A small exhaust gas treatment device

Abstract

The present invention discloses a small-sized waste gas treatment device, which belongs to the technical field of waste gas treatment, and comprises a filtering device, wherein the filtering device is used to filter large flocculent impurities in waste gas, and a liquid washing device and an adsorption device are arranged on the filtering device, wherein the liquid washing device is used to chemically treat organic matter and acidic substances in waste gas, and the adsorption device is used to adsorb harmful substances in waste gas. The filtering device arranged in the present invention can filter large flocculent impurities in waste gas, and treat organic matter, acidic substances, etc. in waste gas through the liquid washing device, and finally further treat the waste gas through the adsorption device before discharging, and the waste gas treatment effect is good; the filtering device arranged in the present invention is provided with an internal scraping mechanism and an external scraping mechanism, which can effectively clean the flocculent impurities remaining in the inner and outer surfaces of the filter cartridge and the holes, and prevent the filter cartridge from being blocked, thereby affecting the waste gas treatment effect.

Description

Technical Field

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

[0002] An exhaust gas treatment device is a device used to treat exhaust gas generated in industrial production or other processes. Its main purpose is to reduce or completely remove pollutants in the exhaust gas to ensure that the exhaust gas discharged meets environmental standards and regulatory requirements. The design and selection of exhaust gas treatment devices usually depend on the exhaust gas characteristics, treatment efficiency requirements, operating costs, and local environmental regulations. Effective exhaust gas treatment can significantly reduce the impact of industrial activities on the environment and protect air quality and public health. Exhaust gas treatment devices mainly use physical methods, chemical methods, and adsorption methods to perform multi-layer treatment of exhaust gas. The waste treatment device in the prior art usually takes the form of a treatment tower, which is very large and occupies a large area. At the same time, it is impossible to combine physical treatment, chemical treatment, and adsorption treatment. The treatment efficiency is average, and the filter cannot be self-cleaned. Summary of the invention

[0003] In view of the above technical problems, the technical solution adopted by the present invention is: a small-scale waste gas treatment device, including a filtering device, the filtering device including an inner treatment cylinder, the filtering device is used to filter large flocculent impurities in the waste gas, the filtering device is provided with a liquid washing device and an adsorption device, the liquid washing device includes a solution tank, the solution tank is fixedly mounted on the inner treatment cylinder, the liquid washing device is used to chemically treat organic matter and acidic substances in the waste gas, the adsorption device includes an upper connecting plate, the upper connecting plate is fixedly mounted on the inner treatment cylinder, and the adsorption device is used to adsorb harmful substances in the waste gas.

[0004] Furthermore, the filtering device includes a dust collecting plate rotatably mounted on the bottom of the inner processing cylinder, the dust collecting plate and the inner processing cylinder are rotatably mounted through threads, a connecting plate is fixedly mounted in the inner processing cylinder, a filter cylinder is fixedly mounted on the connecting plate, a top plate is fixedly mounted in the inner processing cylinder, a fixing ring is fixedly mounted on the filter cylinder, a motor cover and a dual-axis motor are fixedly mounted on the inner processing cylinder, an inner bevel gear and an outer bevel gear are respectively fixedly mounted on the two motor shafts of the dual-axis motor, an outer shaft is rotatably mounted on the motor cover, a transmission bevel gear and a lower gear are fixedly mounted on the outer shaft, the transmission bevel gear is meshed with the outer bevel gear, and a stop cap is fixedly mounted in the inner processing cylinder.

[0005] Furthermore, an internal scraping mechanism is provided on the top plate, and the internal scraping mechanism includes a central rotating shaft rotatably mounted on the top plate, a central bevel gear, a rotating frame and a rotating frame are fixedly mounted on the central rotating shaft, the central bevel gear is meshed with the internal bevel gear, two brush wheels are rotatably mounted on the rotating frame and the rotating frame, a brush wheel gear is fixedly mounted on the brush wheel, an internal gear ring is fixedly mounted on the inner wall of the filter cartridge, and the brush wheel gear is meshed with the internal gear ring.

[0006] Furthermore, an external scraping mechanism is provided on the fixed ring, and the external scraping mechanism includes an external gear rotatably mounted on the fixed ring, the external gear meshes with the lower gear, a scraper rod is fixedly mounted on the external gear, a scraper blade is fixedly mounted on the scraper rod, and the scraper blade fits the filter cartridge.

[0007] The bottom of the inner treatment cylinder is connected to the pipe for discharging waste gas externally. The waste gas enters the filter cylinder, and the large flocculent impurities are blocked by the filter cylinder and fall into the dust collecting tray. Then the waste gas enters between the filter cylinder and the inner treatment cylinder, and then enters the solution tank through the air inlet pipe.

[0008] The rotation of the double-axis motor drives the inner bevel gear and the outer bevel gear to rotate, thereby driving the center bevel gear and the center rotating shaft to rotate, thereby driving the rotating frame and the rotating frame to rotate, thereby driving the brush wheel and the brush wheel gear to rotate, and under the action of the inner ring gear, the brush wheel gear and the brush wheel are driven to rotate, thereby realizing the self-rotation of the brush wheel and the revolution around the center rotating shaft, and the flocculent impurities remaining on the inner wall and the hole of the filter cartridge are scraped off by the brush wheel, and the flocculent impurities fall into the dust collecting pan, and the outer bevel gear drives the transmission bevel gear, the outer shaft and the lower gear to rotate, thereby driving the outer rotating gear and the scraper rod to rotate, thereby driving the scraper blade to move along the outer wall of the filter cartridge, and the flocculent impurities remaining on the outer wall of the filter cartridge are scraped off by the scraper blade, and the flocculent impurities fall into the dust collecting pan to prevent the filter cartridge from being blocked.

[0009] Furthermore, the liquid washing device includes an air inlet pipe and an air outlet pipe fixedly installed on a solution tank, the solution tank is filled with a chemical solvent, the air inlet pipe is fixedly installed on the top of the inner treatment cylinder, a liquid level tube is fixedly installed on the solution tank, a scale is provided on the liquid level tube for observing the liquid level of the solvent in the solution tank, and a liquid inlet cover and a liquid outlet cover are provided on the solution tank, and the liquid inlet cover and the liquid outlet cover are respectively installed on the solution tank by threaded rotation.

[0010] Furthermore, the lower pipe opening of the air inlet pipe is located in the solvent, and the lower pipe opening of the air outlet pipe is located above the solvent liquid surface.

[0011] The waste gas enters the chemical solvent in the solution tank through the air inlet pipe, and the organic matter, acidic substances, etc. in the waste gas are removed by the chemical solvent, and then enters the adsorption cylinder through the air outlet pipe.

[0012] The liquid level height of the chemical solvent in the solution tank is observed through the liquid level tube. The chemical solvent can be added to the solution tank by opening the liquid inlet cover, and the chemical solvent in the solution tank can be discharged by opening the liquid outlet cover.

[0013] Furthermore, the adsorption device includes an adsorption cylinder fixedly installed on the upper connecting plate, the air outlet pipe is fixedly installed on the adsorption cylinder, a rain shield cap is fixedly installed on the adsorption cylinder, a filter is arranged in the adsorption cylinder, an adsorption spiral disk is fixedly installed in the adsorption cylinder, the adsorption spiral disk is spiral-shaped, a motor is fixedly installed in the adsorption cylinder, and a fan is fixedly installed on the motor shaft of the motor.

[0014] Furthermore, the adsorption spiral disk contains activated carbon, and a plurality of ventilation holes are arranged on the adsorption spiral disk.

[0015] The motor drives the fan to rotate, and the exhaust gas entering the adsorption cylinder is drawn upward. After being filtered by the filter, the exhaust gas reaches the adsorption spiral disk and rises along the adsorption spiral disk. The exhaust gas is fully adsorbed by the activated carbon in the adsorption spiral disk. Then the exhaust gas is discharged through the top of the adsorption cylinder. The rain cap is used to block rain and prevent rainwater from entering the adsorption cylinder.

[0016] Compared with the prior art, the beneficial effects of the present invention are as follows: (1) The filtering device provided in the present invention can filter large flocculent impurities in the exhaust gas, and treat organic matter, acidic substances, etc. in the exhaust gas through a liquid washing device, and finally discharge the exhaust gas after further treatment through an adsorption device, so that the exhaust gas treatment effect is good; (2) The filtering device provided in the present invention is provided with an internal scraping mechanism and an external scraping mechanism, which can effectively clean the flocculent impurities remaining on the inner and outer surfaces of the filter cartridge and in the holes, so as to prevent the filter cartridge from being blocked and affecting the exhaust gas treatment effect; (3) The adsorption device provided in the present invention is provided with a spiral adsorption spiral disk, which can increase the contact area for exhaust gas adsorption and improve the exhaust gas treatment efficiency. At the same time, when used with a fan, the treated exhaust gas can be better discharged. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the overall structure of the present invention.

[0018] Figure 2 The structure of the filter device of the present invention is shown in FIG. Figure 1 .

[0019] Figure 3 The structure of the filter device of the present invention is shown in FIG. Figure 2 .

[0020] Figure 4 It is a schematic diagram of the structure of the external scraping mechanism of the present invention.

[0021] Figure 5 It is a schematic diagram of the structure of the inner scraping mechanism of the present invention.

[0022] Figure 6 The structure of the liquid washing device of the present invention is shown in FIG. Figure 1 .

[0023] Figure 7 The structure of the liquid washing device of the present invention is shown in FIG. Figure 2 .

[0024] Figure 8 The structure of the adsorption device of the present invention is shown in FIG. Figure 1 .

[0025] Fig. 9 The structure of the adsorption device of the present invention is shown in FIG. Figure 2 .

[0026] Figure numbers: 101-inner treatment cylinder; 102-dust collecting plate; 103-top plate; 104-connecting plate; 105-motor cover; 106-double-shaft motor; 107-inner bevel gear; 108-outer bevel gear; 109-transmission bevel gear; 110-outer shaft; 111-lower gear; 112-filter cylinder; 113-outer rotating gear; 114-scraper rod; 115-scraper blade; 116-center bevel gear; 117-center rotating shaft; 118-brush Wheel; 119-brush wheel gear; 120-inner gear ring; 121-blocking cap; 122-rotating frame; 123-rotating frame; 124-fixing ring; 201-solution tank; 202-liquid inlet cover; 203-liquid outlet cover; 204-liquid level tube; 205-inlet pipe; 206-outlet pipe; 301-upper connecting plate; 302-adsorption cylinder; 303-rain shield cap; 304-adsorption spiral disk; 305-filter; 306-motor; 307-fan. DETAILED DESCRIPTION

[0027] The specific implementation of the present invention will be further described below in conjunction with the accompanying drawings.

[0028] Example: Reference Figure 1-Figure 9 A small-scale waste gas treatment device includes a filtering device, the filtering device includes an inner treatment cylinder 101, the filtering device is used to filter large flocculent impurities in the waste gas, the filtering device is provided with a liquid washing device and an adsorption device, the liquid washing device includes a solution tank 201, the solution tank 201 is fixedly mounted on the inner treatment cylinder 101, the liquid washing device is used to chemically treat organic matter and acidic substances in the waste gas, the adsorption device includes an upper connecting plate 301, the upper connecting plate 301 is fixedly mounted on the inner treatment cylinder 101, and the adsorption device is used to adsorb harmful substances in the waste gas.

[0029] like Figure 2-Figure 5As shown, the filtering device includes a dust collecting plate 102 rotatably mounted on the bottom of the inner processing cylinder 101, the dust collecting plate 102 and the inner processing cylinder 101 are rotatably mounted by threads, a connecting plate 104 is fixedly mounted in the inner processing cylinder 101, a filter cylinder 112 is fixedly mounted on the connecting plate 104, a top plate 103 is fixedly mounted in the inner processing cylinder 101, a fixing ring 124 is fixedly mounted on the filter cylinder 112, a motor cover 105 and a dual-axis motor 106 are fixedly mounted on the inner processing cylinder 101, an inner bevel gear 107 and an outer bevel gear 108 are respectively fixedly mounted on the two motor shafts of the dual-axis motor 106, an outer shaft 110 is rotatably mounted on the motor cover 105, a transmission bevel gear 109 and a lower gear 111 are fixedly mounted on the outer shaft 110, the transmission bevel gear 109 is meshed with the outer bevel gear 108, and a blocking cap 121 is fixedly mounted in the inner processing cylinder 101.

[0030] like Figure 2-Figure 5 As shown, an internal scraping mechanism is provided on the top plate 103, and the internal scraping mechanism includes a central rotating shaft 117 rotatably mounted on the top plate 103, a central bevel gear 116, a rotating frame 123 and a rotating frame 122 are fixedly mounted on the central rotating shaft 117, the central bevel gear 116 is meshed with the internal bevel gear 107, two brush wheels 118 are rotatably mounted on the rotating frame 123 and the rotating frame 122, a brush wheel gear 119 is fixedly mounted on the brush wheel 118, an inner gear ring 120 is fixedly mounted on the inner wall of the filter cartridge 112, and the brush wheel gear 119 is meshed with the inner gear ring 120.

[0031] like Figure 2-Figure 5 As shown, an external scraping mechanism is provided on the fixed ring 124, and the external scraping mechanism includes an external rotating gear 113 rotatably mounted on the fixed ring 124, the external rotating gear 113 is meshed with the lower gear 111, a scraper rod 114 is fixedly mounted on the external rotating gear 113, a scraper blade 115 is fixedly mounted on the scraper rod 114, and the scraper blade 115 is in contact with the filter cartridge 112.

[0032] The bottom of the inner treatment cylinder 101 is connected to the pipe for discharging waste gas externally. The waste gas enters the filter cylinder 112. The large flocculent impurities are blocked by the filter cylinder 112 and fall into the dust collecting pan 102. Then the waste gas enters between the filter cylinder 112 and the inner treatment cylinder 101, and then enters the solution tank 201 through the air inlet pipe 205.

[0033] The rotation of the dual-axis motor 106 drives the inner bevel gear 107 and the outer bevel gear 108 to rotate, thereby driving the central bevel gear 116 and the central rotating shaft 117 to rotate, thereby driving the rotating frame 123 and the rotating frame 122 to rotate, thereby driving the brush wheel 118 and the brush wheel gear 119 to rotate, and under the action of the inner gear ring 120, the brush wheel gear 119 and the brush wheel 118 are driven to rotate, thereby realizing the self-rotation of the brush wheel 118 and the revolution around the central rotating shaft 117, and the filter cartridge 11 is cleaned by the brush wheel 118. The flocculent impurities remaining on the inner wall and the hole are scraped off and fall into the dust collecting plate 102. The outer bevel gear 108 drives the transmission bevel gear 109, the outer shaft 110 and the lower gear 111 to rotate, thereby driving the outer rotating gear 113 and the scraper rod 114 to rotate, thereby driving the scraper blade 115 to move along the outer wall of the filter cylinder 112. The flocculent impurities remaining on the outer wall of the filter cylinder 112 are scraped off by the scraper blade 115 and fall into the dust collecting plate 102 to prevent the filter cylinder 112 from being blocked.

[0034] like Figure 6 , Figure 7 As shown, the liquid washing device includes an air inlet pipe 205 and an air outlet pipe 206 fixedly mounted on a solution tank 201. The solution tank 201 is filled with a chemical solvent. The air inlet pipe 205 is fixedly mounted on the top of the inner treatment cylinder 101. A liquid level tube 204 is fixedly mounted on the solution tank 201. The liquid level tube 204 is provided with a scale for observing the liquid level of the solvent in the solution tank 201. The solution tank 201 is provided with a liquid inlet cover 202 and a liquid outlet cover 203. The liquid inlet cover 202 and the liquid outlet cover 203 are respectively mounted on the solution tank 201 by threaded rotation.

[0035] like Figure 6 , Figure 7 As shown, the lower pipe opening of the air inlet pipe 205 is located in the solvent, and the lower pipe opening of the air outlet pipe 206 is located above the solvent liquid surface.

[0036] The waste gas enters the chemical solvent in the solution tank 201 through the air inlet pipe 205 , and the organic matter, acidic substances, etc. in the waste gas are removed by the chemical solvent. Then, the waste gas enters the adsorption cylinder 302 through the air outlet pipe 206 .

[0037] The liquid level of the chemical solvent in the solution tank 201 is observed through the liquid level tube 204 , the chemical solvent can be added to the solution tank 201 by opening the liquid inlet cover 202 , and the chemical solvent in the solution tank 201 can be discharged by opening the liquid outlet cover 203 .

[0038] like Figure 8 , Fig. 9As shown, the adsorption device includes an adsorption cylinder 302 fixedly installed on the upper connecting plate 301, the air outlet pipe 206 is fixedly installed on the adsorption cylinder 302, a rain shield cap 303 is fixedly installed on the adsorption cylinder 302, a filter screen 305 is arranged in the adsorption cylinder 302, an adsorption spiral disk 304 is fixedly installed in the adsorption cylinder 302, the adsorption spiral disk 304 is spiral-shaped, a motor 306 is fixedly installed in the adsorption cylinder 302, and a fan 307 is fixedly installed on the motor shaft of the motor 306.

[0039] like Figure 8 , Fig. 9 As shown, the adsorption spiral disk 304 is filled with activated carbon, and a plurality of ventilation holes are provided on the adsorption spiral disk 304 .

[0040] The motor 306 drives the fan 307 to rotate, and the exhaust gas entering the adsorption cylinder 302 is drawn upward. The exhaust gas reaches the adsorption spiral disk 304 after being filtered by the filter net 305, and rises along the adsorption spiral disk 304. The exhaust gas is fully adsorbed by the activated carbon in the adsorption spiral disk 304, and then the exhaust gas is discharged through the top of the adsorption cylinder 302. The rain cap 303 is used to block rain to prevent rainwater from entering the adsorption cylinder 302.

[0041] The working principle of a small-scale waste gas treatment device disclosed in the present invention is as follows: the bottom of the inner treatment cylinder 101 is connected to the pipe for discharging waste gas from the outside, the waste gas enters the filter cylinder 112, and the large flocculent impurities are blocked by the filter cylinder 112 and fall into the dust collecting plate 102, and then the waste gas enters between the filter cylinder 112 and the inner treatment cylinder 101, and then enters the solution tank 201 through the air intake pipe 205. The rotation of the dual-axis motor 106 drives the inner bevel gear 107 and the outer bevel gear 108 to rotate, thereby driving the central bevel gear 116 and the central rotating shaft 117 to rotate, thereby driving the rotating frame 123 and the rotating frame 122 to rotate, thereby driving the brush wheel 118 and the brush wheel gear 119 to rotate, and under the action of the inner gear ring 120, the brush wheel gear 119 and the brush wheel 118 are driven to rotate, thereby realizing the self-rotation of the brush wheel 118 and the revolution around the central rotating shaft 117, and the filter cylinder 11 is driven by the brush wheel 118. 2, the flocculent impurities remaining on the inner wall and the hole are scraped off, and the flocculent impurities fall into the dust collecting plate 102. The outer bevel gear 108 drives the transmission bevel gear 109, the outer shaft 110 and the lower gear 111 to rotate, thereby driving the outer rotating gear 113 and the scraper rod 114 to rotate, thereby driving the scraper blade 115 to move along the outer wall of the filter cylinder 112, and the flocculent impurities remaining on the outer wall of the filter cylinder 112 are scraped off by the scraper blade 115, and the flocculent impurities fall into the dust collecting plate 102 to prevent the filter cylinder 112 from being blocked. The waste gas enters the chemical solvent in the solution tank 201 through the air inlet pipe 205, and the organic matter, acidic substances, etc. in the waste gas are removed by the chemical solvent, and then enters the adsorption cylinder 302 through the air outlet pipe 206. The liquid level of the chemical solvent in the solution tank 201 is observed through the liquid level tube 204. The chemical solvent can be added to the solution tank 201 by opening the liquid inlet cover 202, and the chemical solvent in the solution tank 201 can be discharged by opening the liquid outlet cover 203. The motor 306 drives the fan 307 to rotate, and the exhaust gas entering the adsorption cylinder 302 is pumped upward. The exhaust gas reaches the adsorption spiral disk 304 after being filtered by the filter screen 305, and rises along the adsorption spiral disk 304. The activated carbon in the adsorption spiral disk 304 fully adsorbs the exhaust gas, and then the exhaust gas is discharged through the top of the adsorption cylinder 302. The rain cap 303 is used to block rain and prevent rainwater from entering the adsorption cylinder 302.

[0042] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A small-sized waste gas treatment device, comprising a filtering device, characterized in that: The filtering device comprises an inner treatment cylinder (101), the filtering device is used to filter large flocculent impurities in the waste gas, the filtering device is provided with a liquid washing device and an adsorption device, the liquid washing device comprises a solution tank (201), the solution tank (201) is fixedly mounted on the inner treatment cylinder (101), the liquid washing device is used to chemically treat organic matter and acidic substances in the waste gas, the adsorption device comprises an upper connecting plate (301), the upper connecting plate (301) is fixedly mounted on the inner treatment cylinder (101), and the adsorption device is used to adsorb harmful substances in the waste gas; The filtering device comprises a dust collecting plate (102) rotatably mounted on the bottom of the inner treatment cylinder (101); the dust collecting plate (102) and the inner treatment cylinder (101) are rotatably mounted via threads; a connecting plate (104) is fixedly mounted in the inner treatment cylinder (101); a filter cylinder (112) is fixedly mounted on the connecting plate (104); a top plate (103) is fixedly mounted in the inner treatment cylinder (101); a fixing ring (124) is fixedly mounted on the filter cylinder (112); and a fixing ring (124) is fixedly mounted on the inner treatment cylinder (101). A motor cover (105) and a double-shaft motor (106) are fixedly installed, an inner bevel gear (107) and an outer bevel gear (108) are fixedly installed on the two motor shafts of the double-shaft motor (106), an outer shaft (110) is rotatably installed on the motor cover (105), a transmission bevel gear (109) and a lower gear (111) are fixedly installed on the outer shaft (110), the transmission bevel gear (109) is meshed with the outer bevel gear (108), and a stop cap (121) is fixedly installed in the inner processing cylinder (101); An inner scraping mechanism is provided on the top plate (103), and the inner scraping mechanism comprises a central rotating shaft (117) rotatably mounted on the top plate (103), a central bevel gear (116), a rotating frame (123) and a rotating frame (122) fixedly mounted on the central rotating shaft (117), the central bevel gear (116) meshing with the inner bevel gear (107), two brush wheels (118) rotatably mounted on the rotating frame (123) and the rotating frame (122), a brush wheel gear (119) fixedly mounted on the brush wheel (118), an inner gear ring (120) fixedly mounted on the inner wall of the filter cartridge (112), and the brush wheel gear (119) meshing with the inner gear ring (120); An external scraping mechanism is provided on the fixing ring (124), and the external scraping mechanism comprises an external gear (113) rotatably mounted on the fixing ring (124), the external gear (113) meshing with the lower gear (111), a scraping rod (114) fixedly mounted on the external gear (113), a scraping blade (115) fixedly mounted on the scraping rod (114), and the scraping blade (115) is in contact with the filter cartridge (112); The adsorption device comprises an adsorption cylinder (302) fixedly mounted on an upper connecting plate (301); an air outlet pipe (206) is fixedly mounted on the adsorption cylinder (302); a rain shield (303) is fixedly mounted on the adsorption cylinder (302); a filter (305) is arranged inside the adsorption cylinder (302); an adsorption spiral disk (304) is fixedly mounted inside the adsorption cylinder (302); the adsorption spiral disk (304) is spiral-shaped; a motor (306) is fixedly mounted inside the adsorption cylinder (302); and a fan (307) is fixedly mounted on the motor shaft of the motor (306).

2. A small-sized waste gas treatment device according to claim 1, characterized in that: The liquid washing device comprises an air inlet pipe (205) and an air outlet pipe (206) fixedly mounted on a solution tank (201); the solution tank (201) contains a chemical solvent; the air inlet pipe (205) is fixedly mounted on the top of an inner treatment cylinder (101); a liquid level pipe (204) is fixedly mounted on the solution tank (201); a scale is provided on the liquid level pipe (204) for observing the liquid level of the solvent in the solution tank (201); a liquid inlet cover (202) and a liquid outlet cover (203) are provided on the solution tank (201); the liquid inlet cover (202) and the liquid outlet cover (203) are respectively mounted on the solution tank (201) by means of threads.

3. A small-sized waste gas treatment device according to claim 2, characterized in that: The lower pipe opening of the air inlet pipe (205) is located in the solvent, and the lower pipe opening of the air outlet pipe (206) is located above the solvent liquid surface.

4. A small-sized waste gas treatment device according to claim 1, characterized in that: The adsorption spiral disk (304) contains activated carbon, and a plurality of ventilation holes are provided on the adsorption spiral disk (304).

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