Wet type passive dust removal device

Abstract

The invention discloses a wet-type passive dust removal device which comprises a shell, an anti-explosion electric control box, a main water tank, an auxiliary water tank, a fan, a dust air inlet channel, two water mist dust removal sputtering airflow channels and a water mist separation plate, the interior of the shell is divided into a front cavity and a rear cavity which are independent through a vertical partition plate, and the anti-explosion electric control box and the auxiliary water tank are arranged in the front cavity; the main water tank is arranged on the side of the shell and communicated with the bottom of the rear cavity, the water mist separation plate is horizontally arranged in the rear cavity and divides the upper portion of the rear cavity into a fan chamber, and the lower portion of the rear cavity is divided into a water mist dust removal sputtering chamber. The bottom of the dust inlet channel extends into the water mist dust removal sputtering chamber, the bottom end of the dust inlet channel faces the water surface of the bottom of the rear cavity, and the two water mist dust removal sputtering airflow channels are arranged in the water mist dust removal sputtering chamber and located on the two sides of the dust inlet channel correspondingly. The grinding device can efficiently purify grinding dust and is high in safety performance.

Description

Technical Field

[0001] The present invention relates to the technical field of dust removal equipment, and specifically to a wet passive dust removal device. Background Art

[0002] In modern surface treatment processes of metal and non-metal components, grinding is an essential step, such as welded parts, castings, metal cuttings, bakelite parts, plastic parts, etc.

[0003] There are the following types of grinding dust removal equipment nowadays:

[0004] First, dry grinding dust removal equipment, which conducts simple filtration through a suction fan and a filter element. This type of grinding equipment is only applicable to non-metal grinding dust removal and cannot be used for metal grinding dust removal. Because during the grinding dust removal process of metal, the sizes of metal particles are uneven, and large particles will carry a large amount of heat, causing the filter element to burn. At the same time, plastic grinding powder will also carry static electricity. When the static electricity of the plastic powder accumulates to a certain extent, spontaneous combustion will occur. Therefore, for both metal and non-metal, the safety of this dry grinding dust removal equipment in terms of fire is extremely low.

[0005] Second, wet grinding dust removal equipment, which adopts a waterfall water curtain structure. It is mostly used in spray painting rooms and can also be used for grinding dust removal. However, the dust removal effect of this wet dust removal equipment is not ideal. Although it effectively avoids the possibility of fire, its biggest drawback is its very low dust removal efficiency. There are still about 70% of fine grinding particles in the gas after dust removal, which not only pollutes the environment but also causes certain harm to the human body.

[0006] Third, dry-wet integrated grinding dust removal equipment, which combines the functions of the above two types of equipment. Its dust removal effect is far better than the above two types, but there are also certain drawbacks: the dust removal efficiency of the water mist dust removal sputtering chamber is still low. During the grinding dust removal process, there are still about 30% of fine particulate matters discharged, which still causes certain pollution to the environment and the harm to the human body cannot be underestimated. It is not suitable for grinding dust removal of metals that are reactive with water such as aluminum, otherwise there will be risks of explosion and combustion. Summary of the Invention

[0007] The technical problem to be solved by the present invention is to provide a wet passive dust removal device that can efficiently purify grinding dust and has high safety performance.

[0008] The technical solution of the present invention is as follows:

[0009] A wet passive dust removal device includes a housing, an explosion-proof electric control box, a main water tank, a secondary water tank, a fan, a dust inlet passage, two water mist dust removal sputtering air flow passages, and a water mist separation plate. The interior of the housing is divided into two independent chambers, front and rear, by a vertical partition. The explosion-proof electric control box and the secondary water tank are arranged in the front chamber;

[0010] The described water mist separation plate is horizontally arranged in the rear chamber and divides the upper part of the rear chamber into a blower chamber and the lower part into a water mist dust removal sputtering chamber. The blower is arranged in the blower chamber, and the air inlet at the bottom end of the blower faces the water mist separation plate. An air outlet hole is arranged on the outer shell at the top end of the rear chamber, and the air outlet at the top end of the blower faces the air outlet hole;

[0011] The described main water tank is arranged on the side of the outer shell, and an opening communicating with the bottom of the water mist dust removal sputtering chamber is arranged at the bottom of the main water tank. The water in the main water tank flows into the bottom of the water mist dust removal sputtering chamber through the opening. The dust inlet channel is arranged on the side of the outer shell. The bottom of the dust inlet channel extends into the water mist dust removal sputtering chamber of the rear chamber, and the air outlet at the bottom end of the dust inlet channel faces downward towards the water surface at the bottom of the water mist dust removal sputtering chamber. A reverse U-shaped water isolation plate is hermetically connected between the left side plate and the right side plate of the outer shell in the water mist dust removal sputtering chamber, and the bottom of the dust inlet channel is located between the two vertical parts of the reverse U-shaped water isolation plate. There is a gap between the horizontal part of the reverse U-shaped water isolation plate and the water mist separation plate, and there are gaps between the two vertical parts of the reverse U-shaped water isolation plate and the front plate and the rear plate of the outer shell respectively. The horizontal height of the bottom ends of the two vertical parts of the reverse U-shaped water isolation plate is higher than the height of the water surface at the bottom of the water mist dust removal sputtering chamber. One water mist dust removal sputtering air flow channel is arranged on each of the two vertical parts of the reverse U-shaped water isolation plate. The bottom end of the water mist dust removal sputtering air flow channel is the water mist inlet, and the top end is the water mist outlet. The water mist inlets of the two water mist dust removal sputtering air flow channels both face directly below the bottom end of the dust inlet channel, and the water mist outlets of the two water mist dust removal sputtering air flow channels face the inner walls of the front plate and the rear plate of the outer shell respectively;

[0012] The described secondary water tank is provided with a water inlet, the water inlet is connected to an external water pipe, a float valve is arranged at the water inlet, and the float of the float valve floats on the water surface in the secondary water tank. A through hole communicating with the bottom of the water mist dust removal sputtering chamber is arranged at the bottom of the secondary water tank, and the top of the secondary water tank is communicated with the water mist dust removal sputtering chamber through a ventilation pipe.

[0013] A dust inlet chamber is arranged on the side of the outer shell. The main water tank and the dust inlet chamber are respectively arranged on the left and right sides of the outer shell. The dust inlet channel is vertically arranged in the dust inlet chamber. An air inlet pipe communicating with the top end of the dust inlet channel is arranged at the top end of the dust inlet chamber. The bottom end of the dust inlet channel is connected with an inverted L-shaped bent pipe. The inverted L-shaped bent pipe passes through the right side plate of the outer shell and extends into the water mist dust removal sputtering chamber of the rear chamber, and the bottom end of the vertical part of the inverted L-shaped bent pipe, that is, the air outlet, faces downward towards the water surface at the bottom of the water mist dust removal sputtering chamber.

[0014] The described auxiliary water tank is arranged at the lower part of the front chamber, the explosion-proof electric control box is arranged at the upper part of the front chamber, a fan controller is arranged inside the explosion-proof electric control box, the fan controller is electrically connected to the fan through a metal explosion-proof wire pipe, and an electric control switch and an electric control indicator light are arranged on the front end face of the explosion-proof electric control box.

[0015] The top end of the described main water tank is of an open structure, and a water tank cover is arranged at the top end of the main water tank.

[0016] The described water mist separation plate is a plate-like structure composed of a plurality of vertically arranged S-shaped bent plates. The orientations of two adjacent S-shaped bent plates are opposite, that is, two adjacent S-shaped bent plates are symmetric along the central axis between them, and there is a ventilation gap between the bent docking parts of two adjacent S-shaped bent plates.

[0017] A fan partition is arranged in the fan chamber and directly above the water mist separation plate. The described fan is installed on the fan partition, and a ventilation opening communicating with the bottom air inlet of the fan is arranged on the fan partition.

[0018] The water mist dust removal sputtering air flow channels on the two vertical parts of the described inverted U-shaped water separation plate are each composed of two fixed plates, an L-shaped guide plate, a C-shaped guide plate, a vertical guide plate and a horizontal guide plate. The two fixed plates are respectively parallel and fixedly connected to the left side plate and the right side plate of the housing. The two ends of the L-shaped guide plate, the C-shaped guide plate, the vertical guide plate and the horizontal guide plate are respectively close to and fixedly connected to the two fixed plates. The L-shaped guide plate is fixedly connected between the lower parts of the two fixed plates. The C-shaped guide plate is fixedly connected between the upper parts of the two fixed plates and directly above the L-shaped guide plate. The L-shaped notch of the L-shaped guide plate faces the bottom of the dust inlet channel. The C-shaped notch of the C-shaped guide plate faces the inner wall of the front plate or the back plate of the housing. The top end of the vertical guide plate is fixedly connected to the bottom end of the C-shaped guide plate and extends into the L-shaped notch of the L-shaped guide plate. There is a gap between the bottom end of the vertical guide plate and the horizontal part of the L-shaped guide plate. The outer end of the horizontal guide plate is fixedly connected to the inner wall of the front plate or the back plate of the housing. The inner end of the horizontal guide plate horizontally extends into the C-shaped notch of the C-shaped guide plate and there is a gap between the inner end and the inner wall of the C-shaped guide plate, so that the water mist mixed with dust sequentially enters the channel between the C-shaped guide plate and the front plate or the back plate of the housing from the channel formed between the L-shaped guide plate and the vertical guide plate, and after being deflected by the horizontal guide plate, is guided upward to the water mist separation plate.

[0019] A plurality of air outlet holes are arranged on the housing at the top end of the rear chamber. The plurality of air outlet holes are arranged in a matrix and evenly distributed.

[0020] Advantages of the present invention:

[0021] (1). The present invention adopts a wet dust removal structure. By arranging two symmetrical water mist dust removal sputtering air flow channels, the dust removal efficiency is greatly improved.

[0022] (2) The electric control box of the present invention adopts an explosion-proof electric control box. The fan controller inside the explosion-proof electric control box is electrically connected to the fan through a metal explosion-proof wire tube. It is not only applicable to grinding dust removal of ordinary carbon steel and other metals, but also more applicable to grinding dust removal of water-reactive metals such as aluminum. It will not generate risks such as explosion and combustion due to the generation of combustible gases.

[0023] (3) The present invention is provided with a secondary water tank. The bottoms of the secondary water tank, the main water tank and the water mist dust removal sputtering chamber are interconnected. The secondary water tank can open the water inlet through a float valve to replenish water to the main water tank and the water mist dust removal sputtering chamber. However, since the water surface at the bottom of the water mist dust removal sputtering chamber fluctuates during water mist dust removal, the fluctuation will cause the float to float and sink, resulting in the float valve misoperating to open the water inlet on the secondary water tank. Therefore, the present invention realizes the communication between the air inside the secondary water tank and the outside atmosphere by providing a ventilation pipe, so that the top of the secondary water tank is connected to the water mist dust removal sputtering chamber through the ventilation pipe. The ventilation is realized by the ventilation pipe, effectively reducing the fluctuation of the water surface inside the secondary water tank, making the detection and water replenishment of the float valve more accurate and keeping the dust removal efficiency at the highest level.

[0024] (4) The water mist separation plate of the present invention is internally provided with many S-shaped air flow channels, and the channels are dense and numerous. When the water mist containing dust passes through, the dust and water can be mixed multiple times to form large water droplets for secondary sedimentation, further improving the dust removal efficiency and making it safer to use. Description of the Drawings

[0025] Figure 1 is a perspective view of the present invention.

[0026] Figure 2 is a right view of the present invention.

[0027] Figure 3 is Figure 2 the A-A cross-sectional view in

[0028] Figure 4 is a partial structural schematic diagram of the water mist separation plate.

[0029] Figure 5 is a rear view of the present invention.

[0030] Figure 6 is Figure 4 the B-B cross-sectional view in

[0031] Reference numerals: 1 - outer shell, 2 - explosion-proof electric control box, 3 - main water tank, 4 - auxiliary water tank, 5 - fan, 6 - dust intake channel, 7 - water mist separation plate, 71 - S-shaped bent plate, 8 - fan partition plate, 9 - air outlet hole, 10 - dust intake chamber, 11 - water tank cover, 12 - opening, 13 - intake pipe, 14 - inverted L-shaped bent pipe, 15 - horizontal part of the inverted U-shaped water separation plate, 16 - fixing plate, 17 - L-shaped guide plate, 18 - C-shaped guide plate, 19 - vertical guide plate, 20 - horizontal guide plate, 21 - float ball, 22 - vent pipe. Detailed implementation mode

[0032] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative work shall fall within the protection scope of the present invention.

[0033] See Figures 1 - 6 , a wet passive dust removal device, including an outer shell 1, an explosion-proof electric control box 2, a main water tank 3, an auxiliary water tank 4, a fan 5, a dust intake channel 6, a water mist dust removal sputtering air flow channel and a water mist separation plate 7. The inner part of the outer shell 1 is divided into two independent chambers, front and rear, by a vertical partition plate. An explosion-proof electric control box 2 is arranged in the upper part of the front chamber, and an auxiliary water tank 4 is arranged in the lower part. A fan controller is arranged in the explosion-proof electric control box 2, and the fan controller is electrically connected to the fan 5 through a metal explosion-proof wire pipe. An electric control switch and an electric control indicator lamp of the fan 5 are arranged on the front end face of the explosion-proof electric control box 2;

[0034] The water mist separation plate 7 is a plate-like structure composed of a plurality of vertically arranged S-shaped bent plates 71. The orientations of two adjacent S-shaped bent plates 71 are opposite, that is, two adjacent S-shaped bent plates 71 are symmetric along the central axis between them, and there is a ventilation gap between the bent butt joints of two adjacent S-shaped bent plates 71. The water mist separation plate 7 is horizontally arranged in the rear chamber and divides the upper part of the rear chamber into a fan chamber and the lower part into a water mist dust removal sputtering chamber. A fan partition plate 8 is arranged directly above the water mist separation plate 7 in the fan chamber. The fan 5 is installed on the fan partition plate 8, and a ventilation port communicating with the bottom air inlet of the fan 5 is arranged on the fan partition plate 8. A plurality of air outlet holes 9 are arranged on the outer shell 1 at the top of the rear chamber. The plurality of air outlet holes 9 are arranged in a matrix and evenly distributed. The air outlet at the top of the fan 5 faces the plurality of air outlet holes 9;

[0035] A dust inlet chamber 10 is provided on the side of the outer shell 1, and the main water tank 3 and the dust inlet chamber 10 are respectively arranged on the left and right sides of the outer shell 1. The top of the main water tank 3 is an open structure, and a water tank cover 11 is provided on the top of the main water tank 3. An opening 12 communicating with the bottom of the water mist dust removal sputtering chamber is provided at the bottom of the main water tank 3. The water in the main water tank 3 flows into the bottom of the water mist dust removal sputtering chamber through the opening 12. The dust inlet passage 6 is vertically arranged in the dust inlet chamber 10. Two air inlet pipes 13 communicating with the top of the dust inlet passage 6 are provided on the top of the dust inlet chamber 10. The bottom end of the dust inlet passage 6 is connected with an inverted L-shaped bent pipe 14. The inverted L-shaped bent pipe 14 extends through the right side plate of the outer shell 1 to the water mist dust removal sputtering chamber in the rear chamber. The bottom end of the vertical part of the inverted L-shaped bent pipe 14, that is, the air outlet, faces downward towards the water surface at the bottom of the water mist dust removal sputtering chamber;

[0036] A water mist dust removal sputtering chamber has a U-shaped water baffle sealed and connected between the left and right side plates of the outer shell 1. The inverted L-shaped bent pipe 14 is located between the two vertical parts of the U-shaped water baffle. There is a gap between the horizontal part 15 of the U-shaped water baffle and the water mist separation plate 7. There are gaps between the two vertical parts of the U-shaped water baffle and the front and rear plates of the outer shell 1 respectively. The horizontal heights of the bottoms of the two vertical parts of the U-shaped water baffle are both higher than the height of the water surface at the bottom of the water mist dust removal sputtering chamber. One water mist dust removal sputtering air flow channel is provided on each of the two vertical parts of the U-shaped water baffle. The water mist dust removal sputtering air flow channels on the two vertical parts of the U-shaped water baffle are both composed of two fixing plates 16, an L-shaped guide plate 17, a C-shaped guide plate 18, a vertical guide plate 19 and a horizontal guide plate 20. The two fixing plates 16 are respectively parallel and fixedly connected to the left and right side plates of the outer shell 1. The two ends of the L-shaped guide plate 17, the C-shaped guide plate 18, the vertical guide plate 19 and the horizontal guide plate 20 are respectively closely abutted and fixedly connected to the two fixing plates 16. The L-shaped guide plate 17 is fixedly connected between the lower parts of the two fixing plates 16. The C-shaped guide plate 18 is fixedly connected between the upper parts of the two fixing plates 16 and is located directly above the L-shaped guide plate 17. The L-shaped notch of the L-shaped guide plate 17 faces the inverted L-shaped bent pipe 14. The C-shaped notch of the C-shaped guide plate 18 faces the inner wall of the front or rear plate of the outer shell 1. The top end of the vertical guide plate 19 is fixedly connected to the bottom end of the C-shaped guide plate 18 and extends into the L-shaped notch of the L-shaped guide plate 17. There is a gap between the bottom end of the vertical guide plate 19 and the horizontal part of the L-shaped guide plate 17. The outer end of the horizontal guide plate 20 is fixedly connected to the inner wall of the front or rear plate of the outer shell 1. The inner end of the horizontal guide plate 20 horizontally extends into the C-shaped notch of the C-shaped guide plate 18 and has a gap with the inner wall of the C-shaped guide plate 18, so that the water mist inlets at the bottoms of the two water mist dust removal sputtering air flow channels both face directly below the inverted L-shaped bent pipe 14, and the water mist outlets at the tops of the two water mist dust removal sputtering air flow channels respectively face the inner walls of the front and rear plates of the outer shell 1. The water mist mixed with dust sequentially enters the channel between the C-shaped guide plate 18 and the front or rear plate of the outer shell 1 from the channel formed between the L-shaped guide plate 17 and the vertical guide plate 19, and after being deflected by the horizontal guide plate 20, is directed upward to the water mist separation plate 7;

[0037] The secondary water tank 4 is provided with a water inlet, the water inlet is connected to an external water pipe, a float valve is provided at the water inlet, and the float ball 21 of the float valve floats on the water surface in the secondary water tank 4. A through hole communicating with the bottom of the water mist dust removal sputtering chamber is provided at the bottom of the secondary water tank 4. The top of the secondary water tank 4 is communicated with the water mist dust removal sputtering chamber through a ventilation pipe 22, so that the top of the secondary water tank 4 communicates with the atmosphere, avoiding the formation of a vacuum at the top of the secondary water tank 4.

[0038] The working principle of the present invention:

[0039] Start the fan 5 through the electric control switch on the explosion-proof electric control box 2. The dust generated during grinding enters the water mist dust removal sputtering chamber successively through the air inlet pipe 13, the dust inlet channel 6, and the inverted L-shaped bent pipe 14 under the action of the fan 5. Since there is water stored at the bottom of the water mist dust removal sputtering chamber, the dust-laden air flow blows towards the water surface. Under the action of the suction air pressure of the fan 5, waves, water splashes, and water mist will be sputtered on the water surface. At this time, the gas containing dust will be fully mixed with the waves, water splashes, and water mist. After mixing, the water mist and dust mixture with heavier mass will fall into the water at the bottom of the water mist dust removal sputtering chamber. Part of the water mist and dust mixture with lighter mass will continue to flow upward along the two water mist dust removal sputtering air flow channels on both sides of the inverted L-shaped bent pipe 14 under the suction of the fan 5, and then pass through the water mist separation plate 7 for secondary mixing of water mist and dust. After mixing, large water droplets are formed, and the water droplets will fall into the water at the bottom of the water mist dust removal sputtering chamber under the action of gravity. The gas filtered by the water mist separation plate 7 already meets the environmental protection requirements and is discharged through multiple air outlet holes 9 at the top of the rear chamber under the suction of the fan 5.

[0040] When the water levels in the main water tank 3 and the water mist dust removal sputtering chamber that are interconnected drop to the lowest level, since the bottom of the secondary water tank 4, the main water tank 3, and the water mist dust removal sputtering chamber are interconnected, the float ball 21 in the secondary water tank 4 will drop at this time, and the float valve will automatically open the water inlet of the secondary water tank 4 for water replenishment. When the water replenishment reaches the set position, the float ball 21 will float up again, and the float valve will automatically stop water replenishment.

[0041] Although the embodiments of the present invention have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principle and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A wet passive dust removal device, characterized in that: It includes a housing, an explosion-proof electric control box, a main water tank, a secondary water tank, a fan, a dust intake channel, two water mist dust removal sputtering air flow channels, and a water mist separation plate. The interior of the housing is divided into two independent chambers, front and rear, by a vertical partition. The explosion-proof electric control box and the secondary water tank are arranged in the front chamber; The water mist separation plate is horizontally arranged in the rear chamber and divides the upper part of the rear chamber into a fan chamber and the lower part into a water mist dust removal sputtering chamber. The fan is arranged in the fan chamber, and the air inlet at the bottom of the fan faces the water mist separation plate. An air outlet hole is provided on the housing at the top of the rear chamber, and the air outlet at the top of the fan faces the air outlet hole; The main water tank is arranged on the side of the housing, and an opening communicating with the bottom of the water mist dust removal sputtering chamber is provided at the bottom of the main water tank. The water in the main water tank flows into the bottom of the water mist dust removal sputtering chamber through the opening. The dust intake channel is arranged on the side of the housing, and the bottom of the dust intake channel extends into the water mist dust removal sputtering chamber of the rear chamber, and the air outlet at the bottom of the dust intake channel faces downward towards the water surface at the bottom of the water mist dust removal sputtering chamber. A reverse U-shaped water isolation plate is hermetically connected between the left side plate and the right side plate of the housing in the water mist dust removal sputtering chamber, and the bottom of the dust intake channel is located between the two vertical parts of the reverse U-shaped water isolation plate. There is a gap between the horizontal part of the reverse U-shaped water isolation plate and the water mist separation plate, and there are gaps between the two vertical parts of the reverse U-shaped water isolation plate and the front plate and the back plate of the housing respectively. The horizontal height of the bottom ends of the two vertical parts of the reverse U-shaped water isolation plate is higher than the height of the water surface at the bottom of the water mist dust removal sputtering chamber. One water mist dust removal sputtering air flow channel is provided on each of the two vertical parts of the reverse U-shaped water isolation plate. The bottom end of the water mist dust removal sputtering air flow channel is a water mist inlet, and the top end is a water mist outlet. The water mist inlets of the two water mist dust removal sputtering air flow channels both face directly below the bottom end of the dust intake channel, and the water mist outlets of the two water mist dust removal sputtering air flow channels face the inner walls of the front plate and the back plate of the housing respectively; The secondary water tank is provided with a water inlet, and the water inlet is connected to an external tap water pipe. A float valve is provided at the water inlet, and the floating ball of the float valve floats on the water surface in the secondary water tank. A through hole communicating with the bottom of the water mist dust removal sputtering chamber is provided at the bottom of the secondary water tank, and the top of the secondary water tank is communicated with the water mist dust removal sputtering chamber through a ventilation pipe.

2. The wet passive dust removal device according to claim 1, characterized in that: A dust intake chamber is provided on the side of the housing. The main water tank and the dust intake chamber are respectively arranged on the left and right sides of the housing. The dust intake channel is vertically arranged in the dust intake chamber. An air inlet pipe communicating with the top end of the dust intake channel is provided at the top of the dust intake chamber. The bottom end of the dust intake channel is connected with an inverted L-shaped bent pipe, and the inverted L-shaped bent pipe passes through the right side plate of the housing and extends into the water mist dust removal sputtering chamber of the rear chamber. The bottom end of the vertical part of the inverted L-shaped bent pipe, that is, the air outlet, faces downward towards the water surface at the bottom of the water mist dust removal sputtering chamber.

3. A wet passive dust removal device according to claim 1, characterized in that: The secondary water tank is arranged at the lower part of the front chamber, and the explosion-proof electric control box is arranged at the upper part of the front chamber. A fan controller is arranged in the explosion-proof electric control box. The fan controller is electrically connected to the fan through a metal explosion-proof wire tube. An electric control switch and an electric control indicator light are provided on the front end face of the explosion-proof electric control box.

4. A wet passive dust removal device according to claim 1, characterized in that: The top of the main water tank is an open structure, and a water tank cover is arranged at the top of the main water tank.

5. The wet passive dust removal device according to claim 1, characterized in that: The water mist separation plate is a plate-like structure composed of a plurality of vertically arranged S-shaped bent plates. The orientations of two adjacent S-shaped bent plates are opposite, that is, two adjacent S-shaped bent plates are symmetric along the central axis between them, and there is a ventilation gap between the bent docking parts of two adjacent S-shaped bent plates.

6. The wet passive dust removal device according to claim 1, characterized in that: A fan partition is arranged in the fan chamber and directly above the water mist separation plate. The fan is installed on the fan partition, and a ventilation opening communicating with the bottom air inlet of the fan is arranged on the fan partition.

7. The wet passive dust removal device according to claim 1, characterized in that: The water mist dust removal sputtering air flow channels on the two vertical parts of the inverted U-shaped water separation plate are each composed of two fixed plates, an L-shaped guide plate, a C-shaped guide plate, a vertical guide plate and a horizontal guide plate. The two fixed plates are respectively parallel and fixedly connected to the left side plate and the right side plate of the housing. The two ends of the L-shaped guide plate, the C-shaped guide plate, the vertical guide plate and the horizontal guide plate are respectively close to and fixedly connected to the two fixed plates. The L-shaped guide plate is fixedly connected between the lower parts of the two fixed plates. The C-shaped guide plate is fixedly connected between the upper parts of the two fixed plates and is directly above the L-shaped guide plate. The L-shaped notch of the L-shaped guide plate faces the bottom of the dust inlet channel. The C-shaped notch of the C-shaped guide plate faces the inner wall of the front plate or the back plate of the housing. The top end of the vertical guide plate is fixedly connected to the bottom end of the C-shaped guide plate and extends into the L-shaped notch of the L-shaped guide plate. There is a gap between the bottom end of the vertical guide plate and the horizontal part of the L-shaped guide plate. The outer end of the horizontal guide plate is fixedly connected to the inner wall of the front plate or the back plate of the housing. The inner end of the horizontal guide plate horizontally extends into the C-shaped notch of the C-shaped guide plate and there is a gap between the inner end and the inner wall of the C-shaped guide plate, so that the water mist mixed with dust sequentially enters the channel between the C-shaped guide plate and the front plate or the back plate of the housing from the channel formed between the L-shaped guide plate and the vertical guide plate, and after being deflected by the horizontal guide plate, is upwardly guided to the water mist separation plate.

8. A wet passive dust removal device according to claim 1, characterized in that: A plurality of air outlet holes are arranged on the housing at the top of the rear chamber, and the plurality of air outlet holes are arranged in a matrix and evenly distributed.

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