Exhaust gas purification device

Abstract

The utility model relates to the technical field of waste gas treatment. In view of the problems that the existing waste gas purification devices have poor purification effects, and purification functional parts are difficult to replace or clean, which easily leads to reduced treatment efficiency, a waste gas purification device is provided, including a purification box, which is equipped with an air inlet pipe and an exhaust pipe. The inner cavity of the purification box is provided with a slag discharge component, a spray component, a filter component, an electrostatic dust removal component, and a cleaning component for cleaning the electrostatic dust removal component from bottom to top. The air inlet pipe is arranged between the filter component and the electrostatic dust removal component, and the exhaust pipe is connected to the top of the purification box. The slag pushing plate of the slag discharge component moves toward the slag outlet to push out impurities deposited in the purification box. The entire device has a reasonable structural design, combines multiple purification methods, has a good purification effect, and has an effective self-cleaning function through the slag discharge component, the cleaning component, and the vibration motor, which can maintain a high purification efficiency.

Description

Technical Field

[0001] The utility model relates to the technical field of waste gas treatment, in particular to a waste gas purification device. Background Art

[0002] The waste gas generated by industrial production is full of a lot of dust and harmful gases. If these waste gases are directly discharged into the atmosphere, they will cause serious environmental pollution. If absorbed by the human body, they will seriously affect human health. With the continuous development of my country's technology, the waste gas emissions from industrial production workshops are subject to increasingly strict supervision and control, and waste gas purification devices need to be used in time for purification to meet environmental protection requirements. Existing waste gas purification devices generally have poor purification effects and the purification function parts are difficult to replace or clean, which can easily lead to reduced processing efficiency.

[0003] The patent with publication number CN215876778U provides an exhaust gas purification device for air pollution control, including a washing tank body and a filtering device, the top of the washing tank body is fixedly connected with an exhaust pipe, the right side of the washing tank body is movably installed with a connecting pipe, the right side of the connecting pipe is movably connected with a shell, and the filtering device includes an air inlet, which is arranged on the right side of the shell, and a ventilation plate is arranged inside the shell near the central axis. By setting the filtering device, when the exhaust gas enters the original air cavity from the inlet pipe through the air inlet, the exhaust gas passes through the adsorption tube, and the inner wall of the adsorption tube is provided with an adsorbent, which can adsorb and neutralize harmful substances and large particles of solids in the exhaust gas, and the ash layer on the filter element is cleaned by the spray pipe and the back-blowing device, so as to extend the service life of the device, and multiple adsorption and filtration effectively improve the exhaust gas purification rate. However, part of the particulate matter in the exhaust gas will settle after spraying, and the exhaust gas purification device is inconvenient to deal with the problem of impurities deposited at the bottom of the washing tank.

[0004] Therefore, there is an urgent need to provide an exhaust gas purification device with an effective self-cleaning function that can maintain high purification efficiency and purification effect. Utility Model Content

[0005] The purpose of the utility model is to solve the problems of poor purification effect and difficulty in replacing or cleaning purification function parts in existing waste gas purification devices, which may lead to reduced treatment efficiency. The present application provides a waste gas purification device that can achieve the technical effect of having an effective self-cleaning function and maintaining high purification efficiency, and has good purification effect and can monitor the purification effect in real time.

[0006] The utility model is achieved through the following technical solutions: an exhaust gas purification device, comprising a purification box, which is equipped with an air inlet pipe and an exhaust pipe; the inner cavity of the purification box is provided with a slag discharge component, a spray component, a filter component, an electrostatic dust removal component and a cleaning component in sequence from bottom to top, the air inlet pipe is communicated with the side wall surface of the purification box, the air inlet pipe is arranged between the filter component and the electrostatic dust removal component, and the exhaust pipe is communicated with the top of the purification box; the slag discharge component comprises a slag pushing plate, the slag pushing plate is movably connected to the inner bottom of the purification box, a slag outlet is opened on the side wall surface of the purification box, the slag outlet is used for the slag pushing plate to enter and exit, and the side wall surface of the purification box is movably connected with a sealing plate covering the slag outlet.

[0007] Preferably, the slag discharge assembly also includes a first telescopic rod, which is equipped with a first telescopic motor, which is installed on the outer wall of the purification box, one end of the first telescopic rod is detachably connected to the output shaft of the first telescopic motor, and the other end of the first telescopic rod is detachably connected to the side of the slag pushing plate facing away from the slag outlet.

[0008] Preferably, the spray assembly includes a plurality of spray pipes, and the plurality of spray pipes are all connected to the side wall of the purification box, and the plurality of spray pipes are all provided with a spray head, and the tail end of the spray head is detachably connected to an end of the spray pipe close to the purification box; the spray assembly also includes a liquid guide pipe and a liquid discharge pipe, the liquid guide pipe is connected to the liquid discharge pipe through a three-way joint, one end of the liquid guide pipe is connected to the side wall of the purification box, and the other end of the liquid guide pipe is connected to one end of the three-way joint, and one end of one of the spray pipes away from the purification box is connected to the other end of the three-way joint.

[0009] Preferably, the spray assembly further includes a liquid level meter, and the liquid level meter is arranged below the spray pipe.

[0010] Preferably, the filter assembly includes a filter plate and a vibration motor, the filter plate is mounted in the inner cavity of the purification box, the vibration motor is installed on the outer side wall of the purification box, and the output shaft of the vibration motor is detachably connected to the end of the filter plate.

[0011] Preferably, the electrostatic precipitator assembly includes a bracket, a plurality of placement slots and a plurality of electrostatic precipitator plates; the bracket includes a frame, the frame is mounted in the inner cavity of the purification box, the frame is detachably connected to the inner wall surface of the purification box, a plurality of placement slots are spaced apart from each other on the frame, and a plurality of the electrostatic precipitator plates are respectively installed in the plurality of placement slots.

[0012] Preferably, the bracket also includes a support plate, and along the arrangement direction of the multiple placement plates, the two ends of the support plate are detachably connected to the two sides of the frame respectively, and the bottoms of the multiple placement grooves are detachably connected to the surface of the support plate.

[0013] Preferably, the cleaning assembly includes a cleaning brush and a second telescopic rod, the second telescopic rod is provided with a second telescopic motor, the second telescopic motor is installed on the outer wall of the purification box, one end of the second telescopic rod is detachably connected to the output shaft of the second telescopic motor, the other end of the second telescopic rod is detachably connected to the tail end of the cleaning brush, and the bristles of the cleaning brush face the surface of the electrostatic dust removal plate.

[0014] Preferably, it also includes a gas detector, which is installed on the top of the purification box. The exhaust pipe is provided with a branch pipe, one end of the branch pipe is connected to the side wall surface of the exhaust pipe close to the top of the purification box, and the other end of the branch pipe is connected to the gas detector.

[0015] Preferably, a plurality of locking universal wheels are provided at the bottom of the purification box.

[0016] The technical solution of the utility model has the following beneficial effects:

[0017] (1) Exhaust gas is introduced into the purification box through the air inlet pipe, and the purified gas is discharged through the exhaust pipe; large particles such as dust carried by the exhaust gas settle downward due to their own gravity, fall into the spray component through the filter component, and the external spray liquid is introduced through the spray component to spray and purify the exhaust gas. The exhaust gas floating above the filter component continues to rise to the electrostatic dust removal component, and the electrostatic field is used to remove the residual tiny particles in the exhaust gas through the electrostatic dust removal component, and the purification effect is good.

[0018] (2) The slag pushing plate of the slag discharge assembly pushes the impurities deposited at the bottom of the purification box to the slag outlet for discharge; the vibration motor of the filter assembly drives the filter plate to vibrate to shake off the dust covering the filter plate; the second telescopic motor of the cleaning assembly drives the telescopic rod to extend and retract, which in turn drives the cleaning brush to move back and forth to clean the dust accumulated on the surface of the electrostatic dust removal plate. The entire device has an effective self-cleaning function and can maintain a high purification efficiency.

[0019] (3) The gas indicators at the exhaust pipe branch are monitored in real time through a gas detector to ensure that the exhausted gas meets environmental protection requirements. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the technical solutions of the embodiments of the utility model, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the utility model and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without paying creative work.

[0021] Figure 1 It is a partial cross-sectional structural schematic diagram of the exhaust gas purification device in Example 1;

[0022] Figure 2 for Figure 1 A schematic diagram of the structure of the local enlargement of the A part;

[0023] Figure 3 for Figure 1 A schematic diagram of the structure of a local enlargement of the B part;

[0024] Figure 4 This is a schematic diagram of the structure of the electrostatic precipitator assembly in Example 1.

[0025] Figure markings: 1-purification box, 11-slag outlet, 12-inlet pipe, 13-exhaust pipe, 131-branch pipe, 2-slag discharge assembly, 21-slag pushing plate, 22-first telescopic rod, 23-first telescopic motor, 3-spray assembly, 31-spray pipe, 32-spray head, 33-liquid guide pipe, 34-drain pipe, 35-tee joint, 36-liquid level meter, 4-filter assembly, 41-filter plate, 411-through hole, 42-vibration motor, 5-electrostatic dust removal assembly, 51-bracket, 511-frame, 512-support plate, 52-placement groove, 53-electrostatic dust removal plate, 6-cleaning assembly, 61-cleaning brush, 611-bristles, 62-second telescopic rod, 63-second telescopic motor, 7-sealing plate, 8-gas detector, 9-locking universal wheel, 10-hinge shaft. DETAILED DESCRIPTION

[0026] In order to make the purpose, technical scheme and advantages of the embodiments of the utility model clearer, the technical scheme in the embodiments of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiments of the utility model. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Generally, the components of the embodiments of the utility model described and shown in the drawings here can be arranged and designed in various different configurations.

[0027] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the present invention to be protected, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0028] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0029] Example 1

[0030] like Figures 1 to 4 As shown, this embodiment provides an exhaust gas purification device, including a purification box 1, an air intake pipe 12 configured in the purification box 1 allows the exhaust gas to pass into the inner cavity of the purification box 1, and an exhaust pipe 13 configured in the purification box 1 is used to discharge the purified gas. The air intake pipe 12 and the exhaust pipe 13 are both equipped with a control valve (not shown) and a control pump (not shown). The inner cavity of the purification box 1 is sequentially provided with a slag discharge component 2, a spray component 3, a filter component 4, an electrostatic dust removal component 5 and a cleaning component 6 for cleaning the electrostatic dust removal component 5 from bottom to top, the air intake pipe 12 is connected to the side wall surface of the purification box 1, the air intake pipe 12 is arranged between the filter component 4 and the electrostatic dust removal component 5, and the exhaust pipe 13 is connected to the top of the purification box 1. After intake, the dust and other large particles carried by the exhaust gas settle downward due to their own gravity, and fall into the spray component 3 through the filter component 4. The external spray liquid is introduced through the spray component 3 to spray and purify the exhaust gas. The exhaust gas floating above the filter component 4 continues to rise to the electrostatic dust removal component 5, and the electrostatic dust removal component 5 uses the electrostatic field to remove the residual tiny particles in the exhaust gas. The structure of the whole device is reasonably designed, combined with multiple purification methods, and has a good purification effect.

[0031] The slag pusher plate 21 of the slag discharge assembly 2 is movably connected to the inner bottom of the purification box 1, and the slag outlet 11 provided on the side wall of the purification box 1 is used for the slag pusher plate 21 to enter and exit. The side wall of the purification box 1 is movably connected to a sealing plate 7 covering the slag outlet 11, and the sealing plate 7 is movably hinged to the side wall of the purification box 1 through a hinge shaft. The entire device has a reasonable structural design, and has a good purification effect by combining multiple purification methods. The slag discharge assembly 2, the cleaning assembly 6, and the vibration motor 42 have an effective self-cleaning function, and can maintain a high purification efficiency.

[0032] In this embodiment, the slag discharge assembly 2 further includes a first telescopic rod 22, and a first telescopic motor 23 configured for the first telescopic rod 22 is installed on the outer wall of the purification box 1. One end of the first telescopic rod 22 is connected to the output shaft of the first telescopic motor 23, and the other end of the first telescopic rod 22 is screwed to a side of the slag pusher plate 21 facing away from the slag outlet 11. The first telescopic motor 23 drives the first telescopic rod 22 to extend, and can drive the slag pusher plate 21 to move toward the slag outlet 11, thereby pushing out impurities deposited in the purification box 1.

[0033] In this embodiment, the spray assembly 3 includes a plurality of spray pipes 31, at least 2, and the plurality of spray pipes 31 are all connected to the side wall of the purification box 1. The plurality of spray pipes 31 are all provided with a spray head 32, and the tail end of the spray head 32 is connected to the end of the spray pipe 31 close to the purification box 1 through a pipe joint. After the spray pipe 31 is connected to an external water source or purification liquid, the waste gas located below the filter plate 41 is sprayed downward through the spray head 32 for purification. According to different types of waste gas, activated carbon, oxidant or other adsorbents can be selected as the purification liquid.

[0034] The spray assembly 3 further includes a liquid guide tube 33 and a liquid discharge tube 34, the liquid guide tube 33 and the liquid discharge tube 34 are connected via a three-way joint 35, one end of the liquid guide tube 33 is connected to the side wall of the purification box 1, the other end of the liquid guide tube 33 is connected to one end of the three-way joint 35, and one end of one spray pipe 31 away from the purification box 1 is connected to the other end of the three-way joint 35. The liquid guide tube 33 is connected to the spray pipe 31 via the three-way joint 35 to realize the circulation and spraying of the liquid in the purification box 1, thereby avoiding waste; and when the purification efficiency of the spray liquid decreases, the liquid guide tube 33 is connected to the liquid discharge tube 34 via the three-way joint 35 to discharge the waste spray liquid.

[0035] In this embodiment, the liquid level gauge 36 of the spray assembly 3 is arranged below the spray pipe 31, and the liquid level gauge 36 is installed on the side wall of the purification box 1 to monitor the liquid level of the spray liquid in the purification box 1. The liquid level gauge 36 can be a digital liquid level gauge 36 currently available on the market. Multiple spray pipes 31, the liquid guide pipe 33 and the drainage pipe 34 are all provided with a control valve (not shown) and a control pump (not shown). When the reading of the liquid level gauge 36 shows that the liquid level of the spray liquid is high, that is, the liquid level of the spray liquid is close to the filter assembly 4, the spray pipe 31 connected to the external liquid is closed, and the liquid guide pipe 33 and the spray pipe 31 connected to the liquid guide pipe 33 are circulated and sprayed. After multiple cycles of spraying, the waste liquid is discharged through the drainage pipe 34 connected to the liquid guide pipe 33, and then the external spray liquid is introduced to circulate.

[0036] In this embodiment, the filter assembly 4 includes a filter plate 41 and a vibration motor 42. The filter plate 41 is mounted on the inner cavity of the purification box 1, and the vibration motor 42 is installed on the outer wall of the purification box 1. The output shaft of the vibration motor 42 is connected to the end shaft of the filter plate 41. After the air is taken in, the large particles such as dust carried by the exhaust gas settle downward due to their own gravity and can fall through the multiple through holes 411 provided in the filter plate 41. The operation of the vibration motor 42 can make the filter plate 41 vibrate to shake off the dust and the like covering the filter plate 41, thereby achieving the purpose of effectively cleaning the filter plate 41.

[0037] In this embodiment, the electrostatic dust removal assembly 5 includes a bracket 51, a plurality of placement slots 52 and a plurality of electrostatic dust removal plates 53; the bracket 51 includes a frame 511, the frame 511 is mounted in the inner cavity of the purification box 1, the frame 511 is welded to the inner wall of the purification box 1, a plurality of placement slots 52 are spaced apart on the frame 511, the two ends of the placement slots 52 are respectively welded to the two opposite sides of the frame 511, and a plurality of electrostatic dust removal plates 53 are respectively installed in the plurality of placement slots 52. The placement slots 52 are arranged at intervals, which is conducive to the exhaust gas rising to the surface of the electrostatic dust removal plate 53 through the gap. The electrostatic dust removal plate 53 is controlled to be turned on or off by an external controller (not shown). The controller can be a single-chip microcomputer (such as an 8051 series single-chip microcomputer, an STM32 series single-chip microcomputer), an FPGA programmable controller, etc.

[0038] In this embodiment, the bracket 51 further includes a support plate 512, and along the arrangement direction of the plurality of placement plates, the two ends of the support plate 512 are respectively welded to the two sides of the frame 511, and the bottoms of the plurality of placement slots 52 are all welded to the surface of the support plate 512. The support plate 512 can further stably support the placement slots 52 and the electrostatic dust removal plates 53 in the placement slots 52.

[0039] In this embodiment, the cleaning assembly 6 includes a cleaning brush 61 and a second telescopic rod 62. The second telescopic motor 63 configured for the second telescopic rod 62 is installed on the outer wall of the purification box 1. One end of the second telescopic rod 62 is connected to the output shaft of the second telescopic motor 63. The other end of the second telescopic rod 62 is screwed to the tail end of the cleaning brush 61. The bristles 611 of the cleaning brush 61 face the surface of the electrostatic dust removal plate 53. The second telescopic motor 63 drives the telescopic rod to extend and retract, thereby driving the cleaning brush 61 to move back and forth to clean the dust accumulated on the surface of the electrostatic dust removal plate 53.

[0040] In this embodiment, a gas detector 8 is also included. The gas detector 8 is installed on the top of the purification box 1. One end of the branch pipe 131 configured in the exhaust pipe 13 is connected to the side wall surface of the exhaust pipe 13 close to the top of the purification box 1, and the other end of the branch pipe 131 is connected to the gas detector 8. The gas detector 8 can monitor in real time whether the gas at the branch pipe 131 of the exhaust pipe 13 can meet the emission requirements. If the requirements are met, the control valve (not shown) and the control pump (not shown) of the exhaust pipe 13 are opened to discharge the gas from the exhaust pipe 13; if the requirements are not met, the exhaust pipe 13 is closed in time.

[0041] In this embodiment, a plurality of locking universal wheels 9 are provided at the bottom of the purification box 1 to facilitate moving the purification box 1 to the working area.

[0042] Specific workflow:

[0043] S1: Open the control valve and control pump of the air inlet pipe 12, introduce a certain amount of gas into the purification box 1, turn on the gas detector 8 to monitor various indicators of the exhaust gas in real time, and turn on the liquid level meter 36;

[0044] S2: Open the control pump and control valve of the spray pipe 31 connected to the external spray liquid, and pass the external spray liquid to spray and purify the exhaust gas. At the same time, open the electrostatic dust removal plate 53 through the controller.

[0045] Large particles such as dust carried by the exhaust gas settle downward due to their own gravity and fall into the spray liquid through the through holes 411 of the filter plate 41 for spray purification; the exhaust gas floating above the filter plate 41 continues to rise to the electrostatic dust removal plate 53 to remove residual tiny particles.

[0046] S3: When the reading of the liquid level meter 36 shows that the liquid level of the spraying liquid is high, that is, the liquid level of the spraying liquid is close to the filter assembly 4, the control pump and the control valve of the spraying pipe 31 connected to the external liquid are closed.

[0047] S4: Turn on the control pump and the control valve of the liquid guiding pipe 33, and turn on the control pump and the control valve of the spray pipe 31 connected to the liquid guiding pipe 33 to perform cyclic spraying.

[0048] S5: The gas detector 8 detects whether the gas at the branch pipe 131 of the exhaust pipe 13 can meet the emission requirements. If the requirements are met, the control valve and control pump of the exhaust pipe 13 are opened to allow the gas to be discharged from the exhaust pipe 13.

[0049] S6: Open the air inlet pipe 12 to introduce new exhaust gas, and repeat the cycle spraying and electrostatic dust removal steps according to the above method.

[0050] S7: In order to maintain high purification efficiency and purification effect of the device, periodically or when it is found that the gas purification efficiency is reduced, the control pump and control valve of the spray pipe 31 connected to the liquid guide pipe 33 are closed, and the control pump and control valve of the drain pipe 34 are opened to discharge the waste liquid through the drain pipe 34 connected to the liquid guide pipe 33. New spray liquid is connected from the outside for spraying;

[0051] Turn on the vibration motor 42 so that the vibration motor 42 drives the filter plate 41 to vibrate, so as to shake off the dust covering the filter plate 41;

[0052] Turn on the second telescopic motor 63, so that the second telescopic motor 63 drives the telescopic rod to extend and retract, thereby driving the cleaning brush 61 to move back and forth to clean the dust accumulated on the surface of the electrostatic dust removal plate 53;

[0053] The sealing plate 7 is opened, and the first telescopic motor 23 is turned on. The first telescopic motor 23 drives the first telescopic rod 22 to extend, and can drive the slag pushing plate 21 to move toward the slag outlet 11 to push out the impurities deposited in the purification box 1.

[0054] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. For those skilled in the art, the present invention may be subject to various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. An exhaust gas purification device, characterized in that: It comprises a purification box (1), wherein the purification box (1) is provided with an air intake pipe (12) and an air exhaust pipe (13); The inner cavity of the purification box (1) is provided with a slag discharge assembly (2), a spray assembly (3), a filter assembly (4), an electrostatic dust removal assembly (5) and a cleaning assembly (6) in sequence from bottom to top; the air inlet pipe (12) is connected to the side wall surface of the purification box (1); the air inlet pipe (12) is arranged between the filter assembly (4) and the electrostatic dust removal assembly (5); and the exhaust pipe (13) is connected to the top of the purification box (1); The slag discharge assembly (2) comprises a slag pushing plate (21) which is movably connected to the inner bottom of the purification box (1); a slag outlet (11) is provided on the side wall of the purification box (1); the slag outlet (11) is used for the slag pushing plate (21) to enter and exit; and a sealing plate (7) which covers the slag outlet (11) is movably connected to the side wall of the purification box (1).

2. The exhaust gas purification device according to claim 1, characterized in that: The slag discharge assembly (2) further comprises a first telescopic rod (22), the first telescopic rod (22) being provided with a first telescopic motor (23), the first telescopic motor (23) being mounted on an outer wall of the purification box (1), one end of the first telescopic rod (22) being detachably connected to an output shaft of the first telescopic motor (23), and the other end of the first telescopic rod (22) being detachably connected to a side of the slag pushing plate (21) facing away from the slag outlet (11).

3. The exhaust gas purification device according to claim 1, characterized in that: The spray assembly (3) comprises a plurality of spray pipes (31), each of the plurality of spray pipes (31) being in communication with a side wall surface of the purification box (1), each of the plurality of spray pipes (31) being provided with a spray head (32), and the tail end of the spray head (32) being detachably connected to an end of the spray pipe (31) close to the purification box (1); The spray assembly (3) further comprises a liquid guide tube (33) and a liquid discharge tube (34); the liquid guide tube (33) and the liquid discharge tube (34) are connected via a three-way joint (35); one end of the liquid guide tube (33) is connected to a side wall surface of the purification box (1); the other end of the liquid guide tube (33) is connected to one end of the three-way joint (35); and one end of one of the spray pipes (31) away from the purification box (1) is connected to the other end of the three-way joint (35).

4. The exhaust gas purification device according to claim 3, characterized in that: The spray assembly (3) further comprises a liquid level meter (36), wherein the liquid level meter (36) is arranged below the spray pipe (31).

5. The exhaust gas purification device according to claim 1, characterized in that: The filter assembly (4) comprises a filter plate (41) and a vibration motor (42); the filter plate (41) is mounted in the inner cavity of the purification box (1); the vibration motor (42) is installed on the outer wall of the purification box (1); and the output shaft of the vibration motor (42) is detachably connected to the end of the filter plate (41).

6. The exhaust gas purification device according to any one of claims 1 to 5, characterized in that: The electrostatic precipitator assembly (5) comprises a bracket (51), a plurality of placement slots (52) and a plurality of electrostatic precipitator plates (53); The bracket (51) comprises a frame (511), the frame (511) is mounted in the inner cavity of the purification box (1), the frame (511) is detachably connected to the inner wall surface of the purification box (1), a plurality of placement slots (52) are spaced apart and mounted on the frame (511), and a plurality of electrostatic dust removal plates (53) are respectively installed in the plurality of placement slots (52).

7. The exhaust gas purification device according to claim 6, characterized in that: The bracket (51) also includes a support plate (512), and along the arrangement direction of the plurality of placement grooves (52), the two ends of the support plate (512) are respectively detachably connected to the two sides of the frame (511), and the bottoms of the plurality of placement grooves (52) are detachably connected to the surface of the support plate (512).

8. The exhaust gas purification device according to claim 6, characterized in that: The cleaning assembly (6) comprises a cleaning brush (61) and a second telescopic rod (62), wherein the second telescopic rod (62) is provided with a second telescopic motor (63), and the second telescopic motor (63) is mounted on the outer wall of the purification box (1), one end of the second telescopic rod (62) is detachably connected to the output shaft of the second telescopic motor (63), and the other end of the second telescopic rod (62) is detachably connected to the rear end of the cleaning brush (61), and the bristles (611) of the cleaning brush (61) face the surface of the electrostatic dust removal plate (53).

9. The exhaust gas purification device according to claim 1, characterized in that: It also includes a gas detector (8), which is installed on the top of the purification box (1). The exhaust pipe (13) is provided with a branch pipe (131), one end of the branch pipe (131) is connected to the side wall surface of the exhaust pipe (13) close to the top of the purification box (1), and the other end of the branch pipe (131) is connected to the gas detector (8).

10. The exhaust gas purification device according to claim 1, characterized in that: A plurality of locking universal wheels (9) are arranged at the bottom of the purification box (1).

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