A printing machine exhaust treatment device and method

Abstract

The present application relates to the technical field of waste gas treatment, and discloses a printing machine waste gas treatment device and a treatment method, wherein the printing machine waste gas treatment device comprises a flow guide air pipe, an adjusting valve arranged at one end of the flow guide air pipe, and a gas collecting hood arranged at one end of the adjusting valve, further comprising a filter unit arranged in the gas collecting hood, wherein the filter unit comprises a conversion component and a dredging component arranged in the gas collecting hood; by adopting the integrated structure of the cylindrical filter screen, the four-region division, the self-rotation triggered by the pipeline pressure, and the synchronous online cleaning by water flushing, the technical defects that the existing printing machine waste gas preliminary collection filter screen is easy to be blocked and needs to be regularly stopped for maintenance are solved.

Description

Technical Field

[0001] This invention relates to the technical field of waste gas treatment, and in particular to a printing press waste gas treatment device and treatment method. Background Technology

[0002] As core equipment in office and industrial printing, printers generate a large amount of mixed exhaust gas containing ultrafine dust, volatile organic compounds, and ozone during operation. The toner and ink dust emitted from laser printers, digital printers, and other equipment are mostly smaller than 1μm in diameter, exhibiting strong adhesion and easy agglomeration. This type of exhaust gas not only irritates the human respiratory tract and damages lung tissue but also causes air pollution in the workshop, failing to meet environmental emission and production safety requirements. With continuously tightening environmental standards, the control of air pollutant emissions from the printing industry is becoming increasingly stringent, necessitating the implementation of exhaust gas treatment systems to collect and purify pollutants and ensure compliance with emission standards.

[0003] Current printer exhaust gas treatment processes mostly employ a "preliminary collection + pretreatment + deep purification" workflow. The preliminary collection stage requires simultaneous filtration of dust impurities in the exhaust gas to prevent dust from clogging subsequent purification units and reducing processing efficiency. Current preliminary collection devices generally use primary or medium-efficiency filters for dust interception. While this achieves basic filtration, it has significant technical drawbacks in practical applications: ultrafine, highly viscous dust in printer exhaust easily adheres to and embeds into the pores of the filter fibers, quickly forming a dense dust cake. This leads to a sharp increase in airflow resistance on the filter and a significant decrease in exhaust gas collection efficiency. Regular shutdowns are required to disassemble, clean, or replace the filters, which not only interrupts the production process and reduces equipment operating efficiency but also increases maintenance costs and workload. Summary of the Invention

[0004] In view of the problem that the filter screen of the existing technology is easy to clog and requires manual shutdown for cleaning or replacement, a printing press exhaust gas treatment device and treatment method are proposed.

[0005] This application provides a printing press exhaust gas treatment device and method, the purpose of which is to: solve the technical defects of existing printer exhaust gas preliminary collection filters that are prone to clogging and require regular shutdown maintenance by adopting an integrated structure with a cylindrical filter screen divided into four areas, pipeline pressure-triggered rotation, and synchronous water flushing for online cleaning.

[0006] The technical solution of the present invention is as follows: a printing press exhaust gas treatment device, including a guide duct, a regulating valve disposed at one end of the guide duct, a gas collection hood disposed at one end of the regulating valve, and a filter unit disposed inside the gas collection hood, wherein the filter unit includes a conversion component and a dredging component disposed inside the gas collection hood. The conversion component includes an air inlet and an air outlet opened inside the air collection hood, an installation groove opened inside the air collection hood, a filter cylinder rotatably installed inside the installation groove, and multiple partition plates equidistantly installed on the outer wall of the filter cylinder with the filter cylinder axis as the center point. The multiple partition plates cooperate with each other to divide the installation groove into a first region, a second region, a third region and a fourth region. The air inlet is connected to the first area at one end near the inside, and the air outlet is connected to the fourth area at one end near the inside. The exhaust gas entering the inside of the gas collection hood first passes through the first area and then, under the action of negative pressure, directly passes through the fourth area and enters the air outlet for discharge. At this time, only the filter cartridge area located in the first area filters the dust in the exhaust gas.

[0007] Furthermore, the unblocking component includes a water distribution plate disposed on the inner wall of the mounting groove and a water inlet pipe disposed on the side wall of the air collection hood. The water distribution plate is arc-shaped and located inside the filter cylinder. The end of the water inlet pipe near the inner side is connected to the interior of the water distribution plate. The lower end of the water distribution plate has multiple water outlets, and the water distribution plate is located directly above the third and fourth regions. A triggering component is installed on the inner wall of the mounting groove.

[0008] Furthermore, the triggering assembly includes a transformer groove inside the mounting groove and a vent groove inside the gas collection hood. The transformer groove and the vent groove are interconnected. A transformer plate is slidably disposed inside the transformer groove. A synchronizing rod is disposed on the side wall of the transformer plate. A trigger plate is disposed at one end of the synchronizing rod. A reset element is installed between the transformer plate and the vent groove. An opening and closing element is installed between the trigger plate and the water inlet pipe. A delay element is installed between the transformer plate and the partition plate.

[0009] Furthermore, the reset element includes a fixed plate disposed on the inner wall of the vent groove, and a reset spring disposed on the side wall of the fixed plate, one end of the reset spring being fixedly connected to the side wall of the trigger plate.

[0010] Furthermore, the opening and closing element includes a rotating rod rotatably mounted on the side wall of the water inlet pipe, an opening and closing plate mounted on the rotating rod, the end face shape and size of the opening and closing plate being equal to the end face shape and size of the water inlet pipe, an adjusting gear mounted on the rotating rod, extension plates mounted on the side walls of both ends of the trigger plate, and a trigger tooth plate mounted at the lower end of the extension plate, wherein the trigger tooth plate meshes with the corresponding adjusting gear.

[0011] Furthermore, the delay element includes a connecting rod disposed on the side wall of the transformer plate, a limiting rod disposed on the upper end of the connecting rod, and a mating groove opened on multiple partition plates. The limiting rod is used to limit the partition plates. When the opening and closing plates are opened for a specified time, the limiting rod enters the mating groove and briefly releases the limitation on the partition plates, so that the partition plates can rotate with the filter cylinder.

[0012] Furthermore, a drain pipe is provided at the lower end of the gas collection hood, and a drain valve is provided at the lower end of the drain pipe. The drain pipe is located directly below the filter cylinder and is used to periodically discharge the wastewater after cleaning the filter cylinder.

[0013] Furthermore, a method for treating printing press exhaust gas includes the following steps: Arrangement of gas collection points: Gas collection hoods are installed in the printing unit, drying outlet, and ink mixing area; Filtration system: After the exhaust gas enters the gas collection hood, the filter cartridge filters out dust and impurities in the exhaust gas. Automatic unblocking: When dust clogs a large area of ​​the filter cartridge in the first zone, the internal pressure changes and the pressure acts directly on the partition plate and the pressure transformer plate. The partition plate is driven by the pressure to rotate the filter cartridge, and the pressure transformer plate opens the water inlet pipe as it slides horizontally under pressure. Temperature and humidity control: The high-temperature exhaust gas is first cooled by a heat exchanger to improve adsorption efficiency, and at the same time, the exhaust gas is dehumidified; Deep cleaning: Exhaust gas enters the activated carbon adsorption tower to adsorb VOCs; Monitoring and Emissions: Gases that meet emission standards are released into the atmosphere.

[0014] Furthermore, whenever the filter cartridge rotates, the water distribution plate will clean and unclog the surface of the filter cartridge in advance, making it easier for subsequent use.

[0015] The beneficial effects of this invention are: By dividing the filter into four independent filtration zones, the filter cartridge will immediately switch to its own rotation when a single zone becomes clogged, and the standby zone will quickly start filtration. The entire process can be completed without stopping the machine or requiring manual intervention, ensuring continuous operation of waste gas treatment and production equipment, and reducing the production capacity loss caused by downtime maintenance to a certain extent.

[0016] By using the pressure change inside the pipeline as the drive signal for rotation, the airflow is obstructed and the pressure inside the pipe rises sharply after the filtration area is blocked. The pressure difference drives the filter screen to rotate and switch, eliminating the need for additional electronic control sensors and complex power components. It is highly responsive and precise in triggering, which simplifies the overall structure of the equipment, reduces the failure rate, and achieves fully automated operation, reducing manual supervision and operating costs.

[0017] By rotating the filtration zones while flushing and cleaning idle and clogged areas, the filter screen is automatically unblocked during normal operation. This prevents ultrafine sticky dust from becoming embedded in the filter fibers and causing stubborn blockages, ensuring that the filter screens in each zone always maintain high-efficiency filtration performance, significantly reducing filter screen wear, extending overall service life, and reducing the frequency of consumable replacement.

[0018] A continuously unobstructed filtration channel can stabilize the air volume of collected exhaust gas, prevent the unorganized escape of exhaust gas, and prevent dust from penetrating the filter and entering the downstream purification unit. This avoids clogging and failure of equipment such as activated carbon and catalytic modules, ensuring stable and compliant exhaust gas treatment efficiency throughout the process and mitigating the risk of exceeding environmental standards. Compared with traditional plate filters, the cylindrical structure provides a more uniform airflow distribution and a superior dust interception effect. Attached Figure Description

[0019] Figure 1 A first-view three-dimensional structural diagram of a printing press exhaust gas treatment device; Figure 2 A schematic diagram of the gas collection hood installation structure for a printing press exhaust gas treatment device; Figure 3 A printing press exhaust gas treatment device Figure 2 Schematic diagram of the planar structure; Figure 4 A printing press exhaust gas treatment device Figure 3 Enlarged structural diagram at point A in the middle; Figure 5 A schematic diagram of the water inlet pipe installation structure of a printing press exhaust gas treatment device; Figure 6 A printing press exhaust gas treatment device Figure 5 Enlarged structural diagram at point A in the middle; Figure 7 A printing press exhaust gas treatment device Figure 5 Schematic diagram of the planar structure; Figure 8 This is a schematic diagram of the installation structure of the opening and closing plate of a printing press exhaust gas treatment device.

[0020] In the picture: 1. Air duct; 2. Regulating valve; 3. Air collection hood; 101. Air inlet; 102. Air outlet; 103. Mounting slot; 104. Filter cartridge; 105. Partition plate; 106. First zone; 107. Second zone; 108. Third zone; 109. Fourth zone; 201. Water distribution plate; 202. Water inlet pipe; 301. Transformer plate; 302. Synchronizing rod; 303. Trigger plate; 304. Fixing plate; 305. Return spring; 401. Rotating rod; 402. Opening and closing plate; 403. Adjusting gear; 404. Extension plate; 405. Trigger tooth plate; 501. Connecting rod; 502. Limiting rod; 503. Mating slot; 504. Sewage pipe; 505. Sewage valve. Detailed Implementation

[0021] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, the specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

[0022] Example 1, referring to Figures 1-4 The first embodiment of the present invention provides a printing press exhaust gas treatment device, including a guide duct 1, a regulating valve 2 fixedly installed at one end of the guide duct 1, a gas collection hood 3 fixedly installed at one end of the regulating valve 2, and a filter unit installed inside the gas collection hood 3. The filter unit includes a conversion component and a dredging component installed inside the gas collection hood 3.

[0023] The conversion component includes an air inlet 101 and an air outlet 102 inside the air collection hood 3, a mounting groove 103 inside the air collection hood 3, a filter cylinder 104 rotatably installed inside the mounting groove 103, and multiple partition plates 105 fixedly installed at equal intervals on the outer wall of the filter cylinder 104 with the axis of the filter cylinder 104 as the center. The multiple partition plates 105 cooperate with each other to divide the mounting groove 103 into a first region 106, a second region 107, a third region 108, and a fourth region 109.

[0024] The air inlet 101 is connected to the first area 106 at one end near the inside, and the air outlet 102 is connected to the fourth area 109 at one end near the inside. The exhaust gas entering the inside of the gas collection hood 3 first passes through the first area 106 and then, under the action of negative pressure, directly passes through the fourth area 109 and enters the air outlet 102 for discharge. At this time, only the filter cartridge 104 area located in the first area 106 filters the dust in the exhaust gas.

[0025] Specifically, the filter cartridge 104 is divided into four independent filtration zones by the partition plate 105. Under normal conditions, when the exhaust gas enters the gas collection hood 3 through negative pressure, the exhaust gas first passes through the surface of the filter cartridge 104 located in the first zone 106 under the action of negative pressure, and then enters the outlet 102 through the second zone 107 to complete the filtration of dust inside the exhaust gas. Due to the separation of the partition plate 105, the exhaust gas cannot pass through the surface of the filter cartridge 104 in other zones when being filtered. When a single zone is blocked, the exhaust gas cannot flow normally inside, which will increase the pressure on the filter cartridge 104 and the partition plate 105 on its surface. At this time, the filter cartridge 104 rotates, turning the other zones into the first zone 106 to filter the subsequent exhaust gas. The whole process does not require machine shutdown or manual intervention, ensuring continuous operation of exhaust gas treatment and production equipment, and reducing the production capacity loss caused by machine shutdown and maintenance to a certain extent.

[0026] The filter cartridge 104's surface area is replaced by changing the pressure inside the pipe. The principle is that when the filtration area becomes clogged, airflow is obstructed, causing a sudden increase in pipe pressure. This pressure difference drives the cartridge's rotation, eliminating the need for additional electronic sensors and complex power components. The system is highly responsive and precisely triggered, simplifying the overall equipment structure, reducing the failure rate, and achieving fully automated operation, thus reducing manual monitoring and operating costs. Each of the four partition plates 105 has a suitable counterweight fixedly installed at the end furthest from the filter cartridge 104. When the negative pressure reaches equilibrium during the filter cartridge 104's rotation, the cartridge 104 completes its final reset under the weight of the counterweight, ensuring that all partition plates 105 are in a balanced and horizontal state.

[0027] During operation, initially, the exhaust gas is drawn into the gas collection hood 3 under negative pressure. At this point, the exhaust gas directly enters the first zone 106 through the inlet 101. The filter cartridge 104 inside the first zone 106 filters the dust in the exhaust gas. The filtered exhaust gas then directly enters the fourth zone 109 under negative pressure and is discharged through the outlet 102. When the filter cartridge 104 in the first zone 106 becomes clogged, the negative pressure inside its pipe increases rapidly. This pressure acts directly on the partition plate 105, causing the partition plate 105 to rotate under the negative pressure. Since the outlet 102 is directly facing the bottom partition plate 105, the bottom partition plate 105 experiences the greatest suction when the internal negative pressure increases. At this time, the partition plate 105, under negative pressure, causes the entire filter cartridge 104 to rotate clockwise (see reference). Figure 3 At this point, the filter cartridge 104, which was originally located in the first area 106, is now in the fourth area 109, and the filter cartridge 107, which was originally located in the second area, is now located in the first area 106. The filter cartridge 104, which was originally located in the second area 107, is now responsible for filtration, while the filter cartridge 104 area, which was originally located in the first area 106, is waiting for subsequent dredging.

[0028] Example 2, refer to Figures 5-8This is the second embodiment of the present invention. The difference between this embodiment and the first embodiment is that the unblocking component includes a water distribution plate 201 fixedly installed on the inner wall of the mounting groove 103 and a water inlet pipe 202 fixedly installed on the side wall of the air collection hood 3. The water distribution plate 201 is arc-shaped and located inside the filter cylinder 104. The end of the water inlet pipe 202 near the inner side is connected to the interior of the water distribution plate 201. The lower end of the water distribution plate 201 has multiple water outlets, and the water distribution plate 201 is located directly above the third region 108 and the fourth region 109. A triggering component is installed on the inner wall of the mounting groove 103. The triggering assembly includes a transformer groove inside the mounting groove 103 and a vent groove inside the gas collection hood 3. The transformer groove and the vent groove are interconnected. A transformer plate 301 is slidably installed inside the transformer groove. A synchronizing rod 302 is fixedly installed on the side wall of the transformer plate 301. A trigger plate 303 is fixedly installed at one end of the synchronizing rod 302. A reset element is installed between the transformer plate 301 and the vent groove. An opening and closing element is installed between the trigger plate 303 and the water inlet pipe 202. A delay element is installed between the transformer plate 301 and the partition plate 105.

[0029] The reset element includes a fixed plate 304 fixedly mounted on the inner wall of the venting slot, and a reset spring 305 fixedly mounted on the side wall of the fixed plate 304. One end of the reset spring 305 is fixedly connected to the side wall of the trigger plate 303. The opening and closing element includes a rotating rod 401 rotatably mounted on the side wall of the water inlet pipe 202, an opening and closing plate 402 fixedly mounted on the rotating rod 401, the end face shape and size of the opening and closing plate 402 being equal to the end face shape and size of the water inlet pipe 202, an adjusting gear 403 fixedly mounted on the rotating rod 401, an extension plate 404 fixedly mounted on the side walls of both ends of the trigger plate 303, and a trigger tooth plate 405 fixedly mounted on the lower end of the extension plate 404. The trigger tooth plate 405 meshes with the corresponding adjusting gear 403. The delay element includes a connecting rod 501 fixedly installed on the side wall of the transformer plate 301, a limiting rod 502 fixedly installed on the upper end of the connecting rod 501, and a mating groove 503 opened on multiple partition plates 105. The limiting rod 502 is used to limit the partition plate 105. When the opening and closing plate 402 is opened for a specified time, the limiting rod 502 enters the mating groove 503 and briefly releases the limitation on the partition plate 105, so that the partition plate 105 can rotate with the filter cylinder 104.

[0030] Specifically, the unblocking component is only triggered when the filter cartridge 104 located in the first area 106 becomes blocked. When the first area 106 is blocked, the delay element first limits the partition plate 105, so that the partition plate 105 cannot rotate temporarily when subjected to negative pressure. At this time, the negative pressure acts directly on the pressure plate 301, causing the pressure plate 301 to move horizontally when subjected to pressure. During the movement of the pressure plate 301 under pressure, the trigger component drives the opening and closing plate 402 to rotate, causing the water inlet pipe 202 to open and flow into the interior of the water distribution plate 201. This allows the water inside the water distribution plate 201 to flow into the surface of the filter cartridge 104 located in the third area 108 and the fourth area 109. Since the filter cartridges 104 in these two areas were previously blocked, the flowing water unblocks the blocked areas. When the filter cartridges 104 in these two areas rotate back to the first area 106, they can be used normally again. After the water flow washes the surface of the filter cylinder 104 for a certain period of time (i.e., after the pressure plate 301 moves a certain distance), the limiting rod 502 moves to the mating groove 503. At this time, the limiting rod 502 no longer limits the partition plate 105. At this time, the partition plate 105 can normally drive the filter cylinder 104 to rotate, realizing the conversion of the filter area of ​​the filter cylinder 104.

[0031] By flushing and cleaning idle and clogged areas while the filtration zones are switching, the filter cartridge 104 is automatically unblocked during normal operation. This prevents ultrafine sticky dust from becoming embedded in the filter mesh and forming solid blockages, ensuring that the filter mesh in each zone always maintains high-efficiency filtration performance, significantly reducing filter wear, extending the overall service life, and reducing the frequency of consumable replacement.

[0032] The lower end of the gas collection hood 3 is provided with a sewage pipe 504, and a sewage valve 505 is provided at the lower end of the sewage pipe 504. The sewage pipe 504 is located directly below the filter cylinder 104 and is used to periodically discharge the sewage after cleaning the filter cylinder 104.

[0033] During the process of the water distribution plate 201 clearing the surface of the filter cylinder 104, the cleaned wastewater flows into the sewage pipe 504 under the action of gravity. The staff can discharge the sewage inside by periodically opening the sewage valve 505. The whole process is convenient and efficient.

[0034] During use, when the filter cartridge 104 in the first area 106 becomes clogged, the negative pressure inside the pipe increases. Because the limiting rod 502 limits and fixes the corresponding partition plate 105, the negative pressure inside the pipe acts directly on the transformer plate 301, causing the transformer plate 301 to slide along the groove under the negative pressure. During the sliding process, it drives the trigger plate 303 to move synchronously, causing the trigger tooth plates 405 on both sides of the trigger plate 303 to move horizontally synchronously and drive the adjusting gear 403 to rotate, thus causing the opening and closing plate 4... When 02 is in the open state, the water inside the opening and closing plate 402 flows into the water distribution plate 201 and clears the previously blocked filter cylinder 104 area in the third area 108 and the fourth area 109 through the water outlet. When the pressure plate 301 moves to the designated position, the limit rod 502 and the mating groove 503 overlap each other, and the limit rod 502 no longer limits the partition plate 105. At this time, the partition plate 105 replaces the filter cylinder 104 in the first area 106 under the action of negative pressure.

[0035] The remaining structure is the same as that in Example 1.

[0036] Example 3, referring to Figures 1-8 A method for treating exhaust gas from a printing press includes the following steps: Arrangement of gas collection points: Gas collection hoods 3 are installed in the printing unit, drying outlet and ink mixing area.

[0037] Filtration system: After the exhaust gas enters the gas collection hood 3, the filter cartridge 104 filters the dust and impurities in the exhaust gas.

[0038] Automatic unblocking: In the initial state, the exhaust gas is drawn into the gas collection hood 3 under the action of negative pressure. At this time, the exhaust gas directly enters the first area 106 through the air inlet 101. The filter cartridge 104 located inside the first area 106 filters the dust in the exhaust gas. The filtered exhaust gas directly enters the fourth area 109 under the action of negative pressure and is discharged through the air outlet 102. When the filter cartridge 104 in the first area 106 becomes clogged, the negative pressure inside its pipe increases rapidly, and this pressure acts directly on the partition plate 105. Because the limiting rod 502 limits and fixes the corresponding partition plate 105, the negative pressure inside the pipe will first drive the pressure plate 301 to move, so that the pressure plate 301 slides along the groove under the action of negative pressure. During the sliding process, it drives the trigger plate 303 to move synchronously, so that the trigger tooth plates 405 on both sides move horizontally synchronously during the movement of the trigger plate 303 and drive the adjusting gear 403 to rotate, so that the opening and closing plate 402 is in the open state. After the opening and closing plate 402 is opened, the water inside it flows into the water distribution plate 201 and clears the previously clogged filter cartridge 104 area in the third area 108 and the fourth area 109 through the water outlet. When the pressure plate 301 moves to the designated position, the limiting rod 502 and the mating groove 503 overlap each other, and the limiting rod 502 no longer limits the partition plate 105.

[0039] When the limiting rod 502 does not limit the partition plate 105, the partition plate 105, under the action of negative pressure, causes the filter cylinder 104 to rotate. Since the air outlet 102 is directly facing the bottom partition plate 105, when the internal negative pressure increases, the bottom partition plate 105 experiences the greatest suction force. At this time, under the action of negative pressure, the partition plate 105 causes the filter cylinder 104 to rotate clockwise (see reference). Figure 3 At this point, the filter cartridge 104, originally located in the first region 106, is now in the fourth region 109, and the filter cartridge 107, originally located in the second region, is now located in the first region 106. The filter cartridge 104, originally located in the second region 107, now performs the filtration task, while the filter cartridge 104 in the first region 106 awaits further unclogging. After replacement, the internal negative pressure of the pipe returns to its initial state. At this time, the transformer plate 301 quickly resets under the elastic force of the return spring 305, facilitating future use.

[0040] Temperature and humidity control: The high-temperature exhaust gas is first cooled by a heat exchanger to improve adsorption efficiency, and at the same time, the exhaust gas is dehumidified.

[0041] Deep cleaning: Waste gas enters the activated carbon adsorption tower to adsorb VOCs.

[0042] Monitoring and Emissions: Gases that meet emission standards are released into the atmosphere.

[0043] Whenever the filter cylinder 104 rotates, the water distribution plate 201 will clean and unclog the surface of the filter cylinder 104 in advance to facilitate subsequent use.

[0044] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit it. Although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, and all such modifications or substitutions should be covered within the scope of the claims of the present invention.

Claims

1. A printing press exhaust gas treatment device, comprising a guide duct (1), a regulating valve (2) disposed at one end of the guide duct (1), and a gas collection hood (3) disposed at one end of the regulating valve (2), characterized in that, It also includes a filter unit disposed inside the gas collection hood (3), the filter unit including a conversion component and a dredging component disposed inside the gas collection hood (3); The conversion component includes an air inlet (101) and an air outlet (102) inside the air collection hood (3), an installation groove (103) inside the air collection hood (3), a filter cylinder (104) rotatably disposed inside the installation groove (103), and multiple partition plates (105) equidistantly installed on the outer wall of the filter cylinder (104) with the center of the filter cylinder (104) as the center point. The multiple partition plates (105) cooperate with each other to divide the installation groove (103) into a first region (106), a second region (107), a third region (108), and a fourth region (109). The air inlet (101) is connected to the first region (106) at one end near the inside, and the air outlet (102) is connected to the fourth region (109) at one end near the inside. The exhaust gas entering the inside of the gas collection hood (3) first passes through the first region (106) and then directly passes through the fourth region (109) under the action of negative pressure to enter the air outlet (102) for discharge. At this time, only the filter cartridge (104) area located in the first region (106) filters the dust in the exhaust gas.

2. The printing press exhaust gas treatment device according to claim 1, characterized in that, The unblocking component includes a water distribution plate (201) disposed on the inner wall of the mounting groove (103) and a water inlet pipe (202) disposed on the side wall of the air collection hood (3). The water distribution plate (201) is arc-shaped and located inside the filter cylinder (104). The end of the water inlet pipe (202) near the inner side is connected to the interior of the water distribution plate (201). The lower end of the water distribution plate (201) is provided with multiple water outlets, and the water distribution plate (201) is located directly above the third region (108) and the fourth region (109). A triggering component is installed on the inner wall of the mounting groove (103).

3. The printing press exhaust gas treatment device according to claim 2, characterized in that, The triggering assembly includes a transformer groove inside the mounting groove (103) and a ventilation groove inside the gas collection hood (3). The transformer groove and the ventilation groove are interconnected. A transformer plate (301) is slidably disposed inside the transformer groove. A synchronizing rod (302) is disposed on the side wall of the transformer plate (301). A trigger plate (303) is disposed at one end of the synchronizing rod (302). A reset element is installed between the transformer plate (301) and the ventilation groove. An opening and closing element is installed between the trigger plate (303) and the water inlet pipe (202). A delay element is installed between the transformer plate (301) and the partition plate (105).

4. The printing press exhaust gas treatment device according to claim 3, characterized in that, The reset element includes a fixed plate (304) disposed on the inner wall of the venting groove and a reset spring (305) disposed on the side wall of the fixed plate (304). One end of the reset spring (305) is fixedly connected to the side wall of the trigger plate (303).

5. The printing press exhaust gas treatment device according to claim 4, characterized in that, The opening and closing element includes a rotating rod (401) rotatably mounted on the side wall of the water inlet pipe (202), an opening and closing plate (402) mounted on the rotating rod (401), the end face shape and size of the opening and closing plate (402) being equal to the end face shape and size of the water inlet pipe (202), an adjusting gear (403) mounted on the rotating rod (401), an extension plate (404) mounted on the side walls of both ends of the trigger plate (303), and a trigger tooth plate (405) mounted at the lower end of the extension plate (404), the trigger tooth plate (405) meshing with the corresponding adjusting gear (403).

6. The printing press exhaust gas treatment device according to claim 5, characterized in that, The delay element includes a connecting rod (501) disposed on the side wall of the transformer plate (301), a limiting rod (502) disposed on the upper end of the connecting rod (501), and a mating groove (503) opened on multiple partition plates (105). The limiting rod (502) is used to limit the partition plate (105). When the opening and closing plate (402) is opened for a specified time, the limiting rod (502) enters the mating groove (503) and briefly releases the limitation on the partition plate (105), so that the partition plate (105) can rotate with the filter cylinder (104).

7. The printing press exhaust gas treatment device according to claim 6, characterized in that, The lower end of the gas collection hood (3) is provided with a sewage pipe (504), and the lower end of the sewage pipe (504) is provided with a sewage valve (505). The sewage pipe (504) is located directly below the filter cylinder (104). The sewage pipe (504) is used to periodically discharge the sewage after cleaning the filter cylinder (104).

8. A method for treating exhaust gas from a printing press, employing the exhaust gas treatment device for a printing press as described in claim 7, characterized in that... Includes the following steps; Arrangement of gas collection points: Gas collection hoods (3) are set up in the printing unit, drying outlet and ink mixing area; Filtration system: After the exhaust gas enters the gas collection hood (3), the filter cartridge (104) filters the dust and impurities in the exhaust gas. Automatic unblocking: When dust clogs a large area of ​​the filter cartridge (104) in the first area (106), the internal pressure changes and the pressure acts directly on the partition plate (105) and the pressure plate (301). The partition plate (105) is driven by the pressure to rotate the filter cartridge (104), and the pressure plate (301) opens the water inlet pipe (202) during the horizontal sliding process. Temperature and humidity control: The high-temperature exhaust gas is first cooled by a heat exchanger to improve adsorption efficiency, and at the same time, the exhaust gas is dehumidified; Deep cleaning: Exhaust gas enters the activated carbon adsorption tower to adsorb VOCs; Monitoring and Emissions: Gases that meet emission standards are released into the atmosphere.

9. A method for treating printing press exhaust gas according to claim 8, characterized in that, The process includes the following steps: whenever the filter cartridge (104) rotates, the water distribution plate (201) will clean and unclog the surface of the filter cartridge (104) in advance to facilitate subsequent use.

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