A treatment device for filtering toxic and harmful gases

Abstract

The present invention relates to the technical field of gas filtering equipment, and in particular to a treatment device for filtering toxic and harmful gases, comprising a shell, wherein water is contained in the shell, the upper end surface of the shell is fixedly connected to a fourth fixed pipe, the lower end surface of the shell is fixedly connected to a third fixed pipe, and a first unidirectional device is installed on the third fixed pipe; when air is blown into the airbag, the airbag expands, thereby raising the water level of the filtered gas, and using water to absorb sulfur dioxide in the filtered gas by discharging the gas from bottom to top, thereby increasing the contact time between the gas and the water, thereby facilitating the absorption and filtration of sulfur dioxide in the gas by the water, and at the same time, the device can make the sulfur dioxide be fully absorbed into less water, thereby facilitating the subsequent treatment of sewage and being more environmentally friendly.

Description

Technical Field

[0001] The invention relates to the technical field of gas filtering equipment, and in particular to a processing device for filtering poisonous and harmful gases. Background Art

[0002] Sulfur dioxide is one of the main pollutants of air pollution. At the same time, sulfur dioxide is also a toxic and harmful gas. Chemical plants need to filter and treat toxic and harmful gases when discharging gases. Among them, filtering and treating sulfur dioxide in the gas is the top priority. Sulfur dioxide is easily soluble in water. Therefore, the conventional way to treat sulfur dioxide in the gas is to pass the gas into water and absorb the sulfur dioxide in the gas through water.

[0003] When gas is introduced into water and the water absorbs sulfur dioxide in the gas, the bubbles move from bottom to top under the action of buoyancy. Since the bubbles stay in the water for too short a time, the effect of using water to filter sulfur dioxide in the gas is not good. In order to facilitate the water to fully absorb sulfur dioxide in the gas, we propose a treatment device for filtering toxic and harmful gases. Summary of the invention

[0004] The purpose of the present invention is to solve the shortcomings of the prior art and to propose a treatment device for filtering toxic and harmful gases.

[0005] To achieve the above purpose, the technical solution adopted by the present invention is: a treatment device for filtering toxic and harmful gases, comprising a shell, the shell is filled with water, the upper end surface of the shell is fixedly connected with a fourth fixed pipe, the lower end surface of the shell is fixedly connected with a third fixed pipe, the third fixed pipe is installed with a first one-way valve, the lower end surface of the third fixed pipe is fixedly connected with a first connecting pipe, the other end of the first connecting pipe is fixedly connected with an air pump, the lower end surface of the shell is fixedly connected with a second fixed pipe, and the second fixed pipe is installed with a second sealing valve;

[0006] An expansion mechanism is provided in the shell, and the expansion mechanism is used to raise the height of the water in the shell;

[0007] A circulation mechanism is arranged on the right side of the shell, and the circulation mechanism is used for repeatedly passing the gas to be filtered into the water.

[0008] Preferably, the expansion mechanism includes an airbag, which is fixedly connected to the outer shell and is located in water. Three U-shaped holes are drilled on the inner wall of the outer shell, and U-shaped tubes are fixedly connected to the three U-shaped holes. One end of the three U-shaped tubes is fixedly connected to the airbag, and a piston assembly is provided on the upper side of the airbag, which is used to inflate the airbag.

[0009] Preferably, the piston assembly includes a circular plate, a sealing ring is clamped on the circumferential surface of the circular plate, a first rubber plate is clamped on the inner wall of the outer shell, the sealing ring is slidably connected to the first rubber plate, a through hole is drilled through the upper end surface of the circular plate, a sleeve is fixedly connected to the upper end surface of the circular plate, a sealing tube is slidably connected in the sleeve, the sealing tube is fixedly connected to the upper inner wall of the outer shell, and the sealing tube is connected to a fourth fixed tube, three air outlet holes are drilled on the circumferential surface of the sealing tube, and a driving component is provided between the circular plate and the outer shell, and the driving component is used to drive the circular plate to move up and down.

[0010] Preferably, the driving component includes an electric telescopic rod, which is fixedly connected to the upper end surface of the shell, and the output end of the electric telescopic rod is fixedly connected to a traction plate, and the lower end surface of the traction plate is fixedly connected to two push rods, and the circumferential surfaces of the two push rods are clamped with second rubber plates, and the upper end surface of the shell is penetrated by two circular holes, and the two second rubber plates are respectively slidably connected to the two circular holes, and the lower end surfaces of the two push rods are fixedly connected to the upper end surface of the circular plate, and a pressure release piece is provided on the shell, and the pressure release piece is used to release the pressure in the shell to assist the circular plate to reset downward.

[0011] Preferably, the pressure release member comprises a first fixed tube, the first fixed tube is fixedly connected to the upper end surface of the shell, and a first sealing valve is installed on the first fixed tube.

[0012] Preferably, the circulation mechanism includes a second connecting pipe, the second connecting pipe is fixedly connected to a fourth fixed pipe, the other end of the second connecting pipe is fixedly connected to a cylinder body, the lower end surface of the cylinder body is fixedly connected to an air inlet pipe of an air pump, a second one-way valve is installed on the second connecting pipe, the circumferential surface of the cylinder body is fixedly connected to a fifth fixed pipe, a third one-way valve is installed on the fifth fixed pipe, and a venting assembly is provided on the second connecting pipe, and the venting assembly is used to release treated gas.

[0013] Preferably, the deflation assembly includes a sixth fixed pipe, the sixth fixed pipe is fixedly connected to the surface of the second connecting pipe, and a third sealing valve is installed on the sixth fixed pipe.

[0014] Preferably, a metal cylinder is fixedly connected to the lower inner wall of the shell, the metal cylinder is communicated with the third fixed pipe, and a plurality of air distribution holes are drilled on the circumferential surface of the metal cylinder.

[0015] Preferably, a support plate is fixedly connected to the circumferential surfaces of the outer shell and the cylinder body, and four support legs are fixedly connected to the lower end surface of the support plate.

[0016] Preferably, the inner wall of the shell is fixedly connected with a first annular plate and a second annular plate in sequence from bottom to top, the second annular plate is located on the upper side of the three U-shaped holes, and the first annular plate is located between the circular plate and the airbag.

[0017] Compared with the prior art, the present invention has the following beneficial effects:

[0018] In this solution, the airbag expands when air is blown into the airbag, thereby raising the water level of the filtered gas. The gas is discharged from bottom to top and water is used to absorb the sulfur dioxide in the filtered gas, thereby increasing the contact time between the gas and water, thereby facilitating the absorption and filtration of the sulfur dioxide in the gas by the water. At the same time, this device can make the sulfur dioxide be fully absorbed into less water, thereby reducing the difficulty of subsequent sewage treatment and being more environmentally friendly.

[0019] In this solution, the gas to be treated is repeatedly passed into water for filtration through a circulation mechanism, thereby further increasing the contact time between the gas and water, which is further beneficial to the water filtering and absorbing sulfur dioxide in the gas.

[0020] In this scheme, large bubbles are divided into multiple small bubbles through pores, and the contact area between gas and water is increased to facilitate full contact between gas and water, thereby further facilitating full absorption and filtration of sulfur dioxide by water. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 A perspective view of the present invention;

[0022] Figure 2 is a three-dimensional cross-sectional view of the present invention;

[0023] Figure 3 for Figure 2 A magnified image of point A;

[0024] Figure 4 for Figure 2 The enlarged view of point B;

[0025] Figure 5 It is a three-dimensional exploded view of the sleeve of the present invention;

[0026] Figure 6 A three-dimensional diagram of a U-shaped tube of the present invention;

[0027] Figure 7 It is a partial stereoscopic view of the push rod of the present invention.

[0028] In the figure: 1, housing; 101, first fixed pipe; 102, first sealing valve; 103, second fixed pipe; 104, second sealing valve; 105, third fixed pipe; 106, first non-return valve; 107, first connecting pipe; 108, air pump; 109, fourth fixed pipe; 2, circular plate; 201, sleeve; 202, sealing pipe; 203, through hole; 204, sealing ring; 205, first rubber plate; 206, sixth fixed pipe; 207, air outlet; 208, push rod; 209, second rubber plate; 2010, third sealing valve; 2011, electric telescopic rod; 2012, traction plate; 3, airbag; 301, U-shaped hole; 302, U-shaped tube; 4, second connecting tube; 401, second one-way valve; 402, cylinder body; 403, fifth fixed tube; 404, third one-way valve; 5, support plate; 501, support leg; 6, metal cylinder; 601, air distribution hole; 7, first annular plate; 701, second annular plate. DETAILED DESCRIPTION

[0029] The following description is used to disclose the present invention so that those skilled in the art can implement the present invention. The preferred embodiments described below are only examples, and those skilled in the art may think of other obvious variations.

[0030] Please refer to Figures 1 to 7 A toxic and harmful gas filtering treatment device shown in the figure comprises a housing 1, the housing 1 is filled with water, the upper end surface of the housing 1 is fixedly connected with a fourth fixed pipe 109, the lower end surface of the housing 1 is fixedly connected with a third fixed pipe 105, the third fixed pipe 105 is installed with a first one-way valve 106, the lower end surface of the third fixed pipe 105 is fixedly connected with a first connecting pipe 107, the other end of the first connecting pipe 107 is fixedly connected with an air pump 108, the lower end surface of the housing 1 is fixedly connected with a second fixed pipe 103, and the second fixed pipe 103 is installed with a second sealing valve 104;

[0031] An expansion mechanism is provided in the housing 1, and the expansion mechanism is used to raise the height of the water in the housing 1;

[0032] A circulation mechanism is arranged on the right side of the housing 1, and the circulation mechanism is used to repeatedly pass the gas to be filtered into the water.

[0033] The specific implementation is as follows. When the device needs to be used to filter sulfur dioxide in the treated gas, the second sealing valve 104 is opened, and water is injected into the second fixed pipe 103. The water in the second fixed pipe 103 enters the shell 1. After the water injection is completed, the second sealing valve 104 is closed, the fourth fixed pipe 109 is sealed, and the expansion mechanism is opened to raise the water level in the shell 1. After the liquid level rises, the expansion mechanism is closed, and then the air inlet pipe of the suction pump 108 is connected to the container of the gas to be treated, and the suction pump 108 is turned on. The suction pump 108 draws the gas to be treated into the first connecting pipe 107. The gas in the first connecting pipe 107 enters the shell 1 through the first one-way valve 106. By setting the first one-way valve 106, the gas in the first connecting pipe 107 can enter the shell 1, and the shell 1 Water and gas will not flow back into the first connecting pipe 107. The gas entering the outer shell 1 contacts the water in the outer shell 1 to absorb the sulfur dioxide in the gas. By raising the water level, the sulfur dioxide in the gas is absorbed in higher water. By increasing the liquid level, the contact time between the gas and water is increased, which makes it easier for the water to absorb the sulfur dioxide in the gas. At the same time, it is easy to fully use less water to filter and treat the gas, which is convenient for subsequent sewage treatment and more environmentally friendly. The gas filtered by water contacts the water again through the circulation mechanism, and the gas is repeatedly filtered, thereby further increasing the contact time between water and gas, and further facilitating the absorption and filtration of sulfur dioxide in the gas. After the sulfur dioxide concentration in the gas reaches the emission standard, the filtered gas can be discharged and collected.

[0034] As an embodiment of the present invention, the expansion mechanism includes an airbag 3, which is fixedly connected to the shell 1 and is located in water. The inner wall of the shell 1 is provided with three U-shaped holes 301, each of which is fixedly connected to a U-shaped tube 302, and one end of each of the three U-shaped tubes 302 is fixedly connected to the airbag 3. A piston assembly is provided on the upper side of the airbag 3, and the piston assembly is used to inflate the airbag 3.

[0035] The piston assembly includes a circular plate 2, a sealing ring 204 is clamped on the circumferential surface of the circular plate 2, a first rubber plate 205 is clamped on the inner wall of the shell 1, the sealing ring 204 is slidably connected to the first rubber plate 205, a through hole 203 is drilled through the upper end surface of the circular plate 2, a sleeve 201 is fixedly connected to the upper end surface of the circular plate 2, a sealing tube 202 is slidably connected in the sleeve 201, the sealing tube 202 is fixedly connected to the upper inner wall of the shell 1, and the sealing tube 202 is connected to the fourth fixed tube 109, and three air outlet holes 207 are drilled on the circumferential surface of the sealing tube 202, and a driving component is arranged between the circular plate 2 and the shell 1, and the driving component is used to drive the circular plate 2 to move up and down;

[0036] The driving component includes an electric telescopic rod 2011, which is fixedly connected to the upper end surface of the housing 1. The output end of the electric telescopic rod 2011 is fixedly connected to a traction plate 2012. The lower end surface of the traction plate 2012 is fixedly connected to two push rods 208. The circumferential surfaces of the two push rods 208 are clamped with second rubber plates 209. Two circular holes are drilled through the upper end surface of the housing 1. The two second rubber plates 209 are respectively slidably connected to the two circular holes. The lower end surfaces of the two push rods 208 are fixedly connected to the upper end surface of the circular plate 2. A pressure release member is provided on the housing 1. The pressure release member is used to release the pressure in the housing 1 to assist the circular plate 2 to reset downward;

[0037] The pressure release member comprises a first fixed pipe 101 . The first fixed pipe 101 is fixedly connected to the upper end surface of the housing 1 . A first sealing valve 102 is installed on the first fixed pipe 101 .

[0038] The specific implementation is as follows: when the expansion mechanism needs to be opened, the fourth fixed tube 109 is sealed, the electric telescopic rod 2011 is opened, the output end of the electric telescopic rod 2011 is extended to drive the traction plate 2012 and the two push rods 208 to move upward, and the push rod 208 drives the circular plate 2 to move upward in the shell 1. Since the air outlet 207 is blocked and sealed by the sleeve 201, the upper and lower spaces in the sealed shell 1 are separated by the circular plate 2, and the air between the circular plate 2 and the upper inner wall of the shell 1 is squeezed through the U-shaped tube 302 into the airbag 3, so that the expansion volume of the airbag 3 becomes larger. Since the airbag 3 is located outside the water, the airbag 3 is placed in the airbag 3. The circular plate 2 is formed on the side, so that the water is squeezed to the middle, thereby achieving the rise of the water level. When the circular plate 2 moves upward for a distance to make the airbag 3 fully inflated, the circumferential surface of the circular plate 2 covers the three U-shaped holes 301 on the sealed upper side, thereby achieving the sealing of the airbag 3 after inflation, which is beneficial to prevent the gas in the airbag 3 from escaping quickly in a short time and causing the water level to drop. At the same time, since the sealing tube 202 slides in the through hole 203, when the circular plate 2 seals the three U-shaped holes 301, the three air outlet holes 207 are located on the lower side of the circular plate 2, and the air on the lower side of the circular plate 2 enters the sealing tube 202 through the air outlet holes 207, from The filtered gas enters the fourth fixed pipe 109, and then the gas filtered for the first time enters the circulation mechanism for repeated filtration. When the sulfur dioxide in the gas is filtered and collected, the first sealing valve 102 is opened to connect the first fixed pipe 101 with the housing 1, and the electric telescopic rod 2011 is opened. The output end of the electric telescopic rod 2011 is shortened to drive the circular plate 2 to move downward, thereby preventing the negative pressure between the inner wall of the housing 1 and the circular plate 2 from causing the circular plate 2 to be difficult to move downward. The gas in the rear airbag 3 at the lower side of the circular plate 2 at the upper part of the U-shaped hole 301 enters through the U-shaped pipe 302. The air enters the housing 1 and is then discharged through the first fixed tube 101, so that it is convenient to inflate the airbag 3 when the device is used next time. Since the airbag 3 is elastic, the U-shaped hole 301 is sealed by the circular plate 2, and the airbag 3 will not be deflated and contracted quickly in a short period of time. However, after a long period of expansion, the gas in the airbag 3 will gradually decrease, so the water level will gradually drop. By ventilating the airbag 3 before filtering the gas each time and then deflating it after the filtering is completed, it is convenient for the airbag 3 to expand and raise the water level each time the device is used, and at the same time, it is prevented that the long-term expansion of the airbag 3 affects its elastic performance, so as to extend the service life of the airbag 3.

[0039] It is worth mentioning that the device is provided with a first rubber plate 205, a sealing ring 204 and a second rubber plate 209, which is beneficial to avoid leakage of gas in the shell 1 and also beneficial to the up and down movement of the circular plate 2 to inflate the airbag 3. The first rubber plate 205, the sealing ring 204, the second rubber plate 209 and the airbag 3 in the device are all made of EPDM rubber, which has excellent acid and alkali resistance, elasticity, sealing effect and anti-aging effect.

[0040] As an embodiment of the present invention, the circulation mechanism includes a second connecting pipe 4, the second connecting pipe 4 is fixedly connected to the fourth fixed pipe 109, the other end of the second connecting pipe 4 is fixedly connected to the cylinder 402, the lower end surface of the cylinder 402 is fixedly connected to the air inlet pipe of the air pump 108, the second connecting pipe 4 is installed with a second one-way valve 401, the circumferential surface of the cylinder 402 is fixedly connected to the fifth fixed pipe 403, the fifth fixed pipe 403 is installed with a third one-way valve 404, and the second connecting pipe 4 is provided with a degassing component, which is used to release the treated gas;

[0041] The deflation assembly includes a sixth fixed pipe 206 . The sixth fixed pipe 206 is fixedly connected to the surface of the second connecting pipe 4 . A third sealing valve 2010 is installed on the sixth fixed pipe 206 .

[0042] The specific implementation is as follows: after the gas is filtered by water for the first time, it enters the fourth fixed pipe 109, and the gas in the fourth fixed pipe 109 enters the cylinder 402 through the second connecting pipe 4, and then the gas in the cylinder 402 is sent to the water in the shell 1 for secondary filtration through the air pump 108, and the cycle is repeated, so that the gas to be treated in the cylinder 402 can be filtered multiple times, and the sulfur dioxide in the gas can be fully absorbed, which is further beneficial to increase the contact time between the gas and the water, and further beneficial to filter the sulfur dioxide in the gas. By setting the second one-way valve 401 allows the gas in the cylinder 402 through the second connecting pipe 4, and the gas in the cylinder 402 will not enter the second connecting pipe 4. By setting the third one-way valve 404, the gas in the fifth fixed pipe 403 can enter the cylinder 402, and the gas in the cylinder 402 will not enter the fifth fixed pipe 403. When the gas filtration is completed, the collection bottle is connected to the sixth fixed pipe 206, the third sealing valve 2010 is opened, and ordinary air is introduced into the fifth fixed pipe 403, so that the treated gas in the device is discharged for collection.

[0043] As an embodiment of the present invention, a metal cylinder 6 is fixedly connected to the lower inner wall of the housing 1 , the metal cylinder 6 is connected to the third fixed tube 105 , and a plurality of air distribution holes 601 are drilled on the circumferential surface of the metal cylinder 6 .

[0044] The specific implementation is as follows: when the gas enters the metal cylinder 6 through the third fixed tube 105, since a plurality of gas dividing holes 601 are provided on the metal cylinder 6 and the metal cylinder 6 is completely submerged in water, the large bubbles in the metal cylinder 6 are divided into a plurality of small bubbles by the gas dividing holes 601, thereby increasing the gas contact surface and improving the filtering and absorption effect of water on sulfur dioxide in the gas, thereby further improving the absorption and filtering effect on sulfur dioxide.

[0045] As an embodiment of the present invention, a support plate 5 is fixedly connected to the circumferential surface of the housing 1 and the cylinder body 402 , and four support legs 501 are fixedly connected to the lower end surface of the support plate 5 .

[0046] The specific implementation is as follows: the support plate 5 and the support legs 501 are provided to facilitate supporting the device, so that the device can stand in a workshop, and further facilitate conveying water and gas to be treated into the housing 1.

[0047] As an embodiment of the present invention, the inner wall of the shell 1 is fixedly connected with a first annular plate 7 and a second annular plate 701 in sequence from bottom to top. The second annular plate 701 is located on the upper side of the three U-shaped holes 301, and the first annular plate 7 is located between the circular plate 2 and the airbag 3.

[0048] The specific implementation is as follows: by setting the first annular plate 7 and the second annular plate 701, it is convenient to limit the circular plate 2 to prevent the circular plate 2 from moving downward and excessively squeezing the airbag 3. At the same time, it is convenient for the circular plate 2 to move upward and press against the lower end surface of the second annular plate 701, thereby facilitating the circular plate 2 to seal the three U-shaped holes 301.

[0049] Working principle of the present invention: when it is necessary to use the device to filter sulfur dioxide in the treated gas, open the second sealing valve 104, inject water into the second fixed pipe 103, and the water in the second fixed pipe 103 enters the shell 1. After the water injection is completed, close the second sealing valve 104, seal the fourth fixed pipe 109, open the expansion mechanism to raise the water level in the shell 1, and close the expansion mechanism after the liquid level rises. Then connect the air inlet pipe of the vacuum pump 108 to the container of the gas to be treated, turn on the vacuum pump 108, and the vacuum pump 108 will pump the gas to be treated into the first connecting pipe 107. The gas in the first connecting pipe 107 enters the shell 1 through the first one-way valve 106. By setting the first one-way valve 106, the gas in the first connecting pipe 107 can enter the shell 1, and the shell 1 Water and gas will not flow back into the first connecting pipe 107. The gas entering the outer shell 1 contacts the water in the outer shell 1 to absorb the sulfur dioxide in the gas. By raising the water level, the sulfur dioxide in the gas is absorbed in higher water. By increasing the liquid level, the contact time between the gas and water is increased, which makes it easier for the water to absorb the sulfur dioxide in the gas. At the same time, it is easy to fully use less water to filter and treat the gas, which is convenient for subsequent sewage treatment and more environmentally friendly. The gas filtered by water contacts the water again through the circulation mechanism, and the gas is repeatedly filtered, thereby further increasing the contact time between water and gas, and further facilitating the absorption and filtration of sulfur dioxide in the gas. After the sulfur dioxide concentration in the gas reaches the emission standard, the filtered gas can be discharged and collected.

[0050] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments, and the above embodiments and descriptions only describe the principles of the present invention. The present invention may have various changes and improvements without departing from the spirit and scope of the present invention, and these changes and improvements fall within the scope of the present invention to be protected, and the scope of protection claimed by the present invention is defined by the attached claims and their equivalents.

Claims

1. A toxic and harmful gas filtering and processing device, comprising a housing (1), characterized in that: The housing (1) contains water; the upper end surface of the housing (1) is fixedly connected to a fourth fixed pipe (109); the lower end surface of the housing (1) is fixedly connected to a third fixed pipe (105); the third fixed pipe (105) is installed with a first one-way valve (106); the lower end surface of the third fixed pipe (105) is fixedly connected to a first connecting pipe (107); the other end of the first connecting pipe (107) is fixedly connected to an air pump (108); the lower end surface of the housing (1) is fixedly connected to a second fixed pipe (103); the second fixed pipe (103) is installed with a second sealing valve (104); An expansion mechanism is provided in the outer shell (1), and the expansion mechanism is used to raise the height of water in the outer shell (1); A circulation mechanism is provided on the right side of the housing (1), and the circulation mechanism is used to repeatedly pass the gas to be filtered into the water; The expansion mechanism comprises an airbag (3), the airbag (3) being fixedly connected to the shell (1), and the airbag (3) being located in water, the inner wall of the shell (1) being provided with three U-shaped holes (301), the three U-shaped holes (301) being fixedly connected to a U-shaped tube (302), one end of the three U-shaped tubes (302) being fixedly connected to the airbag (3), and a piston assembly being provided on the upper side of the airbag (3), the piston assembly being used to inflate air into the airbag (3); The piston assembly comprises a circular plate (2), a sealing ring (204) is clamped on the circumferential surface of the circular plate (2), a first rubber plate (205) is clamped on the inner wall of the outer shell (1), the sealing ring (204) is slidably connected to the first rubber plate (205), a through hole (203) is drilled through the upper end surface of the circular plate (2), a sleeve (201) is fixedly connected to the upper end surface of the circular plate (2), a sealing tube (202) is slidably connected inside the sleeve (201), the sealing tube (202) is fixedly connected to the upper inner wall of the outer shell (1), and the sealing tube (202) is connected to a fourth fixed tube (109), and three air outlet holes (207) are drilled on the circumferential surface of the sealing tube (202), and a driving component is provided between the circular plate (2) and the outer shell (1), and the driving component is used to drive the circular plate (2) to move up and down; The driving component comprises an electric telescopic rod (2011), the electric telescopic rod (2011) being fixedly connected to the upper end surface of the housing (1), the output end of the electric telescopic rod (2011) being fixedly connected to a traction plate (212), the lower end surface of the traction plate (2012) being fixedly connected to two push rods (208), the circumferential surfaces of the two push rods (208) being clamped with a second rubber plate (209), the upper end surface of the housing (1) being penetrated by two circular holes, the two second rubber plates (209) being slidably connected to the two circular holes respectively, the lower end surfaces of the two push rods (208) being fixedly connected to the upper end surface of the circular plate (2), and the housing (1) being provided with a pressure release member, the pressure release member being used to release the pressure in the housing (1) to assist the circular plate (2) in returning to its original position and moving downward; The pressure relief member comprises a first fixed tube (101), the first fixed tube (101) being fixedly connected to the upper end surface of the housing (1), and a first sealing valve (102) being installed on the first fixed tube (101); The circulation mechanism comprises a second connecting pipe (4), the second connecting pipe (4) being fixedly connected to a fourth fixed pipe (109), the other end of the second connecting pipe (4) being fixedly connected to a cylinder body (402), the lower end surface of the cylinder body (402) being fixedly connected to an air inlet pipe of an air pump (108), a second one-way valve (401) being installed on the second connecting pipe (4), a fifth fixed pipe (403) being fixedly connected to a circumferential surface of the cylinder body (402), a third one-way valve (404) being installed on the fifth fixed pipe (403), and a degassing assembly being provided on the second connecting pipe (4), the degassing assembly being used to release treated gas.

2. A toxic and harmful gas filtering and processing device according to claim 1, characterized in that: The deflation assembly comprises a sixth fixed pipe (206), the sixth fixed pipe (206) being fixedly connected to the surface of the second connecting pipe (4), and a third sealing valve (2010) being installed on the sixth fixed pipe (206).

3. A toxic and harmful gas filtering and processing device according to claim 1, characterized in that: A metal cylinder (6) is fixedly connected to the lower inner wall of the outer shell (1); the metal cylinder (6) is in communication with the third fixed tube (105); and a plurality of air distribution holes (601) are bored on the circumferential surface of the metal cylinder (6).

4. A toxic and harmful gas filtering and processing device according to claim 1, characterized in that: A support plate (5) is fixedly connected to the circumferential surfaces of the outer shell (1) and the cylinder body (402), and four support legs (501) are fixedly connected to the lower end surface of the support plate (5).

5. A toxic and harmful gas filtering and processing device according to claim 1, characterized in that: The inner wall of the housing (1) is fixedly connected with a first annular plate (7) and a second annular plate (701) in sequence from bottom to top, the second annular plate (701) is located on the upper side of the three U-shaped holes (301), and the first annular plate (7) is located between the circular plate (2) and the airbag (3).

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