Multi-component VOCs (volatile organic compounds) complex-phase advanced oxidation and efficient absorption purification device and purification method thereof

Abstract

The invention relates to a multicomponent VOCs multiphase advanced oxidation and efficient absorption purification device and a purification method thereof, and belongs to the technical field of waste gas treatment.The multicomponent VOCs multiphase advanced oxidation and efficient absorption purification device comprises a supporting base, an oxidation tower and an adsorption tower are fixedly connected to the top of the supporting base, and a gas-liquid mixing structure capable of improving the gas-liquid reaction efficiency is arranged in the oxidation tower; the gas-liquid mixing structure comprises a tower plate fixedly connected to the interior of the oxidation tower, and a gas rising pipe is fixedly connected to the upper surface of the tower plate. According to the multi-component VOCs complex-phase advanced oxidation and efficient absorption purification device and the purification method thereof, physical and chemical reactions in five forms of gas-liquid, liquid-liquid, gas-gas, aerial fog and gas-solid are continuously generated in the device through a bubble cap tower plate, a rotational flow plate and a top gas injection pipeline which are arranged in the oxidation tower as well as a non-metal filler plate and an atomization nozzle which are arranged in the adsorption tower; the multi-mechanism and complex-phase synergistic purification path ensures that VOCs and malodorous gases with different properties can be efficiently degraded and removed.

Description

Technical Field

[0001] This invention relates to the field of waste gas treatment technology, specifically to a multi-component VOCs complex-phase advanced oxidation and high-efficiency absorption purification device and its purification method. Background Technology

[0002] Currently, conventional technologies for treating high-concentration organic waste gas mainly include activated carbon adsorption, low-temperature plasma, photocatalytic oxidation, biodegradation, and adsorption-concentration-catalytic combustion. Activated carbon adsorption is extremely expensive to operate and maintain, and it easily causes secondary pollution. Low-temperature plasma technology, used in the catering industry for fume treatment, is unsuitable for organic waste gas treatment, and the byproducts and large amounts of ozone generated during the process can easily cause arcing and ignition of the organic waste gas. Photocatalytic oxidation technology, due to its short reaction time, produces more toxic intermediate products such as ketones and aldehydes, as well as large amounts of ozone, during the photocatalytic oxidation process. Biodegradation technology has poor applicability, only suitable for specific pollutants, and the bacteria are easily killed, limiting its effectiveness in treating easily soluble and easily degradable pollutants. The catalytic combustion process for organic waste gas produces large amounts of chlorine dioxide, which also pollutes the atmosphere.

[0003] AOAP technology essentially combines advanced oxidation and high-efficiency absorption to synergistically treat pollutants. However, existing mainstream technologies generally suffer from inherent drawbacks such as difficulty in balancing treatment efficiency and safety, high operating costs, susceptibility to secondary pollution, or limited applicability. This is particularly evident when treating multi-component VOCs waste gases with complex compositions, containing heteroatoms (such as S, N, and Cl), or low-boiling-point components, where the limitations of single technologies become particularly pronounced. Therefore, this paper proposes a multi-component VOCs multi-phase advanced oxidation and high-efficiency absorption purification device and its purification method to address the aforementioned problems. Summary of the Invention

[0004] To address the shortcomings of existing technologies, this invention provides a multi-component VOCs complex-phase advanced oxidation and high-efficiency absorption purification device and its purification method, which has the advantage of synergistic multiple purification mechanisms and solves the inherent defects of existing mainstream technologies, such as difficulty in balancing treatment efficiency and safety, high operating costs, easy generation of secondary pollution, or limited applicable scenarios.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a multi-component VOCs complex phase advanced oxidation and high-efficiency absorption purification device, including a support base, an oxidation tower and an adsorption tower are fixedly connected to the top of the support base respectively, and the oxidation tower is provided with a gas-liquid mixing structure that can improve the gas-liquid reaction efficiency.

[0006] The gas-liquid mixing structure includes a tower plate fixedly connected inside the oxidation tower. A gas riser pipe is fixedly connected to the upper surface of the tower plate. A bubble cover is sleeved on the outside of the gas riser pipe. The outer surface of the bubble cover has serrations that allow gas and liquid to pass through. A spray steel pipe is fixedly connected inside the oxidation tower.

[0007] Furthermore, a support plate is fixedly connected inside the riser pipe, and an installation bolt extending into the support plate is slidably connected to the top of the bubble cover. The installation bolt is connected to the support plate by a threaded connection, and an opening with the same inner diameter as the riser pipe is opened inside the tower plate.

[0008] Furthermore, there are three trays, which are equidistantly distributed inside the oxidation tower, and one end of the spray steel pipe is fixedly connected to an inlet pipe extending to the outside of the oxidation tower.

[0009] Furthermore, a swirl plate is fixedly connected inside the oxidation tower, and a jet pipe is fixedly connected to the top inside the oxidation tower.

[0010] Furthermore, an air inlet pipe and a liquid outlet pipe, which are connected to the interior of the oxidation tower, are fixedly connected to the outer surface of the oxidation tower, with the air inlet pipe located above the liquid outlet pipe.

[0011] Furthermore, one end of the jet pipe is fixedly connected to a gas supply pipe extending to the outside of the oxidation tower, and the top of the oxidation tower is fixedly connected to a connector, with a connecting pipe fixedly connected between the connector and the adsorption tower.

[0012] Furthermore, an annular pipe is fixedly connected inside the adsorption tower, and an atomizing nozzle is fixedly connected to the bottom of the annular pipe.

[0013] Furthermore, the adsorption tower is internally fixedly connected with three packing plates, all of which are made of non-metallic materials. The top of the adsorption tower is fixedly connected to an exhaust pipe that communicates with its interior.

[0014] Another technical problem to be solved by the present invention is to provide a purification method for a multi-component VOCs complex phase advanced oxidation and high-efficiency absorption purification device, comprising the following steps:

[0015] S1. Waste Gas Premixing and Primary Oxidation: The multi-component VOCs waste gas to be treated is introduced into the bottom of the oxidation tower through the inlet pipe; the waste gas flows from bottom to top in the oxidation tower and comes into countercurrent contact with the water-based absorbent liquid rich in hydroxyl radicals (·H2O) sprayed in through the spray pipe. The water-based absorbent liquid is mainly composed of anionic surfactant sodium citrate. During the upward process, the waste gas passes through the bubble caps on multiple tower plates in sequence, and is fully mixed with the absorbent liquid through the serrations on the outer surface of the bubble caps, completing the initial gas-liquid oxidation reaction; at the same time, some waste gas and absorbent liquid form a liquid layer on the tower plate to carry out a liquid-liquid oxidation reaction.

[0016] S2, Deep Multiphase Advanced Oxidation: After primary oxidation, the waste gas continues to rise and flows through the swirl plate in the middle of the oxidation tower. Under the guidance of the swirl plate, it swirls and stirs with the absorbent liquid, further enhancing gas-liquid mass transfer and oxidation reaction. At the same time, additional gaseous oxidant (such as ozone or air) is introduced into the tower through the jet pipe located at the top of the oxidation tower, so that the organic matter in the waste gas that has not been completely oxidized can undergo gas-to-gas oxidation reaction with the gaseous oxidant. After the spray liquid is atomized at the top, it forms a gas mist reaction with the waste gas, further dissolving and oxidizing the residual organic matter. In this process, hydroxyl radicals (·HO) act as the main oxidant, non-selectively oxidizing and decomposing organic matter into carbon dioxide, water and harmless substances.

[0017] S3. Gas-solid adsorption and packing regeneration: The gas treated by the oxidation tower enters the bottom of the adsorption tower through a connecting pipe. The gas passes through multiple layers of packing plates made of non-metallic materials inside the adsorption tower from bottom to top. The residual organic pollutants in the waste gas are adsorbed on the surface of the packing and removed by completing the gas-solid reaction. At the same time, an oxidant-rich absorbent liquid is sprayed onto the packing layer through the atomizing nozzle at the bottom of the annular pipe. The organic matter adsorbed on the surface of the packing is oxidized and decomposed by the gas and liquid oxidants, thereby realizing the in-situ regeneration of the packing and forming a virtuous cycle of "adsorption, oxidation, regeneration and re-adsorption".

[0018] S4. Final Purification and Emission: The clean gas after adsorption and deep purification is discharged from the exhaust pipe at the top of the adsorption tower in compliance with standards.

[0019] Furthermore, the oxidation reactions in S1 and S2 are carried out at normal temperature and pressure. The water-based absorbent in S1 is a high-boiling-point, low-vapor-pressure, non-toxic and harmless liquid. The gas-liquid oxidation, liquid-liquid oxidation, gas-gas oxidation, gas mist oxidation, as well as gas-solid adsorption and regeneration processes are completed synergistically and continuously in a single oxidation tower and adsorption tower, realizing multi-functionality of one tower.

[0020] Compared with the prior art, the present invention provides a multi-component VOCs complex phase advanced oxidation and high-efficiency absorption purification device and method, which has the following beneficial effects:

[0021] 1. This multi-component VOCs complex-phase advanced oxidation and high-efficiency absorption purification device and its purification method, through the bubble cap tray, swirl plate and top jet pipe set in the oxidation tower, and the non-metallic packing plate and atomizing nozzle in the adsorption tower, five forms of physicochemical reactions occur continuously inside the device: gas-liquid, liquid-liquid, gas-gas, gas mist and gas solid. This multi-mechanism, complex-phase synergistic purification path ensures that VOCs and odorous gases of different properties can be efficiently degraded and removed, solving the bottleneck problem of poor applicability of single technology.

[0022] 2. This multi-component VOCs complex phase advanced oxidation and high-efficiency absorption purification device and its purification method use hydroxyl radicals (·HO) as the core oxidant, and the final reaction products are CO2 and H2O. Moreover, the oxidation process is non-selective, fundamentally avoiding the problem of toxic intermediate products such as ketones and aldehydes generated by photocatalysis. It adopts a water-based high-boiling-point, low-vapor-pressure absorbent, making the system inherently safe and eliminating the common risk of combustion and explosion when treating combustible organic waste gas. The adsorption tower packing is regenerated in situ by spraying the oxidant-rich absorbent, forming a virtuous cycle of "adsorption, oxidation regeneration, and re-adsorption", avoiding the secondary pollution problems such as the need for frequent replacement of activated carbon after adsorption or hazardous waste treatment. Attached Figure Description

[0023] Figure 1 This is a three-dimensional structural view of the multi-component VOCs complex-phase advanced oxidation and high-efficiency absorption purification device of the present invention;

[0024] Figure 2 This is a cross-sectional perspective view of the oxidation tower of the multi-component VOCs multiphase advanced oxidation and high-efficiency absorption purification device of the present invention;

[0025] Figure 3 This is a perspective view of the gas-liquid mixing structure of the multi-component VOCs multiphase advanced oxidation and high-efficiency absorption purification device of the present invention;

[0026] Figure 4 This is a cross-sectional perspective view of the absorption tower of the multi-component VOCs complex phase advanced oxidation and high-efficiency absorption purification device of the present invention.

[0027] In the diagram: 1. Support base; 2. Oxidation tower; 3. Adsorption tower; 4. Tower plate; 5. Gas riser pipe; 6. Support plate; 7. Bubble cap; 8. Gap; 9. Mounting bolt; 10. Spray steel pipe; 11. Liquid inlet pipe; 12. Gas inlet pipe; 13. Swirl plate; 14. Jet pipe; 15. Gas delivery pipe; 16. Liquid discharge pipe; 17. Connector; 18. Connecting pipe; 19. Circular pipe; 20. Packing plate; 21. Flue gas exhaust pipe. Detailed Implementation

[0028] 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.

[0029] Please see Figures 1 to 3 The multi-component VOCs complex phase advanced oxidation and high-efficiency absorption purification device in this embodiment includes a support base 1. An oxidation tower 2 and an adsorption tower 3 are fixedly connected to the top of the support base 1. The oxidation tower 2 is equipped with a gas-liquid mixing structure that can improve the gas-liquid reaction efficiency. The gas-liquid mixing structure includes a tower plate 4 fixedly connected to the inside of the oxidation tower 2. A gas riser pipe 5 is fixedly connected to the upper surface of the tower plate 4. A bubble cover 7 is sleeved on the outside of the gas riser pipe 5. A toothed slit 8 is opened on the outer surface of the bubble cover 7 to allow gas and liquid to pass through. A spray steel pipe 10 is fixedly connected to the inside of the oxidation tower 2.

[0030] Specifically, a support plate 6 is fixedly connected inside the riser pipe 5, and a mounting bolt 9 extending into the support plate 6 is slidably connected to the top of the bubble cap 7. The mounting bolt 9 is connected to the support plate 6 by a threaded connection. The inside of the tower plate 4 has an opening with the same inner diameter as the riser pipe 5. There are three tower plates 4, which are equidistantly distributed inside the oxidation tower 2. One end of the spray steel pipe 10 is fixedly connected to an inlet pipe 11 extending to the outside of the oxidation tower 2.

[0031] It should be noted that each tray 4 constitutes an independent reaction unit, and the exhaust gas passes through it step by step, achieving the step-by-step deep oxidation of pollutants.

[0032] Please see Figure 1 and Figure 2 In this embodiment, a swirl plate 13 is fixedly connected inside the oxidation tower 2, and a jet pipe 14 is fixedly connected to the top inside the oxidation tower 2. An air inlet pipe 12 and a liquid outlet pipe 16, which are connected to the interior of the oxidation tower 2, are fixedly connected to the outer surface of the oxidation tower 2, with the air inlet pipe 12 located above the liquid outlet pipe 16.

[0033] Specifically, one end of the jet pipe 14 is fixedly connected to a gas supply pipe 15 extending to the outside of the oxidation tower 2, and the top of the oxidation tower 2 is fixedly connected to a connector 17. A connecting pipe 18 is fixedly connected between the connector 17 and the adsorption tower 3.

[0034] It should be noted that additional gaseous oxidants (such as ozone, supersaturated air, etc.) are introduced into the tower. The exhaust gas is fully mixed with the high concentration of oxidants in this area to complete the gas-gas oxidation reaction. At the same time, the atomized droplets undergo a gas-mist reaction with the exhaust gas.

[0035] Please see Figure 1 and Figure 4 In this embodiment, an annular pipe 19 is fixedly connected inside the adsorption tower 3, and an atomizing nozzle is fixedly connected to the bottom of the annular pipe 19. Three packing plates 20 are fixedly connected inside the adsorption tower 3, and all three packing plates 20 are made of non-metallic materials. A smoke exhaust pipe 21 that communicates with the interior of the adsorption tower 3 is fixedly connected to the top of the adsorption tower 3.

[0036] Specifically, the core function of adsorption tower 3 is to capture residual pollutants and realize the self-regeneration of the packing material, and to uniformly atomize the oxidant-rich absorbent liquid to cover the entire packing cross section.

[0037] It should be noted that residual VOCs in the gas are removed by adsorption (gas-solid reaction) on the surface of the packing material; at the same time, the absorbent sprayed from above continuously flushes the packing material, providing an oxidant to degrade the adsorbed pollutants and realizing in-situ chemical regeneration of the packing material, thus forming a dynamic and sustainable virtuous cycle without the need for frequent packing material replacement.

[0038] Another technical problem to be solved by the present invention is to provide a purification method for a multi-component VOCs complex phase advanced oxidation and high-efficiency absorption purification device, comprising the following steps:

[0039] S1. Waste gas premixing and primary oxidation: The multi-component VOCs waste gas to be treated is introduced into the bottom of the oxidation tower 2 through the inlet pipe 12; the waste gas flows from bottom to top in the oxidation tower 2 and comes into countercurrent contact with the water-based absorbent liquid rich in hydroxyl radicals (·HO) sprayed in through the spray steel pipe 10. The water-based absorbent liquid is mainly composed of anionic surfactant sodium citrate. During the upward process, the waste gas passes through the bubble caps 7 on multiple tower plates 4 in sequence, and is fully mixed with the absorbent liquid through the tooth gaps 8 on the outer surface of the bubble caps 7, completing the preliminary gas-liquid oxidation reaction; at the same time, some waste gas and absorbent liquid form a liquid layer on the tower plate 4, and carry out a liquid-liquid oxidation reaction;

[0040] S2, Deep Multiphase Advanced Oxidation: The exhaust gas after primary oxidation continues to rise and flows through the swirl plate 13 in the middle of oxidation tower 2. Under the guidance of the swirl plate 13, it generates swirling and stirring with the absorbent liquid, further enhancing gas-liquid mass transfer and oxidation reaction. At the same time, additional gaseous oxidant (such as ozone or air) is introduced into the tower through the jet pipe 14 located at the top of oxidation tower 2, so that the organic matter in the exhaust gas that has not been completely oxidized can undergo gas-to-gas oxidation reaction with the gaseous oxidant. After the spray liquid is atomized at the top, it forms a gas mist reaction with the exhaust gas, further dissolving and oxidizing the residual organic matter. In this process, hydroxyl radicals (·HO) act as the main oxidant, non-selectively oxidizing and decomposing organic matter into carbon dioxide, water and harmless substances.

[0041] S3. Gas-solid adsorption and packing regeneration: The gas treated by the oxidation tower 2 enters the bottom of the adsorption tower 3 through the connecting pipe 18. The gas passes through the multiple layers of packing plates 20 made of non-metallic materials inside the adsorption tower 3 from bottom to top. The residual organic pollutants in the waste gas are adsorbed on the surface of the packing and removed by completing the gas-solid reaction. At the same time, the absorbent liquid rich in oxidant is sprayed onto the packing layer through the atomizing nozzle at the bottom of the annular pipe 19. The organic matter adsorbed on the surface of the packing is oxidized and decomposed by the gas and liquid oxidants, thereby realizing the in-situ regeneration of the packing and forming a virtuous cycle of "adsorption, oxidation, regeneration and re-adsorption".

[0042] S4. Final purification and emission: The clean gas after adsorption and deep purification is discharged from the exhaust pipe 21 at the top of the adsorption tower 3 in compliance with standards.

[0043] The oxidation reactions in S1 and S2 are carried out at normal temperature and pressure. The water-based absorbent in S1 is a high-boiling-point, low-vapor-pressure, non-toxic and harmless liquid. The gas-liquid oxidation, liquid-liquid oxidation, gas-gas oxidation, gas mist oxidation, as well as gas-solid adsorption and regeneration processes are completed in a coordinated and continuous manner in the single oxidation tower 2 and adsorption tower 3, realizing multi-functionality of one tower.

[0044] It should be noted that the top spray liquid is further atomized and reacts with the exhaust gas in a gas-mist reaction. The huge specific surface area is used for the final stage of dissolution and oxidation. Thus, the oxidation tower completes the five-phase advanced oxidation of gas-liquid-liquid-gas-mist.

[0045] The working principle of the above embodiments is as follows:

[0046] The multi-component VOCs waste gas to be treated enters the bottom of the oxidation tower 2 tangentially or radially through the inlet pipe 12. The water-based absorbent liquid rich in hydroxyl radicals (·HO) is sprayed from top to bottom through the spray steel pipe 10. The waste gas flows from bottom to top under the action of pressure difference and passes through the bubble caps 7 on the three-layer tower plate 4 in sequence. On each tower plate 4, the waste gas bubbles through the gaps 8 and passes through the liquid holding layer. In this process, a violent gas-liquid oxidation reaction and liquid-liquid oxidation reaction are completed. The hydroxyl radicals attack the organic molecular chains non-selectively and degrade them initially.

[0047] After being processed in zone 4 of the tower, the gas-liquid mixture rises to the swirl plate 13, where it generates a high-speed swirling flow under the guidance of the blades. This greatly enhances the gas-liquid mass transfer efficiency and separates most of the liquid droplets. At the same time, a gaseous oxidant (such as ozone) is introduced into the top area of ​​the tower through the jet pipe 14, which reacts with the rising exhaust gas to completely decompose the low-boiling-point, small-molecule organic matter that was not captured by the liquid phase mass transfer. The top spray liquid is further atomized and reacts with the exhaust gas to form a gas mist. The huge specific surface area is used for the final stage of dissolution and oxidation. Thus, the oxidation tower completes the multiphase advanced oxidation of five forms: gas, liquid, gas, and mist.

[0048] The installation, connection, or setting methods disclosed in this embodiment are all common mechanical connection methods, and any method that achieves the desired beneficial effect can be implemented. Furthermore, all electrical components in this embodiment are electrically connected to the main controller and power supply. The main controller can be a conventional, known device such as a computer that performs control functions. Those skilled in the art can control the electrical components through simple programming, and the existing disclosed power connection technologies are common knowledge in the field. Therefore, this embodiment will not elaborate further on their specific structural composition and working principles.

[0049] 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 a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0050] 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. A multi-component VOCs complex phase advanced oxidation and high-efficiency absorption purification device, comprising a support base (1), characterized in that: The top of the support base (1) is respectively fixedly connected with an oxidation tower (2) and an adsorption tower (3), and the inside of the oxidation tower (2) is provided with a gas-liquid mixing structure capable of improving the gas-liquid reaction efficiency. The gas-liquid mixing structure comprises a tray (4) fixedly connected in the inside of the oxidation tower (2), the upper surface of the tray (4) is fixedly connected with a riser (5), the outside of the riser (5) is sleeved with a bubble cap (7), the outer surface of the bubble cap (7) is provided with a tooth gap (8) capable of allowing gas and liquid to pass, and the inside of the oxidation tower (2) is fixedly connected with a spray steel pipe (10).

2. The multi-component VOCs complex-phase advanced oxidation and efficient absorption purification device according to claim 1, characterized in that: The inside of the riser (5) is fixedly connected with a support plate (6), the top of the bubble cap (7) is slidably connected with a mounting bolt (9) extending into the inside of the support plate (6), the mounting bolt (9) and the support plate (6) are connected in a threaded connection mode, and the inside of the tray (4) is provided with a through hole with the same inner diameter as the riser (5). 3.The multi-component VOCs complexed advanced oxidation and high-efficiency absorption purification device according to claim 1, characterized in that: The number of the tray (4) is three, the three trays (4) are equidistantly distributed in the inside of the oxidation tower (2), and one end of the spray steel pipe (10) is fixedly connected with a liquid inlet pipeline (11) extending to the outside of the oxidation tower (2).

4. The multi-component VOCs complex-phase advanced oxidation and efficient absorption purification device according to claim 1, characterized in that: The inside of the oxidation tower (2) is fixedly connected with a cyclone plate (13), and the top of the inside of the oxidation tower (2) is fixedly connected with a gas injection pipeline (14).

5. The multi-component VOCs complex-phase advanced oxidation and efficient absorption purification device according to claim 1, characterized in that: The outer surface of the oxidation tower (2) is respectively fixedly connected with a gas inlet pipeline (12) and a liquid outlet pipeline (16) in communication with the inside thereof, and the gas inlet pipeline (12) is located above the liquid outlet pipeline (16). 6.The multi-component VOCs complexed advanced oxidation and high-efficiency absorption purification device according to claim 4, characterized in that: One end of the gas injection pipeline (14) is fixedly connected with a gas conveying pipe (15) extending to the outside of the oxidation tower (2), the top of the oxidation tower (2) is fixedly connected with a connector (17), and the connector (17) and the adsorption tower (3) are fixedly connected with a communication pipeline (18).

7. The multi-component VOCs complex-phase advanced oxidation and high-efficiency absorption purification device according to claim 1, characterized in that: The inside of the adsorption tower (3) is fixedly connected with an annular pipeline (19), and the bottom of the annular pipeline (19) is fixedly connected with an atomizing nozzle.

8. The multi-component VOCs complex-phase advanced oxidation and high-efficiency absorption purification device according to claim 1, characterized in that: The inside of the adsorption tower (3) is fixedly connected with a filler plate (20), the number of the filler plate (20) is three, the three filler plates (20) are all made of non-metallic materials, and the top of the adsorption tower (3) is fixedly connected with a smoke outlet pipeline (21) in communication with the inside thereof.

9. The purification method of the multi-component VOCs complex-phase advanced oxidation and high-efficiency absorption purification device, using the multi-component VOCs complex-phase advanced oxidation and high-efficiency absorption purification device according to any one of claims 1-8, characterized in that, The method comprises the following steps: S1, waste gas premixing and primary oxidation: a plurality of component VOCs waste gas to be treated is introduced into the bottom of the oxidation tower (2) through the gas inlet pipeline (12); the waste gas flows from bottom to top in the oxidation tower (2), and is in countercurrent contact with the water-based absorption liquid rich in hydroxyl radicals (·HO) sprayed through the spray steel pipe (10), the water-based absorption liquid is mainly anionic surfactant sodium citrate, in the rising process, the waste gas passes through the bubble caps (7) on the multiple trays (4) in sequence, is fully mixed with the absorption liquid through the tooth gaps (8) on the outer surfaces of the bubble caps (7), and a primary gas-liquid oxidation reaction is completed; meanwhile, part of the waste gas and the absorption liquid form a liquid layer on the tray (4) to perform a liquid-liquid oxidation reaction; S2, deep complex phase advanced oxidation: the waste gas after primary oxidation continues to rise, flows through the cyclone plate (13) in the middle of the oxidation tower (2), and is stirred by the cyclone under the guide of the cyclone plate (13), further strengthening the gas-liquid mass transfer and oxidation reaction, at the same time, additional gaseous oxidants (such as ozone or air) are introduced into the tower through the air injection pipe (14) at the top of the oxidation tower (2), so that the organic matter in the waste gas that has not been completely oxidized is subjected to gas-gas oxidation reaction with the gaseous oxidant, and the spray liquid is atomized at the top and forms a gas mist reaction with the waste gas, further dissolving and oxidizing the residual organic matter, in this process, hydroxyl radical (·HO) as the main oxidant, non-selectively oxidizes and decomposes organic matter into carbon dioxide, water and harmless substances; S3, gas-solid adsorption and filler regeneration: the gas treated by the oxidation tower (2) enters the bottom of the adsorption tower (3) through the connecting pipeline (18), and the gas passes through the filler plate (20) made of non-metallic material in the adsorption tower (3) from bottom to top, the residual organic pollutants in the waste gas are adsorbed on the surface of the filler, and the gas-solid reaction is completed to remove the pollutants, at the same time, the atomizing nozzle at the bottom of the annular pipeline (19) sprays the absorption liquid rich in oxidant to the filler layer, and the organic matter adsorbed on the surface of the filler is oxidized and decomposed by the gas and liquid oxidants, so as to realize the in-situ regeneration of the filler, forming a virtuous cycle of "adsorption-oxidation-regeneration-adsorption"; S4, final purification and discharge: the clean gas after adsorption and deep purification is discharged from the exhaust pipe (21) at the top of the adsorption tower (3) to meet the emission standard.

10. The purification method of the multi-component VOCs complex-phase advanced oxidation and high-efficiency absorption purification device according to claim 9, characterized in that: The oxidation reactions in S1 and S2 are carried out at normal temperature and pressure, the water-based absorption liquid in S1 is a liquid with high boiling point, low vapor pressure, non-toxic and harmless, the gas-liquid oxidation, liquid-liquid oxidation, gas-gas oxidation, gas mist oxidation and gas-solid adsorption and regeneration processes are completed in the single oxidation tower (2) and adsorption tower (3) in a coordinated and continuous manner, realizing one-tower multi-function.

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