Comprehensive treatment device for VOCs waste gas in oil refining and chemical industry

Abstract

The utility model relates to the technical field of waste gas treatment, in particular to an oil refining and chemical VOCs waste gas comprehensive treatment device which can concentrate VOCs waste gas to improve the concentration of harmful components and improve the catalytic oxidation efficiency. Comprising a pretreatment box, a separation box and an oxidation treatment box, the filter cartridge I and the filter cartridge II are concentrically mounted in the separation box, the filter cartridge II is positioned in the filter cartridge I, a macromolecular filter screen is arranged on the filter cartridge I, a molecular sieve is arranged on the filter cartridge II, an input end of the waste gas pipe is communicated with the upper part of a separation cavity of the separation box, and an output end of the waste gas pipe is communicated with the lower part of the separation cavity; a gas outlet pipe is arranged at the top of the separation box, the input end of the gas outlet pipe extends into the filter cartridge II, the output end of the gas outlet pipe is connected with a first port of a three-way valve I, and the input end of an oxidation gas pipe is connected with a second port of the three-way valve I; and the output end of the oxidation gas pipe extends into the oxidation chamber of the oxidation treatment box.

Description

Technical Field

[0001] This utility model relates to the technical field of waste gas treatment, and in particular to a comprehensive treatment device for VOCs waste gas from oil refining and chemical industries. Background Technology

[0002] VOCs waste gas from oil refining and chemical industries contains multiple components, thus requiring comprehensive treatment. Chinese utility model patent CN213528077U discloses a comprehensive treatment device for VOCs waste gas from oil refining and chemical industries. This device includes: a waste gas pretreatment device, a waste gas biological deodorization device, a gas mixer, an induced draft fan, a chimney, and an advanced oxidation device. The waste gas pretreatment device is connected to the waste gas biological deodorization device. The gas mixer has a first inlet, a second inlet, and an outlet. The waste gas biological deodorization device is connected to the gas mixer through the first inlet. The gas mixer is connected to the induced draft fan through the outlet. The induced draft fan is connected to the chimney. The advanced oxidation device is connected to the gas mixer through the second inlet. Ozone tail gas is used to perform advanced oxidation treatment on the biochemically treated VOCs waste gas.

[0003] However, the aforementioned waste gas integrated treatment device directly inputs VOCs waste gas into the gas mixer for catalytic oxidation treatment during ozone advanced oxidation treatment, without concentrating the harmful impurities in the VOCs waste gas, resulting in low efficiency of ozone catalytic oxidation. Utility Model Content

[0004] To solve the above-mentioned technical problems, this utility model provides a comprehensive VOCs waste gas treatment device for oil refining and chemical industry that can concentrate VOCs waste gas to increase the concentration of harmful components and improve catalytic oxidation efficiency.

[0005] This utility model discloses a comprehensive VOCs waste gas treatment device for oil refining and chemical industries, comprising a pretreatment box, a separation box, and an oxidation treatment box. The pretreatment box contains a pretreatment chamber, the separation box contains a separation chamber, and the oxidation treatment box contains an oxidation chamber. The pretreatment chamber of the pretreatment box is connected to the bottom of the separation chamber of the separation box via a gas supply pipe. It also includes a first filter cartridge, a second filter cartridge, a waste gas pipe, an oxidation gas pipe, and a three-way valve. The first and second filter cartridges are concentrically installed in the separation chamber of the separation box, with the second filter cartridge located inside the first filter cartridge. The first filter cartridge is equipped with a polymer filter screen to intercept harmful impurities in VOCs exhaust gas. Air components can pass through the polymer filter screen. The second filter cartridge is equipped with a molecular sieve to intercept nitrogen, while oxygen can pass through. The inlet end of the exhaust gas pipe is connected to the upper part of the separation chamber of the separation box. The inlet port of the exhaust gas pipe is located on the outside of the first filter cartridge, and the outlet end of the exhaust gas pipe extends into the oxidation chamber of the oxidation treatment box. An outlet pipe is installed at the top of the separation box. The inlet end of the outlet pipe extends into the interior of the second filter cartridge, and the outlet end... The first port of the three-way valve is connected, the inlet of the oxidizing gas pipe is connected to the second port of the three-way valve, and the outlet of the oxidizing gas pipe extends into the oxidation chamber of the oxidation treatment box. Catalyst packing is installed in the oxidation chamber of the oxidation treatment box. During operation, VOCs waste gas is input into the pretreatment chamber of the pretreatment box for pretreatment. The pretreated VOCs waste gas is then input through a pipeline to the outer layer of the separation chamber of the separation box. The VOCs waste gas flows between the outer wall of the filter cartridge and the inner wall of the separation box, and the air components in the VOCs waste gas pass through... The polymer filter screen of filter cartridge one enters between filter cartridge one and filter cartridge two, so that the harmful impurities in the VOCs waste gas are concentrated and then input into the oxidation chamber of the oxidation treatment box through the waste gas pipe. At the same time, the oxygen between filter cartridge one and filter cartridge two enters the interior of filter cartridge two through the molecular sieve. The oxygen is input into the oxidation chamber of the oxidation treatment box through the gas outlet pipe, three-way valve one and oxidation gas pipe, so that the concentrated VOCs waste gas and oxygen undergo efficient catalytic oxidation in the catalyst packing in the oxidation chamber of the oxidation treatment box, thereby improving the catalytic oxidation efficiency.

[0006] Preferably, it also includes spiral blades, which are installed between the inner wall of the separation box and the outer wall of the filter cartridge; the spiral blades divide the space between the inner wall of the separation box and the outer wall of the filter cartridge into a spiral upward channel, extending the movement path of VOCs exhaust gas and improving the concentration efficiency of VOCs exhaust gas.

[0007] Preferably, it also includes an ozone generator, the output pipe of which is connected to the third port of the three-way valve; the ozone generator produces ozone, the three-way valve switches, and the ozone is mixed with oxygen through the output pipe, the three-way valve and the oxidizing gas pipe and input into the oxidation chamber of the oxidation treatment box, so that the ozone is fully mixed with the concentrated VOCs waste gas and the catalytic oxidation efficiency is improved.

[0008] Preferably, it also includes a nozzle and an annular nozzle. The nozzle is installed on the output end of the exhaust pipe, and the annular nozzle is trumpet-shaped. The annular nozzle is sleeved outside the output port of the nozzle. The annular nozzle is hollow inside and has an outlet at its tip. The outlet is arranged in the same direction as the output port of the nozzle. The output end of the oxidation pipe is connected to the annular nozzle. The mixture of ozone and oxygen is input into the annular nozzle through the oxidation pipe and ejected through the outlet of the annular nozzle. Since the outlet of the annular nozzle is arranged around the output port of the nozzle, the mixture output by the annular nozzle can be fully mixed with the VOCs exhaust gas, thereby improving the catalytic oxidation efficiency.

[0009] Preferably, it also includes a duct and an axial flow fan. The duct is installed on the outlet pipe of the separator, and the axial flow fan is installed in the duct. The operation of the axial flow fan draws out the oxygen inside the filter cartridge and accelerates its delivery to the annular nozzle through the oxidation pipe. This increases the speed at which the ozone and oxygen mixture is ejected through the annular nozzle. Since the annular nozzle is trumpet-shaped, a low-pressure zone is formed inside the annular nozzle. This allows the gas in the oxidation chamber of the oxidation treatment box to be drawn in from the opening end of the annular nozzle and ejected again through the tip of the annular nozzle following the mixed gas. This causes the gas in the oxygen chamber of the oxidation treatment box to circulate and mix, improving the catalytic oxidation efficiency.

[0010] Preferably, the system also includes a residual discharge pipe, a second three-way valve, and a branch pipe. The input end of the residual discharge pipe extends between filter cartridge one and filter cartridge two, and the output end of the residual discharge pipe is connected to the first port of the second three-way valve. The input end of the branch pipe is connected to the second port of the second three-way valve, and the output end of the branch pipe is connected to the exhaust gas pipe. A hazardous gas sensor is installed between filter cartridge one and filter cartridge two. When there are no other hazardous components between filter cartridge one and filter cartridge two, the second three-way valve switches, allowing gases such as nitrogen between filter cartridge one and filter cartridge two to be discharged through the residual discharge pipe and the third port of the second three-way valve. When there are other hazardous components mixed between filter cartridge one and filter cartridge two, the second three-way valve switches, allowing the hazardous components between filter cartridge one and filter cartridge two to be input into the exhaust gas pipe through the residual discharge pipe, the second three-way valve, and the branch pipe, so that the hazardous components enter the oxidation chamber of the oxidation treatment box for catalytic oxidation treatment.

[0011] Preferably, the system also includes a circulating pump, a return pipe, a spray pipe, spray heads, and a stuffing disc. The output end of the return pipe is connected to the inlet of the circulating pump, and the input end of the return pipe extends into the bottom of the pretreatment chamber of the pretreatment box. The input end of the spray pipe is connected to the outlet of the circulating pump, and the output end of the spray pipe extends into the top of the pretreatment chamber of the pretreatment box. A spray head is installed at the output end of the spray pipe, and the spray head is equipped with multiple nozzles. The stuffing disc is installed in the middle of the pretreatment chamber of the pretreatment box. The treatment liquid is an alkaline solution or ammonia water, etc. The circulating pump operates to transport the treatment liquid through the spray pipe to the spray head and spray it downwards through multiple nozzles, so that the sprayed treatment liquid water mist sprays and treats the VOCs waste gas in the pretreatment chamber of the pretreatment box. The treatment liquid falls into the stuffing disc to form a water film, increasing the contact area between the treatment liquid and the VOCs waste gas. The water film is collected at the bottom of the pretreatment chamber of the pretreatment box and fed back into the circulating pump through the return pipe for circulation, thereby improving the pretreatment effect of VOCs waste gas.

[0012] Compared with the prior art, the beneficial effects of this utility model are as follows: The oxidation chamber of the oxidation treatment box is equipped with catalyst packing. During operation, VOCs waste gas is input into the pretreatment chamber of the pretreatment box for pretreatment. The pretreated VOCs waste gas is then input into the outer layer of the separation chamber of the separation box through a pipeline. The VOCs waste gas flows between the outer wall of filter cartridge one and the inner wall of the separation box. The air component in the VOCs waste gas enters between filter cartridge one and filter cartridge two through the polymer filter screen of filter cartridge one, so that the harmful impurities in the VOCs waste gas are concentrated and then input into the oxidation chamber of the oxidation treatment box through the waste gas pipe. At the same time, the oxygen between filter cartridge one and filter cartridge two enters the interior of filter cartridge two through the molecular sieve. The oxygen is input into the interior of the oxidation chamber of the oxidation treatment box through the gas outlet pipe, three-way valve one and oxidation gas pipe, so that the concentrated VOCs waste gas and oxygen undergo efficient catalytic oxidation in the catalyst packing in the oxidation chamber of the oxidation treatment box, thereby improving the catalytic oxidation efficiency. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the structure of this utility model;

[0014] Figure 2 This is a front sectional view of the present invention;

[0015] Figure 3 This is a schematic diagram of the isometric structure of this utility model;

[0016] Figure 4 This is a structural schematic diagram of the separation box in partial cross-section.

[0017] Figure 5 It is a structural diagram of the exhaust gas pipe, oxidation gas pipe, three-way valve one, ozone generator, nozzle one, and ring nozzle, etc.

[0018] Figure 6 yes Figure 2 A magnified schematic diagram of the partial structure at point A in the middle;

[0019] Figure 7 It is a structural diagram of the pretreatment box, circulating pump, return pipe, spray pipe, spray head and stuffing disc.

[0020] The following are labels in the attached diagram: 1. Pretreatment box; 2. Separation box; 3. Oxidation treatment box; 4. Filter cartridge one; 5. Filter cartridge two; 6. Exhaust gas pipe; 7. Oxidation gas pipe; 8. Three-way valve one; 9. Ozone generator; 10. Nozzle one; 11. Annular nozzle; 12. Duct pipe; 13. Axial flow fan; 14. Residual discharge pipe; 15. Three-way valve two; 16. Branch pipe; 17. Circulation pump; 18. Return pipe; 19. Spray pipe; 20. Spray head; 21. Stuffing disc; 22. Spiral blade. Detailed Implementation

[0021] To facilitate understanding of this utility model, a more complete description will be given below with reference to the accompanying drawings. This utility model can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided to make the disclosure of this utility model more thorough and complete. Example 1

[0022] like Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 7As shown, a comprehensive VOCs waste gas treatment device for oil refining and chemical industry includes a pretreatment box (1), a separation box (2), and an oxidation treatment box (3). The pretreatment box (1) is equipped with a pretreatment chamber, the separation box (2) is equipped with a separation chamber, and the oxidation treatment box (3) is equipped with an oxidation chamber. The pretreatment chamber of the pretreatment box (1) is connected to the bottom of the separation chamber of the separation box (2) through a gas supply pipe. It also includes a filter cartridge 1 (4), a filter cartridge 2 (5), a waste gas pipe (6), an oxidation gas pipe (7), and a three-way valve 1 (8). The filter cartridge 1 (4) and the filter cartridge 2 (5) are both concentrically installed in the separation box (2). In the separation chamber of the separation box (2), filter cartridge 2 (5) is located inside filter cartridge 1 (4). A polymer filter screen is installed on filter cartridge 1 (4) to intercept harmful impurities in VOCs exhaust gas. Air components can pass through the polymer filter screen. A molecular sieve is installed on filter cartridge 2 (5) to intercept nitrogen. Oxygen can pass through the molecular sieve. The inlet end of the exhaust pipe (6) is connected to the upper part of the separation chamber of the separation box (2). The inlet port of the exhaust pipe (6) is located outside the filter cartridge 1 (4). The outlet end of the exhaust pipe (6) extends into the oxidation chamber of the oxidation treatment box (3). The top of the separation box (2) is equipped with an outlet. The air pipe has its inlet end extending into the interior of filter cartridge 2 (5), and its outlet end connected to the first port of three-way valve 1 (8). The inlet end of the oxidation air pipe (7) is connected to the second port of three-way valve 1 (8), and its outlet end extends into the oxidation chamber of the oxidation treatment box (3). It also includes a spiral blade (22), which is installed between the inner wall of the separation box (2) and the outer wall of filter cartridge 1 (4). Furthermore, it includes an ozone generator (9), whose outlet pipe is connected to the third port of three-way valve 1 (8). It also includes a circulation pump (17) and a return pipe (…). 18), spray pipe (19), spray head (20) and stuffing disc (21), the output end of the return pipe (18) is connected to the inlet of the circulation pump (17), the input end of the return pipe (18) extends into the bottom of the pretreatment chamber of the pretreatment box (1), the input end of the spray pipe (19) is connected to the outlet of the circulation pump (17), the output end of the spray pipe (19) extends into the top of the pretreatment chamber of the pretreatment box (1), the output end of the spray pipe (19) is installed with the spray head (20), the spray head (20) is equipped with multiple nozzles, and the stuffing disc (21) is installed in the middle of the pretreatment chamber of the pretreatment box (1).

[0023] Catalyst packing is installed in the oxidation chamber of the oxidation treatment box (3). During operation, the treatment liquid is alkaline solution or ammonia water, etc. The circulation pump (17) operates to transport the treatment liquid to the spray head (20) through the spray pipe (19) and spray it downward through multiple nozzles, so that the sprayed treatment liquid water mist sprays the VOCs waste gas in the pretreatment chamber of the pretreatment box (1). The treatment liquid falls into the packing plate (21) to form a water film, increasing the contact area between the treatment liquid and the VOCs waste gas. It is collected at the bottom of the pretreatment chamber of the pretreatment box (1) and fed into the circulation pump (17) through the return pipe (18) for circulation. The pretreated VOCs waste gas is fed into the outer layer of the separation chamber of the separation box (2) through the pipeline. The VOCs waste gas is separated by the spiral blades (22) between the outer wall of the filter cartridge (4) and the inner wall of the separation box (2). The air component in the VOCs waste gas flows through the polymer filter screen of filter cartridge 1 (4) and enters between filter cartridge 1 (4) and filter cartridge 2 (5), so that the harmful impurities in the VOCs waste gas are concentrated and then input into the oxidation chamber of the oxidation treatment box (3) through the waste gas pipe (6). At the same time, the oxygen between filter cartridge 1 (4) and filter cartridge 2 (5) enters the interior of filter cartridge 2 (5) through the molecular sieve. The oxygen is transported through the outlet pipe, three-way valve 1 (8) and oxidation gas pipe (7). The ozone generator (9) generates ozone. The three-way valve 1 (8) is switched. The ozone is mixed with the oxygen through the output pipe, three-way valve 1 (8) and oxidation gas pipe (7) and input into the oxidation chamber of the oxidation treatment box (3), so that the ozone is fully mixed with the concentrated VOCs waste gas and carried out efficient catalytic oxidation in the catalyst packing, thereby improving the catalytic oxidation efficiency. Example 2

[0024] like Figure 1 , Figure 2 , Figure 5 and Figure 6 As shown, based on Example 1, it also includes a nozzle (10) and an annular nozzle (11). The nozzle (10) is installed on the output end of the exhaust pipe (6). The annular nozzle (11) is trumpet-shaped and is sleeved on the outside of the output port of the nozzle (10). The annular nozzle (11) is hollow inside and has an outlet at the tip. The outlet is set in the same direction as the output port of the nozzle (10). The output end of the oxidation pipe (7) is connected to the annular nozzle (11). It also includes a duct pipe (12) and an axial flow fan (13). The duct pipe (12) is installed on the exhaust pipe of the separation box (2), and the axial flow fan (13) is installed in the duct pipe (12).

[0025] The ozone and oxygen mixture is fed into the annular nozzle (11) through the oxidation pipe (7) and ejected through the outlet of the annular nozzle (11). Since the outlet of the annular nozzle (11) is set around the output port of the nozzle one (10), the mixture output by the annular nozzle (11) can be fully mixed with the VOCs waste gas. The axial flow fan (13) runs to extract the oxygen inside the filter cartridge two (5) and accelerate its delivery to the annular nozzle (11) through the oxidation pipe (7), thereby increasing the speed at which the ozone and oxygen mixture is ejected through the annular nozzle (11). Since the annular nozzle (11) is trumpet-shaped, a low-pressure zone is formed inside the annular nozzle (11), allowing the gas in the oxidation chamber of the oxidation treatment box (3) to be drawn in from the opening end of the annular nozzle (11) and ejected again through the tip of the annular nozzle (11) following the mixture. This allows the gas in the oxygen chamber of the oxidation treatment box (3) to circulate and mix, thereby improving the catalytic oxidation efficiency. Example 3

[0026] like Figure 1 , Figure 2 and Figure 4 As shown, based on Example 1, it also includes a discharge pipe (14), a three-way valve (15) and a branch pipe (16). The input end of the discharge pipe (14) extends between the filter cartridge (4) and the filter cartridge (5). The output end of the discharge pipe (14) is connected to the first port of the three-way valve (15). The input end of the branch pipe (16) is connected to the second port of the three-way valve (15). The output end of the branch pipe (16) is connected to the exhaust pipe (6).

[0027] A hazardous gas sensor is installed between filter cartridge 1 (4) and filter cartridge 2 (5). When there are no other hazardous components between filter cartridge 1 (4) and filter cartridge 2 (5), the three-way valve 2 (15) switches, allowing gases such as nitrogen between filter cartridge 1 (4) and filter cartridge 2 (5) to be discharged through the residual pipe (14) and the third port of the three-way valve 2 (15). When there are other hazardous components mixed between filter cartridge 1 (4) and filter cartridge 2 (5), the three-way valve 2 (15) switches, allowing the hazardous components between filter cartridge 1 (4) and filter cartridge 2 (5) to be input into the exhaust pipe (6) through the residual pipe (14), the three-way valve 2 (15) and the branch pipe (16), so that the hazardous components enter the oxidation chamber of the oxidation treatment box (3) for catalytic oxidation treatment.

[0028] like Figures 1 to 7As shown, this utility model discloses a comprehensive VOCs waste gas treatment device for oil refining and chemical industry. During operation, the VOCs waste gas is first input into the pretreatment chamber of the pretreatment box (1) for pretreatment. After pretreatment, the VOCs waste gas is input through a pipeline to the outer layer of the separation chamber of the separation box (2). Then, the VOCs waste gas flows along the spiral blades (22) between the outer wall of filter cartridge one (4) and the inner wall of the separation box (2). The air components in the VOCs waste gas enter the space between filter cartridge one (4) and filter cartridge two (5) through the polymer filter screen of filter cartridge one (4). When there are no other harmful components between filter cartridge one (4) and filter cartridge two (5), the three-way valve two (15) switches, allowing gases such as nitrogen between filter cartridge one (4) and filter cartridge two (5) to be discharged through the residual discharge pipe (14) and the third port of the three-way valve two (15). Then… The harmful impurities in the VOCs waste gas are concentrated and then fed into the oxidation chamber of the oxidation treatment box (3) through the waste gas pipe (6) and nozzle one (10). At the same time, the oxygen between filter cartridge one (4) and filter cartridge two (5) enters the interior of filter cartridge two (5) through the molecular sieve. The axial flow fan (13) runs to extract the oxygen inside filter cartridge two (5) and accelerates it to be delivered to the annular nozzle (11) through the oxidation gas pipe (7). The ozone and oxygen mixture is sprayed out through the outlet of the annular nozzle (11). Since the outlet of the annular nozzle (11) is set around the output port of nozzle one (10), the mixture output by the annular nozzle (11) can be fully mixed with the VOCs waste gas. Finally, the concentrated VOCs waste gas and oxygen can be efficiently catalytically oxidized in the catalyst packing in the oxidation chamber of the oxidation treatment box (3).

[0029] The main functions achieved by this utility model are:

[0030] 1. It can concentrate VOCs waste gas, increase the concentration of harmful components, and improve catalytic oxidation efficiency;

[0031] 2. By setting the annular nozzle (11), the ozone and oxygen mixture can be fully mixed with the VOCs waste gas, thereby improving the catalytic oxidation efficiency;

[0032] 3. By circulating the mixture of ozone and oxygen with VOCs waste gas in the oxidation treatment box (3), the catalytic oxidation efficiency is improved.

[0033] The VOCs waste gas comprehensive treatment device of this utility model is installed, connected or set in a common mechanical way. As long as it can achieve its beneficial effect, it can be implemented. The pretreatment box (1), separation box (2), oxidation treatment box (3), filter cartridge one (4), filter cartridge two (5), three-way valve one (8), ozone generator (9), nozzle one (10), duct pipe (12), axial flow fan (13), three-way valve two (15), circulation pump (17), spray head (20), stuffing disc (21) and spiral blade (22) of the VOCs waste gas comprehensive treatment device of this utility model are purchased from the market. Technical personnel in this industry only need to install and operate it according to the accompanying instruction manual, without the need for technical personnel in this field to make creative efforts.

[0034] All technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0035] The above description is only a preferred embodiment of the present utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the technical principles of the present utility model, and these improvements and modifications should also be considered within the protection scope of the present utility model.

Claims

1. An oil refining and chemical VOCs waste gas comprehensive treatment device, comprising a pretreatment box (1), a separation box (2) and an oxidation treatment box (3), a pretreatment chamber is arranged in the interior of the pretreatment box (1), a separation chamber is arranged in the interior of the separation box (2), an oxidation chamber is arranged in the interior of the oxidation treatment box (3), and the pretreatment chamber of the pretreatment box (1) is communicated with the bottom of the separation chamber of the separation box (2) through a gas feeding pipe; characterized in that, The device further comprises a filter cylinder one (4), a filter cylinder two (5), a waste gas pipe (6), an oxidation gas pipe (7), and a three-way valve one (8). The filter cylinder one (4) and the filter cylinder two (5) are concentrically installed in the separation chamber of the separation box (2), and the filter cylinder two (5) is located inside the filter cylinder one (4). A high-molecular filter screen is arranged on the filter cylinder one (4) and used for intercepting harmful impurities in the VOCs waste gas. Air components can pass through the high-molecular filter screen. A molecular sieve is arranged on the filter cylinder two (5) and used for intercepting nitrogen. Oxygen can pass through the molecular sieve. The input end of the waste gas pipe (6) is in communication with the upper part of the separation chamber of the separation box (2), and the input port of the waste gas pipe (6) is located outside the filter cylinder one (4). The output end of the waste gas pipe (6) extends into the oxidation chamber of the oxidation treatment box (3). The top of the separation box (2) is provided with an air outlet pipe. The input end of the air outlet pipe extends into the inside of the filter cylinder two (5). The output end of the air outlet pipe is connected with the first port of the three-way valve one (8). The input end of the oxidation gas pipe (7) is connected with the second port of the three-way valve one (8). The output end of the oxidation gas pipe (7) extends into the oxidation chamber of the oxidation treatment box (3).

2. The integrated treatment device for refining and chemical VOCs exhaust gas according to claim 1, characterized in that, The device further comprises a spiral blade (22) installed between the inner wall of the separation box (2) and the outer wall of the filter cylinder one (4).

3. The integrated treatment device for oil refining and chemical VOCs exhaust gas according to claim 1, characterized in that, The device further comprises an ozone generator (9) with an output pipe connected with the third port of the three-way valve one (8).

4. The integrated treatment device for oil refining and chemical VOCs exhaust gas according to claim 3, characterized in that, The device further comprises a nozzle one (10) and a ring-shaped nozzle (11). The nozzle one (10) is arranged on the output end of the waste gas pipe (6). The ring-shaped nozzle (11) is in the shape of a horn. The ring-shaped nozzle (11) is sleeved outside the output port of the nozzle one (10). The ring-shaped nozzle (11) is hollow inside and is provided with an air outlet at the tip. The air outlet is arranged in the same direction as the output port of the nozzle one (10). The output end of the oxidation gas pipe (7) is in communication with the ring-shaped nozzle (11).

5. The integrated treatment device for oil refining and chemical VOCs exhaust gas according to claim 4, characterized in that, The device further comprises a duct pipe (12) and an axial flow fan (13). The duct pipe (12) is arranged on the air outlet pipe of the separation box (2). The axial flow fan (13) is arranged in the duct pipe (12).

6. The integrated treatment device for refining and chemical VOCs exhaust gas according to claim 1, characterized in that, The device further comprises a residual pipe (14), a three-way valve two (15), and a branch pipe (16). The input end of the residual pipe (14) extends into the space between the filter cylinder one (4) and the filter cylinder two (5). The output end of the residual pipe (14) is connected with the first port of the three-way valve two (15). The input end of the branch pipe (16) is connected with the second port of the three-way valve two (15). The output end of the branch pipe (16) is connected with the waste gas pipe (6).

7. The integrated treatment device for oil refining and chemical VOCs exhaust gas according to claim 1, characterized in that, Also include circulating pump (17), backflow pipe (18), spray pipe (19), spray head (20) and filler plate (21), the output end of backflow pipe (18) is connected with the import of circulating pump (17), the input end of backflow pipe (18) is connected with the bottom of the pretreatment chamber of pretreatment box (1), the input end of spray pipe (19) is connected with the export of circulating pump (17), the output end of spray pipe (19) is inserted into the top of the pretreatment chamber of pretreatment box (1), the output end of spray pipe (19) is installed spray head (20), spray head (20) is provided with multiple spray heads, filler plate (21) is installed in the middle of the pretreatment chamber of pretreatment box (1).

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