Waste gas treatment equipment and process for processing easy-to-clean PVC (polyvinyl chloride) composite coated cloth

Abstract

The invention discloses waste gas treatment equipment and technology based on easy-to-clean PVC composite coated fabric processing, the waste gas treatment equipment comprises a waste gas treatment tower composed of a supporting base, a treatment tank and a purification tank, a waste gas treatment mechanism is arranged in the treatment tank to achieve treatment of harmful gas generated during PVC composite coated fabric processing, and the invention relates to the technical field of waste gas treatment. According to the waste gas treatment equipment and process based on easy-to-clean PVC composite coated cloth processing, a chemical solvent of the lower treatment part fully reacts with waste gas, acidic pollutants are effectively neutralized, meanwhile, stirring blades are driven by a driving part to enhance the mixing efficiency, the situation that the local concentration is too high, and the waste gas is easily cleaned is avoided. The design of the sealing unit ensures that the waste gas inlet pipe is opened only under the pressure of waste gas, the waste gas inlet pipe is automatically closed by twisting a spring when no waste gas exists, equipment corrosion or safety accidents caused by backflow of a chemical solvent are prevented, the rotation angle of the sealing plate is limited through cooperative work of a blocking part and a limiting part, excessive opening and closing are avoided, and the reliability is improved.

Description

Technical Field

[0001] This invention relates to the field of waste gas treatment technology, specifically to waste gas treatment equipment and processes for processing easy-to-clean PVC composite coated fabric. Background Technology

[0002] Easy-clean PVC composite coated fabric requires coating, drying, and shaping processes during production. The drying process releases a large amount of high-temperature waste gas containing VOCs such as styrene and toluene, as well as chlorine-containing pollutants such as hydrogen chloride and dioxin precursors. This type of waste gas is characterized by complex composition, strong corrosiveness, and large concentration fluctuations.

[0003] The reference patent, titled "A Waste Gas Treatment Device for Ion Exchange Resin Production" (Patent Publication No.: CN121130537A, Patent Publication Date: 2025-12-16), includes a purification chamber. Two connecting pipes are symmetrically installed on the outer surface of the purification chamber. An activated carbon bag removal component is embedded inside the purification chamber. The activated carbon bag removal component includes an insertion hole located in the center of one surface of the purification chamber. Four constraint ports are symmetrically reserved on the inner surface of the insertion hole, and an outer fixing cylinder is embedded inside the insertion hole. A constraint strip is installed on the outer surface of the outer fixing cylinder near the inner side of the constraint ports, and the constraint ports and constraint strips cooperate. Through the cooperation of the activated carbon bag removal component and the magnetic disk, not only can the activated carbon bag be removed in a sealed state, preventing the exhaust gas from escaping from the activated carbon bag, but the purification chamber is also sealed after the activated carbon bag is removed, preventing the escape of unpurified exhaust gas from the purification chamber and ensuring the respiratory safety of the personnel.

[0004] Based on the description in the above documents, although spraying can dissolve some of the harmful gases generated during the processing of existing PVC composite coated fabrics, other gases still pollute the atmosphere. Furthermore, solvent treatment lacks a backflow prevention mechanism, which can easily cause chemical solvent backflow and affect safety. Therefore, this invention provides a waste gas treatment device and process for easy-to-clean PVC composite coated fabric processing. Summary of the Invention

[0005] To address the shortcomings of existing technologies, this invention provides a waste gas treatment device and process for the processing of easy-clean PVC composite coated fabric. This solves the problem that while spraying can dissolve some of the harmful gases generated during the processing of PVC composite coated fabric, other gases still pollute the atmosphere. Furthermore, solvent treatment lacks an anti-backflow mechanism, which can easily cause chemical solvent backflow and affect safety.

[0006] To achieve the above objectives, the present invention provides the following technical solution: A waste gas treatment device for easy-clean PVC composite coated fabric processing, comprising a waste gas treatment tower consisting of a support base, a treatment tank, and a purification tank. The treatment tank contains a waste gas treatment mechanism to treat harmful gases generated during the processing of PVC composite coated fabric. The waste gas treatment mechanism includes: The lower treatment unit includes an exhaust plate, and the top of the exhaust plate is driven to rotate by a drive component. Exhaust holes are equidistantly opened at opposite points in the rotation direction of the exhaust plate. An exhaust gas inlet pipe is connected to the center of the bottom of the treatment tank. The inner side of the exhaust plate is rotatably connected to the exhaust gas inlet pipe. A sealing unit is provided at the port of the exhaust gas inlet pipe and the exhaust plate to prevent water from flowing back into the exhaust gas inlet pipe. The upper purification section is used to further purify the gas after it has been processed by the lower treatment section.

[0007] Preferably, an exhaust gas connecting pipe is installed on the bottom side of the support base, and the exhaust gas connecting pipe is fixed to the bottom end of the exhaust gas inlet pipe. An inlet pipe is fixedly connected to the surface of the treatment tank to enable the feeding of external chemical solvents and achieve purification treatment of harmful gases.

[0008] Preferably, the purification tank is divided into an equipment chamber and a purification chamber. The equipment chamber is used to house electrical components for operation, while the purification chamber uses purification particles to adsorb the gas processed by the lower processing unit. A feed pipe is fixedly connected to the surface of the purification tank at the height of the purification chamber to introduce the purification particles.

[0009] Preferably, the driving element includes: The drive motor is fixedly installed on the bottom partition of the equipment room, and one end of the output shaft of the drive motor is connected to the drive shaft via a coupling. The drive shaft passes through the bottom partition of the equipment room and extends into the processing tank. The stirring rod is fixed at the center of the top of the exhaust plate at its bottom end, and fixedly connected to the drive shaft at its top end via a coupling. The surface of the stirring rod is equipped with stirring blades to achieve the fusion of harmful gases and chemical solvents.

[0010] Preferably, the sealing unit includes: A sealing plate is located at the upper end of the exhaust gas inlet pipe, and a rotating rod is installed on the arc surface of the sealing plate. The rotating rod is rotatably connected to the exhaust gas inlet pipe, and a torsion spring is sleeved on the surface of the rotating rod. The two ends of the torsion spring are rotatably connected to the opposite sides of the sealing plate and the exhaust gas inlet pipe. The restoring force of the torsion spring, when not affected by external force, keeps the sealing plate in a horizontal state and seals the upper end of the exhaust gas inlet pipe. A stop is provided at the sealing plate and the exhaust gas inlet pipe to limit the rotation angle of the sealing plate. A limiting component is installed at the sealing plate and the exhaust gas inlet pipe to prevent the sealing plate from rotating further when it reaches the vertical direction.

[0011] Preferably, the stop component includes a protrusion fixedly installed inside the exhaust gas inlet pipe, and the surface of the sealing plate is provided with a groove of a size adapted to the protrusion. The left side of the sealing plate restricts the lower side, and the right side of the sealing plate restricts the upper side, so as to keep the sealing plate rotating only clockwise.

[0012] Preferably, the limiting member includes: The fixed block has a placement slot at the top, and the inside of the placement slot is connected to a limit strip via a buffer component; The limiting plate is fixedly installed at the bottom of the inner cavity of the exhaust plate and located on one side of the rotation center line of the sealing plate. After the sealing plate rotates, the limiting strip contacts the limiting plate to restrict the sealing plate to remain vertical and realize the opening of the exhaust gas inlet pipe.

[0013] Preferably, the buffer includes sleeves symmetrically installed at the bottom of the limiting strip, and support columns symmetrically installed on the inner side of the placement groove. The support columns extend into the interior of the sleeve and are fitted with abutment plates. An abutment spring is installed between the abutment plate and the opposite side of the sleeve. The restoring force of the abutment spring, when not affected by other external forces, causes the limiting strip to move upward.

[0014] Preferably, the upper purification unit includes a transfer pump fixedly installed on the bottom side partition of the equipment chamber and located next to the drive motor. The air inlet of the transfer pump is connected to a transfer pipe that extends through to the treatment tank without contacting the solution in the tank. The air outlet of the transfer pump is connected to an air outlet pipe that extends into the purification chamber, and a filter screen is installed at the port of the air outlet pipe.

[0015] This invention also discloses a waste gas treatment process for processing easy-to-clean PVC composite coated fabric, specifically including the following steps: S1. The waste gas generated during the processing of PVC composite coated fabric is transmitted to the treatment tank through a pipeline, and the waste gas is purified through the lower treatment section. S2. The exhaust gas, after being treated by the chemical solvent, is further purified by the upper purification section after passing upward through the solvent surface, and is then discharged and tested after treatment. S3. Once the test results meet the standards, the wastewater will be discharged. If the results do not meet the standards, the wastewater will be returned through the pipeline for further purification.

[0016] This invention provides waste gas treatment equipment and process for processing easy-to-clean PVC composite coated fabric. Compared with the prior art, it has the following advantages: 1. This waste gas treatment equipment and process based on easy-clean PVC composite coated fabric processing effectively neutralizes acidic pollutants by fully reacting the chemical solvent in the lower treatment section with the waste gas. At the same time, the stirring blades, driven by the drive unit, enhance the mixing efficiency and avoid excessively high local concentrations. The design of the sealing unit ensures that the waste gas inlet pipe only opens under waste gas pressure and automatically closes by a torsion spring when there is no waste gas, preventing chemical solvent backflow that could cause equipment corrosion or safety accidents. The coordinated work of the stop and limit components restricts the rotation angle of the sealing plate, avoiding excessive opening and closing and improving reliability.

[0017] 2. This waste gas treatment equipment and process based on easy-clean PVC composite coated cloth processing uses a limiting component. After the sealing plate rotates, the limiting strip contacts the limiting plate to restrict the sealing plate to remain vertical, thereby opening the waste gas inlet pipe and preventing the waste gas from blowing the sealing plate back and forth. In addition, a buffer component is used to protect the sealing plate during instantaneous blowing operations, ensuring that the sealing plate is less damaged.

[0018] 3. The waste gas treatment equipment and process based on easy-clean PVC composite coated cloth processing uses a transfer pump in the upper purification section to send the pre-treated gas into the purification chamber for secondary adsorption, adapting to concentration fluctuations and ensuring that emissions meet the requirements. This effectively improves the completeness of waste gas treatment. At the same time, the overall structure of the waste gas treatment is compact, with low energy consumption, and can better ensure the stability of continuous operation. Attached Figure Description

[0019] Figure 1 This is a three-dimensional structural diagram of the present invention; Figure 2 This is a cross-sectional view of the internal structure of the present invention; Figure 3 This is a three-dimensional structural diagram of the driving component of the present invention; Figure 4 This is a partial three-dimensional structural diagram of the lower processing unit of the present invention; Figure 5 This is a three-dimensional structural diagram of the support base of the present invention; Figure 6 This is a three-dimensional structural diagram of the exhaust plate of the present invention; Figure 7 This is a cross-sectional view of the exhaust plate of the present invention; Figure 8 This is an overall structural diagram of the sealing unit of the present invention; Figure 9 This is a three-dimensional structural exploded view of the sealing unit of the present invention; Figure 10 This is a three-dimensional structural exploded view of the limiting component of the present invention; Figure 11 For the present invention Figure 10 Enlarged view of the local structure at point A in the middle.

[0020] In the diagram: 1-Support base, 2-Processing tank, 3-Purification tank, 31-Equipment room, 32-Purification chamber, 33-Feed pipe, 4-Lower processing section, 41-Exhaust plate, 42-Drive component, 421-Drive motor, 422-Drive shaft, 423-Agitator rod, 424-Agitator blade, 43-Exhaust port, 44-Waste gas inlet pipe, 5-Sealing unit, 51-Sealing plate, 52-Rotating rod, 53-Torsion spring, 54 - Gear, 541- Protrusion, 542- Groove, 55- Limiting component, 551- Fixing block, 552- Placement slot, 553- Buffer component, 5531- Sleeve, 5532- Support column, 5533- Abutting plate, 5534- Abutting spring, 554- Limiting strip, 555- Limiting plate, 6- Upper purification section, 61- Transfer pump, 62- Transfer pipe, 63- Exhaust pipe, 7- Waste gas connecting pipe, 8- Liquid inlet pipe. Detailed Implementation

[0021] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0022] Please see Figures 1-11 This invention provides two technical solutions: Example 1: A waste gas treatment device for processing easy-to-clean PVC composite coated fabric includes a waste gas treatment tower consisting of a support base 1, a treatment tank 2, and a purification tank 3. The treatment tank 2 is equipped with a waste gas treatment mechanism to treat harmful gases generated during the processing of PVC composite coated fabric. The waste gas treatment mechanism includes: The lower processing unit 4 includes an exhaust plate 41, and the top of the exhaust plate 41 is driven to rotate by a drive member 42. Exhaust holes 43 are equidistantly opened at opposite points in the rotation direction of the exhaust plate 41. An exhaust gas inlet pipe 44 is connected to the center of the bottom of the processing tank 2. The inner side of the exhaust plate 41 is rotatably connected to the connection point of the exhaust gas inlet pipe 44. A sealing unit 5 is provided at the port of the exhaust gas inlet pipe 44 and the exhaust plate 41 to prevent water from flowing back into the exhaust gas inlet pipe 44. The upper purification unit 6 is used to further purify the gas processed by the lower processing unit 4.

[0023] The chemical solvent in the lower treatment unit 4 reacts fully with the exhaust gas to effectively neutralize acidic pollutants. At the same time, the stirring blade 424, driven by the drive unit 42, enhances the mixing efficiency and avoids excessively high local concentrations. The design of the sealing unit 5 ensures that the exhaust gas inlet pipe 44 only opens under exhaust gas pressure and automatically closes when there is no exhaust gas by the torsion spring 53, preventing backflow of chemical solvents that could cause equipment corrosion or safety accidents. The coordinated work of the stop component 54 and the limit component 55 restricts the rotation angle of the sealing plate 51, preventing excessive opening and closing and improving reliability.

[0024] After the drive motor 421 is started and electrically connected to the built-in power supply, the transfer pump 61 is also electrically connected to the built-in power supply. The built-in power supply can be electrically connected to an external power source through a port. The drive shaft 422 drives the stirring rod 423 at an adjustable speed, such as 50-200 rpm, so that the stirring blade 424 forms a vortex, which enhances the gas-liquid contact area. The exhaust port 43 is designed at the "opposite" position of the exhaust plate 41 to avoid the solution from blocking the channel and to ensure that the exhaust gas is evenly dispersed. The chemical solvent introduced by the liquid inlet pipe 8 can be adjusted according to the composition of the exhaust gas. The liquid level in the treatment tank 2 is controlled by a sensor to prevent overflow.

[0025] In this embodiment of the invention, an exhaust gas connecting pipe 7 is installed on the bottom side of the support base 1, and the exhaust gas connecting pipe 7 is fixed to the bottom end port of the exhaust gas inlet pipe 44. The surface of the treatment tank 2 is fixedly connected to a liquid inlet pipe 8 for feeding external chemical solvents to achieve purification treatment of harmful gases.

[0026] In this embodiment of the invention, the purification tank 3 is divided into an equipment chamber 31 and a purification chamber 32. The equipment chamber 31 is used to place electrical components to enable operation, while the purification chamber 32 is used to adsorb the gas processed by the lower processing unit 4 by placing purification particles. The surface of the purification tank 3 is fixedly connected to the feed pipe 33 at the height of the purification chamber 32 to introduce the purification particles.

[0027] The equipment chamber 31 of the purification tank 3 can be opened for easy maintenance of electrical components such as the drive motor 421. The liquid inlet pipe 8 and the feed pipe 33 are equipped with quick connectors to simplify the solvent and adsorbent replacement process and reduce downtime.

[0028] In this embodiment of the invention, the driving element 42 includes: The drive motor 421 is fixedly installed on the bottom partition of the equipment chamber 31, and one end of the output shaft of the drive motor 421 is connected to the drive shaft 422 via a coupling. The drive shaft 422 passes through the bottom partition of the equipment chamber 31 and extends into the processing tank 2. The bottom end of the stirring rod 423 is fixed to the center of the top of the exhaust plate 41, and the top end is fixedly connected to the drive shaft 422 through a coupling. The surface of the stirring rod 423 is equipped with stirring blades 424 to achieve the fusion of harmful gases and chemical solvents.

[0029] In this embodiment of the invention, the sealing unit 5 includes: A sealing plate 51 is located at the upper end of the exhaust gas inlet pipe 44, and a rotating rod 52 is installed on the arc surface of the sealing plate 51. The rotating rod 52 is rotatably connected to the exhaust gas inlet pipe 44, and a torsion spring 53 is sleeved on the surface of the rotating rod 52. The two ends of the torsion spring 53 are rotatably connected to the opposite sides of the sealing plate 51 and the exhaust gas inlet pipe 44. The restoring force of the torsion spring 53, when not affected by external force, keeps the sealing plate 51 in a horizontal state and seals the upper end of the exhaust gas inlet pipe 44. A stopper 54 is provided at the sealing plate 51 and the exhaust gas inlet pipe 44 to limit the rotation angle of the sealing plate 51. The limiting component 55 is installed at the sealing plate 51 and the exhaust gas inlet pipe 44 to prevent the sealing plate 51 from rotating when it reaches the vertical direction.

[0030] When the exhaust gas pressure is greater than the spring force, the sealing plate 51 rotates clockwise around the rotating rod 52, and the protrusion 541 engages with the groove 542 to prevent the sealing plate 51 from tilting too much and causing a gap that leads to backflow. The abutment spring 5534 provides a buffer when the limit bar 554 contacts the limit plate 555 to avoid hard impact damage to the components.

[0031] In this embodiment of the invention, the stop member 54 includes a protrusion 541 fixedly installed inside the exhaust gas inlet pipe 44, and the surface of the sealing plate 51 is provided with a groove 542 that is adapted to the size of the protrusion 541. The left side of the sealing plate 51 restricts the lower side, and the right side of the sealing plate 51 restricts the upper side, so as to keep the sealing plate 51 from rotating clockwise.

[0032] In this embodiment of the invention, the limiting member 55 includes: The fixing block 551 has a placement groove 552 on its top, and the interior of the placement groove 552 is connected to the limit strip 554 through the buffer 553; The limiting plate 555 is fixedly installed at the bottom of the inner cavity of the exhaust plate 41 and located on one side of the rotation center line of the sealing plate 51. The limiting strip 554 contacts the limiting plate 555 after the sealing plate 51 rotates, restricting the sealing plate 51 to remain vertical and realizing the opening of the exhaust gas inlet pipe 44.

[0033] In this embodiment of the invention, the buffer 553 includes a sleeve 5531 symmetrically installed at the bottom of the limiting strip 554, and a support column 5532 symmetrically installed on the inner side of the placement groove 552. The support column 5532 extends into the interior of the sleeve 5531 and is fitted with an abutment plate 5533. An abutment spring 5534 is installed between the abutment plate 5533 and the opposite side of the sleeve 5531. The restoring force of the abutment spring 5534, when not affected by other external forces, causes the limiting strip 554 to move upward.

[0034] By setting a limiting component 55, the limiting strip 554 contacts the limiting plate 555 after the sealing plate 51 rotates, restricting the sealing plate 51 to remain vertical and thus opening the exhaust gas inlet pipe 44. This prevents the exhaust gas from entering and blowing the sealing plate 51 back and forth. In addition, the buffer component 553 protects the sealing plate 51 from instantaneous blowing operations, ensuring that the sealing plate 51 is less damaged.

[0035] In this embodiment of the invention, the upper purification unit 6 includes a transfer pump 61 fixedly installed on the bottom partition of the equipment chamber 31 and located next to the drive motor 421. The air inlet of the transfer pump 61 is connected to a transfer pipe 62 that extends through to the treatment tank 2 without contacting the solution in the tank. The air outlet of the transfer pump 61 is connected to an air outlet pipe 63 that extends into the purification chamber 32. A filter screen is installed at the port of the air outlet pipe 63.

[0036] Among them, the transfer pump 61 is a variable frequency pump, which can automatically adjust the pumping speed according to the gas concentration; the transfer pipe 62 extends to the liquid surface of the treatment tank 2 to avoid liquid intake, and the filter screen at the end of the outlet pipe 63 prevents adsorbent particles from backflowing.

[0037] The pre-treated gas is sent to the purification chamber 32 for secondary adsorption by the upper purification section 6 using the transfer pump 61. This adapts to concentration fluctuations and ensures that emissions meet the standards, thereby effectively improving the completeness of waste gas treatment. At the same time, the overall structure of the waste gas treatment is compact, with low energy consumption, and can better ensure the stability of continuous operation.

[0038] Example 2 differs from Example 1 in that it is based on the waste gas treatment process for processing easy-to-clean PVC composite coated fabric, specifically including the following steps: S1. The waste gas generated during the processing of PVC composite coated fabric is transmitted to the treatment tank 2 through a pipeline, and the waste gas is purified through the lower treatment unit 4. S2, and the exhaust gas treated by the chemical solvent passes upward through the solvent surface and is further purified by the upper purification unit 6, and is discharged and detected after treatment; S3. Once the test results meet the standards, the wastewater will be discharged. If the results do not meet the standards, the wastewater will be returned through the pipeline for further purification.

[0039] Furthermore, any content not described in detail in this specification is existing technology known to those skilled in the art.

[0040] During operation, the waste gas generated from the processing of PVC coated fabric enters the treatment tank 2 through the waste gas inlet pipe 44, and the lower treatment section 4 is responsible for the initial purification. The exhaust plate 41 rotates via the drive component 42, and the drive motor 421 drives the drive shaft 422 and the stirring rod 423, causing the stirring blade 424 to stir the chemical solvent (such as an alkaline solution) and promote the neutralization of acidic pollutants (such as hydrogen chloride) in the exhaust gas. Meanwhile, the exhaust port 43 evenly distributes the exhaust gas to avoid excessively high local concentrations, and the exhaust port 43 is opposite to the direction of rotation to prevent water from being blocked or flowing in. Sealing unit 5 ensures safety: When the exhaust gas pressure pushes the sealing plate 51, the rotating rod 52 overcomes the force of the torsion spring 53, causing the sealing plate 51 to rotate clockwise and open; when there is no exhaust gas, the spring returns to its original position and closes, the protrusion 541 of the stop member 54 cooperates with the groove 542 to limit the rotation angle, so that the sealing plate 51 remains in a horizontal state; the limiting strip 554 of the limiting member 55 contacts the limiting plate 555 through the buffer member 553 to keep the sealing plate 51 in a vertical state, thereby opening the passage for exhaust gas to enter the pipe 44; After preliminary treatment, the gas rises to the upper purification section 6: the transfer pump 61 draws the gas through the transfer pipe 62 and sends it into the purification chamber 32 through the gas outlet pipe 63, where it is filled with adsorbent (such as activated carbon) to further remove residual VOCs.

[0041] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0042] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. The waste gas treatment equipment for processing easy-to-clean type PVC composite coated fabric, comprising a waste gas treatment tower composed of a support base (1), a treatment tank (2) and a purification tank (3), characterized in that: And the inside of the processing tank (2) is provided with waste gas treatment mechanism to realize the treatment of harmful gas generated in the processing of PVC composite coating cloth, the waste gas treatment mechanism comprises: The lower processing part (4) comprises an exhaust plate (41), and the top of the exhaust plate (41) is driven to rotate by a driving member (42). The exhaust plate (41) is provided with exhaust holes (43) at equal intervals at opposite sides of the rotating direction. The bottom center of the processing tank (2) is connected with a waste gas inlet pipe (44), and the inner side of the exhaust plate (41) is rotatably connected with the communication part of the waste gas inlet pipe (44). The port of the waste gas inlet pipe (44) is provided with a sealing unit (5) at the exhaust plate (41) to prevent water from flowing back into the waste gas inlet pipe (44). The upper purification part (6) is used for further purification treatment of the gas treated by the lower processing part (4).

2. The waste gas treatment apparatus for processing based on the easy-to-clean type PVC composite coating cloth according to claim 1, characterized in that: The bottom side of the support seat (1) is provided with a waste gas communication pipe (7), and the bottom end of the waste gas communication pipe (7) is fixed with the waste gas inlet pipe (44). The surface of the processing tank (2) is fixedly connected with a liquid inlet pipe (8) for feeding external chemical solvent to realize the purification treatment of harmful gas.

3. The waste gas treatment apparatus for processing of the easy-to-clean type PVC composite coated fabric according to claim 1, characterized in that: The purification tank (3) is divided into an equipment chamber (31) and a purification chamber (32). The equipment chamber (31) is used for placing electrical elements to realize work. The purification chamber (32) is provided with purification particles to realize adsorption treatment of the gas treated by the lower processing part (4). The surface of the purification tank (3) is fixedly connected with a feeding pipe (33) at the height of the purification chamber (32) to introduce the purification particles.

4. The waste gas treatment apparatus for processing the easy-to-clean type PVC composite coated fabric according to claim 3, characterized in that: The driving member (42) comprises: A driving motor (421) is fixedly installed at the bottom side of the bottom side of the equipment chamber (31). One end of the output shaft of the driving motor (421) is provided with a driving shaft (422) through a shaft coupling. The driving shaft (422) penetrates the bottom side of the equipment chamber (31) and extends into the processing tank (2). A stirring rod (423) is fixedly connected with the center of the top of the exhaust plate (41). The top end of the stirring rod (423) is fixedly connected with the driving shaft (422) through a shaft coupling. The surface of the stirring rod (423) is provided with stirring blades (424) to realize the fusion of harmful gas and chemical solvent.

5. The exhaust gas treatment apparatus for processing based on the easy-to-clean type PVC composite coated fabric according to claim 1, characterized in that: The sealing unit (5) comprises: A sealing plate (51) is arranged at the upper port of the waste gas inlet pipe (44). A rotating rod (52) is arranged at the circular surface of the sealing plate (51). The rotating rod (52) is rotatably connected with the waste gas inlet pipe (44). A torsion spring (53) is arranged on the surface of the rotating rod (52). The two ends of the torsion spring (53) are rotatably connected with the sealing plate (51) and the waste gas inlet pipe (44). The restoring force of the torsion spring (53) under the condition of no external force makes the sealing plate (51) keep horizontal state and seal the upper port of the waste gas inlet pipe (44). The sealing plate (51) and the waste gas inlet pipe (44) are provided with a stop member (54) to limit the rotation angle of the sealing plate (51). A limiting member (55) is arranged at the sealing plate (51) and the waste gas inlet pipe (44) to limit the rotation of the sealing plate (51) to the vertical direction.

6. The exhaust gas treatment apparatus for processing based on the easy-to-clean type PVC composite coated fabric according to claim 5, characterized in that: The gear (54) comprises a protrusion (541) fixedly installed at the inner side of the exhaust gas inlet pipe (44), and the surface of the sealing plate (51) is provided with a groove (542) matching the size of the protrusion (541), and the left side limiting lower side of the sealing plate (51) and the right side limiting upper side of the sealing plate (51) are provided to keep the sealing plate (51) only clockwise rotating.

7. The exhaust gas treatment apparatus for processing based on the easy-to-clean type PVC composite coated fabric according to claim 5, characterized in that: The limiting part (55) comprises: A fixed block (551) provided with a placing groove (552) at the top, and the inside of the placing groove (552) is connected to a limiting strip (554) through a buffer (553); A limiting plate (555) fixedly installed at the bottom of the inner cavity of the exhaust plate (41) and located on one side of the rotation center line of the sealing plate (51), and the limiting strip (554) is in contact with the limiting plate (555) after the sealing plate (51) rotates to limit the sealing plate (51) to keep vertical to open the exhaust gas inlet pipe (44).

8. The waste gas treatment apparatus for processing the easy-to-clean type PVC composite coated fabric according to claim 7, characterized in that: The buffer (553) comprises a sleeve (5531) symmetrically installed at the bottom of the limiting strip (554), and the inside of the placing groove (552) is symmetrically provided with a supporting column (5532), and the supporting column (5532) extends into the inside of the sleeve (5531) and is provided with a abutting plate (5533), and the abutting plate (5533) is provided with an abutting spring (5534) on the opposite side of the sleeve (5531), and the restoring force of the abutting spring (5534) under the influence of other external force makes the limiting strip (554) move upward.

9. The exhaust gas treatment apparatus for processing based on the easy-to-clean type PVC composite coated fabric according to claim 4, characterized in that: The upper purification part (6) comprises a transmission pump (61) fixedly installed at the bottom side of the equipment chamber (31) and located beside the driving motor (421), and the gas inlet of the transmission pump (61) is communicated with a transmission pipe (62) extending through the treatment tank (2) and not in contact with the solution in the tank, and the gas outlet of the transmission pump (61) is communicated with an exhaust pipe (63) extending into the purification chamber (32), and a filter screen is installed at the port of the exhaust pipe (63).

10. A process for treating exhaust gas from processing of easy-to-clean PVC composite coated fabric, using the exhaust gas treatment apparatus for processing of easy-to-clean PVC composite coated fabric according to any one of claims 1 to 9, characterized in that: Specifically comprising the following steps: S1, the waste gas generated in the processing of PVC composite coating cloth is transmitted to the treatment tank (2) through the pipeline, and the waste gas is purified by the lower treatment part (4); S2, and the gas treated by the chemical solvent is further purified by the upper purification part (6) through the surface of the solvent, and after the treatment is completed, the exhaust detection is carried out; S3, until the detection meets the standard, the waste gas is discharged, otherwise it is returned to the pipeline for further purification treatment.

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