Waste gas recovery device for VOC (volatile organic compound) treatment

Abstract

The utility model relates to the technical field of waste gas recovery, in particular to a waste gas recovery device for VOC (Volatile Organic Compounds) treatment, which comprises a box body, support legs, a first treatment box, a second treatment box, a third treatment box and a box door, the support legs are arranged at the bottom of the box body, the first treatment box, the second treatment box and the third treatment box are sequentially arranged in the box body, and the box door is arranged at the bottom of the box body. The box door is used for recycling waste gas and is arranged on the box body; the second treatment box comprises a second separation chamber, a second air inlet pipe, a transmission shaft, a rotating fan, blades, an exhaust hole, a liquid inlet pipe, a liquid discharge pipe, an electric valve and a third air inlet pipe. Blades in the second treatment box are matched with exhaust holes in a sealing plate, so that bubbles generated by waste gas in the absorption liquid are finer, volatile compounds in the waste gas can be dissolved in the absorption liquid more efficiently, and the recovery rate of the volatile compounds in the waste gas is increased.

Description

Technical Field

[0001] The utility model relates to the technical field of waste gas recovery, in particular to a waste gas recovery device for VOC treatment. Background Art

[0002] VOC stands for volatile organic compounds. In the ordinary sense, VOC refers to volatile organic compounds, but in the environmental sense, it refers to a class of active volatile organic compounds, that is, the type of volatile organic compounds that can cause harm. In many industrial productions, a large amount of waste gas is generated, causing serious pollution to the environment. Therefore, these waste gases need to be recycled and treated to protect the environment. For example, a VOC treatment gas recovery device with announcement number CN221333402U includes a base plate, a support leg fixedly connected to the top of the base plate, a main housing fixedly connected to the top of the support leg, a first-effect treatment tank disposed on one side of the main housing, an air inlet disposed on one side of the first-effect treatment tank, and a second-effect treatment tank and a third-effect treatment tank disposed within the main housing. The VOC treatment gas recovery device uses the first-effect treatment tank to perform preliminary filtration on the exhaust gas drawn into the main housing. The third-effect treatment tank allows for adsorption, screening, and filtration of the exhaust gas, achieving three-stage filtration and ensuring effective filtration. The water pump and atomizer work in concert to atomize water in the water tank through a water pipe, atomizer, atomizing barrel, and atomizing plate, and then spray it into the second-effect treatment tank, thereby performing secondary treatment on the exhaust gas in the second-effect treatment tank. The device utilizes atomized liquid to absorb volatile compounds within the exhaust gas. While this absorption efficiency is high, the atomized liquid is easily carried away by the flowing exhaust gas, potentially causing environmental damage after the gas is discharged. Utility Model Content

[0003] The purpose of this section is to summarize some aspects of the embodiments of the present invention and briefly introduce some preferred embodiments. Some simplifications or omissions may be made in this section and in the abstract and title of the utility model to avoid obscuring the purpose of this section, the abstract and the title of the utility model, and such simplifications or omissions shall not be used to limit the scope of the present invention.

[0004] The technical problem to be solved by the utility model is how to improve the recovery rate of waste gas.

[0005] In order to solve the above technical problems, the present invention provides the following technical solutions: an exhaust gas recovery device for VOC treatment, comprising a box body, a support leg, a first treatment box, a second treatment box, a third treatment box and a box door, wherein the support leg is arranged at the bottom of the box body, the first treatment box, the second treatment box and the third treatment box are arranged in sequence in the box body for recovering exhaust gas, and the box door is arranged on the box body;

[0006] The second treatment box includes a second separation chamber, a second air inlet pipe, a transmission shaft, a rotating fan, blades, exhaust holes, a liquid inlet pipe, a liquid drain pipe, an electric valve and a third air inlet pipe. The second separation chamber is arranged in the box body, and the second separation chamber is connected with the first treatment box through the second air inlet pipe. A sealing plate is provided at the bottom of the second air inlet pipe, and the bottom of the second air inlet pipe is sunk in the absorption liquid. The transmission shaft is arranged at the bottom end of the second air inlet pipe, and the transmission shaft passes through the sealing plate. The rotating fan is arranged at the top of the transmission shaft, the blades are arranged at the bottom of the transmission shaft, and the blades are outside the sealing plate. The exhaust holes are evenly opened on the sealing plate. The second separation chamber is connected with the external absorption liquid through the liquid inlet pipe, and the liquid drain pipe is arranged at the bottom of the second separation chamber. The electric valve is arranged on the liquid inlet pipe and the liquid drain pipe, and the third air inlet pipe is arranged on one side of the top of the second separation chamber to realize the second recovery of waste gas.

[0007] As a preferred solution of the waste gas recovery device for VOC treatment described in the utility model, wherein: the first processing box includes a first separation chamber, a filter plate, a first air inlet pipe and a switch door, the first separation chamber is arranged on one side of the second separation chamber, the filter plate is arranged in the first separation chamber, the first separation chamber is connected to the external waste gas through the first air inlet pipe, the first separation chamber is connected to the second separation chamber through the second air inlet pipe, and the switch door is arranged on the first separation chamber to realize the first recovery of the waste gas.

[0008] As a preferred solution of the waste gas recovery device for VOC treatment described in the utility model, the third treatment box includes a third separation chamber, a water inlet chamber, a condensation chamber, a drainage chamber, a condensation pipe, a water inlet pipe, a drainage pipe, a return liquid pipe and an air outlet pipe. The third separation chamber is arranged on the side of the second separation chamber away from the first separation chamber, and the water inlet chamber, condensation chamber and drainage chamber are arranged in sequence in the third separation chamber. The condensation pipe is arranged in the condensation chamber, and the liquid inlet and liquid outlet of the condensation pipe are respectively connected with the water inlet chamber and the drainage chamber. The water inlet pipe is arranged at the top of the water inlet chamber in the third separation chamber, and the drainage pipe is arranged at the bottom of the drainage chamber in the third separation chamber. The condensation chamber is connected with the drainage pipe through the return liquid pipe, and the air outlet pipe is arranged at the top of one side of the third separation chamber. The air outlet pipe is connected with the condensation chamber to realize the third recovery of waste gas.

[0009] As a preferred solution of the waste gas recovery device for VOC treatment described in the utility model, a control console is provided on the box door to facilitate the control of the entry and discharge of waste gas, the inflow and outflow of condensed water, and the inflow and discharge of absorption liquid.

[0010] As a preferred solution of the waste gas recovery device for VOC treatment described in the utility model, baffles are evenly and staggeredly arranged in the condensing chamber to lengthen the distance the waste gas flows through the condensing chamber, thereby increasing the heat exchange time between the waste gas and the condensing tube, and further improving the recovery rate of the waste gas.

[0011] As a preferred solution of the waste gas recovery device for VOC treatment described in the utility model, an observation window is provided on the front side of the second separation chamber to facilitate observation of the situation in the second separation chamber.

[0012] Beneficial effect: The blades in the second treatment box cooperate with the exhaust holes on the sealing plate to make the bubbles generated by the exhaust gas in the absorption liquid more dense, and the volatile compounds in the exhaust gas can be more efficiently dissolved in the absorption liquid, thereby improving the recovery rate of the exhaust gas. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for describing the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without inventive work. Among them:

[0014] Figure 1 This is a schematic diagram of the overall structure of the waste gas recovery device used for VOC treatment.

[0015] Figure 2 This is a schematic diagram of the position structure of the first processing box, the second processing box and the third processing box of the waste gas recovery device for VOC treatment.

[0016] Figure 3 A partial cross-sectional view of the first processing box of the exhaust gas recovery device for VOC treatment.

[0017] Figure 4 This is a schematic diagram of the internal structure of the second treatment box of the waste gas recovery device for VOC treatment.

[0018] Figure 5 This is a schematic diagram of the position structure of the blades and exhaust holes of the exhaust gas recovery device used for VOC treatment.

[0019] Figure 6 This is a schematic diagram of the internal structure of the third treatment box of the waste gas recovery device for VOC treatment.

[0020] In the figure: 101, box body; 102, support leg; 103, box door; 104, control console; 201, first air inlet pipe; 202, switch door; 203, first separation chamber; 204, filter plate; 301, second separation chamber; 302, second air inlet pipe; 303, rotating fan; 304, transmission shaft; 305, blade; 306, exhaust hole; 307, liquid inlet pipe; 308, liquid discharge pipe; 309, electric valve; 310, third air inlet pipe; 401, third separation chamber; 402, water inlet pipe; 403, drain pipe; 404, liquid return pipe; 405, air outlet pipe; 406, baffle; 407, condenser; 408, water inlet chamber; 409, drain chamber; 410, condenser chamber. DETAILED DESCRIPTION

[0021] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific implementation methods of the present invention are described in detail below with reference to the accompanying drawings.

[0022] In the following description, many specific details are set forth to facilitate a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Those skilled in the art may make similar generalizations without violating the connotation of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0023] Secondly, the term "one embodiment" or "embodiment" herein refers to a specific feature, structure, or characteristic that may be included in at least one implementation of the present invention. The phrase "in one embodiment" appearing in various places throughout this specification does not necessarily refer to the same embodiment, nor does it refer to a separate or selective embodiment that is mutually exclusive with other embodiments.

[0024] Example

[0025] Reference Figures 1 to 6, this embodiment provides a waste gas recovery device for VOC treatment, including a box body 101, a support leg 102, a first treatment box, a second treatment box, a third treatment box and a box door 103, the support leg 102 is arranged at the bottom of the box body 101, the first treatment box, the second treatment box and the third treatment box are arranged in sequence in the box body 101 for recovering waste gas, and the box door 103 is arranged on the box body 101; the second treatment box includes a second separation chamber 301, a second air inlet pipe 302, a transmission shaft 304, a rotating fan 303, blades 305, an exhaust hole 306, a liquid inlet pipe 307, a liquid discharge pipe 308, an electric valve 309 and a third air inlet pipe 310, the second separation chamber 301 is arranged in the box body 101, and the second separation chamber 301 passes through the first The second air inlet pipe 302 is connected to the first processing box, and a sealing plate is provided at the bottom of the second air inlet pipe 302. The bottom of the second air inlet pipe 302 is submerged in the absorption liquid. The transmission shaft 304 is provided at the bottom end of the second air inlet pipe 302, and the transmission shaft 304 passes through the sealing plate. The rotating fan 303 is provided at the top of the transmission shaft 304, and the blades 305 are provided at the bottom of the transmission shaft 304. The blades 305 are outside the sealing plate, and the exhaust holes 306 are evenly opened on the sealing plate. The second separation chamber 301 is connected to the external absorption liquid through the liquid inlet pipe 307, and the drain pipe 308 is provided at the bottom of the second separation chamber 301. The electric valve 309 is provided on the liquid inlet pipe 307 and the drain pipe 308. The third air inlet pipe 310 is provided on one side of the top of the second separation chamber 301.

[0026] The box body 101 is a rectangular parallelepiped structure, which serves as the installation base of the present device. Four legs 102 are installed at the bottom of the box body 101 to provide a certain support for the box body 101. A first treatment box, a second treatment box, and a third treatment box are installed in sequence from left to right inside the box body 101. The first treatment box, the second treatment box, and the third treatment box respectively realize three-stage recovery of exhaust gas. A double-opening box door 103 is installed on the box body 101 to facilitate maintenance of the first treatment box, the second treatment box, and the third treatment box in the box body 101, and a handle is installed on the box door 103 to facilitate opening of the box door 103.

[0027] The second processing box is mainly composed of a second separation chamber 301, a second air inlet pipe 302, a transmission shaft 304, a rotating fan 303, blades 305, an exhaust hole 306, a liquid inlet pipe 307, a liquid discharge pipe 308, an electric valve 309 and a third air inlet pipe 310. The second separation chamber 301 is installed near the middle position of the box body 101. The second air inlet pipe 302 is installed on the left inner wall of the second separation chamber 301. The air inlet end of the second air inlet pipe 302 is connected to the interior of the first processing box on the left side of the second separation chamber 301. The air outlet end of the second air inlet pipe 302 is funnel-shaped, and a sealing plate is installed at the air outlet end of the second air inlet pipe 302. , exhaust holes 306 are evenly opened on the sealing plate, and the outlet end of the second air inlet pipe 302 is sunk in the absorption liquid, so that the exhaust gas entering the second air inlet pipe 302 can flow out and fully contact with the absorption liquid. A transmission shaft 304 is installed at the outlet end of the second air inlet pipe 302, and the top of the transmission shaft 304 is in the round tube of the second air inlet pipe 302. A rotating fan 303 is installed on the top of the transmission shaft 304, and the bottom of the transmission shaft 304 passes through the sealing plate. The transmission shaft 304 is rotatably connected to the sealing plate, and blades 305 are installed at the bottom of the transmission shaft 304. The blades 305 are outside the sealing plate of the second air inlet pipe 302, and the blades 305 It is in the shape of a blade so as to "cut off" the exhaust gas so that it cannot form large bubbles, and the blade-shaped blade 305 is subject to less resistance in the absorption liquid. The blade 305 cooperates with the exhaust hole 306 on the sealing plate to make the bubbles generated by the exhaust gas in the absorption liquid more dense, and the volatile compounds in the exhaust gas can be more efficiently dissolved in the absorption liquid, thereby improving the recovery rate of the volatile compounds in the exhaust gas; a liquid inlet pipe 307 is installed at the bottom of the left side of the second separation chamber 301, and the liquid outlet of the liquid inlet pipe 307 is connected to the interior of the second separation chamber 301, and the liquid inlet of the liquid inlet pipe 307 is outside the box body 101 and is in contact with the external absorption liquid. The second separation chamber 301 is connected so as to transport the external absorption liquid to the interior of the second separation chamber 301. A drain pipe 308 is installed at the bottom of the second separation chamber 301 to discharge the saturated absorption liquid out of the second separation chamber 301. In this embodiment, electric valves 309 are also installed on the inlet pipe 307 and the drain pipe 308 to control the entry and discharge of the absorption liquid. A third air inlet pipe 310 is installed on the right side of the top of the second separation chamber 301. The air inlet of the third air inlet pipe 310 is connected to the interior of the second separation chamber 301, and the air outlet of the third air inlet pipe 310 is connected to the interior of the third treatment box, so as to transport the exhaust gas to the third treatment box.

[0028] The first processing box includes a first separation chamber 203, a filter plate 204, a first air inlet pipe 201 and a switch door 202. The first separation chamber 203 is arranged on one side of the second separation chamber 301, the filter plate 204 is arranged in the first separation chamber 203, the first separation chamber 203 is connected to the external exhaust gas through the first air inlet pipe 201, the first separation chamber 203 is connected to the second separation chamber 301 through the second air inlet pipe 302, and the switch door 202 is arranged on the first separation chamber 203.

[0029] The first treatment box is mainly composed of a first separation chamber 203, a filter plate 204, a first air inlet pipe 201 and a switch door 202. The first separation chamber 203 is installed on the left side of the second separation chamber 301. The filter plate 204 is installed inside the first separation chamber 203 to facilitate filtering and intercepting large particles of impurities in the exhaust gas to achieve the first recovery of the exhaust gas; the first air inlet pipe 201 is installed on the left side of the first separation chamber 203. The air outlet of the first air inlet pipe 201 is connected to the interior of the first separation chamber 203. The air inlet of the first air inlet pipe 201 is in the box body 1 01, it is connected with the external exhaust gas, the right side of the second separation chamber 301 is connected to the second air inlet pipe 302, and the air inlet of the second air inlet pipe 302 is connected with the interior of the second separation chamber 301, so that the exhaust gas in the first separation chamber 203 can flow into the second separation chamber 301, and a switch door 202 is installed on the first separation chamber 203, and a handle is installed on the switch door 202 to facilitate the replacement of the filter plate 204. It should be noted that there is high airtightness between the switch door 202 and the first separation chamber 203 to prevent the exhaust gas from flowing out through the switch door 202.

[0030] The third treatment box includes a third separation chamber 401, a water inlet chamber 408, a condensation chamber 410, a drainage chamber 409, a condensation pipe 407, a water inlet pipe 402, a drainage pipe 403, a liquid return pipe 404 and an air outlet pipe 405. The third separation chamber 401 is arranged on the side of the second separation chamber 301 away from the first separation chamber 203. The water inlet chamber 408, the condensation chamber 410 and the drainage chamber 409 are arranged in the third separation chamber 401 in sequence. The condensation pipe 407 is arranged in the condensation chamber 410. Inside, the liquid inlet and liquid outlet of the condenser 407 are connected to the water inlet chamber 408 and the drainage chamber 409 respectively, the water inlet pipe 402 is arranged at the top of the water inlet chamber 408 in the third separation chamber 401, the drainage pipe 403 is arranged at the bottom of the drainage chamber 409 in the third separation chamber 401, the condensation chamber 410 is connected to the drainage pipe 308 through the return liquid pipe 404, and the air outlet pipe 405 is arranged at the top of one side of the third separation chamber 401, and the air outlet pipe 405 is connected to the condensation chamber 410.

[0031] The third treatment box is mainly composed of a third separation chamber 401, a water inlet chamber 408, a condensation chamber 410, a drainage chamber 409, a condensation pipe 407, a water inlet pipe 402, a drainage pipe 403, a liquid return pipe 404 and an air outlet pipe 405. The third separation chamber 401 is installed on the right side of the second separation chamber 301. The water inlet chamber 408, the condensation chamber 410 and the drainage chamber 409 are separated from left to right in the third separation chamber 401 by a partition. A The water inlet pipe 402, the liquid outlet of the water inlet pipe 402 is connected to the inside of the water inlet chamber 408, the liquid inlet of the water inlet pipe 402 is outside the box 101, and is connected to the external condensed water. A drain pipe 403 is installed at the bottom of the drainage chamber 409 in the third separation chamber 401, and the liquid inlet of the discharge pipe is connected to the inside of the drainage chamber 409. The liquid outlet of the discharge pipe is outside the box 101, so as to facilitate the discharge of the condensed water in the drainage chamber 409. A condensation pipe 407 is installed in the condensation chamber 410, so that The exhaust gas entering the condensation chamber 410 exchanges heat with the condensation pipe 407 to condense and liquefy the impurities in the exhaust gas, thereby realizing the third recovery of the exhaust gas; the condensation pipe 407 passes through the partition in the third separation chamber 401, so that the liquid inlet and the liquid outlet of the condensation pipe 407 are connected to the water inlet chamber 408 and the drainage chamber 409 respectively, so that the condensed water in the water inlet chamber 408 enters the condensation pipe 407, and flows into the drainage chamber 409 after the heat exchange between the condensation pipe 407 and the exhaust gas is completed. A return liquid pipe 404 is installed at the bottom of the separation chamber 401, and the liquid inlet of the return liquid pipe 404 is connected to the interior of the condensation chamber 410, and the liquid outlet of the return liquid pipe 404 is connected to the drain pipe 308, so as to facilitate the discharge of impurities condensed and liquefied in the condensation chamber 410. An air outlet pipe 405 is installed at the top right side of the third separation chamber 401, and the air inlet of the air outlet pipe 405 is connected to the condensation chamber 410, and the air outlet of the air outlet pipe 405 is outside the box 101, so as to facilitate the discharge of the waste gas after recovery.

[0032] A console 104 is provided on the box door 103 .

[0033] In this embodiment, a control console 104 is installed on the chamber door 103 to facilitate the control of the inlet and outlet of exhaust gas, the inflow and outflow of condensed water, and the inflow and outlet of absorption liquid.

[0034] Baffles 406 are evenly and staggeredly arranged in the condensation chamber 410 .

[0035] In this embodiment, baffles 406 are staggered and evenly installed in the condensing chamber 410 to lengthen the distance that the exhaust gas flows through the condensing chamber 410, thereby increasing the heat exchange time between the exhaust gas and the condensing tube 407 and further improving the recovery rate of the exhaust gas.

[0036] An observation window is provided on the front side of the second separation chamber 301 .

[0037] In this embodiment, an observation window is installed on the front side of the second separation chamber 301 to facilitate observation of the situation inside the second separation chamber 301 .

[0038] During use, the staff operates the control console 104 to allow the exhaust gas to enter the first separation chamber 203 from the first air inlet pipe 201. When the exhaust gas passes through the filter plate 204, the filter plate 204 filters and intercepts large particles of impurities in the exhaust gas. The exhaust gas treated by the first treatment box is injected into the absorption liquid in the second separation chamber 301 from the second air inlet pipe 302. When the exhaust gas flows in the second air inlet pipe 302, it drives the rotating fan 303 to rotate. The rotation of the rotating fan 303 drives the transmission shaft 304 to rotate. The rotation of the transmission shaft 304 drives the blades 305 to rotate, and the exhaust gas is discharged into the absorption liquid from the exhaust hole 306. In this process, the blades 305 outside the exhaust hole 306 "cut off" the exhaust gas, causing it to form fine small bubbles in the absorption liquid. The volatile compounds in the exhaust gas can be more efficiently dissolved in the absorption liquid. Thereby, the recovery rate of volatile compounds in the exhaust gas is improved, and after the absorption liquid is saturated, the electric valve 309 on the drain pipe 308 is controlled to open, and the saturated absorption liquid is discharged from the device. The gas treated with the absorption liquid leaves the second treatment box from the third air inlet pipe 310 and enters the condensation chamber 410 in the third separation chamber 401. The condensed water enters the water inlet chamber 408 from the water inlet pipe 402, and flows into the condenser 407 from the water inlet chamber 408. The exhaust gas in the condensation chamber 410 exchanges heat with the condenser 407, so that the impurities in the exhaust gas are condensed and liquefied, and are discharged into the drain pipe 308 through the return pipe 404, and discharged from the device together with the saturated absorption liquid in the second separation chamber 301. The condensed water that completes the heat exchange in the condenser 407 flows into the drainage chamber 409 and is discharged from the device through the drainage pipe 403.

[0039] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present invention may be modified or replaced by equivalents without departing from the spirit and scope of the technical solutions of the present invention, and all of these should be included in the scope of the claims of the present invention.

Claims

1. A waste gas recovery device for VOC treatment, characterized by: The invention comprises a box body (101), a supporting leg (102), a first processing box, a second processing box, a third processing box and a box door (103), wherein the supporting leg (102) is arranged at the bottom of the box body (101), the first processing box, the second processing box and the third processing box are arranged in sequence in the box body (101) for recovering waste gas, and the box door (103) is arranged on the box body (101); The second treatment box comprises a second separation chamber (301), a second air inlet pipe (302), a transmission shaft (304), a rotating fan (303), blades (305), an exhaust hole (306), a liquid inlet pipe (307), a liquid discharge pipe (308), an electric valve (309) and a third air inlet pipe (310). The second separation chamber (301) is arranged in the box body (101). The second separation chamber (301) is connected to the first treatment box through the second air inlet pipe (302). A sealing plate is provided at the bottom of the second air inlet pipe (302). The bottom of the second air inlet pipe (302) is submerged in the absorption liquid. The transmission shaft (304) is provided at the bottom of the second air inlet pipe (302). The bottom end of the second separation chamber (301) is connected to the outer absorption liquid through the liquid inlet pipe (307). The liquid discharge pipe (308) is provided at the bottom of the second separation chamber (301). The electric valve (309) is provided on the liquid inlet pipe (307) and the liquid discharge pipe (308). The third air inlet pipe (310) is provided on one side of the top of the second separation chamber (301).

2. The waste gas recovery device for VOC treatment according to claim 1, characterized in that: The first processing box includes a first separation chamber (203), a filter plate (204), a first air inlet pipe (201) and a switch door (202); the first separation chamber (203) is arranged on one side of the second separation chamber (301); the filter plate (204) is arranged in the first separation chamber (203); the first separation chamber (203) is connected to the external exhaust gas through the first air inlet pipe (201); the first separation chamber (203) is connected to the second separation chamber (301) through the second air inlet pipe (302); and the switch door (202) is arranged on the first separation chamber (203).

3. The waste gas recovery device for VOC treatment according to claim 2, characterized in that: The third treatment box includes a third separation chamber (401), a water inlet chamber (408), a condensation chamber (410), a drainage chamber (409), a condensation pipe (407), a water inlet pipe (402), a drainage pipe (403), a liquid return pipe (404) and an air outlet pipe (405). The third separation chamber (401) is arranged on a side of the second separation chamber (301) away from the first separation chamber (203). The water inlet chamber (408), the condensation chamber (410) and the drainage chamber (409) are arranged in sequence in the third separation chamber (401). The condensation pipe (407) is arranged in the condensation chamber (410). The liquid inlet and liquid outlet of the condensing pipe (407) are respectively connected to the water inlet chamber (408) and the drainage chamber (409); the water inlet pipe (402) is arranged at the top of the water inlet chamber (408) in the third separation chamber (401); the drainage pipe (403) is arranged at the bottom of the drainage chamber (409) in the third separation chamber (401); the condensing chamber (410) is connected to the drainage pipe (308) through the liquid return pipe (404); the air outlet pipe (405) is arranged at the top of one side of the third separation chamber (401); and the air outlet pipe (405) is connected to the condensing chamber (410).

4. The waste gas recovery device for VOC treatment according to claim 1, characterized in that: A console (104) is provided on the box door (103).

5. The waste gas recovery device for VOC treatment according to claim 3, characterized in that: Baffles (406) are evenly and staggeredly arranged in the condensation chamber (410).

6. The waste gas recovery device for VOC treatment according to claim 1, characterized in that: An observation window is provided on the front side of the second separation chamber (301).

Images