CN112704966A - Waste gas treatment system and control method thereof - Google Patents

Abstract

The invention discloses a waste gas treatment system and a control method thereof, belonging to the technical field of automobile coating, wherein the waste gas treatment system comprises a spray booth, wherein a first side wall of the spray booth is provided with an air inlet, and a second side wall is provided with an air outlet; the waste gas treatment device comprises a box body positioned in the spray chamber, and a filtering component and a rotating wheel which are respectively positioned in the box body; the backflow filtering device comprises a horizontal driving piece arranged at the bottom of the spray booth, a vertical driving piece connected to the horizontal driving piece, a filtering box connected to the vertical driving piece, and a filter positioned in the filtering box; and the controller is used for controlling the horizontal driving piece and the vertical driving piece to act when the exhaust gas treatment device in the paint spraying chamber is determined to be stopped or the filtering component needs to be replaced, so that the backward flowing wind energy is filtered by the filter. The invention can reduce the probability of blockage and potential safety hazard of the rotating wheel due to backward flowing wind, prolong the service life of the rotating wheel and avoid economic loss caused by replacing the rotating wheel.

Description

Waste gas treatment system and control method thereof

Technical Field

The invention relates to the technical field of automobile coating, in particular to an exhaust gas treatment system and a control method thereof.

Background

Painting of vehicles is generally performed in a painting booth, and in order to prevent exhaust paint mist from polluting the environment, the exhaust paint mist is generally treated by an exhaust gas treatment apparatus and then discharged.

In the prior art, the exhaust gas treatment equipment comprises a filter bag and a rotating wheel positioned at the downstream of the filter bag, and after the paint mist exhaust gas is filtered by the filter bag, the paint mist exhaust gas needs to be subjected to depth filtration by the rotating wheel. In the operation process of the waste gas treatment equipment, equipment failure or filter bag replacement can occur, the equipment failure comprises the failure of an RTO gas system or a valve, the waste gas treatment equipment needs to be stopped and suspended for treating paint mist waste gas, and a paint spraying chamber needs to stop spraying paint in time. When the condition of shutting down appears in exhaust-gas treatment equipment, on-the-spot discovery runner is kept away from the lee side of crossing the filter bag and has been had the downdraught to ventilate to the runner, and the residual paint granule that carries in the wind can cause the pollution to the runner, causes runner jam and potential safety hazard, leads to the life of runner shorter, need change the runner when serious, causes serious economic loss.

Disclosure of Invention

The invention aims to provide an exhaust gas treatment system and a control method thereof, which can reduce blockage and potential safety hazards of a rotating wheel due to backward flowing wind, prolong the service life of the rotating wheel and avoid economic loss caused by replacing the rotating wheel.

As the conception, the technical scheme adopted by the invention is as follows:

an exhaust treatment system comprising:

the paint spraying chamber is characterized in that an air inlet is formed in a first side wall of the paint spraying chamber, an air outlet is formed in a second side wall of the paint spraying chamber, and the second side wall is opposite to the first side wall;

the waste gas treatment device comprises a box body positioned in the spray chamber, and a filtering assembly and a rotating wheel which are respectively positioned in the box body, wherein the box body is provided with an inlet and an outlet;

the backflow filtering device comprises a horizontal driving piece arranged at the bottom of the spray booth, a vertical driving piece connected to the driving end of the horizontal driving piece, a filtering box connected to the driving end of the vertical driving piece, and a filter arranged in the filtering box, wherein the filtering box is positioned between the box body and the second side wall, and is provided with a second opening;

and the controller is electrically connected with the horizontal driving piece and the vertical driving piece and is used for controlling the horizontal driving piece and the vertical driving piece to act to drive the filter box to a preset position when the exhaust gas treatment device in the spray booth is determined to be stopped or the filter assembly needs to be replaced, and when the filter box is positioned at the preset position, the second opening is in butt joint with the air outlet so that the backward flowing air entering from the air outlet enters the filter box through the second opening and is filtered by the filter.

Optionally, the bottom end of the third side wall of the filter box is further provided with a first opening, the first opening is used for being communicated with the box outlet, the second opening is formed in the middle of the fourth side wall of the filter box, and the fourth side wall is opposite to the third side wall.

Optionally, the filter box is square, the filters are multiple, the filters are arranged in an array along the width direction and the height direction of the filter box, and the third side wall and the fourth side wall are opposite to each other in the length direction of the filter box.

Optionally, the filter box further comprises an access door, wherein the access door is mounted on the side wall of the filter box.

Optionally, the inspection device further comprises a detector mounted on the access door and an illuminating lamp located in the filter box, the detector and the illuminating lamp are connected to the controller, the detector is used for detecting whether the access door is opened, and the controller is further used for controlling the illuminating lamp to emit light when the access door is opened according to a detection signal of the detector.

Optionally, still including being located maintenance cat ladder in the rose box and being fixed in maintenance platform on the rose box lateral wall, through the maintenance cat ladder can move to on the maintenance platform.

Optionally, the backflow filtering device further comprises a frame structure, the frame structure is provided with a plurality of mounting ports, the plurality of filters correspond to the plurality of mounting ports one to one, and the filters are mounted on the corresponding mounting ports.

Optionally, still include be located the water collector of rose box bottom, set up in the mouth that congeals water of rose box, and install in congeal the water valve on the mouth of a river, the water collector is used for holding and connects the comdenstion water on the rose box inner wall, congeal the water mouth communicate in the water collector, congeal the water valve connect in the controller, the controller still is used for controlling congeal the switch of water valve.

Optionally, the filter assembly comprises a first filter, a second filter, a third filter and a fourth filter, and the first filter is a G4 filter, the second filter is a F5 filter, the third filter is a F7 filter, and the fourth filter is a F9 filter.

A control method of an exhaust gas treatment system for controlling the exhaust gas treatment system, comprising the steps of:

s1, judging whether the waste gas treatment device in the spray booth is stopped or not, or judging whether a filter assembly in the waste gas filter device needs to be replaced or not, if so, executing a step S2; if not, go to step S4;

s2, controlling the horizontal driving piece to start to drive the filter box to move in the horizontal direction, and controlling the horizontal driving piece to close when the projection of the center of the second opening of the filter box on the second side wall of the paint spraying chamber and the center of the air outlet of the paint spraying chamber are positioned on the same vertical line;

s3, controlling a vertical driving piece to be started to drive the filter box to move in the vertical direction, and controlling the vertical driving piece to be closed when the filter box is located at a preset position;

and S4, controlling the filter box to be static.

The waste gas treatment system and the control method thereof provided by the invention at least have the following beneficial effects:

through set up filtering device that flows backward in the paint spray booth, and the second opening of rose box can dock with the air outlet of paint spray booth, when exhaust treatment device shut down or need to change filtering component, horizontal driving piece of controller control and vertical driving piece action, in order to remove rose box and filter to predetermineeing the position, make the downdraught that gets into by the air outlet can all get into in the rose box, and filtered by the filter, the filter can effectively filter the paint granule in the downdraught, make to have few paint granule or even do not have paint granule in the downdraught that gets into in the box, and then can not cause the pollution to the runner, the probability that the runner appears blockking up and potential safety hazard because of the downdraught has been reduced, the life of runner has been prolonged, the economic loss who has avoided producing because of changing the runner.

And, through horizontal driving piece and vertical driving piece drive rose box removal, saved the manpower, improved the efficiency that the rose box removed, when needing the filter to filter the flowing backward wind, remove the rose box to preset the position, when not needing the filter, shift out the rose box and preset the position for the position of rose box can be more nimble.

Drawings

FIG. 1 is a schematic distribution diagram of an exhaust treatment system provided by an embodiment of the present invention;

FIG. 2 is a front view of a reverse flow filter arrangement according to an embodiment of the present invention;

FIG. 3 is a top view of a reverse flow filter apparatus according to an embodiment of the present invention;

fig. 4 is a flowchart of a control method of an exhaust gas treatment system according to an embodiment of the present invention.

In the figure:

1. a paint spray booth; 11. an air inlet; 12. an air outlet; 2. an exhaust gas treatment device; 21. a rotating wheel; 221. a first stage filter; 222. a second stage filter; 223. a third stage filter; 224. a fourth stage filter; 3. a reverse flow filtration device; 31. a filter box; 311. a condensate outlet; 32. a filter; 301. a first opening; 302. a second opening; 4. an access door; 5. overhauling a slide; 6. overhauling the platform; 7. a pressure sensor; 8. a junction box.

Detailed Description

In order to make the technical problems solved, the technical solutions adopted and the technical effects achieved by the present invention clearer, the technical solutions of the present invention are further described below by way of specific embodiments with reference to the accompanying drawings. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not limiting of the invention. It should be further noted that, for the convenience of description, only some but not all of the elements associated with the present invention are shown in the drawings.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present invention, it should be noted that unless otherwise explicitly stated or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection or a removable connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

The embodiment provides a waste gas treatment system, can filter the paint granule in the wind of flowing backward when equipment trouble or change filtering component, has prevented the pollution of the wind of flowing backward to the runner, has improved the life of runner.

As shown in fig. 1 to 3, the exhaust gas treatment system includes a spray booth 1, an exhaust gas treatment device 2, a backflow filtering device 3, and a controller.

The paint spraying chamber 1 is provided with a first side wall and a second side wall which are opposite to each other, wherein an air inlet 11 is formed in the first side wall, so that outside air can enter the paint spraying chamber 1 through the air inlet 11, and an air outlet 12 is formed in the second side wall, so that air in the paint spraying chamber 1 can flow out.

The exhaust gas treatment device 2 comprises a box body positioned in the spray booth 1, and a filtering assembly and a rotating wheel 21 which are respectively positioned in the box body. Wherein, the box has the entry and the export of intercommunication spray booth 1 for in the paint spray booth 1 paint mist waste gas can the entering box, filter assembly is used for carrying out filtration treatment to the paint mist waste gas that gets into in the box, with the granule such as the volatile organic compounds of getting rid of in the paint mist waste gas, runner 21 is arranged in adsorbing the Volatile Organic Compounds (VOC) in the waste gas.

The filtering device 3 comprises a horizontal driving piece arranged at the bottom of the spray booth 1, a vertical driving piece connected to the driving end of the horizontal driving piece, a filter box 31 connected to the driving end of the vertical driving piece, and a filter 32 arranged in the filter box 31. The horizontal driving member can drive the filter box 31 to move in the horizontal direction through the vertical driving member, and the vertical driving member can drive the filter box 31 to move in the vertical direction. As shown in fig. 1, the filter tank 31 is located between the tank body and the second sidewall, and as shown in fig. 2, the filter tank 31 has a first opening 301 and a second opening 302.

The controller in this embodiment is electrically connected to the horizontal driving member and the vertical driving member, and is configured to control the horizontal driving member and the vertical driving member to operate when it is determined that the exhaust gas treatment device 2 in the spray booth 1 is stopped or a filter assembly in the cabinet needs to be replaced, so as to drive the filter box 31 to a preset position through the horizontal driving member and the vertical driving member, and when the filter box 31 is located at the preset position, the first opening 301 is communicated with an outlet of the cabinet, and the second opening 302 is in butt joint with the air outlet 12, so that the backward air enters the filter box 31 from the air outlet 12 through the second opening 302, and is filtered by the filter 32.

In the exhaust gas treatment system provided in this embodiment, by disposing the backward flow filtering device 3 in the painting chamber 1, and the second opening 301 of the filtering box 31 can be abutted with the air outlet 12 of the painting chamber 1, when the waste gas treatment device 2 is stopped or the filter component needs to be replaced, the controller controls the horizontal driving piece and the vertical driving piece to act, so as to move the filter box 31 and the filter 32 to a predetermined position, so that the backward wind entering from the wind outlet 12 can completely enter the filter box 31, and is filtered by the filter 32, the filter 32 can effectively filter paint particles in the backward flowing wind, so that little paint particles or even no paint particles exist in the backward wind entering the box body, and further, the rotating wheel 21 is not polluted, the probability of blockage and potential safety hazard of the rotating wheel 21 due to backward flowing wind is reduced, the service life of the rotating wheel 21 is prolonged, and the economic loss caused by replacing the rotating wheel 21 is avoided.

And, through horizontal driving piece and the removal of vertical driving piece drive rose box 31, saved the manpower, improved the efficiency that rose box 31 removed, when needing filter 32 to filter the downdraught, remove rose box 31 to preset the position, when not needing filter 32, shift out rose box 31 and preset the position for the position of rose box 31 can be more nimble.

Optionally, the filter 32 in this embodiment may be a plate filter, and the filtering accuracy is G4 grade, and the plate filter with G4 grade accuracy has the characteristics of small wind resistance and small occupied area, and can effectively reduce the equipment investment cost and the operation cost. For example, as shown in fig. 2, a pressure sensor 7 is further installed in the filter box 31, and the pressure sensor 7 is used for detecting the pressure of the backward wind in the filter box 31, so that the pressure difference before and after the backward wind passes through the filter 32 can be obtained.

The filter assembly comprises a first-stage filter 221, a second-stage filter 222, a third-stage filter 223 and a fourth-stage filter 224, wherein the first-stage filter 221 is a G4 filter, and theoretically, the filtering efficiency of particles with the particle size of 5 microns or more can be guaranteed to be larger than 84.5%; the second stage filter 222 is an F5 filter, which theoretically can ensure that the filtering efficiency of particles with the particle size of 5 microns or more is more than 85%; the third filter 223 is an F7 filter, which theoretically can ensure that the filtering efficiency of particles with the particle size of 0.4 micron or more is more than 85 percent; the fourth filter 224 is an F9 filter, which theoretically ensures a filtration efficiency of particles of 0.4 micron size and above of greater than 97%. Through the combined configuration of different filter efficiencies, paint particles in the paint mist waste gas can be guaranteed to be effectively intercepted, and therefore the rotating wheel 21 is protected.

In the present embodiment, as shown in fig. 2 and 3, the filter box 31 is square, and at this time, the filter box 31 has a length, a width and a height, and in order to increase the filtering area of the filter 32 and facilitate the installation of the filter 32, as shown in fig. 2, a plurality of filters 32 are provided, the plurality of filters 32 are arranged in an array along the width direction and the height direction of the filter box 31, and the arranged plurality of filters 32 form a filter wall, the filter wall is parallel to the first side wall and the second side wall, and the edge of the filter wall is in sealing contact with the inner wall of the spray booth 1, so as to prevent the backward wind from flowing into the runner 21 without being filtered.

Further, when the filter 32 is provided in plurality, the plurality of filters 32 are fixed to a frame structure in the filter box 31, and specifically, the frame structure has a plurality of mounting ports, the plurality of filters 32 correspond to the plurality of mounting ports one to one, and the filters 32 are mounted to their corresponding mounting ports, so that the plurality of filters 32 can be independent of each other and fixed respectively.

Referring to fig. 2, the first opening 301 is disposed at the bottom end of the third sidewall of the filter box 31, so that the first opening 301 is communicated with the outlet of the box body. And, the second opening 302 is disposed in the middle of the fourth side wall of the filter box 31 to facilitate the connection with the outlet 12. Wherein, the third side wall and the fourth side wall are opposite to each other in the length direction of the filter box 31. Optionally, in this embodiment, a docking detector is disposed at the second opening 302 or the air outlet 12, and the docking detector is configured to detect whether the second opening 302 is docked with the air outlet 12, and send a detection signal to the controller, so that the controller continues to control the horizontal driving element and the vertical driving element according to the detection signal. For example, both the horizontal drive and the vertical drive may be pneumatic cylinders.

As shown in fig. 2, the exhaust gas treatment system further includes an access door 4, an opening is provided on a side wall of the filter box 31, the access door 4 is installed on the opening of the side wall, and an operator can enter the filter box 31 through the access door 4 to repair, maintain and replace the filter 31 for the components in the filter box 31. In this embodiment, the access door 4 may be an electrically controlled door controlled by a controller, and when the controller determines that the components in the filter box 31 are damaged or the filter 31 needs to be replaced, the access door 4 may be remotely controlled to be automatically opened.

Further, the exhaust gas treatment system further includes a detector mounted on the access door 4 and an illumination lamp located in the filter box 31. Wherein, detector and light all electricity are connected in the controller, and the detector is used for detecting whether access door 4 opens, and the controller still is used for when confirming access door 4 opens according to the detected signal of detector, and the control light is luminous for when access door 4 opened, the illumination lamp in the rose box 31 can be luminous, so that operating personnel walks safely in rose box 31. For example, the detector in the present embodiment may be an infrared sensor, and the illumination lamp is electrically connected to an external power source through a junction box 8 disposed on a sidewall of the filter box 31.

Still further, exhaust-gas treatment system still includes the maintenance cat ladder 5 that is located the rose box 31 and is fixed in maintenance platform 6 on the rose box 31 lateral wall, and operating personnel gets into in the rose box 31 back from access door 4, when overhauing the position higher, can climb to the target position through maintenance cat ladder 5, perhaps removes to maintenance platform 6 by maintenance cat ladder 5 on to realize the maintenance or the change to the part on maintenance platform 6.

In this embodiment, as shown in fig. 3, the exhaust gas treatment system further includes a water pan located at the bottom of the filtering tank 31, a water condensation port 311 disposed on the filtering tank 31, and a water condensation valve installed on the water condensation port 311. The water receiving tray is used for containing and receiving condensed water on the inner walls of the filter 32 and the filter box 31, the water condensation port 311 is communicated with the water receiving tray and used for discharging the condensed water, the water condensation valve is connected to the controller, a liquid level sensor is arranged in the water receiving tray, the controller is connected to the liquid level sensor, and when the liquid level detected by the liquid level sensor reaches a preset value, the water condensation valve is controlled to be opened so that the condensed water in the water receiving tray flows out from the water condensation port 311. Alternatively, to facilitate the collection of the condensate, the top wall of the filter tank may be a sloped wall.

Optionally, the exhaust gas treatment system further comprises an exhaust fan disposed between the exhaust gas treatment device 2 and the painting device, or the exhaust fan is disposed between the exhaust gas treatment device 2 and the backflow filtering device, for driving fluid through the exhaust gas treatment device 2. The exhaust fan is connected to the controller, which is also configured to control the exhaust fan to be turned off when it is determined that the exhaust gas treatment device 2 is stopped.

The present embodiment also provides a control method of an exhaust gas treatment system, which is executed by a controller and is used for controlling the exhaust gas treatment system, as shown in fig. 4, and the control method of the exhaust gas treatment system includes the steps of:

s1, judging whether the waste gas treatment device 2 in the spray booth is stopped or not, or judging whether a filter assembly in the waste gas filter device 2 needs to be replaced or not, if so, executing a step S2; if not, step S4 is executed.

When the controller determines that the exhaust gas treatment device 2 in the painting booth 1 has been stopped or determines that there is a filter assembly in the exhaust gas filter device 2 that needs to be replaced, step S2 is performed, otherwise, step S4 is performed.

And S2, controlling the horizontal driving piece to start to drive the filter box 31 to move in the horizontal direction, and controlling the horizontal driving piece to close when the projection of the center of the second opening 302 of the filter box 31 on the second side wall of the paint spraying chamber 1 is positioned on the same vertical line with the center of the air outlet 12 of the paint spraying chamber 1.

The projection of the center of the second opening 302 of the filter box 31 on the second side wall of the paint spray booth 1 and the center of the air outlet 12 of the paint spray booth 1 are located on the same vertical line, which means that the center of the second opening 302 and the center of the air outlet 12 are located in the same predetermined vertical plane, which is perpendicular to the horizontal plane and perpendicular to the first side wall or the second side wall. The controller controls the horizontal driving member to start, so that the driving end of the horizontal driving member drives the vertical driving member and the filter box 31 to move in the horizontal direction. In this embodiment, the horizontal drive is fixed to the bottom wall of the spray booth 1.

And S3, controlling the vertical driving piece to be started to drive the filter box 31 to move in the vertical direction, and controlling the vertical driving piece to be closed when the filter box 31 is positioned at the preset position.

The second outlet 302 is capable of interfacing with the outlet mouth 12 when the filter box 31 is in a predetermined position. Alternatively, the output end of the vertical drive may be connected to a plate, to which the filter box 31 is fixed.

And S4, controlling the filter tank 31 to be static.

The controller controls the horizontal driving piece and the vertical driving piece to be forbidden to start so as to ensure that the filter box 31 is static.

In the control method of the exhaust gas treatment system provided by this embodiment, by disposing the backward flow filtering device 3 in the painting chamber 1, and the second opening 301 of the filtering box 31 can be abutted with the air outlet 12 of the painting chamber 1, when the waste gas treatment device 2 is stopped or the filter component needs to be replaced, the controller controls the horizontal driving piece and the vertical driving piece to act, so as to move the filter box 31 and the filter 32 to a predetermined position, so that the backward wind entering from the wind outlet 12 can completely enter the filter box 31, and is filtered by the filter 32, the filter 32 can effectively filter paint particles in the backward flowing wind, so that little paint particles or even no paint particles exist in the backward wind entering the box body, and further, the rotating wheel 21 is not polluted, the probability of blockage and potential safety hazard of the rotating wheel 21 due to backward flowing wind is reduced, the service life of the rotating wheel 21 is prolonged, and the economic loss caused by replacing the rotating wheel 21 is avoided.

The foregoing embodiments are merely illustrative of the principles and features of this invention, which is not limited to the above-described embodiments, but rather is susceptible to various changes and modifications without departing from the spirit and scope of the invention, which changes and modifications are within the scope of the invention as claimed. The scope of the invention is defined by the appended claims and equivalents thereof.

Claims (10)

1. An exhaust treatment system, comprising:

the air-conditioning system comprises a paint spraying chamber (1), wherein an air inlet (11) is formed in a first side wall of the paint spraying chamber (1), an air outlet (12) is formed in a second side wall of the paint spraying chamber, and the second side wall is opposite to the first side wall;

the waste gas treatment device (2) comprises a box body positioned in the spray booth (1), and a filtering assembly and a rotating wheel (21) which are respectively positioned in the box body, wherein the box body is provided with an inlet and an outlet;

the backflow filtering device (3) comprises a horizontal driving piece arranged at the bottom of the spray booth (1), a vertical driving piece connected to the driving end of the horizontal driving piece, a filtering box (31) connected to the driving end of the vertical driving piece, and a filter (32) installed in the filtering box (31), wherein the filtering box (31) is located between the box body and the second side wall, and the filtering box (31) is provided with a second opening (302);

and the controller is electrically connected with the horizontal driving piece and the vertical driving piece and is used for controlling the horizontal driving piece and the vertical driving piece to act to drive the filter box (31) to a preset position when the waste gas treatment device (2) in the spray booth (1) is determined to be stopped or the filter assembly needs to be replaced, and when the filter box (31) is located at the preset position, the second opening (302) is in butt joint with the air outlet (12) so that the backflow air entering from the air outlet (12) enters the filter box (31) through the second opening (302) and is filtered by the filter (32).

2. An exhaust gas treatment system according to claim 1, wherein the bottom end of the third side wall of the filter box (31) is further provided with a first opening (301), the first opening (301) being adapted to communicate with the box outlet, the second opening (302) being provided in the middle of a fourth side wall of the filter box (31), the fourth side wall being opposite to the third side wall.

3. An exhaust gas treatment system according to claim 2, wherein the filter tank (31) has a square shape, and the filter (32) is provided in plurality, and the plurality of filters (32) are arranged in an array in a width direction and a height direction of the filter tank (31), and the third side wall and the fourth side wall are opposed to each other in a length direction of the filter tank (31).

4. An exhaust gas treatment system according to claim 2, further comprising an access door (4), the access door (4) being mounted to a side wall of the filter box (31).

5. The exhaust gas treatment system of claim 4, further comprising a detector mounted on the access door (4) and an illuminating lamp located in the filter box (31), wherein the detector and the illuminating lamp are both connected to the controller, the detector is used for detecting whether the access door (4) is opened, and the controller is further used for controlling the illuminating lamp to emit light when the access door (4) is opened according to a detection signal of the detector.

6. An effluent treatment system as claimed in claim 5 further comprising a service ladder (5) located within the filter box (31) and a service platform (6) secured to a side wall of the filter box (31) such that an operator can move onto the service platform (6) through the service ladder (5).

7. An exhaust treatment system according to claim 2, wherein the reverse flow filter arrangement (3) further comprises a frame structure having a plurality of mounting openings, a plurality of filters (32) corresponding one to the plurality of mounting openings, and the filters (32) being mounted on their corresponding mounting openings.

8. The exhaust gas treatment system of claim 1, further comprising a water pan at the bottom of the filter box (31), a water condensation port (311) provided in the filter box (31), and a water condensation valve installed on the water condensation port (311), wherein the water pan is configured to receive condensed water on an inner wall of the filter box (31), the water condensation port (311) is communicated with the water pan, the water condensation valve is connected to the controller, and the controller is further configured to control the on/off of the water condensation valve.

9. The exhaust treatment system of claim 1, wherein the filter assembly includes a first filter (221), a second filter (222), a third filter (223), and a fourth filter (224), and wherein the first filter (221) is a G4 filter, the second filter (222) is a F5 filter, the third filter (223) is a F7 filter, and the fourth filter (224) is a F9 filter.

10. A control method of an exhaust gas treatment system for controlling the exhaust gas treatment system according to any one of claims 1 to 9, characterized by comprising the steps of:

s1, judging whether the waste gas treatment device in the spray booth is stopped or not, or judging whether a filter assembly in the waste gas filter device needs to be replaced or not, if so, executing a step S2; if not, go to step S4;

s2, controlling a horizontal driving piece to start so as to drive a filter box to move in the horizontal direction, and controlling the horizontal driving piece to close when the projection of the center of a second opening of the filter box on the second side wall of the paint spraying chamber and the center of an air outlet of the paint spraying chamber are positioned on the same vertical line;

s3, controlling a vertical driving piece to be started to drive the filter box to move in the vertical direction, and controlling the vertical driving piece to be closed when the filter box is located at a preset position;

and S4, controlling the filter box to be static.

Images