Exhaust gas purification treatment device and method thereof

Abstract

The invention discloses a waste gas purification treatment device and method, the treatment device comprises a primary purification tower and a secondary purification tower, the gas inlet of the secondary purification tower is connected with the gas outlet of the primary purification tower; an ozone purification area, an activated carbon adsorption area and an SDG adsorption area are arranged in the primary purification tower from top to bottom; a liquid inlet of the secondary purification tower is connected with a liquid storage tank through an infusion pump, a liquid distributor, a filler and a splitter plate are arranged in the secondary purification tower, the liquid distributor is connected with the liquid inlet, flow guide pipes are uniformly distributed on the bottom surface of the splitter plate, and an activated carbon adsorption layer is arranged on the inner wall of each flow guide pipe; the waste gas purification treatment method comprises the following steps: (a) arranging the purification tower; (b) purification by a primary purification tower; and (c) purifying in a secondary purifying tower. Multiple purification measures are adopted, various volatile organic compounds, pollutants, acid gas and malodorous gas in waste gas are effectively removed, the purification effect is good, and waste gas emission pollution is small.

Description

Technical Field

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

[0002] A large amount of waste gas will be generated during industrial production. Direct discharge of waste gas will pollute the atmosphere, lead to deterioration of air quality, and cause serious harm to human health and the environment. Therefore, the waste gas needs to be purified.

[0003] The traditional method of exhaust gas treatment is to pass the exhaust gas into the exhaust gas treatment device, filter it from one end and flow it to the next end, or even bypass the filter section and discharge it directly. This makes it difficult for the exhaust gas to fully contact and mix with the adsorbent during the flow process, and the exhaust gas is prone to backflow during the flow and re-enter the environment. Pollutants are easily retained and the treatment effect is not ideal.

[0004] The existing patent document (publication number: CN206121516U) discloses "an organic pollutant waste gas treatment device", which also has the above-mentioned technical problems. Summary of the invention

[0005] The purpose of the present invention is to solve the above-mentioned technical problems existing in the prior art and to provide an exhaust gas purification treatment device and method thereof.

[0006] In order to solve the above technical problems, the present invention adopts the following technical solutions:

[0007] The waste gas purification treatment device comprises: a primary purification tower and a secondary purification tower, wherein the air inlet of the secondary purification tower is connected to the air outlet of the primary purification tower; the device is characterized in that: an ozone purification zone, an activated carbon adsorption zone and an SDG adsorption zone are arranged from top to bottom in the primary purification tower, an ozone generator is arranged outside the primary purification tower, the ozone outlet of the ozone generator is connected to the ozone purification zone, a folding baffle is horizontally distributed in the activated carbon adsorption zone, an activated carbon adsorption plate is arranged on the surface of the folding baffle, a mesh cover is arranged in the SDG adsorption zone, and SDG adsorbent is filled between the upper and lower mesh covers;

[0008] The liquid inlet of the secondary purification tower is connected to the liquid storage tank through a liquid pump. The secondary purification tower is equipped with a liquid distributor, a filler and a diverter plate. The liquid distributor is located above the filler, the liquid distributor is connected to the liquid inlet, the filler is located above the diverter plate, and the bottom surface of the diverter plate is evenly distributed with guide pipes, and the inner wall of the guide pipe is provided with an activated carbon adsorption layer. The treatment device has a novel structure, adopts multiple purification measures, has a good purification effect, and has low waste gas emission pollution.

[0009] Furthermore, the first-stage purification tower includes a support frame, an air intake section, an ozone purification section, an activated carbon adsorption section and an SDG adsorption section. The inner cavity of the ozone purification section is the ozone purification zone, the inner cavity of the activated carbon adsorption section is the activated carbon adsorption zone, and the inner cavity of the SDG adsorption section is the SDG adsorption zone. The ozone purification section is fixed on the support frame, the air intake section is sleeved on the bottom of the ozone purification section, a support assembly is provided on the support frame, and the support assembly provides bottom support for the air intake section, the activated carbon adsorption section is sleeved on the top of the ozone purification section, and the SDG adsorption section is sleeved on the top of the activated carbon adsorption section.

[0010] Furthermore, baffles are longitudinally distributed in the ozone purification section, which can prevent the exhaust gas from rising smoothly, thereby extending the residence time of the exhaust gas in the ozone purification area, and further improving the purification effect of ozone on the exhaust gas.

[0011] Furthermore, a throttle plate is provided above the baffle plate, and the exhaust gas can only pass through the throttle hole of the throttle plate, the flow volume is suddenly reduced, and the flow rate is slowed down, thereby extending the residence time of the exhaust gas in the ozone purification area, and further improving the purification effect of ozone on the exhaust gas.

[0012] Furthermore, the support assembly includes a bottom plate, a spring, a telescopic tube and a support plate. The spring and the telescopic tube are arranged between the bottom plate and the support plate. The spring is located in the telescopic tube. The support plate supports the bottom of the air intake section. The bottom plate is slidably connected to the crossbeam of the support frame. The support plate is pressed downward to squeeze the spring, and the support plate descends to provide installation space for the air intake section. When the air intake section is installed, the support plate is loosened, and the spring pushes the support plate upward to push the bottom of the air intake section upward to prevent the air intake section from falling off freely, so as to achieve limited fixation, high installation stability, simple support assembly structure, and strong practicality; the position of the support assembly can be adjusted by horizontal sliding to avoid the support assembly blocking the air intake section for disassembly and assembly operations, and the operation space is large and simple and convenient.

[0013] Furthermore, a mounting groove is provided on the inner wall of the activated carbon adsorption section, the mounting groove is communicated with the top surface of the activated carbon adsorption section, and a mounting protrusion corresponding to the mounting groove is provided on the side of the folding baffle. The mounting protrusion is embedded into the mounting groove from top to bottom to realize the rapid positioning of the folding baffle, which will not shake left and right, has high stability, is easy to disassemble, is convenient to replace, can be installed and used at any time, replaces the screw fixing method, and is labor-saving and convenient to operate.

[0014] Furthermore, a liquid redistributor is provided in the secondary purification tower, and the liquid redistributor is located between the upper and lower adjacent packings. The absorption liquid flowing down from the upper packing is redistributed by the liquid redistributor, so that the absorption liquid is evenly distributed on the packing below, thereby facilitating the exhaust gas to fully contact with the absorption liquid to improve the purification effect.

[0015] The waste gas purification method is characterized by comprising the following steps:

[0016] (a) Arrangement of purification tower:

[0017] The air intake section, ozone purification section, activated carbon adsorption section and SDG adsorption section are assembled to form a primary purification tower;

[0018] Start the liquid pump, which pumps the absorption liquid in the storage tank into the liquid inlet of the secondary purification tower. The absorption liquid enters the liquid distributor, which sprays the absorption liquid downward to distribute it on the packing below.

[0019] (b) Purification in the first-stage purification tower:

[0020] ① The waste gas enters from the air inlet at the bottom of the primary purification tower, and rises to the ozone purification area. The baffle blocks the waste gas from rising straight up, and the ozone and waste gas react with each other to purify the waste gas in the first stage;

[0021] ②Then the exhaust gas rises and flows through the throttle plate and enters the activated carbon adsorption area. The exhaust gas contacts and adsorbs the activated carbon adsorption plate on the folding baffle, and the exhaust gas is purified in the second level;

[0022] ③Then the waste gas rises to the SDG adsorption area, where the waste gas contacts and adsorbs the SDG adsorbent, and the waste gas is purified in three stages. The purified waste gas is discharged from the outlet at the top of the first-stage purification tower;

[0023] (c) Secondary purification tower purification:

[0024] ① The exhausted waste gas enters from the air inlet at the bottom of the secondary purification tower, rises to the guide pipe on the bottom of the diverter plate, and contacts and adsorbs with the activated carbon adsorption layer on the inner wall of the guide pipe, thus purifying the waste gas once;

[0025] ②Then the waste gas continues to rise, and the absorption liquid contacts and reacts with the waste gas on the filler to purify the waste gas for the second time. The purified waste gas is discharged from the outlet at the top of the secondary purification tower.

[0026] Furthermore, the assembly method in step (a) is as follows: the air inlet section is sleeved on the bottom of the ozone purification section, and then the support plate of the support assembly is pressed down to make it descend, and then the bottom plate of the support assembly is slid horizontally to drive the support plate to the bottom of the air inlet section, and the support plate is loosened, and the support plate is pushed upward to the bottom of the air inlet section to prevent the air inlet section from falling off freely;

[0027] The activated carbon adsorption section is sleeved on the top of the ozone purification section, and then the SDG adsorption section is sleeved on the top of the activated carbon adsorption section.

[0028] The present invention has the following beneficial effects due to the adoption of the above technical solution:

[0029] 1. The waste gas enters the primary purification tower and rises to the ozone purification area. In the ozone purification area, part of the volatile organic compounds in the waste gas are removed by ozone, and high-concentration pollutants are degraded, achieving primary purification. Then the waste gas rises to the activated carbon adsorption area. The folded baffle can block the smooth rise of the waste gas. Part of the volatile organic compounds, low-concentration pollutants, ozone and malodorous gases in the waste gas are adsorbed by the activated carbon on the activated carbon adsorption plate, achieving secondary purification. Then the waste gas rises to the SDG adsorption area, and the acidic gas in the waste gas is removed by the SDG adsorbent, achieving tertiary purification. After the purified waste gas is discharged, it enters the secondary purification tower. In the secondary purification tower, the waste gas rises and enters the diversion pipe to contact and adsorb with the activated carbon adsorption layer, removing the remaining volatile organic compounds, low-concentration pollutants and ozone in the waste gas. Then the waste gas continues to rise, and the absorption liquid contacts and reacts with the waste gas on the packing, removing the remaining sulfides, nitrogen oxides and malodorous gases in the waste gas. The purified waste gas is discharged.

[0030] 2. The primary purification tower can be disassembled, with low assembly difficulty. Each purification area can be cleaned separately, reducing the cleaning difficulty. It is also convenient to replace the activated carbon adsorption plate and SDG adsorbent, thus ensuring continuous purification ability. Each structural section can also be replaced separately to cope with wear phenomena, replacing the integral structure and reducing the maintenance cost. Brief Description of the Drawings

[0031] The present invention will be further described below with reference to the drawings:

[0032] Figure 1 is a schematic structural diagram of the waste gas purification treatment device in the present invention;

[0033] Figure 2 is Figure 1 the right view of;

[0034] Figure 3 is a schematic internal structure diagram of the primary purification tower in the present invention;

[0035] Figure 4 is a schematic structural diagram of the butt joint of the activated carbon adsorption section, ozone purification section and SDG adsorption section in the present invention;

[0036] Figure 5 is a schematic structural diagram of the connection between the activated carbon adsorption section and the folded baffle in the present invention;

[0037] Figure 6 is a schematic structural diagram of the connection between the ozone purification section and the throttle plate in the present invention;

[0038] Figure 7 is a schematic structural diagram of the support assembly in the present invention;

[0039] Figure 8 is a schematic structural diagram of the connection between the secondary purification tower and the liquid storage tank in the present invention;

[0040] Figure 9 This is a schematic structural diagram of the connection between the secondary purification tower and the flow dividing plate in the present invention.

[0041] In the figure: 1 - primary purification tower; 2 - support frame; 3 - intake section; 4 - ozone purification section; 5 - activated carbon adsorption section; 6 - SDG adsorption section; 7 - secondary purification tower; 8 - wire mesh cover; 9 - SDG adsorbent; 10 - folded baffle; 11 - activated carbon adsorption plate; 12 - ozone generator; 13 - liquid extraction pump; 14 - support assembly; 15 - bottom plate; 16 - telescopic pipe; 17 - support plate; 18 - installation groove; 19 - installation bump; 20 - baffle plate; 21 - throttle plate; 22 - liquid storage tank; 23 - liquid distributor; 24 - packing; 25 - liquid redistributor; 26 - flow dividing plate; 27 - diversion pipe; 28 - wire mesh demister. Detailed implementation manners

[0042] As Figures 1 to 9 shown, the waste gas purification treatment device in the present invention includes: a primary purification tower 1 and a secondary purification tower 7. The primary purification tower 1 includes a support frame 2, an intake section 3, an ozone purification section 4, an activated carbon adsorption section 5, and an SDG adsorption section 6. The SDG adsorption section 6 is sleeved on the top of the activated carbon adsorption section 5. A first collar corresponding to the top of the activated carbon adsorption section 5 is provided at the bottom of the SDG adsorption section 6. Under the action of gravity, the SDG adsorption section 6 will not freely detach from the activated carbon adsorption section 5. The inner cavity of the SDG adsorption section 6 is the SDG adsorption area. A wire mesh cover 8 is fixedly connected to the inner wall of the SDG adsorption section 6 by screws. The SDG adsorbent 9 is filled between the upper and lower wire mesh covers 8. The aperture of the wire mesh cover 8 is smaller than the particle size of the SDG adsorbent 9. The acidic gas in the waste gas is removed by the SDG adsorbent 9. The wire mesh cover 8 is detachable, which is convenient for replacing the adsorbent 9.

[0043] The activated carbon adsorption section 5 is sleeved on the top of the ozone purification section 4. A second collar corresponding to the top of the ozone purification section 4 is provided at the bottom of the activated carbon adsorption section 5. Under the action of gravity, the activated carbon adsorption section 5 will not freely detach from the ozone purification section 4.

[0044] The inner cavity of the activated carbon adsorption section 5 is the activated carbon adsorption area. Folded baffles 10 are horizontally distributed in the activated carbon adsorption section 5. The surface of the folded baffle 10 is provided with activated carbon adsorption plates 11. The folded baffle 10 can block the smooth rise of the waste gas, so that the waste gas is in full contact with the activated carbon adsorption plates 11, and part of the volatile organic compounds, low-concentration pollutants, and ozone in the waste gas are adsorbed by the activated carbon.

[0045] The ozone purification section 4 is fixed on the support frame 2. The inner cavity of the ozone purification section 4 is the ozone purification area. An ozone generator 12 is provided outside the ozone purification section 4. The ozone generator 12 is provided with an air inlet. The ozone outlet of the ozone generator 12 is communicated with the ozone purification area. The ozone generated by the ozone generator 12 is filled into the ozone purification area. Ozone is used to remove part of volatile organic matter in the exhaust gas and degrade high-concentration pollutants.

[0046] The air intake section 3 is sleeved on the bottom of the ozone purification section 4. A support assembly 14 is provided on the support frame 2. The support assembly 14 includes a base plate 15, a spring, a telescopic tube 16 and a support plate 17. The spring and the telescopic tube 16 are arranged between the base plate 15 and the support plate 17. The spring is located in the telescopic tube 16. The support assembly 14 supports the bottom of the air intake section 3 through the support plate 17.

[0047] The first-stage purification tower 1 is disassembled and has low assembly difficulty. Each purification area can be cleaned separately, which reduces the cleaning difficulty and is also convenient for replacing the activated carbon adsorption plate 11 and the SDG adsorbent 9, thereby ensuring continuous purification capacity. Each structural segment can also be replaced separately to cope with the loss phenomenon, replacing the integrated structure and reducing maintenance costs. When installing the air intake section 3, first squeeze the support plate 17 downward so that the support plate 17 squeezes the spring, and the support plate 17 descends to provide installation space for the air intake section 3. The air intake section 3 is sleeved on the bottom of the ozone purification section 4, and then the support plate 17 is loosened. The spring pushes the support plate 17 upward so that the support plate 17 pushes the bottom of the air intake section 3 upward to prevent the air intake section 3 from being separated from the ozone purification, thereby realizing the limited fixation of the air intake section 3, and the installation stability is high. The air intake section 3 is in close contact with the ozone purification section 4, and the sealing is good to avoid leakage at the connection between the two.

[0048] An installation groove 18 is provided on the inner wall of the activated carbon adsorption section 5 , and the installation groove 18 is communicated with the top surface of the activated carbon adsorption section 5 . A mounting protrusion 19 corresponding to the installation groove 18 is provided on the side surface of the folding baffle 10 .

[0049] The mounting protrusion 19 is embedded into the mounting groove 18 from top to bottom to realize the rapid positioning of the folding baffle 10 without shaking left and right. It has high stability, is easy to disassemble and replace, and can be used at any time after installation, replacing the screw fixing method, which is labor-saving and convenient to operate.

[0050] The bottom plate 15 is slidably connected between the two beams of the support frame 2, has high stability, and can slide to adjust the position of the support assembly 14 to prevent the support assembly 14 from blocking the air intake section 3 for disassembly and assembly operations. The operation space is large and simple and convenient.

[0051] Baffles 20 are longitudinally distributed in the ozone purification section 4. The baffles 20 can prevent the exhaust gas from rising smoothly, thereby extending the residence time of the exhaust gas in the ozone purification area, thereby improving the purification effect of ozone on the exhaust gas.

[0052] A throttle plate 21 is provided above the baffle plate 20. The exhaust gas can only pass through the throttle hole of the throttle plate 21, the flow rate is suddenly reduced, and the flow rate is slowed down, thereby extending the residence time of the exhaust gas in the ozone purification area, thereby improving the ozone purification effect on the exhaust gas.

[0053] The air inlet at the bottom of the secondary purification tower 7 is connected to the air outlet at the top of the primary purification tower 1. The liquid inlet of the secondary purification tower 7 is connected to the liquid storage tank 22 through the liquid pump 13. The liquid storage tank 22 is filled with absorption liquid, which is H2O2 solution, which can remove sulfides, nitrogen oxides and malodorous gases in the exhaust gas. A liquid distributor 23, a packing support plate, a packing 24, a liquid redistributor 25 and a diverter plate 26 are provided in the secondary purification tower 7. The packing support plate supports the packing 24, and the liquid distributor 23 is located above the packing 24. The liquid distributor 23 is connected to the liquid inlet of the secondary purification tower 7, and the packing 24 is located above the diverter plate 26. The liquid redistributor 25 is located between the upper and lower adjacent packings 24. The bottom surface of the diverter plate 26 is evenly distributed with guide pipes 27, and the guide pipes 27 are connected to the diverter holes of the diverter plate 26. An activated carbon adsorption layer is provided on the inner wall of the guide pipe 27.

[0054] After the waste gas enters the secondary purification tower 7, it rises to enter the guide pipe 27 and contacts and adsorbs with the activated carbon adsorption layer to remove the volatile organic compounds, low-concentration pollutants and ozone remaining in the waste gas. The contact area is large, the time is long, and the adsorption effect is good.

[0055] The liquid pump 13 draws the absorption liquid in the liquid storage tank 22 into the secondary purification tower 7, and evenly distributes it to the filler 24 below through the liquid distributor 23. The absorption liquid flowing down from the upper filler 24 is redistributed through the liquid redistributor 25, so that the absorption liquid is evenly distributed on the filler 24 below, thereby facilitating full contact between the exhaust gas and the absorption liquid to improve the purification effect.

[0056] A wire mesh demister 28 is provided at the inner top of the secondary purification tower 7 to remove liquid droplets and mist in the exhaust gas.

[0057] The waste gas purification method comprises the following steps:

[0058] (a) Arrange the purification tower: the air inlet section 3 is sleeved on the bottom of the ozone purification section 4, and then the support plate 17 of the support assembly 14 is pressed down to make it fall down, and then the bottom plate 5 of the support assembly 14 is slid horizontally to drive the support plate 17 to the bottom of the air inlet section 3, and the support plate 17 is loosened. The support plate 17 is supported upwards against the bottom of the air inlet section 3 to prevent the air inlet section 3 from falling off freely. The air inlet section 3 and the ozone purification section 4 are positioned and docked, which is efficient and convenient. The support assembly 14 effectively supports the air inlet section 3 to prevent it from falling off freely. The installation is reliable, replacing the welding or bolt connection method, and the operation is convenient.

[0059] The activated carbon adsorption section 5 is sleeved on the top of the ozone purification section 4, and then the SDG adsorption section 6 is sleeved on the top of the activated carbon adsorption section 5 to form the primary purification tower 1.

[0060] The assembly method has a simple process, is step - by - step and orderly, with positioning and docking, low operation difficulty, easy to control, and is efficient and convenient.

[0061] Start the liquid extraction pump 13. The liquid extraction pump 13 pumps the absorption liquid in the liquid storage tank 22 into the liquid inlet of the secondary purification tower 7. The absorption liquid enters the liquid distributor 23, and the absorption liquid is sprayed downward by the liquid distributor 23 to evenly distribute the absorption liquid on the packing 24 below.

[0062] (b) Purification by the primary purification tower 1:

[0063] ① The waste gas enters from the air inlet at the bottom of the primary purification tower 1 and rises to the ozone purification area. The baffle plate 20 blocks the straight - line rise of the waste gas, prolonging the residence time of the waste gas in the ozone purification area. Ozone reacts with the waste gas in contact, and the waste gas is purified at the primary level, removing some volatile organic compounds and high - concentration pollutants in the waste gas.

[0064] ② Then the waste gas rises and flows through the throttle plate 21 and enters the activated carbon adsorption area. The waste gas comes into contact and adsorption with the activated carbon adsorption plate 11 on the folded baffle 10, and the waste gas is purified at the secondary level, removing some volatile organic compounds, low - concentration pollutants and residual ozone in the waste gas.

[0065] ③ Then the waste gas rises to the SDG adsorption area. The waste gas comes into contact and adsorption with the SDG adsorbent 9, and the waste gas is purified at the tertiary level, removing the acidic gas in the waste gas. The purified waste gas is discharged from the air outlet at the top of the primary purification tower 1.

[0066] (c) Purification by the secondary purification tower 7:

[0067] ① The discharged waste gas enters from the air inlet at the bottom of the secondary purification tower 7, rises to enter the diversion pipe 27 on the bottom surface of the diversion plate 26, and comes into contact and adsorption with the activated carbon adsorption layer on the inner wall of the diversion pipe 27, and the waste gas is purified once, removing the residual volatile organic compounds, low - concentration pollutants and ozone in the waste gas.

[0068] ② Then the waste gas continues to rise, and the absorption liquid reacts with the waste gas in contact on the packing 24, and the waste gas is purified twice, removing the residual sulfides, nitrogen oxides and odor gases in the waste gas. The purified waste gas is discharged from the air outlet at the top of the secondary purification tower 7.

[0069] The above are only specific embodiments of the present invention, but the technical features of the present invention are not limited thereto. Any simple changes, equivalent substitutions, or modifications made based on the present invention to solve substantially the same technical problems and achieve substantially the same technical effects are all covered by the protection scope of the present invention.

Claims

1. Exhaust gas purification and treatment device, including: A primary purification tower and a secondary purification tower, wherein the air inlet of the secondary purification tower is connected to the air outlet of the primary purification tower; Features: The first-level purification tower is provided with an ozone purification area, an activated carbon adsorption area and an SDG adsorption area from top to bottom. An ozone generator is provided outside the first-level purification tower. The ozone outlet of the ozone generator is connected to the ozone purification area. Folding baffles are horizontally distributed in the activated carbon adsorption area. The surface of the folding baffle is provided with an activated carbon adsorption plate. A mesh cover is provided in the SDG adsorption area. The space between the upper and lower mesh covers is filled with SDG adsorbent. The liquid inlet of the secondary purification tower is connected to a liquid storage tank through a liquid pump. A liquid distributor, a filler and a diverter plate are arranged in the secondary purification tower. The liquid distributor is located above the filler. The liquid distributor is connected to the liquid inlet. The filler is located above the diverter plate. Guide pipes are evenly distributed on the bottom surface of the diverter plate, and an activated carbon adsorption layer is arranged on the inner wall of the guide pipe.

2. The exhaust gas purification device according to claim 1, characterized in that: The primary purification tower comprises a support frame, an air intake section, an ozone purification section, an activated carbon adsorption section and an SDG adsorption section. The inner cavity of the ozone purification section is the ozone purification zone, the inner cavity of the activated carbon adsorption section is the activated carbon adsorption zone, the inner cavity of the SDG adsorption section is the SDG adsorption zone, the ozone purification section is fixed on the support frame, the air intake section is sleeved on the bottom of the ozone purification section, a support assembly is provided on the support frame, and the support assembly provides bottom support for the air intake section, the activated carbon adsorption section is sleeved on the top of the ozone purification section, and the SDG adsorption section is sleeved on the top of the activated carbon adsorption section.

3. The exhaust gas purification device according to claim 2, characterized in that: Baffles are longitudinally distributed in the ozone purification section.

4. The exhaust gas purification device according to claim 3, characterized in that: A throttle plate is arranged above the baffle plate.

5. The exhaust gas purification device according to claim 2, characterized in that: The support assembly includes a base plate, a spring, a telescopic tube and a support plate. The spring and the telescopic tube are arranged between the base plate and the support plate. The spring is located in the telescopic tube. The support plate supports the bottom of the air intake section. The base plate is slidably connected to the crossbeam of the support frame.

6. The exhaust gas purification device according to claim 2, characterized in that: An installation groove is provided on the inner wall of the activated carbon adsorption section, and the installation groove is communicated with the top surface of the activated carbon adsorption section. A mounting protrusion corresponding to the installation groove is provided on the side surface of the folding baffle.

7. The exhaust gas purification device according to claim 1, characterized in that: A liquid redistributor is provided in the secondary purification tower, and the liquid redistributor is located between the upper and lower adjacent fillers.

8. A method for purifying waste gas, characterized in that The steps include: (a) Arrangement of purification tower: The air intake section, ozone purification section, activated carbon adsorption section and SDG adsorption section are assembled to form a primary purification tower; Start the liquid pump, which pumps the absorption liquid in the storage tank into the liquid inlet of the secondary purification tower. The absorption liquid enters the liquid distributor, which sprays the absorption liquid downward to distribute it on the packing below. (b) Purification in the first-stage purification tower: ① The waste gas enters from the air inlet at the bottom of the primary purification tower, and rises to the ozone purification area. The baffle blocks the waste gas from rising straight up, and the ozone and waste gas react with each other to purify the waste gas in the first stage; ②Then the exhaust gas rises and flows through the throttle plate and enters the activated carbon adsorption area. The exhaust gas contacts and adsorbs the activated carbon adsorption plate on the folding baffle, and the exhaust gas is purified in the second level; ③Then the waste gas rises to the SDG adsorption area, where the waste gas contacts and adsorbs the SDG adsorbent, and the waste gas is purified in three stages. The purified waste gas is discharged from the outlet at the top of the first-stage purification tower; (c) Secondary purification tower purification: ① The exhausted waste gas enters from the air inlet at the bottom of the secondary purification tower, rises to the guide pipe on the bottom of the diverter plate, and contacts and adsorbs with the activated carbon adsorption layer on the inner wall of the guide pipe, thus purifying the waste gas once; ②Then the waste gas continues to rise, and the absorption liquid contacts and reacts with the waste gas on the filler to purify the waste gas for the second time. The purified waste gas is discharged from the outlet at the top of the secondary purification tower.

9. The exhaust gas purification method according to claim 8, characterized in that: The assembly method in step (a) is as follows: the air inlet section is sleeved on the bottom of the ozone purification section, and then the support plate of the support assembly is pressed down to make it descend, and then the bottom plate of the support assembly is slid horizontally to drive the support plate to the bottom of the air inlet section, and the support plate is loosened, and the support plate is pushed upward against the bottom of the air inlet section to prevent the air inlet section from falling off freely; the activated carbon adsorption section is sleeved on the top of the ozone purification section, and then the SDG adsorption section is sleeved on the top of the activated carbon adsorption section.

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