port. Detailed Implementation

[0021] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0022] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0023] Reference Figures 1-4 This invention provides a gas ejector self-excited hydrocyclone dust collector, comprising: The negative pressure suction assembly includes an air flow pipe, and the air inlet end of the air flow pipe is provided with a plurality of first air ejectors 4 connected to a high-pressure air supply device. The plurality of first air ejectors 4 are used to eject air into the air flow pipe to generate negative pressure at the inlet end of the air flow pipe. The dust removal assembly includes an expansion chamber, a water vortex chamber, and a water storage chamber. The air outlet of the air flow pipe is connected to the side wall of the expansion chamber. An air inlet 19 connected to the water vortex chamber is provided on the side wall of the expansion chamber away from the air flow pipe. Water in the water storage chamber enters the expansion chamber through an opening at the bottom of the expansion chamber. Dust-laden air mixes with water through the air inlet 19 and enters the water vortex chamber. Dust and water mix during the vortex process and flow back to the water storage chamber through the bottom of the water vortex chamber. Clean air is discharged from the top outlet of the water vortex chamber. An air extraction mechanism is connected to the top of the water vortex chamber. The air extraction mechanism includes a second air ejector 14.

[0024] The main function of the airflow pipe is to restrict the flow direction of dust-laden air and guide it into the expansion chamber. The main function of the first air ejector is to use compressed air to generate a high-speed jet, creating a negative pressure zone at the inlet of the airflow pipe to achieve unpowered suction of the dust-laden air. The main function of the expansion chamber is to cause a sudden drop in the flow velocity and change the flow direction of the dust-laden air, using inertia to cause large dust particles to collide with the expansion chamber wall and achieve preliminary separation. The main function of the air inlet is to guide the pre-treated air from the expansion chamber into the water vortex chamber, and in the process, drive the water flow to form an air-water mixing interface. The main function of the water vortex chamber is to make the mixed air and water form a rotating water flow, so that the dust-laden air and water can fully contact and mix, achieving the capture and dissolution of fine dust. The main function of the water storage chamber is to store dust removal water, collect settled dust and dust-laden wastewater, and provide a continuous water supply. The main function of the second air ejector 14 is to create a continuous negative pressure at the top of the water vortex chamber, sucking up the mixed air and water and promoting the discharge of purified air. Overall, this invention uses compressed air as power, eliminating the need for motors and electrical components. It achieves dust removal from dusty air through negative pressure, resulting in good dust removal performance and making it suitable for high-gas environments.

[0025] Further optimization of the scheme: the negative pressure suction component includes a dust collector 1, and an air flow pipe is installed inside the dust collector 1. One end of the dust collector 1 is connected to the air inlet end of the air flow pipe through an air inlet 3, and the other end of the dust collector 1 is connected to the air outlet end of the air flow pipe through a dust-laden air outlet 8.

[0026] The design was further optimized so that the dust collector 1 was welded together from the first metal outer shell 9.

[0027] The design was further optimized, and the airflow fittings include a venturi tube 7, in which the inner diameter of the air inlet end of the venturi tube 7 is larger than the inner diameter of the air outlet end.

[0028] like Figure 1 and Figure 2 As shown, the Venturi tube 7 is fixedly connected inside the dust collector 1, and the large-diameter end and the small-diameter end of the Venturi tube 7 are respectively snapped into the air inlet 3 and the dust-laden air outlet 8.

[0029] The main function of the Venturi tube 7 is to use its own structure to further increase the flow velocity of the dust-laden air as it flows toward the dust-laden air outlet 8.

[0030] In a further optimized design, several first air ejectors 4 are evenly distributed on the inner wall of the air inlet end of the venturi tube 7, with the air outlet end of the first air ejector 4 facing the air outlet end of the venturi tube 7, and the air inlet end of the first air ejector 4 connected to the air inlet 3.

[0031] Further optimization of the scheme: the first air ejector 4 includes an outer cylinder 41, an inner cylinder 42 is fixedly connected inside the outer cylinder 41, the inner cylinder 42 is open at both ends, and an annular cavity 43 is formed between the outer cylinder 41 and the inner cylinder 42. An annular air outlet is provided at one end of the annular cavity 43 near the dust-laden air outlet 8, and the annular cavity 43 is connected to a high-pressure air supply device.

[0032] like Figure 1 and Figure 2 As shown, the high-pressure air supply equipment injects compressed air into the annular cavity 43 and ejects it at a high velocity from the annular outlet. Due to the wall adhesion effect on the inner surface of the inner cylinder 42, a high-speed airflow is formed towards the dust-laden air outlet 8, drawing the dust-laden air into the Venturi tube 7. Simultaneously, during the flow of the high-speed airflow, a low-pressure zone is generated behind it, i.e., in the large-diameter end of the Venturi tube 7, drawing a large amount of surrounding dust-laden air into the Venturi tube 7 through the air inlet 3. The velocity of the dust-laden air further increases in the Venturi tube 7 and finally enters the expansion cavity from the dust-laden air outlet 8.

[0033] Further optimization of the scheme: the dust removal component includes a dust removal box 2 fixedly connected to the dust collector 1. The side wall of the dust removal box 2 is provided with a through hole 18 communicating with the dust-laden air outlet 8. The expansion chamber and the water cyclone chamber are located inside the dust removal box 2. The water storage chamber is located at the bottom of the dust removal box 2. The air extraction mechanism is located at the top of the dust removal box 2.

[0034] The design was further optimized so that the dust collection box 2 was assembled from the second metal outer shell 17.

[0035] like Figure 3 and Figure 4 As shown, fill the dust collector 2 with water to a suitable height, ensuring that the water level is higher than the bottom of the expansion chamber and the bottom of the water vortex chamber.

[0036] Further optimization of the scheme: the expansion cavity includes a dust baffle 10 vertically installed in the dust collector 2. The top and two sides of the dust baffle 10 are fixedly connected to the top inner side and two opposite side walls of the dust collector 2, respectively. The through hole 18 is set towards the dust baffle 10. One end of the arc plate 101 is fixedly connected to the bottom of the dust baffle 10. The two sides of the arc plate 101 are fixedly connected to the two opposite side walls of the dust collector 2, respectively. The other end of the arc plate 101 is set away from the through hole 18. The dust collector 2 is also equipped with a first water-blocking arc plate 11. The first water-blocking arc plate 11 is located below the arc plate 101, and the two sides of the first water-blocking arc plate 11 are fixedly connected to the two opposite side walls of the dust collector 2 respectively. An air vent 19 is formed between the top of the first water-blocking arc plate 11 and the bottom of the arc plate 101. The first water-blocking arc plate 11 is located below the water surface in the water storage chamber.

[0037] like Figure 3 As shown, in this embodiment, the arc plate 101 and the first water-blocking arc plate 11 have the same shape, and the bottom of the arc plate 101 and the top of the first water-blocking arc plate 11 are close to each other and extend backward along the air flow direction to form an air vent 19, which is conducive to the smooth flow of air. A gap is provided between the bottom of the first water-blocking arc plate 11 and the inner bottom of the dust collection box 2.

[0038] like Figure 3 and Figure 4 As shown, after the dust-laden air enters the expansion chamber through the through hole 18, the space suddenly increases and the flow rate of the dust-laden gas decreases. Large dust particles collide with the dust baffle 10 and fall into the water, achieving the initial removal of large dust particles. Afterward, the air containing fine dust passes through the air inlet 19 and enters the water vortex chamber along with the water drawn in by the pressure difference.

[0039] In a further optimized design, a second baffle plate 12 is installed inside the dust collector 2. An inclined plate 121 is fixedly connected to the top of the second baffle plate 12. The two sides of the second baffle plate 12 and the two sides of the inclined plate 121 are respectively fixedly connected to the two opposite side walls of the dust collector 2. The inclined plate 121 and the second baffle plate 12 are located on the side of the dust baffle plate 10 away from the through hole 18. The inclined plate 121 is inclined towards the dust baffle plate 10. The bottom of the second baffle plate 12 is below the water surface in the water storage chamber. A third baffle plate 13 is horizontally arranged inside the dust collector 2. The two sides of the third baffle plate 13 are fixedly connected to the two opposite side walls of the dust collector 2, respectively. One end of the third baffle plate 13 is fixedly connected to the side wall of the dust baffle plate 10 away from the through hole 18. A gap is provided between the bottom of the third baffle plate 13 and the top of the inclined plate 121. The dust baffle plate 10, the inclined plate 121, the second baffle plate 12 and the third baffle plate 13 form a water vortex cavity.

[0040] In a further optimized design, the end of the third water baffle 13 furthest from the dust baffle 10 is fixedly connected to one end of the arc-shaped guide plate 131, and the other end of the arc-shaped guide plate 131 bends downward to guide the air.

[0041] like Figure 3 As shown, the mixed water vapor passes through the air inlet 19, contacts the inclined plate 121, and flows upward and backward along the inclined plate 121. After impacting the third baffle plate 13, it flows downward along the dust baffle plate 10 and the arc-shaped plate 101, contacting the subsequently entering mixed water vapor, thus forming a water vortex. During the vortex process, the dust and water are in contact for a long time and are fully mixed. Finally, under the action of gravity, the dust flows back directly or along the second baffle plate 12 to the water at the bottom of the dust collector 2. Meanwhile, the air flows out along the arc-shaped guide plate 131 under the action of the suction mechanism, forming clean air, which is then discharged through the suction mechanism.

[0042] The scheme is further optimized. The air extraction mechanism includes a second air ejector 14 fixedly connected to the top of the dust collector 2. The second air ejector 14 is located away from the dust baffle 10 and is used to extract air from the dust collector 2.

[0043] Further optimize the plan, such as Figure 3 As shown, in this embodiment, the second air ejector 14 has the same structure as the first air ejector 4. Compressed air is discharged upward through the annular outlet of the second air ejector 14, forming an airflow from the dust collector 2 to the outside within the inner cylinder 42, drawing clean air out.

[0044] To further optimize the design, a drain outlet 16 is provided at the bottom of the dust collector 2. The drain outlet 16 is connected to the water storage chamber, and a valve is connected to the drain outlet 16.

[0045] like Figure 3 As shown, the main function of the drain outlet 16 is to facilitate the discharge of sewage from the dust collection box 2.

[0046] In a further optimized design, the high-pressure air inlets of the first air ejector 4 and the second air ejector 14 are connected to both ends of the compressed air pipeline 5, respectively. The middle part of the compressed air pipeline 5 is connected to a high-pressure air supply device. The first compressed air valve 6 and the second compressed air valve 15 are connected to the compressed air pipeline 5. The first compressed air valve 6 and the second compressed air valve 15 are respectively located close to the first air ejector 4 and the second air ejector 14.

[0047] like Figure 1 As shown, the high-pressure air supply equipment supplies compressed air into the compressed air pipeline 5. By controlling the opening of the first compressed air valve 6 and the second compressed air valve 15, the amount of compressed air flowing to the first air ejector 4 and the second air ejector 14 can be controlled, thereby adjusting the working state of the dust collector.

[0048] The working process of this embodiment is as follows: In use, open the first compressed air valve 6 and the second compressed air valve 15, allowing compressed air to simultaneously enter the first air ejector 4 and the second air ejector 14. The first air ejector 4 creates a negative pressure at the inlet of the venturi tube 7, drawing in dust-laden air. After being accelerated by the venturi tube 7, the dust-laden air enters the expansion chamber of the dust collector 2 through the through-hole 18, where large dust particles collide with the dust baffle 10 and fall into the water. Air containing fine dust enters the water vortex chamber through the air inlet 19. Under the negative pressure created by the second air ejector 14, water is drawn in and forms a rotating water flow, achieving thorough mixing of air and water with the fine dust collection. The purified air is discharged through the second air ejector 14, the dust-laden water flows back to the water storage chamber, and wastewater can be periodically discharged through the drain outlet 16.

[0049] This invention has a simple structure, requires no electricity, is suitable for flammable and explosive environments such as coal mines, and has good dust removal effect and safety.

[0050] In the description of this invention, it should be understood that the terms "longitudinal", "lateral", "up", "down", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this invention, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this invention.

[0051] The embodiments described above are merely preferred embodiments of the present invention and are not intended to limit the scope of the present invention. Various modifications and improvements made by those skilled in the art to the technical solutions of the present invention without departing from the spirit of the present invention should fall within the protection scope defined by the claims of the present invention.

Claims

1. A gas-inducing self-excited water cyclone dust collector, characterized by comprising: The application relates to a dust removal device, which comprises the following components: a negative pressure suction assembly, which comprises an air flow pipe, and the air inlet end of the air flow pipe is provided with a plurality of first air ejectors (4) communicated with a high-pressure air supply device, and the plurality of first air ejectors (4) are used for ejecting air into the air flow pipe to generate negative pressure at the air inlet end of the air flow pipe; a dust removal assembly, which comprises an expansion cavity, a water cyclone cavity and a water storage cavity, the air outlet end of the air flow pipe is communicated with the side wall of the expansion cavity, the side wall of the expansion cavity away from the air flow pipe is provided with an air port (19) communicated with the water cyclone cavity, water in the water storage cavity enters the expansion cavity through an opening arranged at the bottom of the expansion cavity, dust-containing air enters the water cyclone cavity by being mixed with water through the air port (19), micro dust is mixed with water in the cyclone process and returns to the water storage cavity through the bottom of the water cyclone cavity, and clean air is discharged from the top outlet of the water cyclone cavity, and the top of the water cyclone cavity is communicated with an air extraction mechanism, and the air extraction mechanism comprises a second air ejector (14).

2. A gas entrainment self-sustained water cyclone dust collector according to claim 1, characterized in that: The negative pressure suction assembly comprises a dust collector (1), the air flow pipe is arranged in the dust collector (1), one end of the dust collector (1) is communicated with the air inlet end of the air flow pipe through an air inlet (3), and the other end of the dust collector (1) is communicated with the air outlet end of the air flow pipe through a dust-containing air outlet (8).

3. A gas entrainment self-sustained water cyclone dust collector according to claim 2, characterized in that: The air flow pipe comprises a Venturi tube (7), and the inner diameter of the air inlet end of the Venturi tube (7) is larger than the inner diameter of the air outlet end.

4. A gas entrainment self-sustained water cyclone dust collector according to claim 3, characterized in that: The plurality of first air ejectors (4) are equidistantly distributed on the inner wall of the air inlet end of the Venturi tube (7), the air outlet end of the first air ejector (4) faces the air outlet end of the Venturi tube (7), and the air inlet end of the first air ejector (4) is communicated with the air inlet (3).

5. A gas entrainment self-sustained water cyclone dust collector according to claim 2, characterized in that: The dust removal assembly comprises a dust removal box (2) fixedly connected with the dust collector (1), a through hole (18) communicated with the dust-containing air outlet (8) is arranged on the side wall of the dust removal box (2), the expansion cavity and the water cyclone cavity are arranged in the dust removal box (2), the water storage cavity is arranged at the bottom of the dust removal box (2), and the air extraction mechanism is arranged at the top of the dust removal box (2).

6. A gas entrainment self-sustained water cyclone dust collector according to claim 5, characterized in that: The expansion cavity comprises a dust blocking plate (10) vertically arranged in the dust removal box (2), the top and two sides of the dust blocking plate (10) are fixedly connected with the inner top and two opposite side walls of the dust removal box (2) respectively, the through hole (18) faces the dust blocking plate (10), one end of an arc-shaped plate (101) fixedly connected with the bottom of the dust blocking plate (10) is arranged, two sides of the arc-shaped plate (101) are fixedly connected with two opposite side walls of the dust removal box (2) respectively, and the other end of the arc-shaped plate (101) is arranged away from the through hole (18). The dust removal box (2) is provided with a first water baffle (11), the first water baffle (11) is located below the arc-shaped plate (101), and the two sides of the first water baffle (11) are fixedly connected with the two opposite side walls of the dust removal box (2); the top of the first water baffle (11) and the bottom of the arc-shaped plate (101) form the air port (19), and the first water baffle (11) is located below the water surface in the water storage cavity.

7. A gas entrainment self-sustained water cyclone dust separator according to claim 6, characterized in that: The dust removal box (2) is provided with a second water baffle (12), the top of the second water baffle (12) is fixedly connected with an inclined plate (121), the two sides of the second water baffle (12) and the two sides of the inclined plate (121) are fixedly connected with the two opposite side walls of the dust removal box (2), the inclined plate (121) and the second water baffle (12) are arranged on the side of the dust baffle (10) away from the through hole (18), the inclined plate (121) is inclined towards the direction of the dust baffle (10), and the bottom of the second water baffle (12) is located below the water surface in the water storage cavity. The dust removal box (2) is provided with a third water baffle (13) arranged horizontally, the two sides of the third water baffle (13) are fixedly connected with the two opposite side walls of the dust removal box (2), one end of the third water baffle (13) is fixedly connected with the side wall of the dust baffle (10) away from the through hole (18), and the bottom of the third water baffle (13) is provided with a gap from the top of the inclined plate (121); the dust baffle (10), the inclined plate (121), the second water baffle (12) and the third water baffle (13) form the water cyclone cavity.

8. A gas entrainment self-sustaining water cyclone dust separator according to claim 6 wherein: The air extraction mechanism comprises the second air ejector (14) fixedly connected to the top of the dust removal box (2), and the second air ejector (14) is arranged away from the dust baffle (10) and used for extracting air in the dust removal box (2).

9. A gas entrainment self-sustaining water cyclone dust separator according to claim 6 wherein: The bottom of the dust removal box (2) is provided with a drain port (16) in communication with the water storage cavity, and the drain port (16) is provided with a valve.

10. A gas entrainment self-sustaining water cyclone dust separator according to claim 8 wherein: The high-pressure air inlets of the first air ejector (4) and the second air ejector (14) are in communication with two ends of a compressed air pipeline (5), the middle part of the compressed air pipeline (5) is in communication with a high-pressure air supply device through a pipeline, the compressed air pipeline (5) is provided with a first compressed air valve (6) and a second compressed air valve (15), and the first compressed air valve (6) and the second compressed air valve (15) are arranged close to the first air ejector (4) and the second air ejector (14) respectively.

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