An exhaust gas purification apparatus

Abstract

The utility model discloses a waste gas purification equipment relates to waste gas purification technical field. Waste gas purification equipment includes casing and install in the casing's perforated plate and partition net, the inside of casing is equipped with the air inlet channel, and the casing is set up with the air inlet channel intercommunication's air inlet, the outside of perforated plate is along the circumferential and is equipped in the air inlet channel, and the lower part between perforated plate and casing forms the absorption cavity, and the waste gas delivery port of air inlet channel communicates with absorption cavity, and absorption cavity is used for containing absorption liquid, the top of air inlet channel is installed with partition net, and the middle part between partition net, perforated plate, air inlet channel and casing forms the bubble accumulation cavity, and the upper part between partition net and casing forms the separation recovery cavity, and is equipped with the water vapor removal mechanism in separation recovery cavity, and the casing is set up with the clean gas outlet intercommunication's of separation recovery cavity. The utility model discloses a waste gas purification equipment can prolong gas-liquid two phase contact time and make gas and absorption liquid effective contact to improve the absorption rate of harmful gas and purification effect.

Description

Technical Field

[0001] This utility model relates to the field of waste gas purification technology, and in particular to a waste gas purification device. Background Technology

[0002] In industrial production, agricultural planting, and household life, waste gases containing volatile organic compounds (VOCs) or harmful gases with foul odors are often generated. These waste gases may contain styrene, ammonia, hydrogen sulfide, methanethiol, dimethyl sulfide, or trimethylamine. If these waste gases containing VOCs and odorous substances are discharged directly without effective treatment, they will not only damage the atmospheric environment and cause environmental problems such as smog and photochemical smog, but also harm human health through inhalation and skin contact.

[0003] Currently, spray absorption towers are mainly used to purify waste gas. Existing spray absorption towers typically have an inlet at the bottom and an outlet at the top, with a spraying device inside. During waste gas purification, the waste gas enters the spray absorption tower through the inlet and flows upwards. The absorbent liquid is atomized and sprayed out by the spraying device. The tiny droplets formed by the sprayed absorbent liquid move downwards and contact the waste gas, thereby absorbing VOCs and odorous substances, achieving the effect of waste gas purification. However, using spray absorption towers for waste gas purification has limitations. Issues such as insufficient gas-liquid two-phase contact time and uneven airflow distribution may prevent some waste gas from effectively contacting the absorbent liquid, making it difficult to effectively absorb harmful substances and resulting in substandard waste gas treatment. Utility Model Content

[0004] In view of the shortcomings of the prior art, the purpose of this utility model is to propose a waste gas purification device that can prolong the gas-liquid two-phase contact time and enable effective contact between the gas and the absorbent liquid, thereby improving the absorption rate and purification effect of harmful gases.

[0005] To solve the above-mentioned technical problems, this utility model provides a waste gas purification device, including a housing and a perforated plate and a partition mesh installed inside the housing;

[0006] The housing has an air intake channel inside, and an air intake port communicating with the air intake channel is opened on the side wall of the housing;

[0007] The perforated plate is arranged circumferentially around the outside of the air inlet channel, and an absorption cavity is formed between the perforated plate and the lower part of the shell. The exhaust gas outlet of the air inlet channel is connected to the absorption cavity. The absorption cavity is used to hold the absorbent liquid. The exhaust gas to be treated is initially absorbed by the absorbent liquid in the absorption cavity to obtain the initially purified gas.

[0008] The separator is installed above the air intake channel. A bubble accumulation cavity is formed between the separator, the perforated plate, the outer wall of the air intake channel and the middle part of the housing. The bottom of the bubble accumulation cavity is connected to the absorption cavity through the perforated plate. The pre-purified gas passes through the perforated plate to form bubbles. The bubble walls absorb the residual harmful gases in the pre-purified gas again to obtain clean gas.

[0009] A separation and recovery chamber is formed between the separator and the upper part of the shell. The top of the bubble accumulation chamber is connected to the separation and recovery chamber through the separator. A water vapor removal mechanism is provided in the separation and recovery chamber to remove water vapor from the clean air. The shell has a clean gas outlet that is connected to the separation and recovery chamber.

[0010] As an improvement to the above technical solution, the air intake channel includes an air intake section arranged in a horizontal direction and a transition section arranged in a vertical direction. The transition section is located below the air intake section and communicates with the air intake section. The air intake section is connected to the air inlet. The exhaust gas outlet is provided on the side of the transition section that communicates with the absorption chamber.

[0011] As an improvement to the above technical solution, the porous plate is provided with vents penetrating its opposite sides, and the cross-sectional area of ​​the vents gradually decreases from the inlet end to the outlet end of the vents; the inner wall of the vents has a spiral structure.

[0012] As an improvement to the above technical solution, the porosity of the porous plate is 25% to 50%.

[0013] As an improvement to the above technical solution, the vent is frustum-shaped, and the diameter of the vent gradually decreases from the inlet end to the outlet end.

[0014] The ratio of the diameter of the outlet end of the vent to the diameter of the inlet end of the vent is 1:1.2 to 1:3.

[0015] As an improvement to the above technical solution, the ratio of the diameter of the inlet end of the air hole to the depth of the air hole is 1:1 to 1:10.

[0016] As an improvement to the above technical solution, the diameter of the outlet end of the air hole is 0.1mm to 3mm, and the depth of the air hole is 0.15mm to 30mm.

[0017] As an improvement to the above technical solution, the separation and recovery chamber is filled with multiple hollow sphere packings, and the multiple hollow sphere packings together constitute a water vapor removal mechanism.

[0018] As an improvement to the above technical solution, the exhaust gas purification equipment further includes a replenishing water tank and a circulation pump. Both the replenishing water tank and the circulation pump are installed outside the housing. The replenishing water tank is connected to the absorption chamber. The input end of the circulation pump is connected to the replenishing water tank, and the output end of the circulation pump is located above the perforated plate.

[0019] As an improvement to the above technical solution, the clean gas outlet is equipped with a concentration detection device, which is used to detect the residual concentration of malodorous components in the clean gas.

[0020] Implementing this utility model has the following beneficial effects:

[0021] Through a rational structural design, the waste gas purification equipment utilizes direct liquid-phase absorption and secondary absorption at the bubble absorption interface to ensure effective and sufficient contact between the waste gas and the absorbent liquid. Furthermore, the bubbles undergo accumulation and rising within the bubble accumulation chamber. Compared to the brief contact between droplets and waste gas in traditional spray absorption towers, this significantly extends the contact time between the gas and liquid phases. This allows the absorption interface formed by the bubble walls ample time to absorb harmful gases such as VOCs and odorous substances from the waste gas, significantly improving the absorption efficiency of harmful gases and thus enhancing the waste gas purification effect. This solves the problem of low absorption efficiency of harmful gases in existing spray absorption towers due to short gas-liquid phase contact time and the presence of some waste gas failing to effectively contact the absorbent liquid. Attached Figure Description

[0022] Figure 1 This is a cross-sectional structural schematic diagram of the waste gas purification device in one embodiment of the present invention;

[0023] Figure 2 yes Figure 1 A cross-sectional schematic diagram of the exhaust gas purification equipment shown in another direction;

[0024] Figure 3 yes Figure 1 The diagram shows the structure of the perforated plate in the waste gas purification equipment.

[0025] Figure 4 yes Figure 3 A partial cross-sectional schematic diagram of the perforated plate shown;

[0026] in, Figure 1 and Figure 2 The blue arrows indicate the direction of gas flow within the exhaust gas purification equipment. Figure 1 The green arrows indicate the direction of the circulating flow of the absorbent liquid;

[0027] In the diagram: 1. Shell; 2. Perforated plate; 3. Separator; 4. Water vapor removal mechanism; 5. Liquid replenishment tank; 6. Absorbent liquid; 7. Circulating pump; 11. Air inlet; 12. Air inlet; 13. Absorption chamber; 14. Bubble accumulation chamber; 15. Separation and recovery chamber; 16. Clean gas outlet; 17. Concentration detection device; 111. Air inlet section; 112. Transition section; 112. Waste gas outlet; 21. Air hole; 211. Inner spiral; 41. Hollow sphere packing. Detailed Implementation

[0028] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail 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 provide a more thorough and complete understanding of the disclosure of this utility model.

[0029] In the description of this utility model, it should be understood that the terms "upper", "lower", "left", "right", "top", "bottom", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0030] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation" and "connection" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0031] like Figures 1 to 4 As shown, this embodiment provides a waste gas purification device, including a housing 1 and a perforated plate 2 and a partition mesh 3 installed inside the housing 1;

[0032] The housing 1 has an air intake channel 11 inside, and the side wall of the housing 1 has an air intake port 12 that communicates with the air intake channel 11.

[0033] The porous plate 2 is arranged circumferentially around the outside of the air inlet channel 11, and an absorption cavity 13 is formed between the porous plate 2 and the lower part of the shell. The exhaust gas outlet 1121 of the air inlet channel 11 is connected to the absorption cavity 13. The absorption cavity 13 is used to hold the absorbent liquid 6. The exhaust gas to be treated is initially absorbed by the absorbent liquid 6 in the absorption cavity 13 to obtain the initially purified gas.

[0034] The separator 3 is installed above the air intake channel 11. A bubble accumulation cavity 14 is formed between the separator 3, the perforated plate 2, the outer wall of the air intake channel 11, and the middle part of the housing 1. The bottom of the bubble accumulation cavity 14 is connected to the absorption cavity 13 through the perforated plate 2. The pre-purified gas passes through the perforated plate 2 to form bubbles. The bubbles accumulate in the bubble accumulation cavity 14 to form a bubble layer. The bubble walls absorb the residual harmful gases in the pre-purified gas again to obtain clean gas.

[0035] A separation and recovery chamber 15 is formed between the partition net 3 and the upper part of the housing 1. The top of the bubble accumulation chamber 14 is connected to the separation and recovery chamber 15 through the partition net 3. A water vapor removal mechanism 4 is provided in the separation and recovery chamber 15. The water vapor removal mechanism 4 is used to remove water vapor from the clean air. The housing 1 has a clean gas outlet 16 that is connected to the separation and recovery chamber 15.

[0036] When using a waste gas purification device to purify waste gas, firstly, absorbent liquid is introduced into the absorption chamber 13, preferably submerging the upper surface of the porous plate 2. Specifically, the upper surface of the porous plate can be flush with the liquid level of the absorbent liquid, or the liquid level of the absorbent liquid can be 0.5mm to 10mm higher than the upper surface of the porous plate. Due to the structural design of the waste gas purification device, the waste gas to be treated enters the intake channel 11 through the inlet 12 and enters the absorption chamber 13 through the waste gas outlet 1121 of the intake channel 11. Since the absorption chamber 13 contains absorbent liquid 6, the waste gas to be treated first comes into contact with the absorbent liquid 6 in the absorption chamber 13. The absorbent liquid 6 in the absorption chamber 13 can absorb most of the harmful gases in the waste gas to be treated, dissolving most of the harmful gases in the absorbent liquid, achieving a preliminary purification effect and laying the foundation for subsequent deep purification. Based on the porous plate 2 surrounding the air inlet channel 11 circumferentially, the initially purified gas in the absorption chamber 13 moves through the porous plate 2 towards the bubble accumulation chamber 14. Due to the porous plate 2, it disperses the gas. When the initially purified gas passes through the porous plate, it is divided into tiny gas clusters, which violently cut the absorbent liquid as they exit the porous plate 2. The absorbent liquid disperses on the surface of these tiny gas clusters, forming a liquid film that encapsulates the gas clusters, thus forming small bubbles. The bubbles accumulate in the bubble accumulation chamber 14 to form a bubble layer. The bubble wall of each bubble becomes an independent absorption interface, forming multiple absorption interfaces within the bubble layer. Through these interfaces, residual harmful components in the initially purified gas can be further absorbed. As the bubbles continuously accumulate upwards, the pressure decreases, the bubbles expand, and the bubble walls become thinner, eventually causing the upper bubbles to burst. During the formation, expansion, and collapse of thousands of tiny bubbles, the gas comes into full contact with, dissolves, and mixes with the absorbent liquid (bubble walls). Absorbable, reactive, and soluble harmful components within the gas are fully dissolved and absorbed, leaving only non-reactive and non-absorbable clean air to continue rising. This step significantly increases the gas-liquid contact area due to the formation of the absorption interface, ensuring sufficient and effective contact between the gas and absorbent liquid. Furthermore, the extended contact time between the gas and absorbent liquid allows for the thorough removal of any remaining harmful components from the initially purified gas.

[0037] This waste gas purification equipment, through a reasonable structural design, utilizes direct liquid-phase absorption and secondary absorption at the bubble absorption interface to ensure effective and sufficient contact between waste gas and the absorbent liquid. Furthermore, the bubbles undergo a certain accumulation and rising process within the bubble accumulation chamber 14. Compared to the brief contact between droplets and waste gas in traditional spray absorption towers, this significantly extends the contact time between the gas and liquid phases. This allows the absorption interface formed by the bubble walls ample time to absorb harmful gases such as VOCs and odorous substances from the waste gas, significantly improving the absorption efficiency of harmful gases and thus significantly enhancing the waste gas purification effect. This solves the problem of low absorption efficiency of harmful gases in existing spray absorption towers due to short gas-liquid phase contact time and the presence of some waste gas failing to effectively contact the absorbent liquid.

[0038] Specifically, the absorbent can be an existing absorbent capable of absorbing volatile organic pollutants and odor molecules. In some embodiments, to facilitate bubble formation and prolong bubble retention time, a commercially available absorbent containing a foaming agent or surfactant can be used.

[0039] In one embodiment, the absorbent liquid comprises, by mass percentage, 0.5%–15% nonionic surfactant, 0.1%–17% anionic surfactant, and the balance water. This composition effectively absorbs volatile organic pollutants and odor molecules while also providing excellent foaming properties. In some embodiments, the nonionic surfactant includes one or more of fatty alcohol polyoxypropylene ethers, polyethylene glycol nonionic surfactants, and polyethylene glycol ethers; the anionic surfactant includes one or more of sodium dodecyl sulfate, sodium dodecyl sulfonate, and sodium fatty alcohol polyoxyethylene ether sulfate.

[0040] In some alternative embodiments, the absorbent comprises, by mass percentage, 0.1% to 6% sodium dodecyl sulfate, 0.3% to 5% fatty alcohol polyoxypropylene ether, 0% to 5% sodium dodecyl sulfonate, 0.1% to 5% polyethylene glycol ether, 0.1% to 5% polyethylene glycol nonionic surfactant, and 0% to 6% sodium fatty alcohol polyoxyethylene ether sulfate, with the balance being water.

[0041] In one embodiment, the air intake channel 11 includes an air intake section 111 arranged in a horizontal direction and a transition section 112 arranged in a vertical direction. The transition section 112 is located below the air intake section 111 and communicates with the air intake section 111. The air intake section 111 is connected to the air inlet 12. The exhaust gas outlet 1121 is provided on the side of the transition section 112 that communicates with the absorption chamber 13.

[0042] Since most harmful gases such as VOCs and malodorous substances are molecules with molecular weights larger than air, they can easily pass through the transition section 112 and enter the absorbent liquid located below it, according to the principle of inertia. Furthermore, when the gas to be treated enters from the inlet section 111, because the inlet section 111 is horizontally positioned, as the gas moves to the side of the inlet section 111 away from the inlet 12, it will rotate 180° due to the obstruction of the side wall of the inlet section 111 and collide with the newly entered gas. This facilitates the movement of the gas towards the transition section 112, and thus into the absorbent liquid.

[0043] In one embodiment, the porous plate 2 is provided with vents 21 penetrating its opposite sides. From the inlet end of the vent 21 to the outlet end of the vent 21, the cross-sectional area of ​​the vent 21 gradually decreases. In this embodiment, the inlet end of the vent 21 is the side closer to the absorption chamber 13, and the outlet end of the vent 21 is the side closer to the bubble accumulation chamber 14.

[0044] The inner wall of the vent 21 has a spiral structure, that is, the inner wall of the vent 21 is provided with an inner spiral 211.

[0045] Due to the structural design of the vents 21, the interior of the vents 21 forms a variable spiral air passage. When the initially purified gas passes through the vents 21 of the porous plate, it generates a vortex. As the cross-sectional area of ​​the vents 21 gradually decreases from its inlet end to its outlet end, the speed of the gas vortex increases. Finally, when it rushes out of the porous plate 2, it violently cuts through the absorbent liquid and forms tiny bubbles. The bubble wall of each bubble forms an absorption interface capable of absorbing harmful gases. In this invention, the bubbles formed accumulate in the bubble accumulation chamber 14 to form a bubble layer. During the formation of layers of bubbles, the harmful components in the initially purified gas can be fully dispersed or absorbed into the absorbent liquid. As more and more bubbles accumulate, the bubbles at the top will expand and be automatically broken or physically destroyed by the separating mesh 3. The liquid formed by the rupture of the bubble walls flows back into the absorption chamber 13 due to gravity. The clean gas continues to rise and enters the separation and recovery chamber 15. After the water vapor is removed by the dehumidification mechanism 4 in the separation and recovery chamber 15, the clean gas can be collected.

[0046] In one embodiment, the porosity of the porous plate 2 is 25% to 50%.

[0047] The porosity of the porous plate is controlled between 25% and 50%, which can generate bubbles of moderate density. The bubbles can maintain independent stacking to form a stable bubble layer, and can also expand and burst in a regular manner during the rise, so that the gas inside the bubble can fully contact, dissolve and mix with the absorbent liquid (bubble wall) to ensure that harmful gases are fully removed.

[0048] It should be noted that porosity refers to the percentage of the pore volume in the porous plate 2 to the total volume of the porous plate 2 in its natural state. Specifically, the porous plate 2 of this invention has a mounting through hole in the middle that matches the exhaust gas outlet 1121. When calculating the porosity, the total volume of the porous plate 2 in its natural state does not include the volume of the mounting through hole; that is, the volume of the mounting through hole needs to be removed when calculating the total volume of the porous plate 2 in its natural state.

[0049] In one embodiment, the vent 21 is frustum-shaped, and the diameter of the vent 21 gradually decreases from the inlet end to the outlet end.

[0050] The ratio of the diameter of the outlet end of the vent 21 to the diameter of the inlet end of the vent 21 is 1:1.2 to 1:3.

[0051] The above-mentioned structural design makes the interior of the vent 21 a variable spiral air channel, which allows the gas to violently cut the absorbent liquid when it flows through the vent 21. This promotes the formation of bubbles of uniform size, increases the gas-liquid contact area, prolongs the gas-liquid contact time, improves the absorption rate of harmful gases, and thus enhances the purification effect.

[0052] In one embodiment, the ratio of the diameter of the inlet end of the vent 21 to the depth of the vent 21 is 1:1 to 1:10, which is beneficial to further promote the formation of bubbles.

[0053] In one embodiment, the diameter of the outlet end of the vent 21 is 0.1 mm to 3 mm, and the vent depth is 0.15 mm to 30 mm. This facilitates the formation of small bubbles, thereby increasing the specific surface area of ​​the bubbles, which in turn increases the gas-liquid contact area and further improves the absorption rate of harmful gases.

[0054] In one embodiment, the separation and recovery chamber 15 is filled with a plurality of hollow spherical packings 41, and the plurality of hollow spherical packings 41 together constitute a water vapor removal mechanism 4.

[0055] After the bubble layer has absorbed all the gas, it will contain a small amount of water vapor formed by the bursting of bubbles, as well as a small number of unburst small bubbles. As the air continues to rise, the gas is passed into the separation and recovery chamber filled with hollow sphere packing. The hollow sphere packing can cause the unburst small bubbles to burst and form water vapor, and block the passage of water vapor, thereby cutting and separating the water vapor into larger water droplets. Finally, the water vapor flows back into the absorbent liquid from the edge where the wind speed is relatively low.

[0056] Specifically, hollow sphere packing can be commonly available on the market. Hollow sphere packing has a regular and abundant hollow structure and surface voids. When clean gas flows through the hollow sphere packing, droplets and water vapor in the gas will make full contact with the surface of the hollow sphere packing. Through the blocking, collision, and interception effects of the hollow sphere packing, the probability of droplet aggregation can be significantly increased, effectively capturing droplets and water vapor of different particle sizes. Compared with traditional planar interception structures, it can greatly improve the separation and removal rate of droplets and water vapor, avoid secondary pollution caused by the absorbent being carried out with the gas, and ensure the cleanliness of the final output gas.

[0057] Specifically, the separation and recovery chamber can be filled with hollow sphere packing material to achieve better water vapor removal. In some embodiments, commercially available multi-faceted hollow sphere packing material is used. During use, plastic woven fibers or sponges can also be placed inside the multi-faceted hollow sphere packing material.

[0058] In one embodiment, the diameter of the hollow sphere packing is 25 mm to 100 mm.

[0059] In one embodiment, the separator 3 can be a metal separator. Specifically, a metal separator with a mesh size smaller than that of the hollow ball packing 41 is selected to prevent the hollow ball packing 41 from passing through the metal separator and falling into the bubble accumulation cavity 14.

[0060] In one embodiment, the waste gas purification equipment further includes a replenishing liquid tank 5 and a circulating pump 7. Both the replenishing liquid tank 5 and the circulating pump 7 are installed outside the housing 1. The replenishing liquid tank 5 is connected to the absorption chamber 13. The input end of the circulating pump 7 is connected to the replenishing liquid tank 5, and the output end of the circulating pump 7 is located above the perforated plate 2. The circulating pump ensures the freshness of the absorbent liquid directly contacting the gas at the liquid surface, thereby guaranteeing the absorption effect and preventing oversaturation at the liquid surface, which would lead to a loss of absorption efficiency.

[0061] In one embodiment, the clean gas outlet 16 is provided with a concentration detection device 17, which is used to detect the residual concentration of malodorous components in the clean gas.

[0062] The concentration detection device 17 is existing technology and can employ commercially available gas detection sensors for detecting odorous components. Specifically, a commercially available single gas detection sensor can be used, meaning each odorous component to be detected is detected using a corresponding gas detection sensor. In one embodiment, the odorous gas contains three gases: dimethyl sulfide, methanethiol, and hydrogen sulfide. Three corresponding gas detection sensors can be used for each gas. In one embodiment, a Shenzhen Guoan SGA-700-C2H6S dimethyl sulfide sensor can be used to detect the concentration of dimethyl sulfide in the gas; an EC Sense DS4-CH4S methanethiol sensor can be used to detect the concentration of methanethiol in the gas; and an EC Sense DS4-H2S hydrogen sulfide sensor can be used to detect the concentration of hydrogen sulfide in the gas. In addition, gas detection sensors that integrate multiple sensors and can detect multiple gases simultaneously can be used. For example, the odor sensor from Shenzhen Guoan can be used. This odor sensor is a sensor specifically designed to detect the components and concentration of odorous gases in the air. It mainly uses integrated module technology to monitor 1-10 odor OU indicators in real time, such as hydrogen sulfide, ammonia, methanethiol, xylene, dimethyl disulfide, carbon disulfide, styrene and other odor OU values.

[0063] The technical principles of this utility model have been described above with reference to specific embodiments. These descriptions are merely for explaining the principles of this utility model and should not be construed as limiting the scope of protection of this utility model in any way. Based on this explanation, those skilled in the art can readily conceive of other specific embodiments of this utility model without any inventive effort, and these embodiments will all fall within the scope of protection of this utility model.

Claims

1. A waste gas purification device, characterized in that, Includes a housing and a perforated plate and a partition mesh installed inside the housing; The housing has an air intake channel inside, and an air intake port communicating with the air intake channel is opened on the side wall of the housing; The perforated plate is arranged circumferentially around the outside of the air inlet channel, and an absorption cavity is formed between the perforated plate and the lower part of the shell. The exhaust gas outlet of the air inlet channel is connected to the absorption cavity. The absorption cavity is used to hold the absorbent liquid. The exhaust gas to be treated is initially absorbed by the absorbent liquid in the absorption cavity to obtain the initially purified gas. The separator is installed above the air intake channel. A bubble accumulation cavity is formed between the separator, the perforated plate, the outer wall of the air intake channel and the middle part of the housing. The bottom of the bubble accumulation cavity is connected to the absorption cavity through the perforated plate. The pre-purified gas passes through the perforated plate to form bubbles. The bubble walls absorb the residual harmful gases in the pre-purified gas again to obtain clean gas. A separation and recovery chamber is formed between the separator and the upper part of the shell. The top of the bubble accumulation chamber is connected to the separation and recovery chamber through the separator. A water vapor removal mechanism is provided in the separation and recovery chamber to remove water vapor from the clean air. The shell has a clean gas outlet that is connected to the separation and recovery chamber.

2. The waste gas purification equipment according to claim 1, characterized in that, The air intake channel includes an air intake section arranged in a horizontal direction and a transition section arranged in a vertical direction. The transition section is located below the air intake section and communicates with the air intake section. The air intake section is connected to the air inlet. The transition section has the exhaust gas outlet on the side that communicates with the absorption chamber.

3. The waste gas purification equipment according to claim 1, characterized in that, The porous plate is provided with vents penetrating its opposite sides. From the inlet end of the vent to the outlet end of the vent, the cross-sectional area of ​​the vent gradually decreases. The inner wall of the vent has a spiral structure.

4. The waste gas purification equipment according to claim 3, characterized in that, The porosity of the porous plate is 25% to 50%.

5. The waste gas purification equipment according to claim 3, characterized in that, The vent is frustum-shaped, and its diameter gradually decreases from the inlet end to the outlet end. The ratio of the diameter of the outlet end of the vent to the diameter of the inlet end of the vent is 1:1.2 to 1:

3.

6. The waste gas purification equipment according to claim 3, characterized in that, The ratio of the diameter of the inlet end of the vent to the depth of the vent is 1:1 to 1:

10.

7. The waste gas purification equipment according to claim 3, characterized in that, The diameter of the outlet end of the vent is 0.1mm to 3mm, and the depth of the vent is 0.15mm to 30mm.

8. The waste gas purification equipment according to claim 1, characterized in that, The separation and recovery chamber is filled with multiple hollow spherical packing materials, which together constitute a water vapor removal mechanism.

9. The waste gas purification equipment according to claim 1, characterized in that, The exhaust gas purification equipment also includes a replenishing water tank and a circulation pump. Both the replenishing water tank and the circulation pump are installed outside the housing. The replenishing water tank is connected to the absorption chamber. The input end of the circulation pump is connected to the replenishing water tank, and the output end of the circulation pump is located above the perforated plate.

10. The waste gas purification equipment according to claim 1, characterized in that, The clean gas outlet is equipped with a concentration detection device, which is used to detect the residual concentration of malodorous components in the clean gas.

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