Waste gas purification device for waste acid solution treatment

Abstract

The invention relates to the field of special equipment for environmental protection, in particular to a waste gas purification device for waste acid solution treatment, which comprises a purification cavity, the upper end of the purification cavity is fixedly connected with a waste gas inlet, and a main treatment mechanism is fixedly connected in the purification cavity. The air pump enables pretreated air to enter a concentric-square-shaped cavity through a first air outlet and a second air outlet, a second bevel gear fixedly connected with the motor is driven to rotate through rotation of the motor, a rotating shaft is driven to rotate through the meshing effect of the two second bevel gears, then fan blades are made to rotate, and through the effect of the fan blades, the air is purified. The gas in the concentric-square-shaped cavity flows along the spiral channel, under the action of centrifugal force, the density of the gas close to the axis of the concentric-square-shaped cavity is small, the density of the gas away from the axis of the concentric-square-shaped cavity is large, then the gas is separated, the separated gas flows out through the right-angle gas outlet pipe, and in this way, the gas with different densities is separated and recycled separately. And pollution of generated new pollutants to the environment is avoided.

Description

Technical Field

[0001] The invention relates to the field of special environmental protection equipment, in particular to a waste gas purification device for treating waste acid liquid. Background Art

[0002] Waste gas generated in industrial sites (such as flue gas, dust, odorous gas and other waste gases) often has certain hazards to the environment and human health. Purification measures should be taken before the waste gas is discharged into the atmosphere to make it meet the requirements of waste gas emission standards. Therefore, waste gas purification equipment came into being. Waste gas purification equipment is widely used in chemical, automotive, coatings, rubber and other technical fields. On the one hand, waste gas purification equipment can improve the surrounding environment and reduce environmental pollution. On the other hand, it can avoid causing troubles to residents around the factory. At the same time, it can also try to avoid health problems caused by harmful waste gas to factory workers. There are different waste gas purification methods and corresponding waste gas treatment equipment for different industries. Common waste gas purification methods include absorption, adsorption, condensation and combustion. Common waste gas treatment equipment includes absorption equipment, adsorption equipment, combustion and catalytic purification equipment of organic waste gas, etc. The existing publication number is: CN114206473A. The exhaust gas purification tower includes an air inlet section, an absorption section group, a demisting section and an air outlet section. The absorption section group includes at least one absorption section, the inlet of the absorption section group is connected to the outlet of the air inlet section, the inlet of the demisting section is connected to the outlet of the absorption section group, and the inlet of the air outlet section is connected to the outlet of the demisting section. The air inlet section, the absorption section, the demisting section and the air outlet section are arranged in sequence in the transverse direction, and the adjacent two components are detachably connected; The existing exhaust gas purification devices mainly have the following disadvantages: During operation, the existing waste gas purification device will generate new pollutant gas due to the reaction between the acidic liquid or alkaline liquid and the acidic component or alkaline component in the mixed gas. The new pollutant gas will damage the purification device or pollute the air. Summary of the invention

[0003] The object of the present invention is to provide a waste gas purification device for waste acid liquid treatment to solve the problems raised in the above background technology.

[0004] In order to achieve the above-mentioned invention object, the present invention adopts the following technical scheme: Provided is a waste gas purification device for waste acid liquid treatment, comprising a purification chamber, wherein the upper end of the purification chamber is fixedly connected to a waste gas inlet, and a main treatment mechanism is fixedly connected to the purification chamber; a secondary pollution prevention and control component is provided below the main treatment mechanism; wherein The main processing mechanism includes: A pretreatment component is fixedly installed in the purification chamber, a decrystallization component is fixedly connected to the pretreatment component, and a treatment liquid recovery component is fixedly connected to the decrystallization component.

[0005] Furthermore, the pre-processing component includes: A workbench, the workbench is fixedly connected in the purification chamber, the upper end of the workbench is fixedly connected with a liquid delivery pump, the liquid inlet end of the liquid delivery pump is fixedly connected to one end of the input pipe, the other end of the input pipe is fixedly connected to the liquid storage tank, the liquid storage tank is fixedly connected to the outside of the purification chamber, the liquid outlet end of the liquid delivery pump is fixedly connected to one end of the output pipe, the output pipe is fixedly connected to the filter screen, the filter screen is fixedly connected in the purification chamber, the other end of the output pipe is rotatably connected to a nozzle connecting shell, a plurality of nozzles are annularly arranged on the nozzle connecting shell, a connecting flange is fixedly connected to the output pipe, a sliding rod is slidably connected to the connecting flange, a spring is sleeved on the sliding rod, and the upper end of the sliding rod is located below the nozzle connecting shell.

[0006] Further, the decrystallization component includes: A conical baffle, a spiral condenser is fixedly connected to the lower end of the conical baffle, the conical baffle is fixedly connected to the output pipe, the conical baffle is located below the filter, a gas outlet is provided on the conical baffle, a driven shaft is rotatably connected to the conical baffle, a gear is fixedly connected to the upper end of the driven shaft, the gear is meshed with a gear ring, and a scraper rod is fixedly connected to the gear ring.

[0007] Furthermore, the treatment liquid recovery component includes: An annular chamber for treating liquid, wherein an annular filter is fixedly connected to the upper end of the annular chamber for treating liquid, a conversion groove is fixedly connected inside the annular chamber for treating liquid, a driving shaft 1 is rotatably connected inside the conversion groove, an impeller is fixedly connected to the driving shaft 1, one end of the driving shaft 1 is fixedly connected to a bevel gear 1, the lower end of the driven shaft 1 is fixedly connected to a bevel gear 1, the two bevel gears 1 are meshed, a treating liquid delivery pump is fixedly connected inside the annular chamber for treating liquid, one end of the conversion groove is fixedly connected to a treating liquid recovery tank, and the treating liquid recovery tank is fixedly connected to the outside of the purification chamber.

[0008] Furthermore, the secondary pollution prevention and control component includes: An air pump, the air pump is fixedly connected to the bottom of the workbench, the workbench is fixedly connected with a gas outlet 2, the purification chamber is fixedly connected with a return cavity, the return cavity is located below the air pump, a sealing cover is fixedly connected to the return cavity, the lower end of the return cavity is fixedly connected with a plurality of right-angle air outlet pipes, the bottom of the purification chamber is fixedly connected with a motor, the motor is fixedly connected to a bevel gear 2, the return cavity is rotatably connected with a rotating shaft at the axial position, the lower end of the rotating shaft is fixedly connected with a bevel gear 2, the two bevel gears 2 are meshed, the upper end of the rotating shaft is fixedly connected with a fan blade, and a spiral channel is fixedly connected in the return cavity.

[0009] Compared with the prior art, one or more of the above technical solutions have the following beneficial effects: 1. The air pump passes the pre-treated gas into the return cavity through gas outlet 1 and gas outlet 2, and drives a bevel gear 2 fixedly connected to it to rotate through the rotation of the motor. The meshing action of the two bevel gears 2 drives the rotating shaft to rotate, and then the fan blades rotate. Through the action of the fan blades, the gas in the return cavity flows along the spiral channel. Under the action of centrifugal force, the gas density close to the axis of the return cavity is small, and the gas density far away from the axis is large, thereby separating the gas. The separated gas flows out through the right-angle outlet pipe. In this way, gases of different densities are separated and recovered separately, avoiding the pollution of the environment by the generated new pollutants.

[0010] 2. After the exhaust gas enters the purification chamber from the exhaust gas inlet, the alkaline or acidic liquid in the liquid storage tank is transported to the nozzle connecting shell through the input pipe and the output pipe by the liquid delivery pump and sprayed out from the nozzle. Since the nozzle is fixedly connected to the outside of the nozzle connecting shell and is tangent to the outside of the nozzle connecting shell, when the nozzle sprays the liquid, the nozzle connecting shell rotates. A number of hemispherical protrusions are fixedly connected to the lower end of the nozzle connecting shell in an annular shape. During the rotation of the nozzle connecting shell, the hemispherical protrusions repeatedly abut against the upper end of the slide rod. Under the resetting action of the spring, the slide rod moves up and down, and then the other end of the slide rod collides with the filter screen, causing the filter screen to vibrate. This method can not only treat pollutants of a single nature, but also for complex exhaust gases containing multiple acidic and alkaline pollutants at the same time, it can also achieve coordinated removal of multiple pollutants by reasonably allocating liquid properties, thereby broadening the scope of application of exhaust gas treatment.

[0011] 3. As the scraper rod rotates, the crystals fall onto the annular filter screen, and the remaining liquid flows into the annular cavity of the treated liquid. The liquid in the annular cavity of the treated liquid is transported to the conversion tank by the treated liquid delivery pump, and then flows into the treated liquid recovery tank. In this process, the impeller rotates, and then drives the driving shaft 1 to rotate. Through the meshing action of the two bevel gears 1, the driven shaft 1 rotates. In the process of the liquid flowing down from the upper surface of the conical baffle, the condensation action of the spiral condenser tube causes crystals to precipitate in the liquid. When the driven shaft 1 rotates, it drives the gear fixed to it to rotate. Through the meshing action of the gear and the gear ring, the gear ring rotates. When the gear ring rotates, it drives the scraper rod to rotate, and the crystals on the upper surface of the conical baffle are scraped off. After the remaining liquid flows into the annular cavity of the treated liquid, it is transported to the conversion tank and then flows to the treated liquid recovery tank. In many cases, the remaining liquid still contains unreacted raw materials, additives or catalysts with certain value and other components. After it is recovered, it can be further separated, purified and processed to obtain valuable substances and use them in the production process again, reducing production costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] The accompanying drawings in the specification, which constitute a part of the present invention, are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute improper limitations on the present invention.

[0013] In addition, the terms "installed", "set", "provided with", "connected", "connected", and "socketed" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral structure; it can be a mechanical connection, or an electrical connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be an internal connection between two devices, elements, or components. For those of ordinary skill in the art, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0014] Figure 1 It is a schematic diagram of the overall three-dimensional structure of the present invention; Figure 2 It is a schematic diagram of the overall three-dimensional structure of the present invention; Figure 3 It is a schematic diagram of the overall three-dimensional structure of the pretreatment component of the present invention; Figure 4 It is a schematic diagram of the overall three-dimensional structure of the slide bar of the present invention; Figure 5 It is a schematic diagram of the overall three-dimensional structure of the crystal assembly of the present invention; Figure 6 It is a schematic diagram of the overall three-dimensional structure of the crystal assembly of the present invention; Figure 7 It is a schematic diagram of the overall three-dimensional structure of the treatment liquid recovery assembly of the present invention; Figure 8It is a schematic diagram of the overall three-dimensional structure of the treatment liquid recovery assembly of the present invention; Fig. 9 It is a schematic diagram of the overall three-dimensional structure of the secondary pollution prevention and control component of the present invention; Fig.10 This is a schematic diagram of the overall three-dimensional structure of the secondary pollution prevention and control component of the present invention; Fig.11 This is a front view of the overall three-dimensional structure of the return cavity of the present invention; In the accompanying drawings, the components represented by the reference numerals are listed as follows: 1. Purification chamber; 11. Exhaust gas inlet; 2. Main treatment mechanism; 21. Pretreatment component; 211. Workbench; 212. Liquid delivery pump; 213. Input pipeline; 214. Liquid storage tank; 215. Output pipeline; 216. Filter screen; 217. Nozzle connection shell; 218. Nozzle; 219. Connecting flange; 2191. Sliding rod; 2192. Spring; 22. Decrystallization component; 221. Conical baffle; 2211. Gas outlet 1; 222. Spiral condenser; 223. Driven shaft 1; 224. Gear; 225. Gear ring; 226. Scraper; 23. Treatment liquid recovery component; 231. Treatment liquid annular cavity; 232. Annular filter screen; 233. Conversion tank; 234. Driving shaft 1; 2341. Bevel gear 1; 235. Impeller; 236. Treatment liquid delivery pump; 237. Treatment liquid recovery tank; 3. Secondary pollution prevention and control components; 31. Air pump; 32. Gas outlet 2; 33. Return cavity; 331. Spiral channel; 34. Sealing cover; 35. Right-angle air outlet pipe; 36. Motor; 37. Bevel gear 2; 38. Rotating shaft; 39. Fan blades. DETAILED DESCRIPTION

[0015] In order to enable those skilled in the art to better understand the solution of the present application, the following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of this application.

[0016] Reference Figure 1-2 As shown, a waste gas purification device for waste acid liquid treatment includes a purification chamber 1, the upper end of the purification chamber 1 is fixedly connected to a waste gas inlet 11, and a main treatment mechanism 2 is fixedly connected inside the purification chamber 1; a secondary pollution prevention and control component 3 is provided below the main treatment mechanism 2; wherein The main processing mechanism 2 includes: The pretreatment component 21 is fixedly installed in the purification chamber 1 , the pretreatment component 21 is fixedly connected to a de-crystallization component 22 , and the de-crystallization component 22 is fixedly connected to a treatment liquid recovery component 23 .

[0017] The waste gas enters the purification chamber 1 from the waste gas inlet 11. During the sedimentation process, the waste gas is first preliminarily purified by the pretreatment component 21. The treatment liquid generated during the treatment process falls on the crystallization component, so that the crystallization component crystallizes part of the liquid in the treatment liquid. The remaining liquid flows down from the crystallization component and enters the treatment liquid recovery component for recovery. At this time, the remaining gas in the purification chamber 1 is further purified by the secondary pollution prevention and control component 3.

[0018] Reference Figure 3-4 As shown, the pre-processing component 21 includes: A workbench 211 is fixedly connected in the purification chamber 1. A liquid delivery pump 212 is fixedly connected to the upper end of the workbench 211. The liquid inlet end of the liquid delivery pump 212 is fixedly connected to one end of an input pipe 213. The other end of the input pipe 213 is fixedly connected to a liquid storage tank 214. The liquid storage tank 214 is fixedly connected to the outside of the purification chamber 1. The liquid outlet end of the liquid delivery pump 212 is fixedly connected to one end of an output pipe 215. The output pipe 215 is fixedly connected to the liquid storage tank 214. The filter screen 216 is fixedly connected, and the filter screen 216 is fixedly connected in the purification chamber 1. The other end of the output pipe 215 is rotatably connected to the nozzle connecting shell 217. A plurality of nozzles 218 are annularly arranged on the nozzle connecting shell 217. A connecting flange 219 is fixedly connected to the output pipe 215, and a sliding rod 2191 is slidably connected to the connecting flange 219. A spring 2192 is sleeved on the sliding rod 2191, and the upper end of the sliding rod 2191 is located below the nozzle connecting shell 217.

[0019] After the exhaust gas enters the purification chamber 1 from the exhaust gas inlet 11, the alkaline or acidic liquid in the liquid storage tank 214 is transported to the nozzle connecting shell 217 through the input pipe 213 and the output pipe 215 by the liquid delivery pump 212, and is sprayed out from the nozzle 218. Since the nozzle 218 is fixedly connected to the outside of the nozzle connecting shell 217 and is tangent to the outside of the nozzle connecting shell 217, when the nozzle 218 sprays the liquid, the nozzle connecting shell 217 rotates, and a plurality of hemispherical protrusions are fixedly connected in an annular manner to the lower end of the nozzle connecting shell 217. During the rotation of the nozzle connecting shell 217, the hemispherical protrusions repeatedly abut against the upper end of the slide rod 2191. Under the reset action of the spring 2192, the slide rod 2191 moves up and down, and then the other end of the slide rod 2191 collides with the filter 216, causing the filter 216 to vibrate.

[0020] Reference Figure 5-6As shown, the decrystallization component 22 includes: A conical baffle 221, a spiral condenser 222 is fixedly connected to the lower end of the conical baffle 221, the conical baffle 221 is fixedly connected to the output pipe 215, the conical baffle 221 is located below the filter 216, a gas outlet 2211 is provided on the conical baffle 221, a driven shaft 223 is rotatably connected to the conical baffle 221, a gear 224 is fixedly connected to the upper end of the driven shaft 223, the gear 224 is meshed with a gear ring 225, and a scraper rod 226 is fixedly connected to the gear ring 225.

[0021] In the process of liquid flowing down from the upper surface of the conical baffle 221, crystals are precipitated in the liquid through the condensation effect of the spiral condenser 222, and the driven shaft 223 rotates to drive the gear 224 fixedly connected thereto to rotate, and the gear ring 225 rotates through the meshing effect of the gear 224 and the gear ring 225. When the gear ring 225 rotates, the scraper rod 226 is driven to rotate to scrape off the crystals on the upper surface of the conical baffle 221.

[0022] Reference Figure 7-8 As shown, the treatment liquid recovery component 23 includes: A treatment liquid annular chamber 231, wherein an annular filter screen 232 is fixedly connected to the upper end of the treatment liquid annular chamber 231, a conversion groove 233 is fixedly connected inside the treatment liquid annular chamber 231, a driving shaft 234 is rotatably connected inside the conversion groove 233, an impeller 235 is fixedly connected to the driving shaft 234, one end of the driving shaft 234 is fixedly connected to a bevel gear 2341, the lower end of the driven shaft 223 is fixedly connected to a bevel gear 2341, the two bevel gears 2341 are meshed, a treatment liquid delivery pump 236 is fixedly connected inside the treatment liquid annular chamber 231, one end of the conversion groove 233 is fixedly connected to a treatment liquid recovery tank 237, and the treatment liquid recovery tank 237 is fixedly connected to the outside of the purification chamber 1.

[0023] As the scraper rod 226 rotates, the crystals fall onto the annular filter screen 232, and the remaining liquid flows into the treatment liquid annular chamber 231. The liquid in the treatment liquid annular chamber 231 is transported to the conversion tank 233 through the treatment liquid delivery pump 236, and then flows into the treatment liquid recovery tank 237. In this process, the impeller 235 rotates, which in turn drives the driving shaft 234 to rotate, and through the meshing action of the two bevel gears 2341, the driven shaft 223 rotates.

[0024] Reference Figure 9-11 As shown, the secondary pollution prevention and control component 3 includes: An air pump 31 is fixedly connected to the bottom of a workbench 211, a gas outlet 2 32 is fixedly connected to the workbench 211, a return cavity 33 is fixedly connected to the purification chamber 1, the return cavity 33 is located below the air pump 31, a sealing cover 34 is fixedly connected to the return cavity 33, a plurality of right-angle air outlet pipes 35 are fixedly connected to the lower end of the return cavity 33, a motor 36 is fixedly connected to the bottom of the purification chamber 1, the motor 36 is fixedly connected to a bevel gear 2 37, a rotating shaft 38 is rotatably connected to the axial position of the return cavity 33, a bevel gear 2 37 is fixedly connected to the lower end of the rotating shaft 38, two bevel gears 2 37 are meshed, a fan blade 39 is fixedly connected to the upper end of the rotating shaft 38, and a spiral channel 331 is fixedly connected to the return cavity 33.

[0025] The air pump 31 passes the pretreated gas into the return cavity 33 through the gas outlet 1 2211 and the gas outlet 2 32, and drives a bevel gear 2 37 fixedly connected to it to rotate through the rotation of the motor 36. The meshing action of the two bevel gears 2 37 drives the rotating shaft 38 to rotate, and then the fan blades 39 rotate. Through the action of the fan blades 39, the gas in the return cavity 33 flows along the spiral channel 331. Under the action of centrifugal force, the gas density close to the axis of the return cavity 33 is small, and the gas density far away from the axis is large, thereby separating the gas, and the separated gas flows out through the right-angle outlet pipe 35.

[0026] In the description of the present invention, it should be understood that the terms "longitudinal", "lateral", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention. In the description of the present invention, unless otherwise specified and limited, it should be noted that the terms "installed", "connected" and "connected" should be understood in a broad sense, for example, it can be a mechanical connection or an electrical connection, or it can be the internal communication of two elements, it can be a direct connection, or it can be an indirect connection through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms can be understood according to specific circumstances.

[0027] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A waste gas purification device for waste acid liquid treatment, characterized in that: The invention comprises a purification chamber (1), wherein the upper end of the purification chamber (1) is fixedly connected to an exhaust gas inlet (11), and a main processing mechanism (2) is fixedly connected inside the purification chamber (1); a secondary pollution prevention and control component (3) is provided below the main processing mechanism (2); wherein The main processing mechanism (2) comprises: A pretreatment component (21), the pretreatment component (21) being fixedly installed in the purification chamber (1), the pretreatment component (21) being fixedly connected to a decrystallization component (22), and the decrystallization component (22) being fixedly connected to a treatment liquid recovery component (23).

2. The waste gas purification device for waste acid liquid treatment according to claim 1, characterized in that: The pre-processing component (21) comprises: A workbench (211), the workbench (211) is fixedly connected in the purification chamber (1), the upper end of the workbench (211) is fixedly connected to a liquid delivery pump (212), the liquid inlet end of the liquid delivery pump (212) is fixedly connected to one end of an input pipe (213), the other end of the input pipe (213) is fixedly connected to a liquid storage tank (214), the liquid storage tank (214) is fixedly connected to the outside of the purification chamber (1), the liquid outlet end of the liquid delivery pump (212) is fixedly connected to one end of an output pipe (215), and the output pipe (215) is fixedly connected to the filter. The filter screen (216) is fixedly connected to the purification chamber (1); the other end of the output pipe (215) is rotatably connected to the nozzle connection shell (217); a plurality of nozzles (218) are annularly arranged on the nozzle connection shell (217); a connecting flange (219) is fixedly connected to the output pipe (215); a sliding rod (2191) is slidably connected to the connecting flange (219); a spring (2192) is sleeved on the sliding rod (2191); and the upper end of the sliding rod (2191) is located below the nozzle connection shell (217).

3. The waste gas purification device for waste acid liquid treatment according to claim 2, characterized in that: The decrystallization component (22) comprises: A conical baffle (221), the lower end of which is fixedly connected to a spiral condenser tube (222), the conical baffle (221) is fixedly connected to the output pipe (215), the conical baffle (221) is located below the filter screen (216), a gas outlet 1 (2211) is provided on the conical baffle (221), a driven shaft 1 (223) is rotatably connected to the conical baffle (221), a gear (224) is fixedly connected to the upper end of the driven shaft 1 (223), the gear (224) is meshed with a gear ring (225), and a scraper rod (226) is fixedly connected to the gear ring (225).

4. The waste gas purification device for waste acid liquid treatment according to claim 3, characterized in that: The treatment liquid recovery component (23) comprises: A treatment liquid annular chamber (231), wherein an annular filter screen (232) is fixedly connected to the upper end of the treatment liquid annular chamber (231), a conversion groove (233) is fixedly connected inside the treatment liquid annular chamber (231), a driving shaft (234) is rotatably connected inside the conversion groove (233), an impeller (235) is fixedly connected to the driving shaft (234), one end of the driving shaft (234) is fixedly connected to a bevel gear (2341), the lower end of the driven shaft (223) is fixedly connected to a bevel gear (2341), the two bevel gears (2341) are meshed, a treatment liquid delivery pump (236) is fixedly connected inside the treatment liquid annular chamber (231), one end of the conversion groove (233) is fixedly connected to a treatment liquid recovery box (237), and the treatment liquid recovery box (237) is fixedly connected to the outside of the purification chamber (1).

5. The waste gas purification device for waste acid liquid treatment according to claim 4, characterized in that: The secondary pollution prevention and control component (3) comprises: An air pump (31) is fixedly connected to the bottom of a workbench (211), a gas outlet 2 (32) is fixedly connected to the workbench (211), a return cavity (33) is fixedly connected to the inside of the purification chamber (1), the return cavity (33) is located below the air pump (31), a sealing cover (34) is fixedly connected to the return cavity (33), a plurality of right-angled gas outlet pipes (35) are fixedly connected to the lower end of the return cavity (33), and the purification chamber (1) is fixedly connected to a return cavity (33). A motor (36) is fixedly connected to the bottom of the cavity (1), and the motor (36) is fixedly connected to a bevel gear (37). A rotating shaft (38) is rotatably connected to the axis of the return cavity (33). The lower end of the rotating shaft (38) is fixedly connected to a bevel gear (37). The two bevel gears (37) are meshed. A fan blade (39) is fixedly connected to the upper end of the rotating shaft (38). A spiral channel (331) is fixedly connected inside the return cavity (33).

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