An exhaust gas treatment device and method

Abstract

The application discloses a kind of waste gas treatment device and method, wherein the waste gas treatment device includes box and is located at the box inner bottom surface box cover, baffle, the inside of the box cover is not communicated with the inside of box, the bottom of the box is provided with with the gas inlet that box cover inside is communicated, the top of the box is provided with exhaust window, the box cover, baffle is limited in the disinfection pool in box.There is beneficial effect: the waste gas treatment device of the application is oxidized and decomposed to VOC in waste gas by VOC oxidation equipment, waste gas is filtered before entering VOC oxidation equipment, remove solid particles such as smoke dust, and then the gas discharged by VOC oxidation equipment is disinfected, to avoid toxic gas pollution environment, so as to realize the treatment of a variety of waste gas, and small, easy to install, save the trouble of bulk purchase equipment, effectively reduce use cost.

Description

Technical Field

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

[0002] In some scenarios, the exhaust gas produced may contain a variety of different components. For example, fume hoods used in scientific experiments may produce different exhaust gases depending on the experiment, such as gases containing smoke and dust, VOCs, microbial aerosols, etc. The treatment methods for different exhaust gases often vary greatly. Therefore, when the exhaust gas contains a variety of different components, multiple exhaust gas treatment devices need to be set up.

[0003] Currently, the various exhaust gas treatment devices installed on the equipment are independent and do not overlap. This results in a very large volume of equipment with multiple devices combined, and the overall cost is also very high. Of course, the biggest headache is that installing multiple exhaust gas treatment devices together requires a large installation space. If the equipment cannot provide a sufficiently large installation space, the installation of multiple exhaust gas treatment devices becomes extremely difficult. For example, for fume hoods, exhaust gas treatment devices are generally installed on the top, but the top installation area of ​​a fume hood is already small, making it difficult to install multiple exhaust gas treatment devices. Therefore, currently, only one exhaust gas treatment device is typically installed on the top of a fume hood. The laboratory needs to purchase various fume hoods with different functions for different waste gas treatment devices, so that the laboratory personnel can choose the appropriate fume hood according to the different waste gases generated in the experiment. This not only requires the laboratory to spend a lot of money to purchase a large number of fume hoods, but also the subsequent maintenance of a large number of fume hoods is also a very large expense. At the same time, the installation of a large number of fume hoods also requires a large laboratory area. It can be seen that the volume of various waste gas treatment devices is very large, resulting in huge investment in the use, maintenance and supporting costs of the corresponding equipment. If a smaller waste gas treatment device can be designed that can handle various types of waste gases, it will effectively reduce the use, maintenance and supporting costs of the equipment with waste gas treatment devices installed. Summary of the Invention

[0004] The main objective of this invention is to propose a waste gas treatment device and method, which aims to solve the problems of current waste gas treatment devices that can treat multiple types of waste gases being large in size, inconvenient to install, and costly to use.

[0005] To solve the above problems, the present invention proposes an exhaust gas treatment device, including a box body and a cover and partition disposed on the bottom surface of the box body. The inside of the cover is not connected to the inside of the box body. The bottom of the box body is provided with an air inlet that communicates with the inside of the cover. The top of the box body is provided with an exhaust window. The cover and partition define a disinfection pool inside the box body.

[0006] The chamber contains an air inlet pipe, a VOC oxidation device, a heat insulation pipe, an exhaust pipe, and a long gas box arranged sequentially along the gas flow direction. The air inlet end of the air inlet pipe is connected to the inside of the chamber and is equipped with a filter screen. A fan is installed on the exhaust pipe to drive the gas to flow sequentially within the air inlet pipe, VOC oxidation device, heat insulation pipe, exhaust pipe, and long gas box. The bottom of the long gas box is connected to an air outlet pipe, and the air outlet end of the air outlet pipe extends into the ozone pure water in the disinfection pool.

[0007] In one embodiment, the air intake end of the air intake pipe is provided with multiple nozzles, which are located on both sides of the filter screen and can spray ozone-purified water onto both sides of the filter screen.

[0008] In one embodiment, a baffle is provided at the air inlet end of the air inlet pipe to prevent liquid flowing down the filter screen from flowing into the air inlet pipe.

[0009] In one embodiment, a liquid receiving funnel is provided inside the casing, which is located directly below the filter screen and is used to collect liquid dripping from the filter screen.

[0010] The liquid receiving hopper is connected to the inlet end of the sewage pipe, and the outlet end of the sewage pipe extends out of the box.

[0011] In one embodiment, the VOC oxidation device includes:

[0012] A heat insulation cylinder, the two ends of which are sealed by sealing plates, the sealing plates being sealed to the air inlet pipe and the heat insulation pipe;

[0013] There are multiple reaction tubes located inside the heat insulation cylinder, all of which are parallel to the heat insulation cylinder. The two ends of the reaction tubes extend from the two ends of the heat insulation cylinder and are connected to the air inlet pipe and the heat insulation pipe. The reaction tubes are sealed and connected to the sealing plate.

[0014] A catalyst plate is located inside the reaction tube and extends from one end of the reaction tube to the other.

[0015] An inductor coil, wound around the outside of a heat-insulating cylinder, is used to heat the reaction tube.

[0016] In one embodiment, a rotating shaft is coaxially mounted inside the reaction tube. One end of the rotating shaft extends into the air inlet pipe and is equipped with a fan. The gas flowing in the air inlet pipe can blow the fan and drive the rotating shaft to rotate.

[0017] The catalyst plate is fixedly connected to the rotating shaft, and there are multiple catalyst plates, which are centrally symmetrically distributed with the rotating shaft as the center.

[0018] The catalyst plate is a perforated flat plate with a length equal to that of the reaction tube. One end of its width is fixedly connected to the rotating shaft, and the other end is slidably connected to the inner wall of the reaction tube.

[0019] In one embodiment, a preheating water jacket is provided on the air inlet pipe, and a cooling water jacket is provided on the exhaust pipe. The water inlet end of the preheating water jacket and the water outlet end of the cooling water jacket are connected. The water outlet end of the preheating water jacket is connected to a water storage tank. A water pump is provided in the water storage tank. The water pump is connected to the water inlet end of the cooling water jacket. The water pump can draw cooling water from the water storage tank and send it to the cooling water jacket.

[0020] In one embodiment, the box is equipped with an ozone generator, a liquid storage tank, and a second water storage tank. The ozone generator and the second water storage tank are both connected to the liquid storage tank. The ozone gas generated by the ozone generator and the pure water in the second water storage tank come into full contact in the liquid storage tank to form ozone-pure water. The liquid storage tank is connected to a disinfection pool and a spray nozzle. The ozone-pure water in the liquid storage tank can flow into the disinfection pool and be sprayed out from the spray nozzle.

[0021] Furthermore, the present invention also proposes a waste gas treatment method, comprising:

[0022] The inductor coil is energized to heat the reaction tube;

[0023] Start the fan and inject exhaust gas into the intake chamber through the air inlet;

[0024] After the exhaust gas passes through the filter screen to remove dust particles, it enters the intake pipe. After the exhaust gas in the intake pipe enters the reaction pipe, the VOCs in the exhaust gas are oxidized and decomposed under the catalytic action of the catalytic plate. The decomposed gas is injected into the ozone pure water in the disinfection tank, and the exhaust gas is disinfected by the ozone pure water. The treated non-toxic gas is discharged from the exhaust window.

[0025] In one embodiment, the waste gas treatment method further includes:

[0026] After the exhaust gas treatment is completed, control the nozzle to spray ozone pure water onto the filter screen to clean and disinfect the filter screen;

[0027] Before each waste gas treatment operation, replace the ozone-pure water in the disinfection tank.

[0028] Beneficial effects: The waste gas treatment device of the present invention oxidizes and decomposes VOCs in waste gas through VOC oxidation equipment. Before entering the VOC oxidation equipment, the waste gas is filtered to remove solid particles such as smoke and dust. Then, the gas discharged from the VOC oxidation equipment is disinfected to avoid toxic gas pollution of the environment. This allows for the treatment of various waste gases. Moreover, it is small in size, easy to install, saves the trouble of purchasing large quantities of equipment, and effectively reduces the cost of use. Attached Figure Description

[0029] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. 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 creative effort.

[0030] Figure 1 This is a schematic diagram of the structure of a waste gas treatment device according to the present invention. Figure 1 ;

[0031] Figure 2 This is a schematic diagram of the structure of a waste gas treatment device according to the present invention. Figure 2 ;

[0032] Figure 3 This is the present invention. Figure 1 Top view after removing the cover plate;

[0033] Figure 4 yes Figure 2 AA section view in the middle;

[0034] Figure 5 This is a cross-sectional view of the VOC oxidation device of the present invention.

[0035] The annotations in the attached figures are explained as follows:

[0036] 1. Housing; 2. Cover; 3. Exhaust window; 4. Air inlet; 5. Drain pipe; 6. Control valve; 7. Drain pipe; 8. Cover; 9. Air inlet chamber; 10. Air inlet pipe; 11. Filter screen; 12. Mounting plate; 13. Nozzle; 14. Baffle; 15. Liquid receiving hopper; 17. Bracket; 19. Preheating water jacket; 20. VOC oxidation equipment; 201. Sealing plate; 202. Inductor coil; 203. Heat insulation cylinder; 2 04. Reaction tube; 205. Catalytic plate; 206. Rotating shaft; 207. Fan; 21. Heat insulation pipe; 22. Exhaust pipe; 23. Cooling water jacket; 24. Fan; 25. Long strip gas box; 26. Gas outlet pipe; 27. Disinfection pool; 28. Infusion pipe; 29. ​​Second water storage tank; 30. Water pump; 31. Liquid storage tank; 32. Ozone generator; 33. Gas transmission pipe; 34. Partition plate; 35. First water storage tank; 36. Shaft bracket. Detailed Implementation

[0037] 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 a part of the embodiments of the present invention, and not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0038] It should be noted that if the embodiments of the present invention involve directional indicators (such as up, down, left, right, front, back, etc.), the directional indicators are only used to explain the relative positional relationship and movement of the components in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicators will also change accordingly.

[0039] In this invention, unless otherwise explicitly specified and limited, the terms "connection," "fixed," etc., should be interpreted broadly. For example, "fixed" can mean a fixed connection, a detachable connection, or an integral part; it can mean a mechanical connection or an electrical connection; it can mean a direct connection or an indirect connection through an intermediate medium; it can mean the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0040] Furthermore, if the embodiments of this invention involve descriptions such as "first" or "second," these descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the meaning of "and / or" throughout the text includes three parallel solutions; for example, "A and / or B" includes solution A, solution B, or a solution where both A and B are satisfied simultaneously. Furthermore, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by this invention.

[0041] This invention proposes a waste gas treatment device that uses a VOC oxidation device 20 to oxidize and decompose VOCs in waste gas. Before entering the VOC oxidation device 20, the waste gas is filtered to remove solid particles such as smoke and dust. Then, the gas discharged from the VOC oxidation device 20 is disinfected to avoid toxic gas pollution of the environment. This allows for the treatment of various waste gases. Moreover, the device is small in size, easy to install, saves the trouble of purchasing large quantities of equipment, and effectively reduces operating costs.

[0042] Specifically, in one embodiment of the invention, such as Figure 1 and Figure 2 As shown, the exhaust gas treatment device includes a housing 1 and a cover plate 2 located on the upper end of the housing 1. An exhaust window 3 is provided on the cover plate 2, and an air inlet 4 is provided at the bottom of the housing 1.

[0043] In this embodiment, as Figure 3 and Figure 4As shown, a cover 8 and a partition 34 are provided on the bottom surface of the inner side of the box 1. The cover 8 isolates an air intake chamber 9 inside the box 1. The air intake chamber 9 is not connected to the inside of the box 1. The air inlet 4 is connected to the air intake chamber 9. With this design, the exhaust gas will not escape to the area outside the cover 8 inside the box 1 after entering the air intake chamber 9 through the air inlet 4, thus preventing exhaust gas leakage. The cover 8 and the partition 34 define a disinfection pool 27 inside the box 1. The disinfection pool 27 contains ozone-rich pure water, which is referred to as ozone pure water.

[0044] In this embodiment, as Figure 3 and Figure 4 As shown, the housing 1 is sequentially connected with an air inlet pipe 10, a VOC oxidation device 20, a heat insulation pipe 21, an exhaust pipe 22, and a long strip gas box 25 along the gas flow direction. The air inlet end of the air inlet pipe 10 is connected to the air inlet chamber 9 and is equipped with a filter screen 11. The filter screen 11 filters the dust particles in the exhaust gas entering the air inlet pipe 10 from the air inlet chamber 9. The exhaust gas enters the air inlet chamber 9 through the air inlet 4.

[0045] In this embodiment, as Figure 3 and Figure 4 As shown, a fan 24 is installed on the exhaust pipe 22. After the fan 24 is started, it draws the exhaust gas into the intake chamber 9 through the air inlet 4. Then, the exhaust gas is filtered through the filter screen 11 and enters the intake pipe 10. It then flows sequentially through the VOC oxidation device 20, the heat insulation pipe 21, the exhaust pipe 22, and the long strip gas box 25. Finally, it is discharged from the exhaust pipe 26 connected to the bottom of the long strip gas box 25. The exhaust end of the exhaust pipe 26 extends into the ozone pure water in the disinfection pool 27. The gas discharged from the exhaust pipe 26 enters the ozone pure water and is disinfected and sterilized. Finally, the gas escaping from the ozone pure water is non-toxic, effectively protecting the environment.

[0046] After applying the exhaust gas treatment device of this embodiment to the fume hood, the fan 24 starts to draw exhaust gas into the inlet pipe 10. The gas containing soot in the exhaust gas is filtered down by the filter screen 11, the VOC in the exhaust gas is oxidized and decomposed by the VOC oxidation device 20, and the microbial aerosol in the exhaust gas is disinfected by ozone and pure water, thus realizing the treatment of multiple exhaust gases. Traditional multiple exhaust gas treatment devices are often installed together, and each exhaust gas treatment device works independently without affecting each other. Not only is the overall volume very large, but the cost is also very high. The exhaust gas treatment device of this embodiment integrates multiple exhaust gas treatment functions. In particular, it uses the VOC oxidation device 20 to oxidize and decompose VOCs instead of conventional treatment methods such as molecular sieves and activated carbon. The VOC oxidation device 20 has low airflow resistance and does not affect the overall treatment efficiency of the exhaust gas treatment device, so that the filter screen 11 can still filter exhaust gas efficiently, and the fan 24 operates with low noise.

[0047] This embodiment integrates multiple waste gas treatment modules into the waste gas flow path inside the housing 1. The various waste gas treatment modules cooperate and influence each other to jointly purify the waste gas. The processing speed is fast and the efficiency is high. Compared with the current waste gas treatment devices with multiple waste gas treatment capabilities, the volume is greatly reduced, which is very convenient for installation. For fume hoods, the laboratory is also spared the trouble of purchasing a large number of fume hoods, reducing the cost of use, maintenance and supporting costs.

[0048] In this embodiment, as Figure 3 As shown, the air inlet pipe 10 is equipped with multiple nozzles 13 at its air inlet end. These nozzles 13 are located in the air inlet chamber 9 and are positioned on both sides of the filter screen 11. This design allows the multiple nozzles 13 to spray ozone-pure water onto both sides of the filter screen 11, thus thoroughly cleaning and disinfecting the filter screen 11 with good cleaning and disinfection effects. Furthermore, to facilitate the installation of the nozzles 13, such as... Figure 3 As shown, the air inlet end of the air inlet pipe 10 is provided with a mounting plate 12, and the nozzle 13 is mounted on the mounting plate 12.

[0049] Furthermore, such as Figure 3 As shown, the air inlet end of the air inlet pipe 10 is provided with a baffle 14. The baffle 14 is used to prevent the liquid flowing down from the filter screen 11 from flowing into the air inlet pipe 10 and the VOC oxidation device 20 and affecting the operation of the VOC oxidation device 20.

[0050] In this embodiment, as Figure 3 As shown, a liquid receiving hopper 15 is provided inside the housing 8. The liquid receiving hopper 15 is fixedly connected to the housing 1 via a bracket 17. The liquid receiving hopper 15 is located directly below the filter screen 11 and is used to collect the liquid dripping from the filter screen 11 to prevent the liquid from flowing out from the air inlet 4. The liquid receiving hopper 15 is connected to the liquid inlet end of the drain pipe 5. The liquid outlet end of the drain pipe 5 extends out of the housing 1, and the liquid dripping from the filter screen 11 is discharged from the drain pipe 5. A control valve 6 is also provided on the drain pipe 5 to control the opening and closing of the drain pipe 5 to prevent exhaust gas from escaping through the drain pipe 5 and polluting the environment. Therefore, it is necessary to use the control valve 6 to ensure that a certain amount of liquid is always kept in the drain pipe 5 to block the drain pipe 5 and prevent exhaust gas from escaping through the drain pipe 5 and polluting the environment.

[0051] In this embodiment, as Figure 3 and Figure 5As shown, the VOC oxidation device 20 includes: a heat insulation cylinder 203, a reaction tube 204, a catalyst plate 205, and an inductor coil 202. Both ends of the heat insulation cylinder 203 are sealed by a sealing plate 201, and the sealing plate 201 is used to detachably and sealedly connect it to the inlet pipe 10 and the heat insulation pipe 21. Multiple reaction tubes 204 are located inside the heat insulation cylinder 203 and are all parallel to the heat insulation cylinder 203. Both ends of the reaction tubes 204 extend from both ends of the heat insulation cylinder 203 through the sealing plate 201 and communicate with the inlet pipe 10 and the heat insulation pipe 21. The reaction tubes 204 are sealed through the sealing plate 201. The catalyst plate 205 is fixed inside the reaction tube 204 and extends from the reaction tube 204. One end of 4 extends to the other end; the inductor coil 202 is wound around the heat insulation cylinder 203. After the inductor coil 202 is energized, it heats the reaction tube 204 by means of electromagnetic induction and eddy current, so that the VOC is heated to the oxidation reaction temperature. In this way, after the exhaust gas enters each reaction tube 204 through the inlet pipe 10, the VOC in the exhaust gas is heated to the oxidation reaction temperature, and then oxidized and decomposed under the catalytic action of the catalyst plate 205. Compared with conventional treatment methods such as molecular sieves and activated carbon, this VOC treatment method has less airflow resistance and does not drag down the overall treatment efficiency of the exhaust gas treatment device, so that the filter screen 11 can still filter the exhaust gas efficiently, and the fan 24 has low operating noise.

[0052] In this embodiment, the catalytic plate 205 is made of a catalyst, which can catalyze the oxidation and decomposition reaction of VOCs.

[0053] Furthermore, to improve the efficiency of VOC oxidation and decomposition, such as... Figure 5 As shown, a rotating shaft 206 is coaxially mounted inside the reaction tube 204 via a shaft bracket 36. One end of the rotating shaft 206 extends into the air intake pipe 10 and is equipped with a fan 207. The gas flowing in the air intake pipe 10 blows the fan 207, causing the rotating shaft 206 to rotate. The catalyst plate 205 is fixedly connected to the rotating shaft 206. There are multiple catalyst plates 205, which are centrally symmetrically distributed with the rotating shaft 206 as the center. The catalyst plate 205 is a perforated plate with a length equal to that of the reaction tube 204. One end of its width is fixedly connected to the rotating shaft 206, and the other end is slidably connected to the inner wall of the reaction tube 204. The rotation of the rotating shaft 206 drives the multiple catalyst plates 205 to rotate synchronously. The exhaust gas passes through the perforations of the catalyst plate 205. This design allows the catalyst plate 205 to fully contact VOCs, improving the VOC oxidation and decomposition efficiency.

[0054] In this embodiment, as Figure 3As shown, a preheating water jacket 19 is provided on the air inlet pipe 10. The preheating water jacket 19 is used to preheat the exhaust gas in the air inlet pipe 10 to reduce the energy consumption of the VOC oxidation equipment 20. A cooling water jacket 23 is provided on the exhaust pipe 22. The cooling water jacket 23 is used to cool the gas in the exhaust pipe 22 and absorb heat to send to the preheating water jacket 19 to preheat the exhaust gas. On the one hand, it makes full use of thermal energy, reduces the cost of exhaust gas treatment, and saves energy and protects the environment. On the other hand, it avoids the gas temperature injected into the disinfection tank 27 from being too high and destroying the ozone pure water, causing the ozone in the pure water to decompose and lose its sterilization and disinfection effect.

[0055] In this embodiment, as Figure 3 As shown, the inlet end of the preheating water jacket 19 and the outlet end of the cooling water jacket 23 are connected by a liquid delivery pipe 28, and the outlet end of the preheating water jacket 19 is connected to a water storage tank 35. Figure 4 As shown, the water storage tank 35 is equipped with a water pump 30, which is connected to the inlet of the cooling water jacket 23. After the water pump 30 is started, it can draw cooling water from the water storage tank 35 and send it to the cooling water jacket 23. After the cooling water jacket 23 absorbs enough heat, it enters the preheating water jacket 19 through the liquid delivery pipe 28 to release heat and heat the exhaust gas in the air intake pipe 10. The cooled water with the reduced temperature flows out from the preheating water jacket 19 and returns to the water storage tank 35, thereby realizing the recycling of cooling water, saving energy and protecting the environment, and helping to reduce costs and increase efficiency.

[0056] In this embodiment, as Figure 4 As shown, the housing 1 is equipped with an ozone generator 32, a liquid storage tank 31, and a second water storage tank 29. The ozone generator 32 and the second water storage tank 29 are both connected to the liquid storage tank 31. The ozone gas generated by the ozone generator 32 and the pure water in the second water storage tank 29 come into full contact in the liquid storage tank 31 to form ozone-pure water. Specifically, after the ozone generator 32 is started, the ozone gas it generates is injected into the liquid storage tank 31 through the gas supply pipe 33. At the same time, the pure water in the second water storage tank 29 is also injected into the liquid storage tank 31. The pure water in the liquid storage tank 31 absorbs the ozone to form ozone-pure water.

[0057] In this embodiment, the storage tank 31 is connected to the disinfection pool 27 and the spray nozzle 13. The ozone-pure water in the storage tank 31 can flow into the disinfection pool 27 and be sprayed out from the spray nozzle 13, such as... Figures 1-4 As shown, the disinfection pool 27 is connected to a drain pipe 7, and a control valve 6 is installed on the drain pipe 7. When the liquid in the disinfection pool 27 needs to be replaced, the control valve 6 is opened to drain the liquid in the disinfection pool 27, and then the new ozone pure water in the storage tank 31 is injected into the disinfection pool 27.

[0058] In this embodiment, a delivery pump is installed on the pipeline connecting the storage tank 31 to the nozzle 13. The delivery pump draws ozone-pure water from the storage tank 31 and sends it to the nozzle 13, from which it is sprayed out.

[0059] Furthermore, a liquid level sensor is installed on the liquid storage tank 31. When the liquid level in the liquid storage tank 31 is lower than the set value, the ozone generator 32 is activated, and the pure water in the second water storage tank 29 is also injected into the liquid storage tank 31 simultaneously, so as to replenish the liquid storage tank 31 with ozone pure water in a timely manner.

[0060] Furthermore, the present invention also proposes a waste gas treatment method, comprising:

[0061] S1. Energize the inductor coil 202 to heat the reaction tube 204;

[0062] S2. Start the fan 24 and draw exhaust gas into the intake chamber 9 through the air inlet 4;

[0063] S3. After the exhaust gas passes through the filter screen 11 to remove dust particles, it enters the intake pipe 10. After the exhaust gas in the intake pipe 10 enters the reaction pipe 204, the VOC in the exhaust gas is heated and oxidized and decomposed under the catalytic action of the catalyst plate 205. After the decomposed gas is cooled, it is injected into the ozone pure water in the disinfection tank 27. The ozone pure water disinfects the exhaust gas. The treated non-toxic gas leaves the disinfection tank 27 from the ozone pure water and is discharged from the exhaust window 3.

[0064] In this embodiment, the waste gas treatment method further includes:

[0065] S4. After the exhaust gas treatment operation is completed, control nozzle 13 to spray ozone pure water onto filter screen 11 to clean and disinfect filter screen 11 for the next use.

[0066] In this embodiment, the waste gas treatment method further includes:

[0067] S0. Before each waste gas treatment operation, replace the ozone pure water in the disinfection tank 27, and then start the inductor coil 202 to heat the reaction tube 204. Alternatively, the ozone pure water in the disinfection tank 27 can be drained after each waste gas treatment operation, and then new ozone pure water can be added to the disinfection tank 27 before each waste gas treatment operation to ensure the disinfection effect of the waste gas.

[0068] The above description is merely a preferred embodiment of the present invention and does not limit the patent scope of the present invention. Any equivalent structural transformations made using the contents of the present invention's specification and drawings under the inventive concept of the present invention, or direct / indirect applications in other related technical fields, are included within the patent protection scope of the present invention.

Claims

1. A waste gas treatment device, characterized in that, It includes a box body and a cover and partitions located on the bottom surface of the box body. The inside of the cover is not connected to the inside of the box body. The bottom of the box body is provided with an air inlet that communicates with the inside of the cover. The top of the box body is provided with an exhaust window. The cover and partitions define a disinfection pool inside the box body. The chamber contains an air inlet pipe, a VOC oxidation device, a heat insulation pipe, an exhaust pipe, and a long gas box arranged sequentially along the gas flow direction. The air inlet end of the air inlet pipe is connected to the inside of the chamber and is equipped with a filter screen. A fan is installed on the exhaust pipe to drive the gas to flow sequentially within the air inlet pipe, VOC oxidation device, heat insulation pipe, exhaust pipe, and long gas box. The bottom of the long gas box is connected to an air outlet pipe, and the air outlet end of the air outlet pipe extends into the ozone pure water in the disinfection pool.

2. The waste gas treatment device as described in claim 1, characterized in that, The air intake end of the air intake pipe is equipped with multiple nozzles, which are located on both sides of the filter screen. The multiple nozzles can spray ozone-purified water onto both sides of the filter screen.

3. The waste gas treatment device as described in claim 2, characterized in that, The air intake end of the air intake pipe is equipped with a baffle to prevent liquid flowing down the filter screen from flowing into the air intake pipe.

4. The waste gas treatment device as described in claim 2, characterized in that, The box is equipped with a liquid receiving funnel located directly below the filter screen, which is used to collect liquid dripping from the filter screen. The liquid receiving hopper is connected to the inlet end of the sewage pipe, and the outlet end of the sewage pipe extends out of the box.

5. The waste gas treatment device as described in claim 1, characterized in that, The VOC oxidation equipment includes: A heat insulation cylinder, the two ends of which are sealed by sealing plates, the sealing plates being sealed to the air inlet pipe and the heat insulation pipe; There are multiple reaction tubes located inside the heat insulation cylinder, all of which are parallel to the heat insulation cylinder. The two ends of the reaction tubes extend from the two ends of the heat insulation cylinder and are connected to the air inlet pipe and the heat insulation pipe. The reaction tubes are sealed and connected to the sealing plate. A catalyst plate is located inside the reaction tube and extends from one end of the reaction tube to the other. An inductor coil, wound around the outside of a heat-insulating cylinder, is used to heat the reaction tube.

6. The waste gas treatment device as described in claim 5, characterized in that, A rotating shaft is coaxially mounted inside the reaction tube. One end of the rotating shaft extends into the air inlet pipe and is equipped with a fan. The gas flowing in the air inlet pipe can blow the fan and drive the rotating shaft to rotate. The catalyst plate is fixedly connected to the rotating shaft, and there are multiple catalyst plates, which are centrally symmetrically distributed with the rotating shaft as the center. The catalyst plate is a perforated flat plate with a length equal to that of the reaction tube. One end of its width is fixedly connected to the rotating shaft, and the other end is slidably connected to the inner wall of the reaction tube.

7. The waste gas treatment device as described in claim 1, characterized in that, A preheating water jacket is installed on the air intake pipe, and a cooling water jacket is installed on the exhaust pipe. The water inlet end of the preheating water jacket and the water outlet end of the cooling water jacket are connected. The water outlet end of the preheating water jacket is connected to a water storage tank. A water pump is installed in the water storage tank. The water pump is connected to the water inlet end of the cooling water jacket. The water pump can draw cooling water from the water storage tank and send it to the cooling water jacket.

8. The waste gas treatment device as described in claim 2, characterized in that, The box contains an ozone generator, a liquid storage tank, and a second water storage tank. The ozone generator and the second water storage tank are both connected to the liquid storage tank. The ozone gas generated by the ozone generator and the pure water in the second water storage tank come into full contact in the liquid storage tank to form ozone-pure water. The liquid storage tank is connected to the disinfection pool and the spray nozzle. The ozone-pure water in the liquid storage tank can flow into the disinfection pool and be sprayed out from the spray nozzle.

9. A method for treating waste gas, applied to the waste gas treatment apparatus of any one of claims 1-8, characterized in that, include: The inductor coil is energized to heat the reaction tube; Start the fan and inject exhaust gas into the intake chamber through the air inlet; After the exhaust gas passes through the filter screen to remove dust particles, it enters the intake pipe. After the exhaust gas in the intake pipe enters the reaction pipe, the VOCs in the exhaust gas are oxidized and decomposed under the catalytic action of the catalytic plate. The decomposed gas is injected into the ozone pure water in the disinfection tank, and the exhaust gas is disinfected by the ozone pure water. The treated non-toxic gas is discharged from the exhaust window.

10. The waste gas treatment method as described in claim 9, characterized in that, Also includes: After the exhaust gas treatment is completed, control the nozzle to spray ozone pure water onto the filter screen to clean and disinfect the filter screen; Before each waste gas treatment operation, replace the ozone-pure water in the disinfection tank.

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