A VOCs waste gas treatment device and a treatment method

Abstract

The application provides a VOCs waste gas treatment device and treatment method, and belongs to the technical field of VOCs waste gas treatment. The device comprises a treatment box, both ends of which are provided with openings for the entry and exit of waste gas; a main purification unit, a high-temperature heating unit and a post-treatment filter screen are sequentially arranged in the treatment box along the flow direction of the waste gas. The main purification unit, the high-temperature heating unit and the post-treatment filter screen are sequentially arranged in the treatment box along the flow direction of the waste gas, forming a three-stage treatment system of 'gradient purification + deep decomposition + terminal filtration', realizing efficient and comprehensive purification of VOCs waste gas, improving the overall treatment efficiency, and through the arrangement of the main purification unit, which comprises sequentially connected dry purification modules and wet purification modules, the VOCs waste gas can be deeply purified, the particulate matters and part of the VOCs are removed through the dry purification modules, and then the water-soluble components are treated by the wet purification modules, realizing step-by-step targeted treatment of different types of pollutants in the waste gas and improving the overall purification effect.

Description

Technical Field

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

[0002] Industrial production, chemical manufacturing, coating and printing industries generate large amounts of waste gas containing volatile organic compounds (VOCs). These VOCs not only have a pungent odor, but some components are also toxic and carcinogenic. If directly emitted into the atmosphere, they will cause serious pollution to the environment, exacerbating environmental problems such as ozone pollution and photochemical smog. At the same time, they will also harm human health, adversely affecting the respiratory and nervous systems.

[0003] Currently, existing VOCs waste gas treatment technologies and devices have many shortcomings: Limited purification efficiency: Traditional treatment devices mostly use a single purification method, which makes it difficult to comprehensively purify VOCs waste gas of different properties and concentrations. Especially for waste gas with complex components, there is often a problem of incomplete purification, and the emitted waste gas may still exceed the standard.

[0004] Easy to clog and difficult to maintain: When treating VOCs waste gas containing a large amount of particulate matter, the filter components are easily clogged by the particles, resulting in increased operating resistance and decreased purification efficiency. Furthermore, the filter components of existing devices are inconvenient to clean, often requiring shutdown and disassembly for cleaning, which affects the continuity of the treatment process and increases maintenance and time costs.

[0005] Low adsorbent utilization: When using adsorbents such as activated carbon to treat VOCs, the adsorbent is unevenly distributed in traditional devices, which can easily lead to local adsorption saturation while other areas of adsorbent are not fully utilized. This results in frequent adsorbent replacements and increases operating costs.

[0006] Poor sealing: If the connection points between the various components of the treatment device are not properly sealed, it will lead to exhaust gas leakage, which will not only reduce the purification efficiency, but also cause secondary pollution and affect the surrounding environment.

[0007] Poor process integration: The connection between dry purification, wet purification, and high-temperature treatment in some units is not reasonable enough, and the flow of waste gas between each stage is not smooth enough, which reduces the overall treatment efficiency and may cause local waste gas retention, affecting the treatment effect.

[0008] Therefore, this application provides a VOCs waste gas treatment device and treatment method to meet the needs of efficient, stable and low-cost treatment of VOCs waste gas in actual industrial production. Summary of the Invention

[0009] The technical problem to be solved by the present invention is to provide a VOCs waste gas treatment device and treatment method to solve the problems of low purification efficiency, easy clogging, difficult maintenance, low adsorbent utilization, poor sealing and poor process connection of existing VOCs waste gas treatment devices.

[0010] To solve the above-mentioned technical problems, the present invention provides the following technical solution: A VOCs waste gas treatment device includes a treatment box with openings at both ends for waste gas to enter and exit. Inside the treatment box, along the waste gas flow direction, are sequentially arranged a main purification unit, a high-temperature heating unit, and a post-treatment filter. The post-treatment filter and the high-temperature heating unit are both fixedly connected to the inner wall of the treatment box via a mounting bracket. The main purification unit, used for deep purification of VOCs waste gas, includes a dry purification module and a wet purification module connected in sequence. The dry purification module includes a multi-stage particulate matter purification component and a carbon adsorption purification component connected in series.

[0011] The particulate matter multi-stage purification component includes a housing, a drive component, a filter component, and an anti-clogging cleaning component. The filter component includes a pair of circular mounting plates disposed within the housing, one of which is connected to the drive component at its outer end. Multiple filter elements are arranged in a circumferential array between the pair of circular mounting plates, forming an annular mounting cavity. The anti-clogging cleaning component includes a cleaning shaft rotatably connected within the housing. A first drive motor is located on one side of the cleaning shaft, and its output end is fixedly connected to the cleaning shaft via a coupling. Multiple first elastic cleaning scrapers are fixedly connected to the cleaning shaft in a circumferential array, and these scrapers contact the outer surface of the filter elements to achieve dynamic cleaning. The carbon adsorption purification component includes a matching activated carbon carrier cylinder and a stir-frying component. The wet purification module includes a connected water-soluble purification component and a waste gas emission component.

[0012] Optionally, the filter kit includes a first filter element, a second filter element, and a third filter element connected in sequence; the first filter element includes a first inclined plate located between a pair of circular mounting plates, the first inclined plate being in contact with a first elastic cleaning scraper, the first inclined plate being in contact with the inner wall of the circular mounting plates, a second inclined plate being fixedly connected to one end of the first inclined plate, the second inclined plate being fixedly connected to the side wall of the adjacent first inclined plate, and a set of first filter holes being provided on the outer wall of the end of the first inclined plate near the second inclined plate and on both the second inclined plate; the second filter element includes a third inclined plate fixedly connected between the adjacent first inclined plates, and a set of second filter holes being provided on the side wall of the first inclined plate, both ends of the third inclined plate being located between the set of first filter holes and the set of second filter holes, and a set of third filter holes being provided on the third inclined plate, the second filter holes and the third filter holes having the same aperture.

[0013] The third filter element includes a fourth inclined plate fixedly connected between adjacent first inclined plates, and a set of fourth filter holes opened on the side wall of the first inclined plate. Both ends of the fourth inclined plate are located between a set of second filter holes and a set of fourth filter holes. An end fixing plate is fixedly connected to the other end of the adjacent first inclined plate. The end fixing plate is fixedly connected to the inner wall of the circular mounting plate. A set of fifth filter holes is opened on the end fixing plate. The diameter of the fifth filter holes and the fourth filter holes are equal. A second elastic cleaning scraper is fixedly connected to the side wall of the end fixing plate near the carbon adsorption purification component.

[0014] Optionally, the apertures of the first, second, and fourth filter holes decrease sequentially to achieve gradient filtration; the first, second, third, and fourth inclined plates are all made of elastic material and fit tightly against the inner wall of the circular mounting plate; the second elastic cleaning scraper is made of silicone; the first, third, and fourth inclined plates are all arc-shaped, and the second inclined plate and the end fixing plate are both U-shaped.

[0015] Optionally, the activated carbon carrier cylinder includes a porous adsorption outer cylinder disposed within the installation cavity. The outer wall of the porous adsorption outer cylinder is in contact with the second elastic cleaning scraper. One end of the porous adsorption outer cylinder passes through a first mounting hole opened in a circular mounting plate and a second mounting hole opened in the inner wall of the dry purification shell in the housing, and is fixedly connected to an end ring plate. The end ring plate is fixedly connected to the outer wall of the dry purification shell. The pore diameter of the filter holes on the porous adsorption outer cylinder is smaller than the pore diameter of the fourth filter hole. The stir-frying component includes a central shaft disposed within the porous adsorption outer cylinder. One end of the central shaft passes through the porous adsorption outer cylinder and is fixedly connected to the inner wall of the circular mounting plate. Multiple S-shaped carbon-collecting plates are fixedly connected to the central shaft in a circumferential array. The S-shaped carbon-collecting plates are in contact with the inner wall of the porous adsorption outer cylinder. Multiple air vents are opened on the S-shaped carbon-collecting plates. The S-shaped carbon-collecting plates are made of rigid plastic material.

[0016] Optionally, the water-soluble purification assembly includes a first wet purification box disposed on one side of the dry purification shell, a second wet purification box fixedly connected to the side of the first wet purification box near the dry purification shell, the second wet purification box being rotatably connected to the end ring plate via a hinge, a support plate fixedly connected to the outer end of the second wet purification box, a fixing bolt provided on the outer side of the support plate, one end of the fixing bolt penetrating the support plate and screwed into a threaded hole on the dry purification shell, a sealing element provided between the second wet purification box and the end ring plate; a U-shaped air distribution pipe fixedly connected to the inner wall of the first wet purification box, the U-shaped air distribution pipe not contacting the bottom end of the first wet purification box, a pair of vent holes provided on the side wall of the second wet purification box, an L-shaped air guide pipe fixedly connected to the vent holes, the L-shaped air guide pipe being fixedly connected to and communicating with the U-shaped air distribution pipe, and a drain device provided on the first wet purification box.

[0017] The first wet scrubbing chamber has a water injection hole on its outer wall, and a rubber sealing plug is inserted into the water injection hole. The sealing element includes a first annular groove on the outer wall of the second wet scrubbing chamber and a second annular groove on the outer wall of the end ring plate. A limiting cavity is formed between the first annular groove and the second annular groove. A rubber sealing ring that fits into the inner wall of the limiting cavity is provided in the limiting cavity. The rubber sealing ring is fixedly connected to the inner wall of the first annular groove. A metal elastic ring is provided inside the rubber sealing ring. The draining element includes a drain hole on the first wet scrubbing chamber. A first corrugated pipe is fixedly connected to the drain hole. One end of the first corrugated pipe passes through the bottom end of the treatment chamber and is fixedly connected to a first drain pipe. One end of the first drain pipe passes through the side wall of the bottom end of the treatment chamber and is fixedly connected to a valve. The outlet port of the valve is fixedly connected to a second drain pipe.

[0018] Optionally, the metal elastic ring includes a limiting and fixing ring fixed to the inner wall of the rubber sealing ring, and a plurality of U-shaped clamping plates arranged in a circumferential array are fixedly connected to the limiting and fixing ring; the U-shaped clamping plates include a pair of force-bending plates fixedly connected to the limiting and fixing ring, one end of the force-bending plate is fixedly connected to the limiting clamping plate, and a U-shaped support plate is fixedly connected between the pair of limiting clamping plates; the limiting clamping plates are located between the first annular groove and the second annular groove, and the U-shaped support plate is located in the second annular groove.

[0019] Optionally, the exhaust gas emission assembly includes an exhaust port opened on the first wet purification box, a second corrugated pipe fixedly connected inside the exhaust port, a Z-shaped pipe and an exhaust hood fixedly connected to the other end of the second corrugated pipe in sequence, and a fixing clamp fixedly connected to the outer wall of the dry purification shell. The exhaust hood includes a connected horn pipe and a dustproof protective cover plate, with the horn pipe fixedly connected to the Z-shaped pipe.

[0020] This application also provides a method for treating VOCs waste gas using a treatment device, including the following steps: Compared with the prior art, the present invention has at least the following beneficial effects: In the above scheme, by setting up a main purification unit, a high-temperature heating unit, and a post-treatment filter, which are distributed sequentially along the direction of exhaust gas flow in the treatment box, a three-level treatment system of "gradient purification + deep decomposition + terminal filtration" is formed to achieve efficient and comprehensive purification of VOCs exhaust gas and improve the overall treatment efficiency. By setting up a main purification unit, which includes a dry purification module and a wet purification module connected in sequence, VOCs exhaust gas can be deeply purified. The dry purification module first removes particulate matter and some VOCs, and then the wet purification module treats water-soluble components. This achieves step-by-step targeted treatment of different types of pollutants in the exhaust gas and improves the overall purification effect. Attached Figure Description

[0021] The accompanying drawings, which are incorporated herein and form part of the specification, illustrate embodiments of the invention and, together with the specification, further serve to explain the principles of the invention and enable those skilled in the art to practice and use the invention.

[0022] Figure 1 A first-person perspective three-dimensional structural diagram of a VOCs waste gas treatment device; Figure 2 A second-view three-dimensional structural diagram of a VOCs waste gas treatment device; Figure 3 A three-dimensional structural diagram of the VOCs waste gas treatment device's treatment method. Figure 4 for Figure 3 Schematic diagram of partial cross-section structure; Figure 5 for Figure 4 Enlarged structural diagram at point A in the middle; Figure 6 A three-dimensional enlarged structural diagram of the combination of the vertical dry purification module and the wet purification module; Figure 7 for Figure 6 Partial schematic diagram of the three-dimensional structure; Figure 8 A three-dimensional enlarged structural diagram showing the combination of the filter component, the material frying component, and the activated carbon carrier cylinder. Figure 9 for Figure 8 Partial cross-sectional magnified three-dimensional structural diagram; Figure 10 for Figure 7 Partial cross-sectional magnified three-dimensional structural diagram; Figure 11 for Figure 3 A magnified three-dimensional structural diagram showing the middle section; Figure 12 for Figure 11 Second-view partial cross-sectional magnified stereoscopic structural diagram; Figure 13 A three-dimensional enlarged structural diagram of the main purification unit; Figure 14 This is a magnified 3D structural diagram of the wet scrubbing module. Figure 15 for Figure 14 Cross-sectional magnified three-dimensional structural diagram; Figure 16 A partially enlarged three-dimensional cross-sectional view of the mating rubber sealing ring and metal elastic ring; Figure 17 for Figure 16 Enlarged structural diagram at point B.

[0023] Figure label: 1-Processing box; 2-Opening; 4-Post-processing filter; 5-High-temperature heating unit; 6-Main purification unit; 7-Dry purification module; 71-Dry purification shell; 72-Drive shell; 73-Drive component; 730-Second drive motor; 732-Drive pulley; 733-Driven pulley; 74-Filter component; 741-Circular mounting plate; 742-Filter kit; 743-First inclined plate; 744-Second inclined plate; 745-Third inclined plate; 746-Fourth inclined plate; 747-End fixing plate; 748-Second elastic cleaning scraper; 75-Stirring component; 751-Central shaft; 752-S-shaped carbon scraping plate; 753-Ventilation hole; 76-Activated carbon carrier cylinder; 761-Porous adsorption outer cylinder; 762-End ring plate; 77-Anti-clogging cleaning component ; 771-Cleaning shaft; 772-First elastic cleaning scraper; 773-First drive motor; 8-Wet purification module; 81-First wet purification box; 82-Second wet purification box; 83-U-shaped air distribution pipe; 84-L-shaped air guide pipe; 85-Drainage component; 851-First corrugated pipe; 852-First drain pipe; 853-Valve; 86-Exhaust gas emission component; 861-Second corrugated pipe; 862-Z-shaped pipe; 863-Exhaust hood; 864-Fixing clamp; 87-Sealing component; 871-First annular groove; 872-Second annular groove; 873-Rubber sealing ring; 874-Metal elastic ring; 8741-Limiting fixing ring; 8742-Force-bending plate; 8743-Limiting clamping plate; -U-shaped support plate; 9-Liquid discharge unit.

[0024] As shown in the figure, specific structures and devices are marked in the figure to clearly illustrate the structure of the embodiments of the present invention. However, this is only for illustrative purposes and is not intended to limit the present invention to this specific structure, device and environment. Those skilled in the art can adjust or modify these devices and environments according to specific needs. Detailed Implementation

[0025] The present invention provides a VOCs waste gas treatment device and treatment method with reference to the accompanying drawings and specific embodiments. It should be noted that, to make the embodiments more detailed, the following embodiments are the best and preferred embodiments, and those skilled in the art can use other alternative methods to implement some known technologies; moreover, the accompanying drawings are only for more specific description of the embodiments and are not intended to specifically limit the present invention.

[0026] It should be noted that the use of terms such as "an embodiment," "an embodiment," "an exemplary embodiment," and "some embodiments" in the specification indicates that the described embodiment may include a specific feature, structure, or characteristic, but not every embodiment necessarily includes that specific feature, structure, or characteristic. Furthermore, when a specific feature, structure, or characteristic is described in connection with an embodiment, implementing such a feature, structure, or characteristic in conjunction with other embodiments (whether explicitly described or not) should be within the knowledge of those skilled in the art.

[0027] Generally, terms can be understood at least partly from their use in context. For example, depending at least partly on the context, the term "one or more" as used herein can be used to describe any feature, structure, or characteristic in a singular sense, or a combination of features, structures, or characteristics in a plural sense. Additionally, the term "based on" can be understood not necessarily to convey an exclusive set of factors, but rather, alternatively, depending at least partly on the context, to allow for the presence of other factors that are not necessarily explicitly described.

[0028] It is understood that the meanings of “on”, “above”, and “above” in this invention should be interpreted in the broadest manner, such that “on” means not only “directly on” something, but also includes the meaning of being “on” something with an intervening feature or layer, and that “above” or “above” means not only “on” something, but also includes the meaning of being “on” something without an intervening feature or layer.

[0029] Furthermore, spatially related terms such as “below,” “under,” “lower,” “above,” and “upper” are used herein for convenience to describe the relationship of one element or feature to one or more other elements or features, as illustrated in the accompanying drawings. Spatially related terms are intended to cover different orientations in the use or operation of the device other than those depicted in the accompanying drawings. The device may be oriented in other ways, and the spatially related descriptive terms used herein can be interpreted similarly.

[0030] like Figures 1 to 17 As shown, an embodiment of the present invention provides a VOCs waste gas treatment device, including a treatment box 1, both ends of which are provided with openings 2 for waste gas to enter and exit; the treatment box 1 is provided with a main purification unit 6, a high-temperature heating unit 5 and a post-treatment filter 4 in sequence along the waste gas flow direction, and the post-treatment filter 4 and the high-temperature heating unit 5 are both fixedly connected to the inner wall of the treatment box 1 by a fixing bracket; the main purification unit 6 is used for deep purification of VOCs waste gas, including a dry purification module 7 and a wet purification module 8 connected in sequence.

[0031] Overall structural synergy effect: The treatment chamber 1 serves as the core carrier, forming a three-stage treatment system of "gradient purification + deep decomposition + terminal filtration" through the main purification unit 6, high-temperature heating unit 5, and post-treatment filter 4 arranged sequentially inside. After the exhaust gas enters from the inlet opening 2, it passes through the dry purification module 7 to remove particulate matter and some VOCs, and then the wet purification module 8 treats the water-soluble components. Subsequently, the high-temperature heating unit 5 pyrolyzes the residual organic matter, and finally, the exhaust gas is discharged from the outlet after the post-treatment filter 4 intercepts impurities. This series structure ensures improved exhaust gas treatment efficiency, and each unit works together through fixing frames or sealing components to avoid exhaust gas leakage. The overall sealing performance of the treatment chamber is improved compared to traditional devices.

[0032] like Figure 4 , Figures 8 to 11 As shown, the dry purification module 7 includes a particulate matter multi-stage purification component and a carbon adsorption purification component connected in series; the particulate matter multi-stage purification component includes a housing, a drive component 73, a filter component 74, and an anti-clogging and cleaning component 77.

[0033] The filter component 74 includes a pair of circular mounting plates 741 disposed within the housing. The outer end of one of the circular mounting plates 741 is connected to the drive component 73 for transmission. A plurality of filter kits 742 arranged in a circumferential array are disposed between the pair of circular mounting plates 741, and the plurality of filter kits 742 surround to form an annular mounting cavity. The anti-clogging cleaning component 77 includes a cleaning shaft 771 rotatably connected within the housing. A first drive motor 773 is disposed on one side of the cleaning shaft 771. The output end of the first drive motor 773 is fixedly connected to the cleaning shaft 771 via a coupling. A plurality of first elastic cleaning scrapers 772 arranged in a circumferential array are fixedly connected to the cleaning shaft 771. The first elastic cleaning scrapers 772 contact the outer surface of the filter kits 742 to achieve dynamic cleaning. The carbon adsorption purification component includes a matching activated carbon carrier cylinder 76 and a stir-frying component 75.

[0034] In actual operation, the drive component 73 drives the circular mounting plate 741 to rotate stably, thereby causing multiple filter kits 742 to rotate synchronously. During the rotation of the filter kits 742, the first elastic cleaning scraper 772 continuously contacts the outer surface of the filter kits 742, using its elastic properties to scrape off the particles attached to the surface of the filter kits 742. At the same time, it squeezes the filter kits 742 and causes them to vibrate, effectively avoiding the problem of reduced purification efficiency caused by clogging of the filter kits 742. Meanwhile, this dynamic cleaning method does not affect the normal filtration operation of the filter kits 742, realizing the synchronous operation of cleaning and filtration.

[0035] The filter kit 742 includes a first filter element, a second filter element, and a third filter element connected in sequence. The first filter element includes a first inclined plate 743 located between a pair of circular mounting plates 741. The first inclined plate 743 is in contact with a first elastic cleaning scraper 772 and is in contact with the inner wall of the circular mounting plate 741. A second inclined plate 744 is fixedly connected to one end of the first inclined plate 743. The second inclined plate 744 is fixedly connected to the side wall of the adjacent first inclined plate 743. A set of first filter holes is provided on the outer wall of the first inclined plate 743 near the second inclined plate 744 and on the second inclined plate 744. The second filter element includes a third inclined plate 745 fixedly connected between the adjacent first inclined plates 743 and a set of second filter holes provided on the side wall of the first inclined plate 743. Both ends of the third inclined plate 745 are located between a set of first filter holes and a set of second filter holes. A set of third filter holes is provided on the third inclined plate 745. The diameters of the second filter holes and the third filter holes are equal.

[0036] When VOCs exhaust gas enters the filter kit 742, it first comes into contact with the first filter element. The first filter holes on the first inclined plate 743 and the second inclined plate 744 perform preliminary filtration of larger particles in the exhaust gas. Due to the specific tilt angle design of the first inclined plate 743 and the second inclined plate 744, the exhaust gas generates a certain amount of turbulence when passing through, making it easier for larger particles to be intercepted on the surface of the filter holes. Subsequently, the exhaust gas that has undergone preliminary filtration enters the second filter element. The third filter hole on the third inclined plate 745 cooperates with the second filter hole on the first inclined plate 743 to filter medium-sized particles. The position setting of the third inclined plate 745 ensures that the exhaust gas must pass through this filtration stage, improving the reliability of filtration.

[0037] The third filter element includes a fourth inclined plate 746 fixedly connected between adjacent first inclined plates 743, and a set of fourth filter holes opened on the side wall of the first inclined plate 743. Both ends of the fourth inclined plate 746 are located between a set of second filter holes and a set of fourth filter holes. The other end of the adjacent first inclined plate 743 is fixedly connected to an end fixing plate 747. The end fixing plate 747 is fixedly connected to the inner wall of the circular mounting plate 741. A set of fifth filter holes is opened on the end fixing plate 747. The diameter of the fifth filter holes is equal to that of the fourth filter holes. A second elastic cleaning scraper 748 is fixedly connected to the side wall of the end fixing plate 747 near the carbon adsorption purification component.

[0038] The apertures of the first filter hole, the second filter hole, and the fourth filter hole decrease sequentially to achieve gradient filtration; the first inclined plate 743, the second inclined plate 744, the third inclined plate 745, and the fourth inclined plate 746 are all made of elastic material and fit tightly against the inner wall of the circular mounting plate 741; the second elastic cleaning scraper 748 is made of silicone; the first inclined plate 743, the third inclined plate 745, and the fourth inclined plate 746 are all arc-shaped, and the second inclined plate 744 and the end fixing plate 747 are both U-shaped.

[0039] The fourth and fifth filter holes in the third filter element have the smallest apertures and are used for deep filtration of fine particulate matter in the exhaust gas. This achieves gradient filtration of particles of different sizes from large to small, greatly improving the particle removal efficiency. The flexible inclined plate can deform to a certain extent during the rotation and cleaning of the filter kit 742, which ensures a tight fit with the inner wall of the circular mounting plate 741 to prevent exhaust gas leakage, and also reduces rigid friction between the cleaning scraper and the inclined plate, extending the service life of the components. The U-shaped second inclined plate 744 and the end fixing plate 747 further optimize the flow path of the exhaust gas, allowing the exhaust gas to come into more full contact with the filter holes and improve the filtration effect.

[0040] The activated carbon carrier cylinder 76 includes a porous adsorption outer cylinder 761 disposed within the installation cavity. The outer wall of the porous adsorption outer cylinder 761 is in contact with the second elastic cleaning scraper 748. One end of the porous adsorption outer cylinder 761 passes through a first mounting hole in a circular mounting plate 741 and a second mounting hole in the inner wall of the dry purification shell 71 in the housing, and is fixedly connected to an end ring plate 762. An annular groove is formed on the circular mounting plate 741 with the first mounting hole, and an annular baffle plate is threaded into the annular groove. To facilitate the cleaning of impurities in the filter kit 742, the end ring plate 762 is fixedly connected to the dry... The outer wall of the purification shell 71 has a filter hole diameter smaller than that of the fourth filter hole on the porous adsorption outer cylinder 761. The stir-frying component 75 includes a central shaft 751 disposed inside the porous adsorption outer cylinder 761. One end of the central shaft 751 passes through the porous adsorption outer cylinder 761 and is fixedly connected to the inner wall of the circular mounting plate 741. Multiple S-shaped carbon-collecting plates 752 arranged in a circumferential array are fixedly connected to the central shaft 751. The S-shaped carbon-collecting plates 752 are in contact with the inner wall of the porous adsorption outer cylinder 761. Multiple air vents 753 are opened on the S-shaped carbon-collecting plates 752. The S-shaped carbon-collecting plates 752 are made of rigid plastic material.

[0041] After being filtered by the particulate matter multi-stage purification components, the exhaust gas enters the activated carbon carrier cylinder 76. Since the pore size on the porous adsorption outer cylinder 761 is smaller than that of the fourth filter hole, it can further prevent fine particulate matter from entering the interior of the activated carbon. At the same time, when the circular mounting plate 741 rotates, it drives the central shaft 751 to rotate synchronously, causing the S-shaped carbon-lifting plate 752 to rotate inside the porous adsorption outer cylinder 761. The S-shaped structure design allows the carbon-lifting plate to more effectively turn the activated carbon, so that the activated carbon is evenly distributed inside the porous adsorption outer cylinder 761, avoiding the situation where the activated carbon in some areas is saturated while the activated carbon in other areas is not fully utilized. The setting of the vent holes 753 ensures that the exhaust gas can pass smoothly through the activated carbon layer and make full contact with the activated carbon, thereby improving the adsorption efficiency of VOCs. The second elastic cleaning scraper 748 cleans the outer wall of the porous adsorption outer cylinder 761 as the circular mounting plate 741 rotates, preventing particulate matter from clogging the filter holes.

[0042] The housing includes a connected dry purification housing 71 and a drive housing 72. The dry purification housing 71 is fixedly connected to the bottom of the processing box 1 via a base. The side wall of the dry purification housing 71 located on the end ring plate 762 is detachable to facilitate cleaning of the inside of the filter component 74. An air intake hole is provided at the rear end of the dry purification housing 71, and the air intake hole is connected to a dust collection mechanism. This is prior art and is not shown in the figure. The filter component 74 is disposed inside the dry purification housing 71. One end of the dry purification housing 71 is fixedly connected to the drive housing 72. A cleaning shaft 771 is rotatably connected to the dry purification housing 71. One end of the cleaning shaft 771 passes through the dry purification housing 71 and is connected to the first drive motor 773 inside the drive housing 72.

[0043] The drive component 73 includes a second drive motor 730 mounted on the base. The output shaft of the second drive motor 730 is fixedly connected to a drive pulley 732 located inside the drive housing 72 via a coupling. A driven pulley 733 is tensioned to one side of the drive pulley 732 via a belt. The driven pulley 733 is rotatably connected to the inner wall of the drive housing 72 via a rotating rod. One end of the rotating rod passes through one side wall of the dry purification housing 71 and is fixedly connected to the outer wall of one of the circular mounting plates 741.

[0044] The drive housing 72 provides good protection and installation space for the drive component 73, preventing the drive component 73 from being corroded and polluted by exhaust gas. The second drive motor 730 drives the rotating rod to rotate through the transmission of the drive pulley 732, belt and driven pulley 733, which in turn causes the circular mounting plate 741 to rotate. This belt drive method has the advantages of smooth transmission, low noise and shock absorption, and is suitable for use in exhaust gas treatment devices. The belt tension connection ensures the reliability of the transmission and avoids slippage that may affect the normal operation of the components.

[0045] The structure and synergistic effect of dry purification modules: The dry purification module 7 is composed of a multi-stage particulate matter purification component and a carbon adsorption purification component connected in series, realizing a progressive treatment of "removing particles first and then adsorbing VOCs".

[0046] 1. Particulate matter multi-stage purification component.

[0047] ①. Dynamic coordination between filter component 74 and anti-clogging cleaning component 77.

[0048] The filter kit 742 is connected to the drive component 73 via a circular mounting plate 741. When it rotates, it forms a relative motion with the first elastic cleaning scraper 772 of the anti-clogging cleaning component 77. The first elastic cleaning scraper 772 not only scrapes off the particles attached to the surface of the filter kit, but its elastic compression also causes the elastic inclined plate of the filter kit 742 to vibrate, shaking off the fine particles embedded in the filter holes, thus improving the anti-clogging efficiency. At the same time, the rotation and cleaning of the filter kit are carried out simultaneously without interrupting the purification process, solving the efficiency loss problem caused by the "shutdown cleaning" of traditional devices.

[0049] ②. The layered purification effect of the gradient filtration structure.

[0050] The first to third filter elements of filter kit 742 achieve gradient filtration through filter holes with decreasing pore size: first filter hole > second filter hole > fourth filter hole. The first inclined plate 743 and the second inclined plate 744 of the first filter element guide the exhaust gas to form turbulence through the U-shaped structure, which, together with the first filter hole, intercepts large particles.

[0051] The third inclined plate 745 of the second filter element cooperates with the second filter hole and the third filter hole to target various particulate matter.

[0052] The fourth inclined plate 746 and the end fixing plate 747 of the third filter element capture fine particles through the fourth and fifth filter holes.

[0053] In addition, the inclined plates made of elastic material, such as the first inclined plate 743, are tightly fitted with the circular mounting plate 741 to prevent short-circuit leakage of exhaust gas and reduce rigid wear of the cleaning scraper.

[0054] 2. The high-efficiency adsorption mechanism of carbon adsorption purification components.

[0055] ①. The linkage between the activated carbon carrier cylinder 76 and the stir-frying component 75.

[0056] The pore size of the porous adsorption outer cylinder 761 is smaller than that of the fourth filter pore, further blocking fine particles from entering the activated carbon layer and preventing adsorbent blockage. When the S-shaped carbon-lifting plate 752 of the material-roasting component rotates with the circular mounting plate 741, it flips the activated carbon through the S-shaped structure, making the activated carbon evenly distributed and avoiding local saturation. The vent holes 753 ensure that the exhaust gas penetrates the activated carbon layer, increasing the contact area and improving the VOCs adsorption efficiency.

[0057] ②. The auxiliary role of the second elastic cleaning scraper.

[0058] The second elastic cleaning scraper 748 made of silicone rotates with the end fixing plate 747, continuously cleaning the outer wall of the porous adsorption outer cylinder 761, preventing filter pore blockage and maintaining adsorption stability.

[0059] like Figure 4 , Figures 11 to 17 As shown, the wet purification module 8 includes a water-soluble purification component and an exhaust gas emission component 86 that are connected to each other. The water-soluble purification component includes a first wet purification box 81 disposed on one side of the dry purification shell 71. A second wet purification box 82 is fixedly connected to the side of the first wet purification box 81 near the dry purification shell 71. The second wet purification box 82 is rotatably connected to the end ring plate 762 via a hinge. A support plate is fixedly connected to the outer end of the second wet purification box 82. A fixing bolt is provided on the outer side of the support plate. One end of the fixing bolt passes through the support plate and is connected to... The dry purification shell 71 is screwed into a threaded hole, and a sealing element 87 is provided between the second wet purification box 82 and the end ring plate 762; a U-shaped air distribution pipe 83 is fixedly connected to the inner wall of the first wet purification box 81, and the U-shaped air distribution pipe 83 does not contact the bottom end of the first wet purification box 81; a pair of vent holes are opened on the side wall of the second wet purification box 82, and an L-shaped air guide pipe 84 is fixedly connected in the vent holes. The L-shaped air guide pipe 84 is fixed and connected to the U-shaped air distribution pipe 83; a drain component 85 is provided on the first wet purification box 81.

[0060] After dry purification, the exhaust gas enters the U-shaped air distribution pipe 83 through the L-shaped air guide pipe 84. The U-shaped air distribution pipe 83 can evenly distribute the exhaust gas into the absorbent liquid in the first wet purification box 81, increasing the contact area between the exhaust gas and the absorbent liquid, so that water-soluble components can be absorbed more fully. The second wet purification box 82 is connected to the end ring plate 762 by a hinge, which makes it easy to open for maintenance and repair of internal components. The fixing bolts ensure the sealing of the connection between the two during normal operation. The sealing element 87 further enhances the sealing performance of the connection and prevents exhaust gas leakage from causing environmental pollution.

[0061] A water inlet is provided on the outer wall of the first wet purification chamber 81, and a rubber sealing plug is inserted into the water inlet; the sealing element 87 includes a first annular groove 871 on the outer wall of the second wet purification chamber 82 and a second annular groove 872 on the outer wall of the end ring plate 762. A limiting cavity is formed between the first annular groove 871 and the second annular groove 872. A rubber sealing ring 873 is provided in the limiting cavity and fits against its inner wall. The rubber sealing ring 873 is fixedly connected to the inner wall of the first annular groove 871. A metal elastic ring 874 is provided inside the rubber sealing ring 873; the draining element 85 includes a drain hole on the first wet purification chamber 81. A first corrugated pipe 851 is fixedly connected in the drain hole. One end of the first corrugated pipe 851 penetrates the bottom end of the treatment chamber 1 and is fixedly connected to a first drain pipe 852. One end of the first drain pipe 852 penetrates the bottom side wall of the treatment chamber 1 and is fixedly connected to a valve 853. The outlet port of the valve 853 is fixedly connected to a second drain pipe.

[0062] Absorbent liquid can be added to the first wet scrubbing chamber 81 through the water injection hole. The rubber sealing plug can effectively prevent exhaust gas from leaking from the water injection hole. The rubber sealing ring 873 in the sealing component 87, supported by the metal elastic ring 874, can tightly fit the inner wall of the first annular groove 871 and the second annular groove 872, and can maintain good sealing performance even after long-term use. The elastic characteristics of the metal elastic ring 874 give the rubber sealing ring 873 a certain compensation ability, which can adapt to the small deformation of the connecting parts. When it is necessary to replace the absorbent liquid, the valve 853 is opened, and the absorbent liquid will be discharged through the first bellows 851, the first drain pipe 852 and the second drain pipe. The operation is simple and convenient. The setting of the first bellows 851 facilitates the installation and position adjustment of the first wet scrubbing chamber 81.

[0063] The metal elastic ring 874 includes a limiting and fixing ring 8741 fixed to the inner wall of the rubber sealing ring 873. Multiple U-shaped clamping plates arranged in a circumferential array are fixedly connected to the limiting and fixing ring 8741. The U-shaped clamping plates include a pair of force-bending plates 8742 fixedly connected to the limiting and fixing ring 8741. One end of the force-bending plate 8742 is fixedly connected to the limiting plate 8743. A U-shaped support plate 8744 is fixedly connected between the pair of limiting plates 8743. The limiting plate 8743 is located between the first annular groove 871 and the second annular groove 872, and the U-shaped support plate 8744 is located in the second annular groove 872.

[0064] When the U-shaped retaining plate in the metal elastic ring 874 is subjected to external force, the bending plate 8742 will bend and deform, generating elastic force, so that the rubber sealing ring 873 always maintains tight contact with the inner wall of the annular groove. The limiting retaining plate 8743 can limit the displacement of the rubber sealing ring 873 and prevent it from falling out of the limiting cavity. The U-shaped support plate 8744 enhances the support stability of the metal elastic ring 874 in the second annular groove 872, ensuring the overall sealing effect of the sealing element 87. The multiple U-shaped retaining plates are distributed in a circumferential array, making the force on each position of the rubber sealing ring 873 more uniform and the sealing performance more reliable.

[0065] The exhaust gas emission assembly 86 includes an exhaust port opened on the first wet purification chamber 81, a second corrugated pipe 861 fixedly connected inside the exhaust port, and a Z-shaped pipe 862 and an exhaust hood 863 fixedly connected to the other end of the second corrugated pipe 861 in sequence. A fixing clamp 864 fixedly connected to the outer wall of the dry purification shell 71 is snapped onto the Z-shaped pipe 862. The exhaust hood 863 includes a horn pipe and a dustproof protective cover plate connected together, and the horn pipe is fixedly connected to the Z-shaped pipe 862.

[0066] The exhaust gas, after wet purification, enters the exhaust hood 863 through the second corrugated pipe 861 and the Z-shaped pipe 862. The design of the horn-shaped pipe allows the exhaust gas to diffuse before being discharged, and to enter the processing area of ​​the high-temperature heating unit 5 evenly, thereby improving the pyrolysis efficiency. The dustproof protective cover can prevent external dust and other impurities from entering the exhaust channel, avoiding any impact on subsequent processing stages. The fixing clamp 864 plays a role in fixing the Z-shaped pipe 862, ensuring the stability of the pipe connection. The second corrugated pipe 861 has good flexibility, which facilitates the installation and position adjustment of the exhaust hood 863 and the Z-shaped pipe 862.

[0067] Structure and synergistic effect of wet purification module 8: The wet purification module 8, through the cooperation of the water-soluble purification component and the exhaust gas emission component 86, deeply treats water-soluble VOCs and guides the exhaust gas into the next stage.

[0068] 1. Mass transfer enhancement design of water-soluble purification components.

[0069] ①. Ensure full contact between the U-shaped air distribution tube and the absorbent liquid.

[0070] The L-shaped air guide pipe 84 introduces the dry-purified waste gas into the U-shaped air distribution pipe 83. The U-shaped structure allows the waste gas to be released at multiple points in the absorbent liquid, improving the uniformity of bubble distribution and extending the contact time with the absorbent liquid compared to traditional straight pipe air distribution, thus effectively improving the removal rate of water-soluble VOCs.

[0071] ②. Double protection of seal 87.

[0072] The metal elastic ring 874 inside the rubber sealing ring 873 generates elastic force through the force-bending plate 8742 of the U-shaped clamping plate, so that the sealing ring fits tightly into the first and second annular grooves 871 and 872. Even if there is slight deformation after long-term use, the sealing performance can still be maintained and the leakage rate can be controlled.

[0073] 2. The guiding and pretreatment effect of the exhaust gas emission components.

[0074] ①. Airflow optimization of Z-shaped pipe and exhaust hood.

[0075] The Z-shaped tube 862 reduces exhaust gas resistance, and in conjunction with the horn tube design of the exhaust hood 863, it expands the exhaust gas diffusion angle, allowing it to enter the heating area of ​​the high-temperature heating unit 5 evenly, thus improving the uniformity of pyrolysis.

[0076] The liquid discharge unit 9 includes a water box located below the high-temperature heating unit 5. A drain bend is fixedly connected to one side of the water box. The drain bend passes through the bottom and bottom side wall of the treatment tank 1. A drain valve is fixedly connected to the drain bend. This is prior art and is not shown in the figure.

[0077] This application also provides a method for treating VOCs waste gas using a treatment device, including the following steps: S1. Pretreatment stage: VOCs exhaust gas enters the dry purification stage after entering through the inlet opening 2 of the treatment box 1; firstly, it undergoes gradient filtration through the filter kit 742 of the particulate matter multi-stage purification component, while the drive component 73 drives the filter kit 742 to rotate, and the first elastic cleaning scraper 772 of the anti-clogging cleaning component 77 removes the particulate matter attached to the surface of the filter kit 742; then the exhaust gas enters the carbon adsorption purification component, enters its interior through the activated carbon carrier cylinder 76 and is adsorbed by the activated carbon inside, while the S-shaped carbon scraper 752 of the stir-frying component 75 rotates to make the activated carbon evenly distributed to improve the adsorption efficiency.

[0078] S2. Wet purification stage: The exhaust gas after dry purification enters the U-shaped air distribution pipe 83 of the first wet purification box 81 through the L-shaped air guide pipe 84, and achieves purification of water-soluble components after fully contacting the absorbent liquid in the box.

[0079] S3. The purified exhaust gas is discharged through the second corrugated pipe 861, the Z-shaped pipe 862 and the exhaust hood 863. The exhaust hood 863 will distribute the exhaust gas evenly and it will be pyrolyzed by the high-temperature heating unit 5.

[0080] S4. The exhaust gas after heating will be filtered again by the post-treatment filter 4.

[0081] S5. Discharge stage: After impurities are intercepted by the post-treatment filter 4, they are discharged through the outlet opening 2.

[0082] This invention encompasses any substitutions, modifications, equivalent methods, and solutions made within the spirit and scope of this invention. To provide the public with a thorough understanding of this invention, specific details are described in detail in the following preferred embodiments; however, those skilled in the art will fully understand the invention even without these details. Furthermore, to avoid unnecessary misunderstanding of the essence of this invention, well-known methods, processes, procedures, components, and circuits are not described in detail.

[0083] The above description is only a preferred embodiment of the present invention. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the principle of the present invention, and these improvements and modifications should also be considered within the scope of protection of the present invention.

Claims

1. A VOCs waste gas treatment device, characterized in that, The device includes a treatment box with openings at both ends for waste gas to enter and exit. Inside the treatment box, along the direction of waste gas flow, there are a main purification unit, a high-temperature heating unit, and a post-treatment filter. The post-treatment filter and the high-temperature heating unit are both fixedly connected to the inner wall of the treatment box by a fixing bracket. The main purification unit, used for deep purification of VOCs exhaust gas, includes a dry purification module and a wet purification module connected in sequence. The dry purification module includes a multi-stage particulate matter purification component and a carbon adsorption purification component connected in series. The particulate matter multi-stage purification component includes a housing, a drive component, a filter component, and an anti-clogging and cleaning component; The filter component includes a pair of circular mounting plates disposed within the housing, one of which is connected to the drive component at its outer end. A plurality of filter kits are arranged in a circumferential array between the pair of circular mounting plates, and the plurality of filter kits enclose an annular mounting cavity. The anti-clogging cleaning component includes a cleaning shaft rotatably connected inside the housing. A first drive motor is provided on one side of the cleaning shaft. The output end of the first drive motor is fixedly connected to the cleaning shaft through a coupling. Multiple first elastic cleaning scrapers are fixedly connected on the cleaning shaft in a circumferential array. The first elastic cleaning scrapers contact the outer surface of the filter kit to achieve dynamic cleaning. The carbon adsorption purification component includes a matching activated carbon carrier cylinder and a stir-frying component; The wet scrubbing module includes interconnected water-soluble purification components and exhaust gas emission components; The filter kit includes a first filter element, a second filter element, and a third filter element connected in sequence; The first filter element includes a first inclined plate located between a pair of circular mounting plates. The first inclined plate is in contact with a first elastic cleaning scraper and is attached to the inner wall of the circular mounting plate. A second inclined plate is fixedly connected to one end of the first inclined plate. The second inclined plate is fixedly connected to the side wall of the adjacent first inclined plate. A set of first filter holes is provided on the outer wall of the end of the first inclined plate near the second inclined plate and on the second inclined plate. The second filter element includes a third inclined plate fixedly connected between adjacent first inclined plates, and a set of second filter holes opened on the side wall of the first inclined plate. Both ends of the third inclined plate are located between a set of first filter holes and a set of second filter holes. A set of third filter holes is opened on the third inclined plate, and the diameters of the second filter holes and the third filter holes are equal. The third filter element includes a fourth inclined plate fixedly connected between adjacent first inclined plates, and a set of fourth filter holes opened on the side wall of the first inclined plate. Both ends of the fourth inclined plate are located between a set of second filter holes and a set of fourth filter holes. An end fixing plate is fixedly connected to the other end of the adjacent first inclined plate. The end fixing plate is fixedly connected to the inner wall of the circular mounting plate. A set of fifth filter holes is opened on the end fixing plate. The diameter of the fifth filter holes and the fourth filter holes are equal. A second elastic cleaning scraper is fixedly connected to the side wall of the end fixing plate near the carbon adsorption purification component. The activated carbon carrier cylinder includes a porous adsorption outer cylinder disposed in the installation cavity. The outer wall of the porous adsorption outer cylinder is in contact with the second elastic cleaning scraper. One end of the porous adsorption outer cylinder passes through the first installation hole opened in the circular installation plate and the second installation hole opened in the inner wall of the dry purification shell in the shell and is fixedly connected to an end ring plate. The end ring plate is fixedly connected to the outer wall of the dry purification shell. The pore diameter of the filter hole on the porous adsorption outer cylinder is smaller than the pore diameter of the fourth filter hole. The stir-frying component includes a central shaft disposed inside a porous adsorption outer cylinder. One end of the central shaft passes through the porous adsorption outer cylinder and is fixedly connected to the inner wall of a circular mounting plate. Multiple S-shaped carbon-collecting plates arranged in a circumferential array are fixedly connected to the central shaft. The S-shaped carbon-collecting plates are in contact with the inner wall of the porous adsorption outer cylinder. Multiple air vents are provided on the S-shaped carbon-collecting plates. The S-shaped carbon-collecting plates are made of rigid plastic material. The apertures of the first, second, and fourth filter holes decrease sequentially to achieve gradient filtration; the first, second, third, and fourth inclined plates are all made of elastic material and fit tightly against the inner wall of the circular mounting plate; the second elastic cleaning scraper is made of silicone; the first, third, and fourth inclined plates are all arc-shaped, while the second inclined plate and the end fixing plate are U-shaped.

2. The VOCs waste gas treatment device according to claim 1, characterized in that, The water-soluble purification component includes a first wet purification box disposed on one side of the dry purification shell, a second wet purification box fixedly connected to the side of the first wet purification box near the dry purification shell, the second wet purification box being rotatably connected to the end ring plate via a hinge, a support plate being fixedly connected to the outer end of the second wet purification box, a fixing bolt being provided on the outer side of the support plate, one end of the fixing bolt penetrating the support plate and being screwed into a threaded hole on the dry purification shell, and a sealing element being provided between the second wet purification box and the end ring plate. A U-shaped air distribution pipe is fixedly connected to the inner wall of the first wet purification box. The U-shaped air distribution pipe is not in contact with the bottom of the first wet purification box. A pair of air vents are opened on the side wall of the second wet purification box. An L-shaped air guide pipe is fixedly connected to the air vent. The L-shaped air guide pipe is fixed and connected to the U-shaped air distribution pipe. A drain device is provided on the first wet purification box. The outer wall of the first wet purification box is provided with a water injection hole, and a rubber sealing plug is inserted into the water injection hole. The sealing element includes a first annular groove on the outer wall of the second wet purification chamber and a second annular groove on the outer wall of the end ring plate. A limiting cavity is formed between the first annular groove and the second annular groove. A rubber sealing ring is provided in the limiting cavity and fits against its inner wall. The rubber sealing ring is fixedly connected to the inner wall of the first annular groove. A metal elastic ring is provided inside the rubber sealing ring. The drain component includes a drain hole opened on the first wet purification tank, a first corrugated pipe fixedly connected inside the drain hole, one end of the first corrugated pipe passing through the bottom of the treatment tank and fixedly connected to a first drain pipe, one end of the first drain pipe passing through the side wall of the bottom of the treatment tank and fixedly connected to a valve, and the outlet port of the valve fixedly connected to a second drain pipe.

3. The VOCs waste gas treatment device according to claim 2, characterized in that, The metal elastic ring includes a limiting and fixing ring fixed to the inner wall of the rubber sealing ring, and multiple U-shaped clamping plates arranged in a circumferential array are fixedly connected to the limiting and fixing ring. The U-shaped clamping plate includes a pair of force-bending plates fixedly connected to the limiting and fixing ring. One end of the force-bending plate is fixedly connected to the limiting clamping plate, and a U-shaped support plate is fixedly connected between the pair of limiting clamping plates. The limiting plate is located between the first annular groove and the second annular groove, and the U-shaped support plate is located in the second annular groove.

4. The VOCs waste gas treatment device according to claim 3, characterized in that, The exhaust gas emission assembly includes an exhaust port opened on the first wet purification box, a second corrugated pipe fixedly connected inside the exhaust port, and a Z-shaped pipe and an exhaust hood fixedly connected to the other end of the second corrugated pipe in sequence. A fixing clamp fixedly connected to the outer wall of the dry purification shell is snapped onto the Z-shaped pipe. The exhaust hood includes a connected horn pipe and a dustproof protective cover plate, with the horn pipe fixedly connected to the Z-shaped pipe.

5. The VOCs waste gas treatment method according to any one of claims 1-4, characterized in that, Includes the following steps: S1. Pretreatment stage: VOCs exhaust gas enters the dry purification stage after entering through the inlet opening of the treatment box; First, the filter kit of the particulate matter multi-stage purification component performs gradient filtration. At the same time, the drive component drives the filter kit to rotate, and the first elastic cleaning scraper of the anti-clogging cleaning component removes the particulate matter attached to the surface of the filter kit. The exhaust gas then enters the carbon adsorption purification component, passes through the activated carbon carrier cylinder and is adsorbed by the activated carbon inside. At the same time, the S-shaped carbon-lifting plate of the stir-frying component rotates to distribute the activated carbon evenly and improve the adsorption efficiency. S2. Wet purification stage: The exhaust gas after dry purification enters the U-shaped air distribution pipe of the first wet purification box through the L-shaped air guide pipe, and achieves purification of water-soluble components after fully contacting the absorbent liquid in the box. S3. The purified exhaust gas is discharged through the second corrugated pipe, Z-shaped pipe and exhaust hood. The exhaust hood will distribute the exhaust gas evenly and it will be pyrolyzed by the high-temperature heating unit. S4. The exhaust gas after heat treatment will be filtered again by the post-treatment filter; S5. Discharge stage: After impurities are intercepted by the post-treatment filter, the waste is discharged through the outlet opening.

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