A flue gas purification device

Abstract

The present invention discloses a flue gas purification device to solve the technical problem of improving the purification efficiency of pollutants with smaller particle sizes on the basis of gas purification based on the principle of impact dust collector. It includes a pollutant absorption device, which includes: an upper baffle, which is arranged in the tower body and close to the lower part of the tower body, and is used to divide the lower part of the tower body into an upper chamber and a lower chamber; a lower baffle, which is arranged below the upper baffle and divides the lower chamber into a lower upper chamber and a lower lower chamber, and a through hole is opened on the lower baffle to connect the lower upper chamber with the lower lower chamber; an air intake pipe, the inlet of the air intake pipe is arranged on the side wall of the tower body as the inlet of the gas to be purified, and the outlet of the air intake pipe penetrates the upper baffle and is connected with the lower upper chamber; an absorption liquid conduit pipe group, which is composed of a plurality of absorption liquid conduits distributed on the upper baffle and the lower baffle; an air flow conduit pipe group and an absorption liquid.

Description

Technical Field

[0001] The invention relates to the technical field of flue gas purification, and in particular to a flue gas purification device. Background Art

[0002] Impact dust collector is a kind of dust removal equipment that directly impacts the dust-containing gas with a certain kinetic energy onto the liquid (water) surface to form droplets and reach the dust removal destination. Common impact dust collectors include impact water bath dust collector and accelerated impact dust collector. Impact water bath dust collector is a type of wet dust collector with simple structure, low investment and operation cost and high dust removal efficiency. Impact water bath dust collector relies on the high-speed gas ejected from the nozzle (diffuser) to impact the liquid (usually water) surface, thereby stirring up a large amount of foam and water droplets, forming a strong water splash, and then the flue gas turns 180° to change its flow direction. Due to inertia, most of the smoke and dust particles are settled in the water, and the other part of the fine dust is further purified by the foam and water droplets that form the water splash. The purified airflow is dehydrated by the airflow demisting device (usually a water baffle) and discharged. The accelerated impact dust collector is an improvement on the structure of the impact water bath dust collector. When the dust-laden airflow is sprayed into the water from the air inlet pipe, a cone is provided at the outlet of the pipe to increase the speed of the airflow rushing into the water.

[0003] The inventors noticed that the existing impact dust collectors are designed to remove dust, that is, to remove smoke from the gas. The particle size of the smoke is often large (the particle size of the smoke is mainly distributed above 5 microns), and the impact dust collector has a high dust removal efficiency for this type of smoke. However, if the impact dust collector is used to filter pollutants with smaller particle sizes in the gas, the impact dust collector has a low purification efficiency for such pollutants. Summary of the invention

[0004] The object of the present invention is to provide a flue gas purification device to solve the technical problem of improving the purification efficiency of pollutants with smaller particle sizes on the basis of gas purification based on the principle of an impact dust collector.

[0005] To this end, a flue gas purification device is provided. It includes a pollutant absorption device, which is arranged at the lower part of a tower body with an inlet for gas to be purified and an outlet for purified gas, and the pollutant absorption device includes: an upper baffle, which is arranged in the tower body and close to the lower part of the tower body, and is used to divide the lower part of the tower body into an upper chamber and a lower chamber; a lower baffle, which is arranged below the upper baffle and divides the lower chamber into a lower upper chamber and a lower lower chamber, and a through hole is opened on the lower baffle to connect the lower upper chamber with the lower lower chamber; an air inlet pipe, the inlet of the air inlet pipe is arranged on the side wall of the tower body as the inlet of the gas to be purified, and the outlet of the air inlet pipe penetrates the The upper partition is connected with the lower upper chamber; an absorption liquid conduit tube group, which is composed of a plurality of absorption liquid conduits distributed on the upper partition and the lower partition to connect the upper chamber and the lower lower chamber, and a liquid collecting component is provided at the upper end of each absorption liquid conduit; an airflow conduit tube group, which is composed of a plurality of airflow conduits distributed on the upper partition and the lower partition to connect the upper chamber and the lower lower chamber; absorption liquid, which is contained in the lower part of the tower body and can generate foam under the impact of airflow, and the absorption liquid and the foam generated by the absorption liquid can absorb pollutants in the gas to be purified.

[0006] As an optimization and / or instantiation of the above-mentioned flue gas purification equipment, it also includes an airflow demister device, which is arranged in the tower body and located above the pollutant absorption device.

[0007] As an optimization and / or instantiation of the above-mentioned flue gas purification equipment, it also includes a flue gas filtering device, which is arranged at the upper part of the tower body, and the airflow demisting device is located between the pollutant absorption device and the flue gas filtering device; the upper part of the tower body is provided with the purified gas outlet which is connected to the exhaust port of the flue gas filtering device.

[0008] As an optimization and / or instantiation of the above-mentioned flue gas purification device, the flue gas filtering device is configured to adopt an adsorption filler filter.

[0009] As an optimization and / or instantiation of the above-mentioned flue gas purification equipment, the adsorption filler filter uses activated carbon as the adsorption filler.

[0010] As an optimization and / or instantiation of the above-mentioned flue gas purification equipment, the adsorption filler filter includes a plurality of adsorption filler installation compartments horizontally spaced apart in the upper part of the tower body, each of the plurality of adsorption filler installation compartments having an adsorption filler installation inlet and outlet and air-permeable walls on both sides of the adsorption filler installation inlet and outlet, the adsorption filler installation inlet and outlet extending to the side wall of the tower body and being in a closed state during operation, the adsorption filler of the adsorption filler filter being installed in each adsorption filler installation compartment through the corresponding adsorption filler installation inlet and outlet, the upper and lower parts of the plurality of adsorption filler installation compartments being respectively installed in the tower body through an upper support plate and a lower support plate, the air inlets being spaced apart on the lower support plate, the exhaust ports being spaced apart on the upper support plate, the air inlets and exhaust ports being staggered so that the gas entering from each air inlet passes through the air-permeable walls on both sides of the corresponding adsorption filler installation compartment and the adsorption filler between them and then is discharged from the corresponding exhaust port.

[0011] As an optimization and / or instantiation of the above-mentioned flue gas purification equipment, the airflow demister device adopts a baffle demister.

[0012] As an optimization and / or instantiation of the above-mentioned flue gas purification equipment, the flue gas purification equipment also includes a liquid replenishment tank located next to the tower body, and a connecting vessel is formed between the liquid replenishment tank and the tower body so that the liquid level of the absorption liquid in the liquid replenishment tank is the same as the liquid level of the absorption liquid in the tower body.

[0013] As an optimization and / or instantiation of the above-mentioned flue gas purification device, the liquid collecting component adopts a liquid collecting funnel.

[0014] The above-mentioned flue gas purification equipment design improves the purification efficiency of small-particle pollutants (such as volatile organic compounds (VOCs) in ultrasonic kerosene cleaning exhaust gas) through innovative structural design. The core concept is to use the synergistic effect of the upper chamber, the lower upper chamber, the lower lower chamber, the absorption liquid duct tube group and the airflow duct tube group to make the gas first impact the absorption liquid downward, then flow to the lower end of each airflow duct, and then move upward through each airflow duct. The gas flowing out from the upper end of each airflow duct is fully contacted with the foam gushing out from the upper end of each airflow duct, thereby greatly increasing the contact area and time between the gas and the absorption liquid, and at the same time, significantly improving the uniformity of gas distribution in the foam. In addition, this design is not only highly adaptable and can be optimized for different types of pollutants, but also has the advantages of high space utilization efficiency and convenient maintenance. Compared with traditional impact dust collectors, it is more efficient in treating small-particle pollutants, which can significantly improve the environmental protection effect of industrial waste gas treatment while reducing energy consumption.

[0015] The present invention is further described below in conjunction with the accompanying drawings and specific embodiments. Additional aspects and advantages of the present invention will be partially given in the following description, partially become apparent from the following description, or be learned through practice. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The drawings constituting a part of this specification are used to assist the understanding of the present invention. The contents provided in the drawings and the related descriptions in this specification can be used to explain the present invention, but do not constitute improper limitations on the present invention.

[0017] Figure 1 This is a front view of a flue gas purification device according to an embodiment of the present invention.

[0018] Figure 2 for Figure 1 The right side view of the flue gas purification equipment is shown.

[0019] Figure 3 for Figure 1 An AA sectional view of the flue gas purification equipment is shown.

[0020] Figure 4 for Figure 2 A BB sectional view of the flue gas purification equipment shown.

[0021] Figure 5 for Figure 1 A three-dimensional schematic diagram of a flue gas purification device in a half-section state is shown.

[0022] Figure 6 The figure is a schematic diagram of the internal structure of an air flow duct in a flue gas purification device according to an embodiment of the present invention.

[0023] Figure 7 for Figure 6 The diagram shows the structure of the inner surface of the airflow duct after it is flattened.

[0024] Marked in the figure are: tower body 11; inlet 111 for gas to be purified; outlet 112 for purified gas; pollutant absorption device 12; upper partition 121; lower partition 122; through hole 1221; air inlet pipe 123; absorption liquid conduit 124; liquid collecting component 125; air flow conduit 126; spoiler structure 1261; air flow demister 13; flue gas filtering device 14; adsorption filler mounting cabin 141; adsorption filler mounting inlet and outlet 1411; air permeable wall 1412; upper support plate 142; lower support plate 143. DETAILED DESCRIPTION

[0025] The present invention is described clearly and completely below in conjunction with the accompanying drawings. A person skilled in the art will be able to implement the present invention based on these descriptions. Before describing the present invention in conjunction with the accompanying drawings, it should be particularly noted that:

[0026] The technical solutions and technical features provided in each section, including the following description, can be combined with each other without conflict. In addition, where possible, these technical solutions, technical features and related combinations can be assigned specific technical themes and protected by relevant patents.

[0027] The embodiments of the present invention involved in the following description are generally only a part of the embodiments rather than all the embodiments. Based on these embodiments, all other embodiments obtained by ordinary technicians in this field without making creative work should fall within the scope of patent protection.

[0028] Regarding the terms and units in this specification: The terms "include", "comprises", "have" and any variations thereof in this specification and the corresponding claims and related parts are intended to cover non-exclusive inclusions. In addition, other relevant terms and units can be reasonably interpreted based on the relevant content provided in this specification.

[0029] Figure 1 This is a front view of a flue gas purification device according to an embodiment of the present invention. Figure 2 for Figure 1 The right side view of the flue gas purification equipment is shown. Figure 3 for Figure 1 An AA sectional view of the flue gas purification equipment is shown. Figure 4 for Figure 2 A BB sectional view of the flue gas purification equipment shown. Figure 5 for Figure 1 The three-dimensional schematic diagram of the flue gas purification device in a half-section state is shown. Figure 1-5As shown, a flue gas purification device includes a pollutant absorption device 12, which is arranged at the lower part of a tower body 11 having a to-be-purified gas inlet 111 and a purified gas outlet 112, and the pollutant absorption device 12 includes: an upper baffle 121, which is arranged in the tower body 11 and close to the lower part of the tower body 11, and is used to divide the lower part of the tower body 11 into an upper chamber and a lower chamber; a lower baffle 122, which is arranged below the upper baffle 121 and divides the lower chamber into a lower upper chamber and a lower lower chamber, and a through hole 1221 for connecting the lower upper chamber with the lower lower chamber is opened on the lower baffle 122; an air inlet pipe 123, the inlet of the air inlet pipe 123 is arranged on the side wall of the tower body 11 as the to-be-purified gas inlet 111, and the air inlet pipe The outlet of 123 penetrates into the upper baffle plate 121 and communicates with the lower upper chamber; an absorption liquid conduit tube group, which is composed of a plurality of absorption liquid conduits 124 distributed on the upper baffle plate 121 and the lower baffle plate 122 to communicate with each other, and a liquid collecting component 125 (specifically a liquid collecting funnel) is provided at the upper end of each absorption liquid conduit 124; an airflow conduit tube group, which is composed of a plurality of airflow conduits 126 distributed on the upper baffle plate 121 and the lower baffle plate 122 to communicate with each other; absorption liquid, which is contained in the lower part of the tower body 11 and can generate foam under the impact of airflow, and the absorption liquid and the foam generated by the absorption liquid can absorb pollutants in the gas to be purified.

[0030] The height of the lower ends of the plurality of absorption liquid conduits 124 can be lower than the height of the lower ends of the plurality of air flow conduits 126, so that the lower ends of the plurality of air flow conduits 126 are always inserted into the absorption liquid in the lower chamber. This ensures that the absorption liquid can flow back smoothly through the absorption liquid conduits 124, while the gas can rise through the air flow conduits 126.

[0031] The absorption liquid is usually a special liquid, and its composition depends on the type of pollutants to be treated. Its main function is to absorb pollutants in the gas to be purified. It can produce foam under the impact of airflow, increase the gas-liquid contact area, and thus improve the purification efficiency. The absorption liquid is circulated in the lower part of the tower body and refluxed through the absorption liquid conduit. The absorption liquid can be either water or a solution prepared with water as a solvent. For example, when the gas to be purified is ultrasonic kerosene cleaning waste gas, a surfactant and water can be prepared into an absorption liquid. At this time, the surfactant can significantly reduce the surface tension of water, making it easier for the absorption liquid to form foam.

[0032] Combination Figure 1-5As shown, the working principle of the above flue gas purification equipment is: the gas to be purified enters the air inlet pipe 123 from the gas inlet 111 to be purified, and then flows from the air inlet pipe 123 from top to bottom and impacts the absorption liquid in the lower upper chamber. These gases continue to flow downward to the lower end of each airflow duct 126, and then move upward through each airflow duct 126. The gas flowing out from the upper end of each airflow duct 126 is fully contacted with the foam gushing from the upper end of each airflow duct 126. At the same time, the liquid gathered by the foam in the upper chamber is collected by the liquid collecting component 125 and returned to the absorption liquid. The purified gas flows out from the upper chamber again.

[0033] The above-mentioned flue gas purification equipment design improves the purification efficiency of small-particle pollutants through innovative structural design. The core concept is to use the synergistic effect of the upper chamber, the lower upper chamber, the lower lower chamber, the absorption liquid duct tube group and the airflow duct tube group to make the gas first impact the absorption liquid downward, then flow to the lower end of each airflow duct, and then move upward through each airflow duct. The gas flowing out from the upper end of each airflow duct is fully in contact with the foam gushing out from the upper end of each airflow duct, thereby greatly increasing the contact area and time between the gas and the absorption liquid, and at the same time, significantly improving the uniformity of gas distribution in the foam. In addition, this design is not only highly adaptable and can be optimized for different types of pollutants, but also has the advantages of high space utilization efficiency and convenient maintenance. Compared with traditional impact dust collectors, it is more efficient in treating small-particle pollutants, and can significantly improve the environmental protection effect of industrial waste gas treatment while reducing energy consumption.

[0034] Figure 6 The figure is a schematic diagram of the internal structure of an air flow duct in a flue gas purification device according to an embodiment of the present invention. Figure 7 for Figure 6 The schematic diagram of the inner surface structure of the airflow duct after flattening is shown. Figure 6-Figure 7As shown, a spoiler structure 1261 can be provided inside the above-mentioned multiple airflow ducts 126. The spoiler structure 1261 provided inside the airflow duct 126 has the following important functions: First, increase the gas-liquid contact area: the spoiler structure 1261 can break the linear motion of the airflow, so that the airflow forms a vortex or spiral flow in the airflow duct 126. This flow mode increases the contact area between the gas and the liquid film or foam adsorbed on the tube wall, thereby improving the absorption efficiency of pollutants. Second, extend the gas residence time: by changing the airflow path, the spoiler structure can extend the residence time of the gas in the duct, which gives the pollutants more opportunities to contact and be absorbed by the absorption liquid, further improving the purification efficiency. Third, promote the formation and renewal of the liquid film: the spoiler structure can help form a more uniform liquid film on the tube wall and promote the continuous renewal of the liquid film, which ensures that fresh absorption liquid is constantly involved in the absorption process and maintains efficient pollutant removal. Fourth, improve the mass transfer efficiency: by generating turbulence and local high-speed areas, the spoiler structure can break the boundary layer, enhance the mass transfer process between the gas and liquid phases, and accelerate the transfer of pollutants from the gas phase to the liquid phase. Fifth, prevent short circuit phenomenon: the turbulence structure can reduce the "short circuit" phenomenon of gas in the tube, that is, prevent some gas from passing quickly without being fully processed, and ensure that all gas is evenly and effectively purified. Sixth, promote foam generation: the turbulence structure can assist in the generation of foam and improve the ability of foam to capture pollutants.

[0035] like Figure 7 As shown, the spoiler structure 1261 adopts a diamond-shaped protrusion structure arranged in an array on the inner wall of the airflow duct 126, and the two sharp corners of the diamond-shaped protrusion structure are parallel to the axial direction of the airflow duct 126. This spoiler structure 1261 has a small pressure loss on the one hand, and a good spoiler effect on the other hand. On this basis, the airflow duct 126 can be manufactured in the following manner: first, an array arrangement (rectangular array, two adjacent rows are staggered) of diamond-shaped protrusion structures is processed on the surface of the flat plate, and then the flat plate is annularly bent to form the airflow duct 126. The above-mentioned processing method can be stamping, stretching, milling, welding, etc.

[0036] In this embodiment, the flue gas purification equipment further includes an airflow demister 13, which is arranged in the tower body 11 and above the pollutant absorption device 12. The airflow demister 13 can remove the absorption liquid carried in the gas passing through the pollutant absorption device 12, thereby playing a demisting role. In this embodiment, the airflow demister specifically adopts a baffle demister. The baffle demister achieves a demisting effect by rotating the airflow passing through the swirl blades through the swirl blades.

[0037] In this embodiment, the flue gas purification device further includes a flue gas filter device 14, which is arranged at the upper part of the tower body 11, and the airflow demisting device 13 is located between the pollutant absorption device 12 and the flue gas filter device 14; the upper part of the tower body 11 is provided with the purified gas outlet 112 which is connected to the exhaust port of the flue gas filter device 14. The flue gas filter device 14 effectively improves the processing capacity of the entire flue gas purification device, providing a strong guarantee for clean emission.

[0038] Specifically, the smoke filter device 14 is provided with an adsorption filler filter. An adsorption filler filter refers to a filter that uses an adsorption filler as a filter medium. The adsorption filler can be a suitable adsorbent, and in this embodiment, activated carbon is used.

[0039] The above-mentioned flue gas filter device 14 plays a key terminal treatment role in the flue gas purification equipment. It is arranged at the upper part of the tower body 11, after the airflow demister 13, and serves as the last barrier for gas purification. When the flue gas filter device 14 adopts an adsorption filler filter, it is filled with adsorption fillers such as activated carbon. When the gas treated by the pollutant absorption device 12 and the airflow demister 13 flows through the flue gas filter device 14, the adsorption fillers such as activated carbon can further adsorb the remaining fine particles and harmful gas molecules, including some pollutants that are difficult to completely remove by wet scrubbing. This process can not only improve the purification efficiency of the entire flue gas purification equipment, ensure that the exhaust gas meets more stringent environmental protection standards, but also further improve the quality of the exhaust gas.

[0040] like Figure 4-Figure 5 As shown, the adsorption filler filter includes a plurality of adsorption filler installation chambers 141 horizontally spaced apart in the upper part of the tower body 11, each of the plurality of adsorption filler installation chambers having an adsorption filler installation inlet and outlet 1411 and air-permeable walls 1412 located on both sides of the adsorption filler installation inlet and outlet 1411, the adsorption filler installation inlet and outlet 1411 extending to the side wall of the tower body 11 and being in a closed state during operation, the adsorption filler of the adsorption filler filter is installed in each adsorption filler installation chamber 141 through the corresponding adsorption filler installation inlet and outlet 1411, the upper and lower parts of the plurality of adsorption filler installation chambers 141 are respectively installed in the tower body 11 through an upper support plate 142 and a lower support plate 143, air inlets are spaced apart on the lower support plate 143, and exhaust ports are spaced apart on the upper support plate 142, and these air inlets and exhaust ports are staggered so that the gas entering from each air inlet passes through the air-permeable walls 1412 on both sides of the corresponding adsorption filler installation chamber 141 and the adsorption filler between them and then is discharged from the corresponding exhaust port.

[0041] The structural design of the above-mentioned adsorption filler filter has many advantages. First, a plurality of horizontally spaced adsorption filler installation chambers 141 provide a larger filtration area, increase the contact opportunities between the gas and the adsorption filler, and thus improve the filtration efficiency. Secondly, the adsorption filler installation inlet and outlet 1411 equipped with each adsorption filler installation chamber 141 facilitates the replacement and maintenance of the filler, greatly improving the convenience of operation; the design of the air-permeable wall 1412 ensures that the gas can pass through the adsorption filler evenly, avoiding the phenomenon of air flow short-circuiting. The design of the upper support plate 142 and the lower support plate 143 not only provides a stable structural support, but also optimizes the airflow path through the distribution of the air inlet and exhaust ports. In addition, the staggered setting of the air inlet and exhaust port forces the airflow to pass through the adsorption filler, maximizing the filtration effect. This modular and maintainable design not only improves the filtration efficiency and extends the service life of the filler, but also facilitates daily maintenance and replacement operations. It is an ingenious design that takes into account both performance and practicality.

[0042] In this embodiment, the flue gas purification equipment further includes a liquid replenishing tank located beside the tower body 11, and a communicating vessel is formed between the liquid replenishing tank and the tower body 11 so that the liquid level of the absorption liquid in the liquid replenishing tank is the same as the liquid level of the absorption liquid in the tower body. When replenishing liquid through the liquid replenishing tank, a liquid replenishing delivery pump is not required, there are fewer accident maintenance points, and there is basically no energy consumption.

[0043] In this embodiment, when the above flue gas purification equipment is used, the gas inlet 111 to be purified is connected to the output source of ultrasonic kerosene cleaning waste gas. In addition, the purified gas outlet is connected to a fan. The purified gas is finally sent to the chimney through the fan for discharge.

[0044] The above is a description of the relevant contents of the present invention. A person skilled in the art will be able to implement the present invention based on these descriptions. Based on the above contents of this specification, all other embodiments obtained by a person skilled in the art without making any creative work shall fall within the scope of patent protection.

Claims

1. A flue gas purification device, comprising a pollutant absorption device, wherein the pollutant absorption device is arranged at the lower part of a tower body having an inlet for gas to be purified and an outlet for purified gas, Features: The pollutant absorption device comprises: An upper baffle, which is arranged in the tower body and close to the lower part of the tower body, and is used to divide the lower part of the tower body into an upper chamber and a lower chamber; A lower partition, the lower partition is arranged below the upper partition and divides the lower chamber into a lower upper chamber and a lower lower chamber, and a through hole is opened on the lower partition to connect the lower upper chamber with the lower lower chamber; An air inlet pipe, the inlet of which is arranged on the side wall of the tower body as the inlet of the gas to be purified, and the outlet of which penetrates the upper baffle plate and communicates with the lower upper chamber; An absorption liquid conduit tube group, the absorption liquid conduit tube group is composed of a plurality of absorption liquid conduits distributed on the upper partition plate and the lower partition plate, connecting the upper chamber and the lower chamber to each other, and a liquid collecting component is provided at the upper end of each absorption liquid conduit; An airflow duct assembly, the airflow duct assembly consisting of a plurality of airflow ducts distributed on the upper baffle and the lower baffle to connect the upper chamber and the lower chamber to each other; An absorption liquid is contained in the lower part of the tower body and can generate foam under the impact of airflow. The absorption liquid and the foam generated by the absorption liquid can absorb pollutants in the gas to be purified; The height of the lower ends of the plurality of absorption liquid conduits is lower than the height of the lower ends of the plurality of air flow conduits, so that the lower ends of the plurality of air flow conduits are always inserted into the absorption liquid in the lower chamber; The plurality of airflow ducts are provided with a spoiler structure inside; During operation, the gas to be purified enters the air inlet pipe from the gas inlet to be purified, then flows from the air inlet pipe from top to bottom and impacts the absorption liquid in the lower upper chamber, the gases continue to flow downward to the lower end of each air flow duct, and then move upward through each air flow duct, the gas flowing out from the upper end of each air flow duct is fully in contact with the foam gushing out from the upper end of each air flow duct, at the same time, the liquid gathered by the foam in the upper chamber is collected by the liquid collecting component and returned to the absorption liquid, and the purified gas flows out from the upper chamber again.

2. A flue gas purification device as claimed in claim 1, Features: It also includes an airflow demisting device, which is arranged in the tower body and located above the pollutant absorbing device.

3. A flue gas purification device as claimed in claim 2, Features: It also includes a smoke filtering device, which is arranged at the upper part of the tower body, and the airflow demisting device is located between the pollutant absorption device and the smoke filtering device; the upper part of the tower body is provided with the purified gas outlet which is connected to the exhaust port of the smoke filtering device.

4. A flue gas purification device as claimed in claim 3, Features: The smoke filtering device is provided with an adsorption filler filter.

5. A flue gas purification device as claimed in claim 4, Features: The adsorption filler filter uses activated carbon as the adsorption filler.

6. A flue gas purification device as claimed in claim 4, Features: The adsorption filler filter comprises a plurality of adsorption filler installation chambers horizontally spaced apart in the upper part of the tower body, each of the plurality of adsorption filler installation chambers having an adsorption filler installation inlet and outlet and air-permeable walls on both sides of the adsorption filler installation inlet and outlet, the adsorption filler installation inlet and outlet extending to the side wall of the tower body and being in a closed state during operation, the adsorption filler of the adsorption filler filter being installed in each adsorption filler installation chamber through the corresponding adsorption filler installation inlet and outlet, the upper and lower parts of the plurality of adsorption filler installation chambers being respectively installed in the tower body through an upper support plate and a lower support plate, the air inlets being spaced apart on the lower support plate, the exhaust ports being spaced apart on the upper support plate, the air inlets and the exhaust ports being staggered so that the gas entering from each air inlet passes through the air-permeable walls on both sides of the corresponding adsorption filler installation chamber and the adsorption filler between them and then is discharged from the corresponding exhaust port.

7. A flue gas purification device as claimed in claim 2, Features: The airflow demister device adopts a baffle demister.

8. A flue gas purification device according to any one of claims 1 to 7, Features: It also includes a liquid replenishing tank located beside the tower body, and a communicating vessel is formed between the liquid replenishing tank and the tower body so that the liquid level of the absorption liquid in the liquid replenishing tank is the same as the liquid level of the absorption liquid in the tower body.

9. A flue gas purification device according to any one of claims 1 to 7, Features: The liquid collecting component is a liquid collecting funnel; and / or the spoiler structure is a rhombus-shaped protrusion structure arranged in an array on the inner wall of the airflow duct, and two sharp corners of the rhombus-shaped protrusion structure are parallel to the axial direction of the airflow duct.

10. A flue gas purification device according to any one of claims 1 to 7, Features: The inlet for the gas to be purified is connected to an output source of ultrasonic kerosene cleaning waste gas when in use.

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