Waste gas treatment system and method for coating line

Abstract

The invention discloses a coating line waste gas treatment system and method, and belongs to the technical field of waste gas treatment.The coating line waste gas treatment system comprises a frame main body and further comprises a top box and a bottom box, the treatment barrel is mounted in the center of the frame main body and is used for preliminarily treating the waste gas. According to the invention, the turbulent flow box is dynamically deflected and matched with rotary motion to remarkably improve the turbulence degree of airflow and prolong the retention time of waste gas, so that the contact effect with spray liquid is improved, and meanwhile, the angle of the spray pipe is adjustable, so that the dual-mode switching of oblique upward diffusion spray and vertical jet cleaning can be realized; the gas-liquid contact efficiency can be improved, self-cleaning of the treatment cylinder can be achieved, synchronous adjustment exists between the turbulent flow box and the water drainage pipe, combination of multiple functions of centrifugal separation, spraying washing and self-cleaning can be achieved in the treatment cylinder in cooperation with an airflow organization optimization and dynamic adjustment mechanism, and the device has multiple functions.

Description

Technical Field

[0001] This invention belongs to the field of waste gas treatment technology, and in particular relates to a waste gas treatment system and method for a coating line. Background Technology

[0002] Coating refers to covering the surfaces of metals and non-metals with protective or decorative layers. With the rapid development of industrial automation technology, coating has evolved from manual to industrial automation. The coating process generates waste gas, which must be strictly treated to meet emission standards.

[0003] Document CN117679888A discloses a cyclone hybrid tower device, which includes a tower body. From top to bottom, the tower body is provided with an exhaust port, a demister plate, a spray section, a cyclone section, and a water treatment section. The spray section includes an upper spray pipe and a lower spray pipe. The water treatment section is connected to both the upper and lower spray pipes. The cyclone section includes several cyclone barrels, which are detachably connected to the tower body. Solid packing balls are placed inside the cyclone barrels. The top of each cyclone barrel is open and detachably fitted with a cyclone impeller corresponding to the exhaust port. The bottom of each cyclone barrel is equipped with a water treatment device. The invention features interconnected water outlets and a cyclone inlet on the bottom side wall of the cyclone tank. Several spiral nozzles (first type) are detachably connected to the upper spray pipe, and these nozzles are evenly distributed laterally along the tower body. Several sets of spiral nozzles (second type) are detachably connected to the lower spray pipe, each corresponding to one of the cyclone tanks. The beneficial effect of this invention is that it improves dust removal efficiency. However, in actual processing, the waste gas has a short residence time in the cyclone tank and insufficient contact with the spray liquid, which can easily affect the treatment results. Therefore, improvements are needed. Summary of the Invention

[0004] The purpose of this invention is to address the problem that the short residence time of exhaust gas in the cyclone tank results in insufficient contact with the spray liquid, which easily affects the treatment results of the exhaust gas. Therefore, this invention proposes an exhaust gas treatment system and method for a coating line.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: A waste gas treatment system for a painting line includes a frame body and further includes: Top box, installed on top of the main frame; The treatment cylinder, installed at the center of the main frame, is used for preliminary treatment of exhaust gas. The dust removal component is installed inside the treatment cylinder, so that the exhaust gas enters the treatment cylinder and forms a spiral upward airflow. Using centrifugal force in conjunction with the spray liquid, the particulate dust in the exhaust gas adheres to the inner wall of the treatment cylinder and is discharged from the bottom of the treatment cylinder under the action of gravity. The filter assembly, located in the top box, is used for secondary treatment and drying of the pre-treated exhaust gas; Adjustment component, located on one side of the filter component, is used to adjust the airflow effect of the filter component; The air inlet pipe is tangentially connected to the treatment cylinder and connected to the exhaust gas pipe of the painting line. It is used to allow the exhaust gas to enter the treatment cylinder along the tangential direction of the treatment cylinder, so as to facilitate the formation of a spiral airflow.

[0006] As a further description of the above technical solution: The dust removal components include: A vortex fan is rotatably connected to the top of the treatment cylinder and is used in conjunction with the air intake pipe to create a spiral upward airflow of exhaust gas. Rotate the empty tube and connect it to the bottom of the vortex fan; Two sets of symmetrically arranged baffle boxes, each set of baffle boxes consists of multiple baffle boxes arranged in a linear array, and each independent baffle box is rotatably connected to a rotating hollow tube. A hollow shaft is connected to one side of the baffle box, and the hollow shaft is rotatably connected to the rotating hollow tube and extends into the rotating hollow tube. After the baffle box deflects itself, it can help enhance the spiral effect of the exhaust gas in the treatment cylinder under the drive of the rotating hollow tube. The drain pipe is rotatably connected to the turbulence box. One side of the drain pipe is connected to multiple spray pipes arranged in a linear array, which are used to spray out the spray liquid to clean the inner wall of the treatment cylinder or to adsorb dust particles in the exhaust gas. A water supply pipe is connected inside a rotating hollow pipe and is used to deliver spray liquid into the drain pipe. Multiple rotating hoses arranged in a linear array are connected to both sides of the water supply pipe. The rotating hoses are connected to the inner wall of the hollow shaft, and the other end of the rotating hoses is connected to one side of the drain pipe. Water supply device: Two water supply devices are symmetrically distributed on both sides of the main frame, used to deliver spray liquid into the water pipe; A fixed motor is mounted on the bottom of the processing cylinder via a mounting plate. One end of the fixed motor's output shaft is connected to the bottom of the rotating tube, which is used to drive the rotating tube and the vortex fan to rotate. A transmission gear is connected to the outer surface of the hollow shaft and located inside the rotating hollow tube. Multiple transmission gears are meshed with the same movable rack on one side. One end of the movable rack is connected to a lifting push rod. One side of the lifting push rod is connected to the inner wall of the rotating hollow tube through an assembly plate and is used to drive the turbulence box to deflect through the hollow shaft.

[0007] As a further description of the above technical solution: The dust removal assembly also includes: The transmission mechanism includes a first synchronous pulley, a second synchronous pulley, and a synchronous belt. The first synchronous pulley is connected to the drain pipe, the second synchronous pulley is located inside the spoiler box and is rotatably connected to the inner wall of the spoiler box, and the synchronous belt is connected between the first synchronous pulley and the second synchronous pulley. A linkage gear is installed on one side of the second synchronous pulley. A linkage rack is meshed on one side of the linkage gear. A movable plate is connected to the bottom of the linkage rack. A movable rod is connected to one side of the movable plate. One end of the movable rod extends to the outside of the spoiler box. A reset spring is sleeved on the outer surface of the movable rod. The two ends of the reset spring are respectively connected to one side of the movable plate and one side of the inner wall of the spoiler box. The drive ring is connected to the outer surface of the rotating hollow tube and is coaxial with the hollow shaft. Both sides of the drive ring are provided with inclined grooves, and the moving rod is moved by the change of height.

[0008] As a further description of the above technical solution: The dust removal assembly also includes: A rotating slip ring is connected to the outer surface of the bottom of the rotating hollow pipe, and the rotating slip ring is connected to the water supply pipe through a connecting pipe; A fixed slip ring is installed inside the processing cylinder and is rotatably connected to and communicates with the rotating slip ring; Support pipes are located on both sides of the fixed slip ring and connected to the fixed slip ring. The other end of the support pipe extends to the outside of the treatment cylinder and is connected to one side of the water supply device.

[0009] As a further description of the above technical solution: The filtering component includes: Two symmetrically arranged baffles are installed inside the top box, dividing the top box into three spaces: a processing zone in the middle, backwash zones symmetrically distributed on both sides of the processing zone, and a sliding groove in the middle of the baffles. Two filler plates are connected to each other and are slidably connected in the sliding groove. The filler plates periodically move back and forth between the treatment zone and the backflushing zone, and perform secondary treatment and drying of the exhaust gas. The heating air box is installed on the top of the top box and located above the backwash zone. The bottom of the heating air box is connected to a first connecting pipe. The other end of the first connecting pipe extends into the interior of the backwash zone and is connected to a fixed pipe. The fixed pipe is connected to the top of the inner wall of the top box. The oscillating pipe is rotatably connected to the bottom of the fixed pipe, and the oscillating pipe and the fixed pipe are connected by a second connecting pipe. It is used to output hot air and reverse flush the filler plate to remove impurities adsorbed on the filler plate.

[0010] As a further description of the above technical solution: The filtering component also includes: Two symmetrically arranged drive racks are connected to the side of the filler plate; Two fixed slide rods are connected inside the top box, and the fixed slide rods are slidably connected to the drive rack; Two sealing slots are connected between two partition plates, and a drive rack is slidably connected inside the sealing slots to ensure the sealing of the processing area.

[0011] As a further description of the above technical solution: The filtering component also includes: The drive motor is mounted on one side of the top box; The drive gear is connected to one end of the output shaft of the drive motor. The drive gear passes through the top box and the sealing groove seat and meshes with the drive rack.

[0012] As a further description of the above technical solution: The adjustment components include: Multiple links, with the links hinged to one side of the swing pipe; An electric actuator is installed on the top of the top box, and the output end of the electric actuator is hinged to the other end of the connecting rod.

[0013] As a further description of the above technical solution: Also includes: Two recycling pipes connect to both sides of the top box and are connected to an external recycling device for recycling impurities processed by the filter assembly. An exhaust pipe, connected to the top of the top chamber, is used to discharge the treated gas.

[0014] A method for treating exhaust gas from a painting line includes the following steps: S1. The exhaust gas from the painting line enters the treatment cylinder tangentially through the intake pipe. Under the combined action of the vortex fan and the turbulence box, a high-speed spiral upward airflow is formed, and the dust particles in the exhaust gas are thrown towards the cylinder wall under the action of centrifugal force. S2. The fixed motor drives the rotating empty pipe to rotate the drain pipe. The spray liquid provided by the water supply device enters the water supply pipe through the fixed slip ring and the rotating slip ring. It is then transported to the spray pipe of the drain pipe through the rotating hose and sprayed out. The wet cylinder wall absorbs dust and forms a liquid film that flows down the inner wall and is discharged. S3. The pre-treated exhaust gas enters the top box treatment area. The drive motor drives the two filling plates to move back and forth periodically in the sliding groove through the drive gear and drive rack. When the filling plate moves to the backflush area, the hot air from the heating air box is blown out through the fixed pipe and the swing pipe. S4. The electric push rod adjusts the angle of the swing pipe through the connecting rod to make it accurately align with the filler plate for reverse blowing. The removed impurities are discharged through the recovery pipe, while the clean gas is discharged through the exhaust pipe.

[0015] In summary, due to the adoption of the above technical solution, the beneficial effects of the present invention are: 1. In this invention, by setting up a dust removal component, a high-efficiency spiral airflow is formed through the synergistic action of tangential air intake and vortex fan, enhancing the centrifugal separation effect of particulate matter. The dynamic deflection setting of the turbulence box, combined with the rotational motion, significantly improves the airflow turbulence and prolongs the residence time of the exhaust gas, thereby improving the contact effect with the spray liquid. At the same time, the spray pipe angle is adjustable, enabling dual-mode switching between oblique upward diffusion spray and vertical jet cleaning, which not only improves the gas-liquid contact efficiency but also achieves self-cleaning of the treatment cylinder. Furthermore, there is synchronous adjustment between the turbulence box and the drain pipe. Combined with the airflow organization optimization and dynamic adjustment mechanism, a multi-functional combination of centrifugal separation, spray washing, and self-cleaning functions can be achieved within the treatment cylinder, making the device multifunctional.

[0016] 2. In this invention, by setting up a filter assembly, the filler plate in the treatment zone performs secondary treatment on the exhaust gas. At the same time, hot air is used to regenerate the saturated filler plate online. This not only avoids the downtime caused by replacing filter media in the traditional way, but also effectively restores the adsorption performance of the filler through thermal desorption, achieving deep desorption of VOCs and water vapor, and ensuring continuous operation. The physical isolation design between the treatment zone and the backflushing zone ensures that the exhaust gas treatment and filler regeneration processes do not interfere with each other, maintaining the continuous and stable operation of the system.

[0017] 3. In this invention, by setting an adjustment component, the electric push rod drives the connecting rod to adjust the air outlet direction of the swing pipe, which can accurately control the hot air jet angle, ensure that the hot air evenly covers the surface of the filler plate, significantly improve the backflushing regeneration efficiency, and at the same time, the dynamically adjusted air outlet direction can perform differentiated purging for different areas of the filler plate to avoid local overheating or cleaning dead corners, and extend the service life of the filler plate. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the overall three-dimensional structure of the present invention.

[0019] Figure 2 This is a three-dimensional structural diagram of the present invention from another perspective.

[0020] Figure 3 This is a partial three-dimensional structural schematic diagram of the present invention.

[0021] Figure 4 This is a schematic diagram of a partially disassembled three-dimensional structure of the present invention.

[0022] Figure 5 For the present invention Figure 4 A magnified structural diagram of point A in the middle.

[0023] Figure 6 This is a three-dimensional disassembled structural diagram of the dust removal component of the present invention.

[0024] Figure 7This is a partial three-dimensional structural diagram of the dust removal component of the present invention.

[0025] Figure 8 This is a partial three-dimensional structural diagram of the dust removal component of the present invention.

[0026] Figure 9 For the present invention Figure 8 A magnified structural diagram at point B in the middle.

[0027] Figure 10 This is a schematic cross-sectional view of the internal structure of the turbulence box of the present invention.

[0028] Legend: 1. Top box; 2. Frame body; 3. Exhaust pipe; 4. Filter assembly; 401. Heating air box; 402. Fixed pipe; 403. Swinging pipe; 404. Drive rack; 405. Filler plate; 406. Drive motor; 407. Drive gear; 408. Sealing groove seat; 409. Fixed slide bar; 410. Isolation plate; 5. Recovery pipe; 6. Dust removal assembly; 601. Water supply device; 602. Fixed motor; 603. Rotating empty pipe; 604. Baffle box; 605. Exhaust... Water pipe; 606, fixed slip ring; 607, rotating slip ring; 608, water supply pipe; 609, moving rack; 610, rotating hose; 611, transmission gear; 612, lifting push rod; 613, moving rod; 614, hollow shaft; 615, drive ring; 616, return spring; 617, linkage rack; 618, linkage gear; 619, transmission mechanism; 620, vortex fan; 7, treatment cylinder; 8, air intake pipe; 9, adjustment assembly; 901, electric push rod; 902, connecting rod. Detailed Implementation

[0029] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making any creative efforts shall fall within the scope of protection of the present invention.

[0030] Please see Figures 1-10 , the present invention provides a technical solution: A waste gas treatment system for a painting line includes a frame body 2, and further includes: Top box 1 is installed on top of frame body 2; The treatment cylinder 7 is installed at the center of the frame body 2 and is used for preliminary treatment of exhaust gas. The dust removal component 6 is installed inside the treatment cylinder 7, so that the exhaust gas enters the treatment cylinder 7 and forms a spiral upward airflow. Using centrifugal force in conjunction with the spray liquid, the particulate dust in the exhaust gas adheres to the inner wall of the treatment cylinder 7 and is discharged from the bottom of the treatment cylinder 7 under the action of gravity. The filter assembly 4 is installed in the top box 1 and is used to perform secondary treatment and drying on the pre-treated exhaust gas. Adjustment component 9, located on one side of filter component 4, is used to adjust the air outlet effect of filter component 4; The air inlet pipe 8 is tangentially connected to the treatment cylinder 7 and connected to the exhaust pipe of the painting line, so that the exhaust gas can enter the treatment cylinder 7 along the tangential direction of the treatment cylinder 7, which facilitates the formation of a spiral airflow.

[0031] The vortex fan 620 is rotatably connected to the top of the treatment cylinder 7 and is used in conjunction with the air intake pipe 8 to make the exhaust gas form a spiral upward airflow. Rotate the empty tube 603 and connect it to the bottom of the vortex fan 620; Two sets of symmetrically arranged baffle boxes 604, each set of baffle boxes 604 is composed of multiple baffle boxes 604 arranged in a linear array, and each independent baffle box 604 is rotatably connected to the rotating hollow tube 603. A hollow shaft 614 is connected to one side of the baffle box 604. The hollow shaft 614 is rotatably connected to the rotating hollow tube 603 and extends into the rotating hollow tube 603. After the baffle box 604 deflects itself, it can help enhance the spiral effect of the exhaust gas in the treatment cylinder 7 under the drive of the rotating hollow tube 603. The drain pipe 605 is rotatably connected to the turbulence box 604. One side of the drain pipe 605 is connected to multiple spray pipes arranged in a linear array, which are used to spray out the spray liquid to clean the inner wall of the treatment cylinder 7 or to adsorb dust particles in the exhaust gas. Water supply pipe 608 is connected inside the rotating hollow pipe 603 and is used to supply spray liquid to the drain pipe 605. Multiple rotating hoses 610 arranged in a linear array are connected to both sides of the water supply pipe 608. The rotating hoses 610 are connected to the inner wall of the hollow shaft 614, and the other end of the rotating hoses 610 is connected to one side of the drain pipe 605. Water supply device 601, two water supply devices 601 are symmetrically distributed on both sides of the frame body 2, used to deliver spray liquid into the water pipe 608; A fixed motor 602 is mounted on the bottom of the processing cylinder 7 via a mounting plate. One end of the output shaft of the fixed motor 602 is connected to the bottom of the rotating hollow tube 603, which is used to drive the rotating hollow tube 603 and the vortex fan 620 to rotate. The transmission gear 611 is connected to the outer surface of the hollow shaft 614 and is located inside the rotating hollow tube 603. Multiple transmission gears 611 are meshed with the same movable rack 609 on one side. One end of the movable rack 609 is connected to a lifting push rod 612. One side of the lifting push rod 612 is connected to the inner wall of the rotating hollow tube 603 through an assembly plate, and is used to drive the spoiler box 604 to deflect through the hollow shaft 614.

[0032] The transmission mechanism 619 includes a first synchronous pulley, a second synchronous pulley, and a synchronous belt. The first synchronous pulley is connected to the drain pipe 605, the second synchronous pulley is located inside the spoiler box 604 and is rotatably connected to the inner wall of the spoiler box 604, and the synchronous belt is connected between the first synchronous pulley and the second synchronous pulley. A linkage gear 618 is installed on one side of the second synchronous pulley. A linkage rack 617 is meshed on one side of the linkage gear 618. A movable plate is connected to the bottom of the linkage rack 617. A movable rod 613 is connected to one side of the movable plate. One end of the movable rod 613 extends to the outside of the spoiler box 604. A reset spring 616 is sleeved on the outer surface of the movable rod 613. The two ends of the reset spring 616 are respectively connected to one side of the movable plate and one side of the inner wall of the spoiler box 604. The drive ring 615 is connected to the outer surface of the rotating hollow tube 603 and is coaxial with the hollow shaft 614. The drive ring 615 has inclined grooves on both sides, and drives the moving rod 613 to move by changing its height.

[0033] Rotary slip ring 607 is connected to the outer surface of the bottom of rotary hollow pipe 603, and rotary slip ring 607 is connected to water pipe 608 through a connecting pipe; A fixed slip ring 606 is disposed inside the processing cylinder 7 and is rotatably connected to and communicates with the rotating slip ring 607; Support pipes are located on both sides of the fixed slip ring 606 and connected to the fixed slip ring 606. The other end of the support pipe extends to the outside of the treatment cylinder 7 and is connected to one side of the water supply device 601.

[0034] The specific implementation method is as follows: the exhaust gas from the painting line enters the treatment cylinder 7 tangentially through the air inlet pipe 8. The lifting push rod 612 causes the turbulence box 604 to deflect at a certain angle through the moving rack 609 and the transmission gear 611. At the same time, the moving rod 613, in conjunction with the linkage rack 617, the linkage gear 618 and the transmission mechanism 619, drives the drain pipe 605 to adjust to the corresponding tilt angle. The vortex fan 620 rotates under the drive of the motor to form a stable spiral airflow, so that the exhaust gas maintains a sufficient residence time in the cylinder. The particulate matter is thrown towards the cylinder wall under the action of centrifugal force. The water supply device 601 delivers a spray liquid containing surfactants, which forms a fine mist through the upward-sloping spray pipe, and fully mixes and contacts with the spiraling exhaust gas. The dust concentration of the treated exhaust gas is significantly reduced, meeting the purification requirements. In the cleaning mode, the turbulence box 604 returns to the vertical state, and the drain pipe 605 is adjusted to spray high-pressure water vertically, which can effectively remove the deposits on the cylinder wall.

[0035] Filtering component 4 includes: Two symmetrically arranged isolation plates 410 are installed inside the top box 1, dividing the top box 1 into three spaces: a processing area in the middle, and backwash areas symmetrically distributed on both sides of the processing area. A sliding groove is provided in the middle of the isolation plate 410. Two filler plates 405 are connected to each other and are slidably connected in the sliding groove. The filler plates 405 periodically move back and forth between the treatment zone and the backflushing zone to perform secondary treatment and drying of the exhaust gas. Heating air box 401 is installed on the top of top box 1 and located above the backflow zone. The bottom of heating air box 401 is connected to a first connecting pipe. The other end of the first connecting pipe extends into the backflow zone and is connected to a fixed pipe 402. The fixed pipe 402 is connected to the top of the inner wall of top box 1. The oscillating pipe 403 is rotatably connected below the fixed pipe 402, and the oscillating pipe 403 and the fixed pipe 402 are connected by a second connecting pipe. It is used to output hot air and reverse flush the filling plate 405 to remove the impurities adsorbed by the filling plate 405.

[0036] Two symmetrically arranged drive racks 404 are connected to the side of the filler plate 405; Two fixed slide rods 409 are connected inside the top box 1, and the fixed slide rods 409 are slidably connected to the drive rack 404; Two sealing groove seats 408 are connected between two isolation plates 410. A drive rack 404 is slidably connected in the sealing groove seat 408 to ensure the sealing of the processing area.

[0037] Drive motor 406 is installed on one side of the top box 1; The drive gear 407 is connected to one end of the output shaft of the drive motor 406. The drive gear 407 passes through the top box 1 and the sealing groove seat 408, and meshes with the drive rack 404.

[0038] The specific implementation method is as follows: The waste gas treatment system includes a treatment cylinder 7 and a top box 1 that are interconnected. Industrial waste gas first enters the treatment cylinder 7 for pretreatment, and then enters the treatment zone of the top box 1. The treatment zone is equipped with two sets of movable packing plates 405. The packing plates 405 are made of composite adsorption material, which can effectively intercept volatile organic compounds and water vapor in the waste gas. The drive mechanism uses a motor to drive a gear and rack transmission, causing the two sets of packing plates 405 to move alternately between the treatment zone and the backflushing zone, ensuring that waste gas treatment and packing regeneration are carried out synchronously. When the packing plates 405 enter the backflushing zone, the heating air box 40... 1. A hot gas flow is delivered to the backflushing zone through an adjustable pipeline system. The hot gas flow acts evenly on the surface of the packing material, causing the adsorbed pollutants to desorb and be discharged with the gas flow. The desorbed mixed gas is transported to an external recovery device through a closed pipeline, where it undergoes condensation and adsorption treatment to achieve resource recovery. The system is equipped with an automatic control module that monitors the treatment effect in real time and dynamically adjusts the operating parameters to ensure stable and efficient waste gas treatment. Practical applications show that this system can continuously purify high-humidity, high-concentration industrial waste gas, while realizing online regeneration of the adsorption material and recycling of pollutants. Compared with traditional waste gas treatment methods, it has better overall performance.

[0039] Adjustment component 9 includes: Multiple connecting rods 902 are hinged to one side of the swing pipe 403; Electric actuator 901 is installed on the top of top box 1, and the output end of electric actuator 901 is hinged to the other end of connecting rod 902.

[0040] Two recycling pipes 5 are connected to both sides of the top box 1 and connected to an external recycling device for recycling the impurities processed by the filter assembly 4. Exhaust pipe 3 is connected to the top of top box 1 and is used to discharge the treated gas.

[0041] The specific implementation method is as follows: the electric push rod 901 drives the connecting rod 902 to adjust the air outlet direction of the swing pipe 403, which can accurately control the hot air jet angle and ensure that the hot air evenly covers the surface of the filler plate 405, significantly improving the backflushing regeneration efficiency. At the same time, the dynamically adjusted air outlet direction can perform differentiated purging for different areas of the filler plate 405 with different degrees of blockage, avoiding local overheating or cleaning dead corners.

[0042] A method for treating exhaust gas from a painting line includes the following steps: S1. The exhaust gas from the painting line enters the treatment cylinder 7 tangentially through the air intake pipe 8. Under the combined action of the vortex fan 620 and the baffle box 604, a high-speed spiral upward airflow is formed, and the dust particles in the exhaust gas are thrown towards the cylinder wall under the action of centrifugal force. S2. The fixed motor 602 drives the rotating empty pipe 603 to rotate the drain pipe 605. The spray liquid provided by the water supply device 601 enters the water supply pipe 608 through the fixed slip ring 606 and the rotating slip ring 607, and is transported to the spray pipe of the drain pipe 605 through the rotating hose 610 and sprayed out. The wet cylinder wall absorbs dust and forms a liquid film that flows down the inner wall and is discharged. S3. The pre-treated exhaust gas enters the treatment area of ​​the top box 1. The drive motor 406 drives the two filling plates 405 to move back and forth periodically in the sliding groove through the drive gear 407 and drive rack 404. When the filling plate 405 moves to the backflush area, the hot air from the heating air box 401 is blown out through the fixed pipe 402 and the swing pipe 403. S4. The electric push rod 901 adjusts the angle of the swing pipe 403 through the connecting rod 902 to make it accurately align with the filling plate 405 for reverse blowing. The removed impurities are discharged through the recovery pipe 5, and the clean gas is discharged through the exhaust pipe 3.

[0043] Working principle: During use, the operator connects the exhaust pipe of the painting line to the intake pipe 8. The exhaust gas enters the treatment cylinder 7 tangentially through the intake pipe 8, forming an initial spiral airflow. During this process, the lifting push rod 612 drives the moving rack 609 to move, which in turn drives the transmission gear 611 to rotate. The transmission gear 611 drives the rotating hose 610, the hollow shaft 614, and the baffle box 604 to rotate, causing the baffle box 604 to deflect. The baffle box 604 drives the moving rod 613 to rotate on the surface of the drive ring 615, causing the moving rod 613 to move out of the inclined groove and thus move the moving rod 613 to rotate. 13 moves under the reaction force of the drive ring 615. The moving rod 613 drives the linkage rack 617 to move, and the linkage rack 617 drives the linkage gear 618 to rotate. The linkage gear 618 drives the drain pipe 605 to rotate through the transmission mechanism 619, causing the drain pipe 605 to change its posture in the turbulence box 604, so that the drain pipe 605 sprays the spray liquid in the treatment cylinder 7 at an oblique upward direction. During this process, the water supply device 601 delivers the spray liquid to the fixed slip ring 606. The spray liquid is delivered to the spray pipe and sprayed out through the rotating slip ring 607, the water supply pipe 608 and the rotating hose 610. After entering the treatment cylinder 7, the fixed motor 602 drives the rotating empty pipe 603 and the vortex fan 620 to rotate. The vortex fan 620 assists in drawing the exhaust gas to form a spiral airflow. Simultaneously, the rotating empty pipe 603 drives the turbulence box 604 to rotate. At this time, the turbulence box 604 is in an inclined position, and its rotation increases the spiral airflow formation, causing particles in the exhaust gas to fly towards the inner wall of the treatment cylinder 7 under centrifugal force and adhere to it. During this process, the length of the drain pipe 605 is parallel to the turbulence box 604, and the spray pipe opening faces upwards, allowing the spray liquid to be sprayed and diffused upwards. It can better contact and mix with the exhaust gas, thereby adsorbing the dust particles in it. Under the action of centrifugal force, it is thrown towards the inner wall of the treatment cylinder 7 and slides down the inner wall of the treatment cylinder 7 under the action of gravity. After the exhaust gas is treated, the moving rack 609 is reset under the drive of the lifting push rod 612. The moving rack 609 drives the turbulence box 604 and the drain pipe 605 to reset through the transmission gear 611, so that the turbulence box 604 is parallel to the length direction of the rotating empty pipe 603, and the drain pipe 605 is vertically facing the inner wall of the treatment cylinder 7, so that the spray liquid can clean the inner wall of the treatment cylinder 7 in a vertical direction in a jet manner.

[0044] After being treated in the treatment cylinder 7, the exhaust gas enters the treatment zone in the top box 1. The exhaust gas comes into contact with the packing plates 405, which intercept and adsorb water vapor and VOCs in the exhaust gas. The filtered gas is then discharged through the exhaust pipe 3. During this process, the drive motor 406 drives the drive gear 407 to rotate periodically back and forth. The drive gear 407 drives the drive rack 404 to move back and forth, which in turn drives the two packing plates 405 to move back and forth. This allows the two packing plates 405 to move periodically between the treatment zone and the backflushing zone. The waste gas is treated internally. After the filler plate 405 enters the backflushing zone, the heating air box 401 delivers hot air to the swing pipe 403 through the fixed pipe 402. The hot air flows back and sweeps the filler plate 405, which can flush out the VOCs and water vapor adsorbed in the filler plate 405 and clean it. This completes the hot air regeneration of the filter material of the filler plate 405, and allows the VOCs and water vapor to be discharged to the external recycling device through the discharge pipe. During this process, the electric push rod 901 drives the connecting rod 902 to adjust the air outlet direction of the swing pipe 403, thereby improving the regeneration effect of the filler plate 405.

[0045] The above description is only a preferred specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any technician familiar with the technical field, within the technical scope disclosed by the present invention, who makes equivalent replacements or changes based on the technical solution and inventive concept of the present invention, should be covered by the scope of protection of the present invention.

Claims

1. A waste gas treatment system for a painting line, comprising a frame body (2), characterized in that, Also includes: Top box (1), installed on top of frame body (2); The treatment cylinder (7) is installed at the center of the frame body (2) and is used for preliminary treatment of exhaust gas; The dust removal component (6) is installed inside the treatment cylinder (7), so that the exhaust gas enters the treatment cylinder (7) and forms a spiral upward airflow. Using centrifugal force in conjunction with the spray liquid, the particulate dust in the exhaust gas adheres to the inner wall of the treatment cylinder (7) and is discharged from the bottom of the treatment cylinder (7) under the action of gravity. The filter assembly (4) is installed in the top box (1) and is used for secondary treatment and drying of the pre-treated exhaust gas; Adjustment component (9) is set on one side of filter component (4) to adjust the air outlet effect of filter component (4); The air inlet pipe (8) is tangentially connected to the treatment cylinder (7) and connected to the exhaust pipe of the painting line. It is used to allow the exhaust gas to enter the treatment cylinder (7) along the tangential direction of the treatment cylinder (7) so that the exhaust gas can form a spiral airflow.

2. The exhaust gas treatment system for a coating line according to claim 1, characterized in that, The dust removal component (6) includes: A vortex fan (620) is rotatably connected to the top of the treatment cylinder (7) to cooperate with the air intake pipe (8) to make the exhaust gas form a spiral upward airflow; Rotate the empty tube (603) and connect it to the bottom of the vortex fan (620); Two sets of symmetrically arranged baffle boxes (604) are provided. Each set of baffle boxes (604) consists of multiple baffle boxes (604) arranged in a linear array. Each independent baffle box (604) is rotatably connected to a rotating hollow tube (603). A hollow shaft (614) is connected to one side of the baffle box (604). The hollow shaft (614) is rotatably connected to the rotating hollow tube (603) and extends into the rotating hollow tube (603). After the baffle box (604) deflects itself, it can help enhance the spiral effect of the exhaust gas in the treatment cylinder (7) under the drive of the rotating hollow tube (603). The drain pipe (605) is rotatably connected to the turbulence box (604). A number of spray pipes arranged in a linear array are connected to one side of the drain pipe (605) to spray out the spray liquid to clean the inner wall of the treatment cylinder (7) or to adsorb dust particles in the exhaust gas. A water supply pipe (608) is connected inside a rotating hollow pipe (603) and is used to deliver spray liquid into a drain pipe (605). Multiple rotating hoses (610) arranged in a linear array are connected to both sides of the water supply pipe (608). The rotating hoses (610) are connected to the inner wall of the hollow shaft (614), and the other end of the rotating hoses (610) is connected to one side of the drain pipe (605). Water supply device (601), two water supply devices (601) are symmetrically distributed on both sides of the frame body (2) for conveying spray liquid into the water pipe (608); A fixed motor (602) is mounted on the bottom of the processing cylinder (7) via a mounting plate. One end of the output shaft of the fixed motor (602) is connected to the bottom of the rotating tube (603) to drive the rotating tube (603) and the vortex fan (620) to rotate. A transmission gear (611) is connected to the outer surface of the hollow shaft (614) and located inside the rotating hollow tube (603). Multiple transmission gears (611) are meshed with the same movable rack (609) on one side. One end of the movable rack (609) is connected to a lifting push rod (612). One side of the lifting push rod (612) is connected to the inner wall of the rotating hollow tube (603) through an assembly plate, and is used to drive the spoiler box (604) to deflect through the hollow shaft (614).

3. The exhaust gas treatment system for a coating line according to claim 2, characterized in that, The dust removal assembly (6) also includes: The transmission mechanism (619) includes a first synchronous pulley, a second synchronous pulley and a synchronous belt. The first synchronous pulley is connected to the drain pipe (605), the second synchronous pulley is located inside the spoiler box (604) and is rotatably connected to the inner wall of the spoiler box (604), and the synchronous belt is connected between the first synchronous pulley and the second synchronous pulley. A linkage gear (618) is installed on one side of the second synchronous pulley. A linkage rack (617) is meshed on one side of the linkage gear (618). A movable plate is connected to the bottom of the linkage rack (617). A movable rod (613) is connected to one side of the movable plate. One end of the movable rod (613) extends to the outside of the spoiler box (604). A reset spring (616) is sleeved on the outer surface of the movable rod (613). The two ends of the reset spring (616) are respectively connected to one side of the movable plate and one side of the inner wall of the spoiler box (604). The drive ring (615) is connected to the outer surface of the rotating hollow tube (603) and is coaxial with the hollow shaft (614). The drive ring (615) has inclined grooves on both sides, and the moving rod (613) is moved by the change of height.

4. The exhaust gas treatment system for a coating line according to claim 2, characterized in that, The dust removal assembly (6) also includes: A rotating slip ring (607) is connected to the outer surface of the bottom of the rotating empty pipe (603), and the rotating slip ring (607) is connected to the water supply pipe (608) through a connecting pipe; A fixed slip ring (606) is disposed inside the processing cylinder (7) and is rotatably connected to the rotating slip ring (607) and communicates with the rotating slip ring (607); The supporting pipes are located on both sides of the fixed slip ring (606) and connected to the fixed slip ring (606). The other end of the supporting pipe extends to the outside of the treatment cylinder (7) and is connected to one side of the water supply device (601).

5. The exhaust gas treatment system for a coating line according to claim 1, characterized in that, The filtering component (4) includes: Two symmetrically arranged isolation plates (410) are installed inside the top box (1) and divide the top box (1) into three spaces: the processing area in the middle, the backwash area symmetrically distributed on both sides of the processing area, and a sliding groove is provided in the middle of the isolation plate (410). Two filler plates (405) are connected to each other and are slidably connected in the sliding groove. The filler plates (405) periodically move back and forth between the treatment zone and the backflushing zone. The filler plates (405) perform secondary treatment and drying of the exhaust gas. Heating air box (401) is installed on the top of the top box (1) and located above the backflushing zone. The bottom of the heating air box (401) is connected to a first connecting pipe. The other end of the first connecting pipe extends into the backflushing zone and is connected to a fixed pipe (402). The fixed pipe (402) is connected to the top of the inner wall of the top box (1). The swing pipe (403) is rotatably connected to the bottom of the fixed pipe (402), and the swing pipe (403) and the fixed pipe (402) are connected by a second connecting pipe. It is used to output hot air and perform reverse flushing on the filler plate (405) to remove the impurities adsorbed on the filler plate (405).

6. The exhaust gas treatment system for a coating line according to claim 5, characterized in that, The filtering component (4) further includes: Two symmetrically arranged drive racks (404) are connected to the side of the filler plate (405); Two fixed slide rods (409) are connected inside the top box (1) and are slidably connected to the drive rack (404); Two sealing slots (408) are connected between two partition plates (410), and a drive rack (404) is slidably connected in the sealing slots (408) to ensure the sealing of the processing area.

7. The exhaust gas treatment system for a coating line according to claim 6, characterized in that, The filtering component (4) further includes: The drive motor (406) is installed on one side of the top box (1); The drive gear (407) is connected to one end of the output shaft of the drive motor (406). The drive gear (407) passes through the top box (1) and the sealing groove seat (408) and meshes with the drive rack (404).

8. The exhaust gas treatment system for a coating line according to claim 1, characterized in that, The adjustment component (9) includes: Multiple links (902) are hinged to one side of the swing pipe (403); An electric actuator (901) is installed on the top of the top box (1), and the output end of the electric actuator (901) is hinged to the other end of the connecting rod (902).

9. The exhaust gas treatment system for a coating line according to claim 1, characterized in that, Also includes: Two recycling pipes (5) are connected to both sides of the top box (1) and connected to an external recycling device for recycling the impurities processed by the filter assembly (4); An exhaust pipe (3) is connected to the top of the top box (1) and is used to discharge the treated gas.

10. A method for treating exhaust gas from a painting line, characterized in that, An exhaust gas treatment system for a painting line according to any one of claims 1-9 includes the following steps: S1. The exhaust gas from the painting line enters the treatment cylinder (7) tangentially through the air intake pipe (8). Under the combined action of the vortex fan (620) and the turbulence box (604), a high-speed spiral upward airflow is formed. The dust particles in the exhaust gas are thrown towards the cylinder wall under the action of centrifugal force. S2. The fixed motor (602) drives the rotating empty pipe (603) to rotate the drain pipe (605). The spray liquid provided by the water supply device (601) enters the water supply pipe (608) through the fixed slip ring (606) and the rotating slip ring (607), and is transported to the spray pipe of the drain pipe (605) through the rotating hose (610) and sprayed out. The wet cylinder wall absorbs dust and forms a liquid film that flows down the inner wall and is discharged. S3. The pre-treated exhaust gas enters the treatment area of ​​the top box (1). The drive motor (406) drives the two filling plates (405) to move back and forth periodically in the sliding groove through the drive gear (407) and drive rack (404). When the filling plate (405) moves to the backflush area, the hot air from the heating air box (401) is blown out through the fixed pipe (402) and the swing pipe (403). S4. The electric push rod (901) adjusts the angle of the swing pipe (403) through the connecting rod (902) to make it accurately align with the filler plate (405) for reverse blowing. The removed impurities are discharged through the recovery pipe (5), and the clean gas is discharged through the exhaust pipe (3).

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