Waste gas purification device and waste gas purification method

Abstract

The invention discloses a waste gas purification device and a waste gas purification method. The waste gas purification device comprises a lubricating oil chamber, a vegetable oil chamber, a reactor, a water chamber and a resolver, and the lubricating oil chamber is provided with a gas inlet; the vegetable oil chamber is communicated with the lubricating oil chamber; the reactor is communicated with the vegetable oil chamber; the water chamber is communicated with the reactor and is provided with an air outlet; the resolver is arranged in the reactor, the lubricating oil chamber is communicated with the resolver through the circulation loop, the vegetable oil chamber is communicated with the resolver through the circulation loop, and the water chamber is communicated with the resolver through the circulation loop. The resolver treats lubricating oil, vegetable oil and water by using heat of the reactor, and realizes backflow through a circulation loop, so that new and old circulation of the purification media is realized, the utilization rate is improved, and the operation cost is reduced. The device can be widely applied to the technical field of waste gas treatment.

Description

Technical Field

[0001] The present application relates to the technical field of waste gas treatment, and in particular to a waste gas purification device and a waste gas purification method. Background Art

[0002] The waste gas pollution problem in the chemical, energy, building materials, petrochemical and other industries is very serious, so it is necessary to strengthen the prevention and control of waste gas pollution. However, there are many technical problems in waste gas treatment: some waste gas purification devices do not completely remove pollutants in waste gas, resulting in waste gas emissions that do not meet standards; some waste gas purification devices consume a large amount of purification media, increasing operating costs; old waste gas purification technology may become outdated and need to be updated; the treatment of solid or liquid waste generated during the waste gas purification process is difficult, and environmental protection measures need to be taken. Summary of the invention

[0003] In order to solve at least one of the above technical problems, the present application provides an exhaust gas purification device and an exhaust gas purification method, and the technical solution adopted is as follows.

[0004] The exhaust gas purification device provided in the present application includes a lubricating oil chamber, a vegetable oil chamber, a reactor, a water chamber and a parser, wherein the lubricating oil chamber has an air inlet; the vegetable oil chamber is communicated with the lubricating oil chamber; the reactor is communicated with the vegetable oil chamber; the water chamber is communicated with the reactor, and the water chamber has an air outlet; the parser is arranged in the reactor, the lubricating oil chamber is connected to the parser through a circulation loop, the vegetable oil chamber is connected to the parser through a circulation loop, and the water chamber is connected to the parser through a circulation loop.

[0005] In certain embodiments of the present application, a first diaphragm is provided at the communication port between the vegetable oil chamber and the reactor, and the first diaphragm is made of polytetrafluoroethylene.

[0006] In certain embodiments of the present application, a second diaphragm is provided at the communication port between the reactor and the water chamber, and the second diaphragm is made of polytetrafluoroethylene.

[0007] In certain embodiments of the present application, the air outlet of the water chamber is provided with a third diaphragm and a biomembrane, the third diaphragm is made of polytetrafluoroethylene, the biomembrane is configured as a metal-organic framework biomembrane, and the third diaphragm is located on the inner side of the biomembrane.

[0008] In certain embodiments of the present application, a first baffle is provided in the lubricating oil chamber, the upper end of the first baffle is connected to the top of the lubricating oil chamber, and the lower end of the first baffle is spaced a set distance L1 from the bottom of the lubricating oil chamber.

[0009] In certain embodiments of the present application, a second baffle is provided in the vegetable oil chamber, the upper end of the second baffle is connected to the top of the vegetable oil chamber, and the lower end of the second baffle is spaced a set distance L2 from the bottom of the vegetable oil chamber.

[0010] In certain embodiments of the present application, a third baffle is provided in the water chamber, the upper end of the third baffle is connected to the top of the water chamber, and the lower end of the third baffle is spaced a set distance L3 from the bottom of the water chamber.

[0011] In certain embodiments of the present application, the exhaust gas purification device includes an intake chamber, a fourth baffle is disposed in the intake chamber, the lower end of the fourth baffle is connected to the bottom of the intake chamber, and the upper end of the fourth baffle is spaced a set distance L4 from the top of the intake chamber, and the fourth baffle separates the intake chamber into the lubricating oil chamber and the vegetable oil chamber.

[0012] In certain embodiments of the present application, a heat insulating layer is provided on the outer surface of the reactor.

[0013] The exhaust gas purification method provided in the present application is implemented based on an exhaust gas purification device, and the exhaust gas is discharged after being treated through the lubricating oil chamber, the vegetable oil chamber, the reactor and the water chamber in sequence, the liquid in the lubricating oil chamber enters the parser for treatment and then flows back to the lubricating oil chamber, the liquid in the vegetable oil chamber enters the parser for treatment and then flows back to the vegetable oil chamber, and the liquid in the water chamber enters the parser for treatment and then flows back to the water chamber.

[0014] The present application has at least the following beneficial effects: the exhaust gas enters the exhaust gas purification device from the air inlet, and is processed by the lubricating oil chamber, the vegetable oil chamber, the reactor and the water chamber in sequence, ensuring that the exhaust gas is fully purified. The lubricating oil chamber, the vegetable oil chamber and the water chamber are all connected to the analyzer in the reactor through a circulation loop. The analyzer uses the heat of the reactor to process the lubricating oil, vegetable oil and water, and realizes reflux through the circulation loop, realizing the new and old cycles of these purification media, improving the utilization rate and reducing the operating cost. The present application can be widely used in the field of exhaust gas treatment technology.

[0015] Additional aspects and advantages of the present application will be given in part in the description below, and in part will become apparent from the description below, or will be learned through the practice of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The present application is further illustrated below in conjunction with the accompanying drawings and embodiments. It should be noted that the embodiments embodied in the following drawings are exemplary and are only used to explain the present application, and cannot be understood as limiting the present application.

[0017] Figure 1 It is a schematic diagram of the structure of the exhaust gas purification device.

[0018] Figure numerals: 1100, lubricating oil chamber; 1200, vegetable oil chamber; 2000, reactor; 3000, water chamber; 4000, analyzer; 5101, first baffle; 5102, second baffle; 5103, third baffle; 5200, fourth baffle; 5301, first diaphragm; 5302, second diaphragm; 5303, third diaphragm; 5400, biofilm. DETAILED DESCRIPTION

[0019] The following is combined with Figure 1 The embodiments of the present application are described in detail, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present application, and cannot be understood as limiting the present application.

[0020] In the description of the present application, it should be understood that the terms "center", "middle", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, which are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0021] In the description of this application, "several" means more than one, "more" means more than two, "greater than", "less than", "exceed", etc. are understood to exclude the number itself, and "above", "below", "within", etc. are understood to include the number itself. If there is a description of "first" or "second", it is only used for the purpose of distinguishing technical features, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features or implicitly indicating the order of the indicated technical features.

[0022] In the description of this application, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connect" should be understood in a broad sense, for example: it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0023] In the description of the present application, if the reference terms "as an implementation", "an embodiment", "some instances", "some embodiments", "illustrative embodiment", "example", "specific example", "some examples", etc. appear, it means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner.

[0024] The present application relates to an exhaust gas purification device, Figure 1 The exhaust gas purification device includes a lubricating oil chamber 1100, a vegetable oil chamber 1200, a reactor 2000 and a water chamber 3000. The vegetable oil chamber 1200 is communicated with the lubricating oil chamber 1100, the reactor 2000 is communicated with the vegetable oil chamber 1200, and the chamber is communicated with the reactor 2000. The lubricating oil chamber 1100 has an air inlet, which is located on the side wall of the lubricating oil chamber 1100, and the water chamber 3000 has an air outlet, which is located on the side wall of the water chamber 3000.

[0025] It is understood that the waste gas enters the lubricating oil chamber 1100 from the air inlet, and is processed by the lubricating oil chamber 1100, the vegetable oil chamber 1200, the reactor 2000 and the water chamber 3000 in sequence before being discharged from the air outlet. The lubricating oil chamber 1100 and the vegetable oil chamber 1200 can remove volatile organic matter in the waste gas. The reactor 2000 can remove nitrogen oxides in the waste gas. The water chamber 3000 can absorb excess ammonia in the waste gas and convert it into ammonium salts, which can be reused as resources.

[0026] Compared with the complicated process flow of traditional waste gas treatment equipment, the waste gas purification device of the present application integrates the reactor 2000 and multiple chambers into one device, thereby improving the waste gas purification rate.

[0027] Furthermore, combined with Figure 1 The exhaust gas purification device includes a parser 4000, which is arranged in the reactor 2000. The parser 4000 can use the heat of the reactor 2000 to process the liquids in the lubricating oil chamber 1100, the vegetable oil chamber 1200 and the water chamber 3000, and reflux the treated liquid, thereby realizing the new and old circulation of the liquid.

[0028] The lubricating oil chamber 1100 is connected to the parser 4000 through a circulation loop. Two pipelines are arranged between the lubricating oil chamber 1100 and the parser 4000, and both pipelines are arranged at the bottom of the lubricating oil chamber 1100. The lubricating oil in the lubricating oil chamber 1100 enters the parser 4000 through one of the pipelines. The parser 4000 uses the waste heat of the reactor 2000 to perform thermal analysis on the lubricating oil to separate the organic waste gas. The lubricating oil treated by the parser 4000 flows back to the lubricating oil chamber 1100 through the other pipeline, thereby realizing the circulation of the lubricating oil.

[0029] Lubricants are mineral oils, and their main chemical components include high-boiling point, high-molecular-weight hydrocarbons and non-hydrocarbon mixtures. The role of these lubricants is to help remove volatile organic compounds (VOCs) in exhaust gas. Volatile organic compounds (VOCs) refer to organic compounds that are easily volatile at normal temperature and pressure. They are an important class of air pollutants, including benzene, toluene, formaldehyde, and sulfides. These substances have potential hazards to human health and the environment, so exhaust gas treatment is required.

[0030] Lubricating oil captures VOCs through physical adsorption because VOCs molecules can be adsorbed by long-chain fatty acids in lubricating oil. VOCs are first adsorbed and enriched, and then desorbed and recovered at high temperature or high pressure, which has the advantages of mature technology, simple operation, low energy consumption, and high purification efficiency. Vegetable oils and lubricating oils usually have a high specific surface area, which enables them to capture VOCs molecules through physical adsorption. This adsorption mainly relies on the van der Waals force between molecules, which is a non-polar or weakly polar interaction. During the physical adsorption process, VOCs molecules are adsorbed onto the surface of vegetable oils and lubricating oils to form a thin film, thereby reducing the VOCs content in the exhaust gas.

[0031] The vegetable oil chamber 1200 is connected to the parser 4000 through a circulation loop. Two pipelines are arranged between the vegetable oil chamber 1200 and the parser 4000, and both pipelines are arranged at the bottom of the vegetable oil chamber 1200. The vegetable oil in the vegetable oil chamber 1200 enters the parser 4000 through one of the pipelines. The parser 4000 uses the waste heat of the reactor 2000 to perform thermal analysis on the vegetable oil and separate the organic waste gas. The vegetable oil processed by the parser 4000 flows back to the vegetable oil chamber 1200 through the other pipeline, thereby realizing the circulation of the vegetable oil.

[0032] The main components of vegetable oil are triglycerides, which are ester compounds composed of glycerol and long-chain fatty acids. They can be biodegraded and quickly reduce environmental pollution. As an oily substance, vegetable oil has a certain solubility and adsorption effect on certain VOCs.

[0033] The core of the reactor 2000 is a catalyst, which can promote the chemical reaction between nitrogen oxides (NOx) and a reducing agent (usually ammonia or urea), converting nitrogen oxides into harmless nitrogen (N2) and water (H2O). In the reactor, nitrogen oxides (NOx) undergo a selective catalytic reduction reaction with ammonia (NH3) under the action of the catalyst to generate nitrogen (N2) and water (H2O), which is an efficient method for removing nitrogen oxides. At the same time, the high temperature environment inside the reactor 2000 helps to increase the reaction rate, making it easier for nitrogen oxides to be reduced.

[0034] The water chamber 3000 is connected to the parser 4000 through a circulation loop, and two pipelines are arranged between the water chamber 3000 and the parser 4000, and both pipelines are arranged at the bottom of the water chamber 3000. The water in the water chamber 3000 enters the parser 4000 through one of the pipelines, and the parser 4000 uses the waste heat of the reactor 2000 to perform thermal analysis on the water. The water treated by the parser 4000 flows back to the water chamber 3000 through the other pipeline, thereby realizing water circulation.

[0035] The water in the water chamber 3000 is tap water, pure water or ultrapure water. Ammonia can form hydrogen bonds with water molecules, and this interaction enhances the solubility of ammonia in water. Ammonia molecules can combine with water molecules through hydrogen bonds to generate NH4OH, which greatly increases the solubility of ammonia in water. The hydrogen bond forming ability of ammonia combined with the polarity of water allows ammonia to dissolve quickly and effectively in water. At the same time, in the water chamber, the flow of gas increases the concentration gradient of ammonia, which promotes the diffusion and dissolution of ammonia. The fluidity of water helps to transfer ammonia from the gas phase to the liquid phase, thereby improving the removal efficiency.

[0036] As an implementation mode, a heat insulating layer is provided on the outer surface of the reactor 2000 to reduce the heat dissipation of the reactor 2000 and improve the utilization rate of the waste heat.

[0037] In some examples, parser 4000 is provided with a thermometer that monitors the temperature of parser 4000 .

[0038] As an embodiment, a first baffle 5101 is provided in the lubricating oil chamber 1100, and the first baffle 5101 is arranged vertically. Figure 1 The upper end of the first baffle 5101 is connected to the top of the lubricating oil chamber 1100 , and there is a set distance L1 between the lower end of the first baffle 5101 and the bottom of the lubricating oil chamber 1100 .

[0039] The liquid level of the lubricating oil in the lubricating oil chamber 1100 overflows the lower end of the first baffle 5101, and the first baffle 5101 divides the cavity above the liquid level in the lubricating oil chamber 1100 into two independent spaces. Under the blocking of the first baffle 5101, the exhaust gas entering the lubricating oil chamber 1100 can be fully integrated into the lubricating oil, so that the lubricating oil can fully treat the exhaust gas.

[0040] As an embodiment, a second baffle 5102 is provided in the vegetable oil chamber 1200, and the second baffle 5102 is arranged vertically. Figure 1 The upper end of the second baffle 5102 is connected to the top of the vegetable oil chamber 1200 , and there is a set distance L2 between the lower end of the second baffle 5102 and the bottom of the vegetable oil chamber 1200 .

[0041] The liquid level of the vegetable oil in the vegetable oil chamber 1200 overflows the lower end of the second baffle 5102, and the second baffle 5102 separates the cavity above the liquid level in the vegetable oil chamber 1200 into two independent spaces. Under the obstruction of the second baffle 5102, the exhaust gas entering the vegetable oil chamber 1200 can be fully integrated into the vegetable oil, so that the vegetable oil can fully treat the exhaust gas.

[0042] It should be noted that there is no necessary numerical relationship between L1 and L2, and the two can be equal or unequal.

[0043] As an embodiment, the exhaust gas purification device includes an air intake chamber, and the lubricating oil chamber 1100 and the vegetable oil chamber 1200 are both arranged in the air intake chamber. In the air intake chamber, the lubricating oil chamber 1100 and the vegetable oil chamber 1200 are arranged adjacent to each other and communicated with each other.

[0044] Specifically, a fourth baffle 5200 is disposed in the air inlet chamber, and the fourth baffle 5200 is arranged vertically. Figure 1 , the lower end of the fourth baffle 5200 is connected to the bottom of the air intake chamber, and the upper end of the fourth baffle 5200 is spaced from the top of the air intake chamber by a set distance L4. In this case, the fourth baffle 5200 separates the air intake chamber into the lubricating oil chamber 1100 and the vegetable oil chamber 1200, and a connecting area between the lubricating oil chamber 1100 and the vegetable oil chamber 1200 is formed between the top of the fourth baffle 5200 and the top of the air intake chamber.

[0045] It can be understood that the air inlet of the lubricating oil chamber 1100 is located on the side wall of the air inlet chamber, and the connecting port between the vegetable oil chamber 1200 and the reactor 2000 is located on the side wall of the air inlet chamber.

[0046] As an implementation method, in combination with the attached Figure 1A first diaphragm 5301 is provided at the communication port between the vegetable oil chamber 1200 and the reactor 2000 , and the first diaphragm 5301 isolates the vegetable oil chamber 1200 and the reactor 2000 .

[0047] Specifically, the first diaphragm 5301 is made of polytetrafluoroethylene.

[0048] The excellent performance of polytetrafluoroethylene (PTFE) material is mainly reflected in the following aspects:

[0049] Chemical inertness: PTFE has excellent chemical stability and can resist corrosion from a variety of acids, alkalis and organic solvents, making it suitable for treating various industrial waste gases. This chemical inertness ensures that the diaphragm will not react with pollutants in the gas during the treatment process, thereby avoiding secondary pollution;

[0050] High temperature resistance: PTFE's high temperature resistance allows it to remain stable in high temperature environments and is not easily deformed or degraded. This feature makes PTFE suitable for a variety of waste gas treatment processes, especially when high temperature gases flow through it;

[0051] Excellent isolation performance: The microporous structure of PTFE can effectively isolate pollutants in the gas and prevent them from passing through the diaphragm, thereby improving purification efficiency. This isolation performance makes PTFE perform well in gas separation and filtration applications;

[0052] Low friction coefficient: PTFE's low friction characteristics enable it to reduce flow resistance during gas flow and improve the efficiency of the system. This is especially important in the waste gas treatment process, which can reduce energy consumption and improve overall treatment efficiency;

[0053] Aging resistance: PTFE has good aging resistance and can maintain its physical and chemical properties after long-term use, thus extending the service life of the equipment.

[0054] As an implementation method, in combination with the attached Figure 1 A second diaphragm 5302 is provided at the communication port between the reactor 2000 and the water chamber 3000 , and the second diaphragm 5302 isolates the reactor 2000 and the water chamber 3000 .

[0055] Specifically, the second diaphragm 5302 is made of polytetrafluoroethylene.

[0056] As an embodiment, a third baffle 5103 is provided in the water chamber 3000, and the third baffle 5103 is arranged vertically. Figure 1 The upper end of the third baffle 5103 is connected to the top of the water chamber 3000 , and a set distance L3 is provided between the lower end of the third baffle 5103 and the bottom of the water chamber 3000 .

[0057] The liquid level in the water chamber 3000 overflows the lower end of the third baffle 5103, and the third baffle 5103 divides the cavity above the liquid level in the water chamber 3000 into two independent spaces. Under the blocking of the third baffle 5103, the exhaust gas entering the water chamber 3000 can be fully integrated into the water to fully treat the exhaust gas.

[0058] It should be noted that there is no necessary numerical relationship between L1, L2 and L3, and the three can be equal or unequal.

[0059] As an embodiment, a biofilm 5400 is provided at the gas outlet of the water chamber 3000, and the biofilm 5400 is provided as a metal-organic framework biofilm to achieve biological desulfurization. The biofilm 5400 performs sulfur oxidation on the waste gas, chemically reacts sulfides such as hydrogen sulfide and sulfur dioxide in the waste gas into sulfates, thereby reducing the sulfur content in the waste gas.

[0060] Metal-Organic Frameworks (MOFs) materials are a type of crystalline material with a periodic network structure and highly porous properties, which is formed by self-assembly of metal ions or metal clusters and organic ligands (also called "linkers" or "ligands") through coordination bonds.

[0061] Furthermore, the air outlet of the water chamber 3000 is provided with a third diaphragm 5303. Figure 1 The third diaphragm 5303 is located on the inner side of the biofilm 5400 , and the third diaphragm 5303 isolates the biofilm 5400 and the water chamber 3000 .

[0062] Specifically, the third diaphragm 5303 is made of polytetrafluoroethylene.

[0063] It should be noted that the exhaust gas purification device utilizes structures such as the first diaphragm 5301, the second diaphragm 5302 and the third diaphragm 5303 to isolate different exhaust gas purification areas, so as to give full play to the purification effect of each area and achieve the best exhaust gas treatment effect.

[0064] The contents of the waste gas purification method in the present application are described in detail below in conjunction with specific embodiments. It should be noted that the following description is only for illustrative purposes and is not a specific limitation to the present application.

[0065] The present application relates to a waste gas purification method, which is implemented based on a waste gas purification device to achieve the purification, efficient separation, and recycling of waste gas.

[0066] The exhaust gas is sequentially treated in the lubricating oil chamber 1100, the vegetable oil chamber 1200, the reactor 2000 and the water chamber 3000 before being discharged.

[0067] The waste gas removes volatile organic matter in the lubricating oil chamber 1100 and the vegetable oil chamber 1200. The waste gas removes nitrogen oxides in the reactor 2000, undergoes chemical reactions to produce nitrogen, and generates heat. The waste gas removes ammonia in the water chamber 3000 and generates ammonium salts. Furthermore, the biofilm 5400 provided at the outlet of the water chamber 3000 reduces the sulfur content in the waste gas and removes sulfides as much as possible by utilizing the sulfur oxidation of sulfur-oxidizing bacteria.

[0068] A first diaphragm 5301 is set at the connecting port between the vegetable oil chamber 1200 and the reactor 2000, a second diaphragm 5302 is set at the connecting port between the reactor 2000 and the water chamber 3000, and a third diaphragm 5303 is set at the outlet of the water chamber 3000, so as to isolate different exhaust gas purification areas and purify the exhaust gas layer by layer, thereby ensuring effective purification of the exhaust gas and reducing pollution to the environment.

[0069] The liquid in the lubricating oil chamber 1100 enters the analyzer 4000 for processing and then flows back to the lubricating oil chamber 1100, thus realizing the circulation of the lubricating oil.

[0070] The liquid in the vegetable oil chamber 1200 enters the analyzer 4000 for processing and then flows back to the vegetable oil chamber 1200, thus realizing the circulation of the vegetable oil.

[0071] The liquid in the water chamber 3000 enters the analyzer 4000 for processing and then flows back to the water chamber 3000, thus realizing water circulation.

[0072] The above is a detailed description of the implementation methods of the present application in conjunction with the accompanying drawings, but the present application is not limited to the above implementation methods. Various changes can be made within the knowledge of ordinary technicians in the technical field without departing from the purpose of the present application. In addition, the embodiments of the present application and the features in the embodiments can be combined with each other without conflict.

Claims

1. An exhaust gas purification device, characterized in that: include a lubricating oil chamber, the lubricating oil chamber having an air inlet; a vegetable oil chamber, the vegetable oil chamber being in communication with the lubricating oil chamber; a reactor, the reactor being in communication with the vegetable oil chamber; A water chamber, the water chamber is communicated with the reactor, and the water chamber has an air outlet; The parser is arranged in the reactor, the lubricating oil chamber is connected to the parser through a circulation loop, the vegetable oil chamber is connected to the parser through a circulation loop, and the water chamber is connected to the parser through a circulation loop.

2. The exhaust gas purification device according to claim 1, characterized in that: A first diaphragm is provided at the communication port between the vegetable oil chamber and the reactor, and the first diaphragm is made of polytetrafluoroethylene.

3. The exhaust gas purification device according to claim 1, characterized in that: A second diaphragm is provided at the communication port between the reactor and the water chamber, and the second diaphragm is made of polytetrafluoroethylene.

4. The exhaust gas purification device according to claim 1, characterized in that: The air outlet of the water chamber is provided with a third diaphragm and a biomembrane, the third diaphragm is made of polytetrafluoroethylene, the biomembrane is provided as a metal-organic framework biomembrane, and the third diaphragm is located on the inner side of the biomembrane.

5. The exhaust gas purification device according to claim 1, characterized in that: A first baffle is disposed in the lubricating oil chamber, the upper end of the first baffle is connected to the top of the lubricating oil chamber, and a set distance L1 is provided between the lower end of the first baffle and the bottom of the lubricating oil chamber.

6. The exhaust gas purification device according to claim 1, characterized in that: A second baffle is provided in the vegetable oil chamber, the upper end of the second baffle is connected to the top of the vegetable oil chamber, and a set distance L2 is provided between the lower end of the second baffle and the bottom of the vegetable oil chamber.

7. The exhaust gas purification device according to claim 1, characterized in that: A third baffle is disposed in the water chamber, the upper end of the third baffle is connected to the top of the water chamber, and a set distance L3 is provided between the lower end of the third baffle and the bottom of the water chamber.

8. The exhaust gas purification device according to claim 1, characterized in that: The exhaust gas purification device includes an air intake chamber, in which a fourth baffle is arranged, the lower end of the fourth baffle is connected to the bottom of the air intake chamber, and there is a set distance L4 between the upper end of the fourth baffle and the top of the air intake chamber, and the fourth baffle separates the air intake chamber into the lubricating oil chamber and the vegetable oil chamber.

9. The exhaust gas purification device according to claim 1, characterized in that: The outer surface of the reactor is provided with a heat insulating layer.

10. A method for purifying waste gas, characterized in that: The exhaust gas purification method is implemented based on the exhaust gas purification device according to any one of claims 1 to 9, the exhaust gas is discharged after being treated by the lubricating oil chamber, the vegetable oil chamber, the reactor and the water chamber in sequence, the liquid in the lubricating oil chamber enters the parser for treatment and then flows back to the lubricating oil chamber, the liquid in the vegetable oil chamber enters the parser for treatment and then flows back to the vegetable oil chamber, and the liquid in the water chamber enters the parser for treatment and then flows back to the water chamber.

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