A waste gas treatment device for electrophoretic coating production

Abstract

This invention belongs to the field of industrial waste gas purification and treatment technology, specifically a waste gas treatment device for electrophoretic coating production. Addressing the lack of multi-dimensional online monitoring, intelligent judgment, and feedback control in existing electrophoretic coating production waste gas treatment devices, this invention proposes the following solution: It includes a main housing, a detection housing, and a negative pressure housing, all integrated into a single structure. An air inlet square pipe is fixed to the side wall of the main housing. Waste gas treatment components are installed inside the main housing, and a particulate matter detection component is installed inside the detection housing. This invention, through its built-in particulate matter detection module, waste gas concentration detection module, and data processing module, constructs a particulate matter change coefficient F and a concentration change coefficient P, further weighting and fusing them into a comprehensive judgment coefficient S. This enables automatic and accurate determination of whether emissions meet standards, and provides intuitive and timely feedback on the equipment's operating status via a three-color indicator light.

Description

Technical Field

[0001] This invention relates to the field of industrial waste gas purification and treatment technology, and in particular to a waste gas treatment device for electrophoretic coating production. Background Technology

[0002] Electrophoretic coatings, also known as electrophoretic paints, are water-based coatings widely used in automobiles, home appliances, hardware, and other fields. During their production, processes such as feeding, dispersion, grinding, and blending generate a large amount of waste gas. This waste gas is characterized by its complex composition, high humidity, and the presence of a large number of resin droplets and volatile organic solvents, such as ketones, alcohols, and esters. If it is discharged directly without effective treatment, it will not only pollute the atmospheric environment but may also endanger the health of operators and even cause safety hazards due to the accumulation of organic matter.

[0003] For example, Chinese patent document CN220110732U discloses a tail gas treatment device for a paint production workshop, including a main body box with a base fixed to the bottom. When using this tail gas treatment device, after connecting the left side of the connecting pipe to the workshop's exhaust pipe, the inside of the main body box can be drawn to a negative pressure state by controlling the exhaust fan. Then, the exhaust gas from the workshop is extracted through the connecting pipe. As the exhaust gas passes through the treatment box, an air filter inside the treatment box can assist in filtering and removing some solid dust particles contained in the exhaust gas. The above-disclosed technology has the following problems: lack of real-time, multi-dimensional online monitoring capabilities: most existing devices only focus on the final emission after waste gas treatment, lacking continuous online monitoring of key parameters during the treatment process, such as particulate matter concentration and organic waste gas concentration. This makes it impossible to grasp the equipment's operating status in real time. Once the treatment efficiency declines, it is often only discovered after emissions exceed the standard, resulting in regulatory lag. Existing technologies do not easily solve this problem. Therefore, there is an urgent need for a tail gas treatment device for electrophoretic paint production to solve the above problems. Summary of the Invention

[0004] To address the technical problem that existing waste gas treatment devices for electrophoretic coating production lack multi-dimensional online monitoring, intelligent judgment, and feedback control, this invention proposes a waste gas treatment device for electrophoretic coating production.

[0005] This invention proposes a waste gas treatment device for electrophoretic coating production, comprising a main assembly, which includes a main housing, a detection housing, and a negative pressure housing, all of which are integrally formed. An air inlet square pipe is fixed to the side wall of the main housing. A waste gas treatment component is installed inside the main housing. A particulate matter detection component, including a laser sensor, is installed inside the detection housing. A waste gas concentration detection component, including a differential pressure sensor, is installed at the top center of the main housing. A negative pressure fan assembly is installed inside the negative pressure housing. A control panel is installed on the side wall of the main housing, containing a processor and indicator lights. The processor includes a particulate matter detection module, a waste gas concentration detection module, and a data processing module.

[0006] Preferably, the negative pressure fan assembly includes a bracket fixed inside the negative pressure box, a drive fan fixed to the top of the bracket, a fan blade fixed to the output shaft of the drive fan, and the negative pressure fan assembly exhausts air towards the top.

[0007] Preferably, the exhaust gas treatment component is located at the bottom of the main housing and includes a bottom partition and a top partition. The bottom partition is welded and fixed to the bottom of the main housing, and the top partition is welded and fixed to the side wall of the main housing. The welding position of the side wall of the top partition is higher than the welding position of the air inlet square pipe.

[0008] Preferably, the bottom partition, the top partition, and the bottom of the main housing form an exhaust gas treatment channel. A filter cartridge housing is welded and fixed inside the main housing at the exhaust position of the exhaust gas treatment channel. A filter cartridge is installed inside the filter cartridge housing. The filter cartridge is used to filter residual particulate matter and moisture in the exhaust gas.

[0009] Preferably, the exhaust gas particulate matter detection module includes a detection frame fixed inside the detection chamber, and the laser detection components are installed on both sides of the detection frame. The laser detection components are provided in three sets, and each laser detection component includes a laser sensor and a laser sensor receiver, which are respectively installed on both sides of the detection frame.

[0010] Preferably, the exhaust gas concentration detection component includes a detection cylinder with a detection chamber inside. A mounting plate is fixed to one end of the detection cylinder, and two first electric push rods are fixed to the side wall of the mounting plate. A filter membrane frame is fixed to the output end of the two first electric push rods, and a filter membrane is fixed to the middle of the filter membrane frame.

[0011] Preferably, a rectangular slot is provided in the middle of the detection cylinder, and a sealing arc plate is slidably installed inside the rectangular slot. The sealing arc plate is used to seal the rectangular slot. The sliding of the sealing arc plate is controlled by a second electric push rod, which is installed inside the detection cylinder. The differential pressure sensor is fixed in the middle of the mounting plate.

[0012] The exhaust gas particulate matter detection module is used to receive data from the laser sensor component, analyze and process the received data, and generate a particulate matter variation coefficient F. The value of the particulate matter variation coefficient F reflects the content of particulate matter in the exhaust gas after exhaust gas treatment. The smaller the particulate matter variation coefficient F, the lower the particulate matter content in the exhaust gas after exhaust gas treatment; the larger the particulate matter variation coefficient F, the higher the particulate matter content in the exhaust gas after exhaust gas treatment.

[0013] The exhaust gas concentration detection module is used to receive the detection data from the differential pressure sensor, analyze and process the received detection data, and generate a concentration change coefficient P. The value of the concentration change coefficient P is the content of the substance in the exhaust gas after exhaust gas treatment. The smaller the concentration change coefficient P, the lower the substance concentration in the exhaust gas after exhaust gas treatment; the larger the concentration change coefficient P, the higher the substance concentration in the exhaust gas after exhaust gas treatment.

[0014] Data processing module: Communicates with the exhaust gas particulate matter detection module and the exhaust gas concentration detection module, and acquires the particulate matter change coefficient F and concentration change coefficient P in real time. It performs a weighted calculation on the obtained particulate matter change coefficient F and concentration change coefficient P to obtain the judgment coefficient S. The processor compares the generated judgment coefficient S with the set threshold S1 and controls the indicator light.

[0015] The beneficial effects of this invention are as follows: This waste gas treatment device for electrophoretic coating production, through its built-in waste gas particulate matter detection module, waste gas concentration detection module, and data processing module, goes beyond mere data collection and display. Instead, it enables in-depth analysis of the collected data. By constructing particulate matter variation coefficient F and concentration variation coefficient P, and further weighting and integrating them into a comprehensive judgment coefficient S, a scientific evaluation system is formed. This system can automatically and accurately determine whether emissions meet standards and provides intuitive and timely feedback on the equipment's operating status through a three-color indicator light, achieving an intelligent upgrade from "passive emission detection" to "active process monitoring and early warning."

[0016] This invention is the first to integrate a particulate matter detection component based on the laser beam principle and a waste gas concentration detection component based on the filter membrane pressure difference principle into the same device. These two independent and complementary detection systems can simultaneously monitor the content of solid / liquid particulate matter and the concentration of gaseous pollutants, especially VOCs, in the treated exhaust gas in real time and continuously. This overcomes the shortcomings of traditional devices with only one detection dimension and provides a reliable data basis for comprehensively evaluating the waste gas treatment effect.

[0017] This waste gas treatment device for electrophoretic coating production forms a meandering waste gas treatment channel by setting bottom and top baffles, which effectively extends the contact time between waste gas and treatment components and clean water treatment process. It also utilizes the principle of gravity settling to allow large particles to fall naturally. Combined with multi-layer composite filter elements, it can efficiently remove resin droplets, dust and water vapor from waste gas, providing a clean gas environment for subsequent precision testing. At the same time, it protects the testing components from contamination and extends the equipment life. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the overall structure of a waste gas treatment device for electrophoretic coating production proposed in this invention; Figure 2 This is a side sectional view of the overall structure of a waste gas treatment device for electrophoretic coating production proposed in this invention. Figure 3 This is a schematic diagram of the particulate matter detection component in an exhaust gas treatment device for electrophoretic coating production proposed in this invention. Figure 4 This is a partial structural schematic diagram of the particulate matter detection component of an exhaust gas treatment device for electrophoretic coating production proposed in this invention. Figure 5 This is a schematic diagram of the waste gas concentration detection component of a waste gas treatment device for electrophoretic coating production proposed in this invention; Figure 6 This is a partial structural diagram of a differential pressure sensor for an exhaust gas treatment device used in electrophoretic coating production, as proposed in this invention. Figure 7 This is a schematic diagram illustrating the working principle of a waste gas treatment device for electrophoretic coating production proposed in this invention.

[0019] In the picture: 100. Main components; 101. Main housing; 102. Detection housing; 103. Negative pressure housing; 104. Air inlet square pipe; 200. Negative pressure fan assembly; 201. Drive fan; 202. Fan blades; 300. Exhaust gas treatment assembly; 301. Bottom partition; 302. Top partition; 303. Filter cartridge housing; 304. Filter cartridge; 305. Exhaust gas treatment channel; 400. Particulate matter detection component; 401. Detection frame; 402. Laser sensor; 403. Laser sensor receiver; 500. Exhaust gas concentration detection component; 501. Detection cylinder; 502. Detection chamber; 503. Sealing arc plate; 504. Mounting plate; 505. Electric push rod; 506. Filter membrane frame; 507. Filter membrane; 508. Differential pressure sensor. Detailed Implementation

[0020] Reference Figures 1-6 A waste gas treatment device for electrophoretic coating production includes a main component 100, which includes a main housing 101, a detection housing 102, and a negative pressure housing 103. The main housing 101, detection housing 102, and negative pressure housing 103 are integrated into one structure. An air inlet square pipe 104 is fixed to the side wall of the main housing 101. A waste gas treatment component 300 is installed inside the main housing 101. A waste gas particulate matter detection component 400 is installed inside the detection housing 102. The waste gas particulate matter detection component 400 includes a laser sensor component. A waste gas concentration detection component 500 is installed at the top center of the main housing 101. The waste gas concentration detection component 500 includes a differential pressure sensor 508. A negative pressure fan component 200 is installed inside the negative pressure housing 103. A control panel is installed on the side wall of the main housing 101. The control panel is equipped with a processor and indicator lights. The processor is equipped with a waste gas particulate matter detection module, a waste gas concentration detection module, and a data processing module.

[0021] Continue to refer to Figure 1 and Figure 2 Furthermore, the negative pressure fan assembly 200 includes a bracket fixed inside the negative pressure box 103, a drive fan 201 fixed on the top of the bracket, and a fan blade 202 fixed on the output shaft of the drive fan 201. The negative pressure fan assembly 200 exhausts air towards the top. The drive fan 201 is a variable frequency speed control fan, which can adaptively adjust the speed according to the concentration of exhaust gas to adapt to different exhaust gas emission volumes. The fan blade 202 adopts a large arc curved surface design, which has a large air volume, low wind resistance, and low operating noise.

[0022] Reference Figure 2Furthermore, the exhaust gas treatment component 300 is located at the bottom of the main housing 101, including a bottom partition 301 and a top partition 302. The bottom partition 301 is welded and fixed to the bottom of the main housing 101. The bottom partition 301 is continuously welded to the inner walls of the front, rear, left, and right sides of the main housing 101 to achieve airtightness. The top partition 302 is welded and fixed to the side wall of the main housing 101, and the welding position of the side wall of the top partition 302 is higher than the welding position of the air inlet square pipe 104. The purpose of this design is that when the exhaust gas enters the main housing 101 at high speed from the air inlet square pipe 104, it cannot escape directly upwards, but must flow downwards. The bottom of the main housing 101 is filled with clean water, which can reduce the temperature of the exhaust gas when it passes through, and can effectively adsorb the dust in the exhaust gas.

[0023] Furthermore, through the above structure, the bottom partition 301, the top partition 302, and the bottom of the main housing 101 form an exhaust gas treatment channel 305. Inside the main housing 101, at the exhaust position of the exhaust gas treatment channel 305, a filter cartridge housing 303 is welded and fixed. Inside the filter cartridge housing 303, a filter element 304 is installed. The filter element 304 is used to filter residual particulate matter and moisture in the exhaust gas. The filter element 304 consists of a three-layer structure: the outermost layer is a G3 grade primary filter cotton for intercepting large dust particles and resin droplets; the middle layer is an F7 grade bag filter for efficiently capturing submicron-sized particles; and the innermost layer is a polyester fiber dewatering filter for removing water mist entrained in the gas.

[0024] Reference Figure 3 and Figure 4 Furthermore, the exhaust gas particulate matter detection module 400 includes a detection frame 401 fixed inside the detection housing 102. Laser detection components are installed on both sides of the detection frame 401. There are three sets of laser detection components. Each laser detection component includes a laser sensor 402 and a laser sensor receiver 403. The laser sensor 402 and the laser sensor receiver 403 are respectively installed on both sides of the detection frame 401. The laser sensor 402 is installed on the left inner wall with its emission port facing the right. The laser sensor receiver 403 is precisely installed at the corresponding position on the right inner wall with its receiving window facing the emission port of the laser sensor 402.

[0025] Reference Figure 5 and Figure 6Furthermore, the exhaust gas concentration detection component 500 includes a detection cylinder 501, with a detection chamber 502 inside the detection cylinder 501. A mounting plate 504 is fixed at one end of the detection cylinder 501, and two first electric push rods 505 are fixed to the side wall of the mounting plate 504. A filter membrane frame 506 is fixed to the output end of the two first electric push rods 505, and a filter membrane 507 is fixed in the middle of the filter membrane frame 506. The filter membrane 507 is made of polytetrafluoroethylene (PTFE), which has good adsorption properties for non-polar and weakly polar organic gases.

[0026] Furthermore, a rectangular slot is provided in the middle of the detection cylinder 501, and a sealing arc plate 503 is slidably installed inside the rectangular slot. The sealing arc plate 503 is used to seal the rectangular slot. The sliding of the sealing arc plate 503 is controlled by the second electric push rod, which is installed inside the detection cylinder 501. The differential pressure sensor 508 is fixed in the middle of the mounting plate 504, so that the pressure drop generated when the gas flows through the filter membrane 507 can be measured in real time.

[0027] Furthermore, the exhaust gas particulate matter detection module is used to receive data from the laser sensor component, analyze and process the received data, and generate a particulate matter variation coefficient F. The value of the particulate matter variation coefficient F reflects the content of particulate matter in the exhaust gas after exhaust gas treatment. The smaller the particulate matter variation coefficient F, the lower the particulate matter content in the exhaust gas after exhaust gas treatment; the larger the particulate matter variation coefficient F, the higher the particulate matter content in the exhaust gas after exhaust gas treatment.

[0028] The exhaust gas concentration detection module is used to receive the detection data from the differential pressure sensor 508, analyze and process the received detection data, and generate a concentration change coefficient P. The value of the concentration change coefficient P is the content of the substance in the exhaust gas after exhaust gas treatment. The smaller the concentration change coefficient P, the lower the concentration of the substance in the exhaust gas after exhaust gas treatment. The larger the concentration change coefficient P, the higher the concentration of the substance in the exhaust gas after exhaust gas treatment.

[0029] Data processing module: Communicates with the exhaust gas particulate matter detection module and the exhaust gas concentration detection module, and acquires the particulate matter change coefficient F and concentration change coefficient P in real time. It performs a weighted calculation on the obtained particulate matter change coefficient F and concentration change coefficient P to obtain the judgment coefficient S. The processor compares the generated judgment coefficient S with the set threshold S1 and controls the indicator light.

[0030] The weighted formula is: S = α*F + β*P α and β are preset weighting coefficients that can be adjusted according to the electrophoretic exhaust gas treatment standard, and α + β = 1. The comprehensive judgment coefficient S is obtained through weighted calculation. The processor has a preset standard threshold S1. The processor compares the generated judgment coefficient S with the set threshold S1 to control the operation of different color indicator lights. When S < S1, the exhaust emissions are deemed to meet the standards, and the green indicator light remains on. When S=S1, the exhaust gas concentration is determined to be close to the threshold, and the yellow indicator light will remain on as a warning, prompting staff to pay attention to the equipment's operating status. When S > S1, it is determined that the exhaust gas emission exceeds the standard, and the red indicator light flashes to remind the staff to promptly inspect the filter element, clean the sediment at the bottom of the main housing 101, and change the water to check for equipment malfunctions.

[0031] When using this invention: First, the equipment is turned on and debugged. The staff sets the threshold S1 and weighting coefficients α and β through the control panel. After the equipment is started, the drive fan 201 of the negative pressure fan assembly 200 works, driving the fan blades 202 to rotate at high speed, so that a stable negative pressure environment is formed inside the main box 101 and the detection box 102. The exhaust gas generated by the electrophoretic coating production is uniformly drawn into the main box 101 through the air inlet square pipe 104. Clean water is set at the bottom of the main box 101. After the exhaust gas enters the main box 101, it first goes through the clean water for cooling and dust removal.

[0032] In the second step, after the exhaust gas enters the main housing 101, it flows slowly along the bent exhaust gas treatment channel 305 under the limiting action of the top partition 302 and the bottom partition 301, extending the purification contact time with clean water. When the exhaust gas flows through the filter cartridge housing 303, it completes multi-stage purification through the filter cartridge 304. The filter cartridge 304 intercepts large particles of dust and water vapor in the exhaust gas, and at the same time adsorbs some organic VOCs impurities in the exhaust gas, thus completing the deep purification of the exhaust gas.

[0033] Third, the purified exhaust gas continues to flow into the detection chamber 102, and the exhaust gas particulate matter detection component 400 starts working. The three sets of laser sensors 402 simultaneously emit laser beams. After the laser penetrates the exhaust gas, the corresponding laser sensor receiver 403 receives the signal. The detection module collects signal data in real time and calculates and generates the particulate matter change coefficient F. At the same time, the exhaust gas enters the detection chamber 502 of the exhaust gas concentration detection component 500. The second electric push rod drives the sealing arc plate 503 to close, forming a sealed detection space. The first electric push rod 505 pushes the filter membrane frame 506 to move, so that the filter membrane 507 is in the exhaust gas flow path. The exhaust gas passes through the filter membrane 507 and generates a pressure difference. The pressure difference sensor 508 collects the pressure difference data in real time and calculates and generates the concentration change coefficient P.

[0034] The fourth step involves the data processing module acquiring the F and P coefficients in real time, calculating the judgment coefficient S using a weighted algorithm, comparing S with a preset threshold S1, and controlling the indicator light status based on the comparison result to achieve real-time visual feedback on the exhaust gas compliance status. If the equipment operates for a long time and the filter element 304 becomes clogged or fails to adsorb, the exhaust gas purification effect will decrease, the F and P coefficients will increase simultaneously, the judgment coefficient S will exceed the threshold, and the equipment will trigger a red alarm. Staff will then promptly replace the filter element 304 and the clean water in the main housing 101, clean the sludge at the bottom, troubleshoot equipment malfunctions, and ensure that the exhaust gas treatment effect continues to meet the standards.

[0035] The fifth step involves the waste gas, after being tested and confirmed to meet the standards, being stably discharged from the top of the negative pressure box 103 under the action of the negative pressure fan assembly 200, thus completing the entire process of waste gas collection, purification, testing, and emission in compliance with standards.

[0036] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A waste gas treatment device for electrophoretic coating production, comprising a main component (100), characterized in that, The main component (100) includes a main housing (101), a detection housing (102), and a negative pressure housing (103). The main housing (101), the detection housing (102), and the negative pressure housing (103) are an integral structure. An air inlet square pipe (104) is fixed to the side wall of the main housing (101). An exhaust gas treatment component (300) is installed inside the main housing (101), and an exhaust gas particulate matter detection component (400) is installed inside the detection housing (102). (400) includes a laser sensor assembly, and an exhaust gas concentration detection assembly (500) is installed at the top center of the main housing (101). The exhaust gas concentration detection assembly (500) includes a differential pressure sensor (508). A negative pressure fan assembly (200) is installed inside the negative pressure housing (103). A control panel is installed on the side wall of the main housing (101). The control panel is equipped with a processor and indicator lights. The processor is equipped with an exhaust gas particulate matter detection module, an exhaust gas concentration detection module and a data processing module.

2. The waste gas treatment device for electrophoretic coating production according to claim 1, characterized in that, The negative pressure fan assembly (200) includes a bracket fixed inside a negative pressure box (103), a drive fan (201) fixed on the top of the bracket, a fan blade (202) fixed on the output shaft of the drive fan (201), and the negative pressure fan assembly (200) exhausts air towards the top.

3. The waste gas treatment device for electrophoretic coating production according to claim 1, characterized in that, The exhaust gas treatment component (300) is located at the bottom of the main housing (101) and includes a bottom partition (301) and a top partition (302). The bottom partition (301) is welded and fixed to the bottom of the main housing (101), and the top partition (302) is welded and fixed to the side wall of the main housing (101). The welding position of the side wall of the top partition (302) is higher than the welding position of the air inlet square pipe (104).

4. The waste gas treatment device for electrophoretic coating production according to claim 3, characterized in that, The bottom partition (301), the top partition (302) and the bottom of the main box (101) form an exhaust gas treatment channel (305). The main box (101) is welded and fixed to the exhaust position of the exhaust gas treatment channel (305) inside the filter element housing (303). The filter element (304) is installed inside the filter element housing (303). The filter element (304) is used to filter the residual particulate matter and moisture in the exhaust gas.

5. The waste gas treatment device for electrophoretic coating production according to claim 1, characterized in that, The exhaust gas particulate matter detection module (400) includes a detection frame (401) fixed inside the detection box (102). The laser detection components are installed on both sides of the detection frame (401). There are three sets of laser detection components. The laser detection components include a laser sensor (402) and a laser sensor receiver (403). The laser sensor (402) and the laser sensor receiver (403) are respectively installed on both sides of the detection frame (401).

6. The waste gas treatment device for electrophoretic coating production according to claim 1, characterized in that, The exhaust gas concentration detection component (500) includes a detection cylinder (501), and a detection chamber (502) is opened inside the detection cylinder (501). A mounting plate (504) is fixed at one end of the detection cylinder (501). Two first electric push rods (505) are fixed on the side wall of the mounting plate (504). A filter membrane frame (506) is fixed at the output end of the two first electric push rods (505). A filter membrane (507) is fixed at the middle position of the filter membrane frame (506).

7. The waste gas treatment device for electrophoretic coating production according to claim 6, characterized in that, A rectangular slot is provided in the middle of the detection cylinder (501), and a sealing arc plate (503) is slidably installed inside the rectangular slot. The sealing arc plate (503) is used to seal the rectangular slot. The sealing arc plate (503) is slidably controlled to move by a second electric push rod. The second electric push rod is installed inside the detection cylinder (501). The differential pressure sensor (508) is fixed in the middle of the mounting plate (504).

8. The waste gas treatment device for electrophoretic coating production according to claim 1, characterized in that, The exhaust gas particulate matter detection module is used to receive data from the laser sensor component, analyze and process the received data, and generate a particulate matter variation coefficient F. The value of the particulate matter variation coefficient F reflects the content of particulate matter in the exhaust gas after exhaust gas treatment. The smaller the particulate matter variation coefficient F, the lower the particulate matter content in the exhaust gas after exhaust gas treatment; the larger the particulate matter variation coefficient F, the higher the particulate matter content in the exhaust gas after exhaust gas treatment.

9. The waste gas treatment device for electrophoretic coating production according to claim 8, characterized in that, The exhaust gas concentration detection module is used to receive the detection data from the differential pressure sensor (508), analyze and process the received detection data, and generate a concentration change coefficient P. The value of the concentration change coefficient P is the content of the substance in the exhaust gas after exhaust gas treatment. The smaller the concentration change coefficient P, the lower the substance concentration in the exhaust gas after exhaust gas treatment. The larger the concentration change coefficient P, the higher the substance concentration in the exhaust gas after exhaust gas treatment.

10. A waste gas treatment device for electrophoretic coating production according to claim 9, characterized in that, Data processing module: Communicates with the exhaust gas particulate matter detection module and the exhaust gas concentration detection module, and acquires the particulate matter change coefficient F and concentration change coefficient P in real time. It performs a weighted calculation on the obtained particulate matter change coefficient F and concentration change coefficient P to obtain the judgment coefficient S. The processor compares the generated judgment coefficient S with the set threshold S1 and controls the indicator light.

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