An exhaust gas purification device for waste acid liquid treatment

Abstract

The present invention relates to the field of environmental protection special equipment, specifically an exhaust gas purification device for waste acid liquid treatment, including a purification cavity. An exhaust gas inlet is fixedly connected to the upper end of the purification cavity. A main treatment mechanism is fixedly connected inside the purification cavity. An air pump passes the pretreated gas through gas outlet one and gas outlet two into the return cavity. By rotating the motor, a bevel gear two fixedly connected thereto is driven to rotate. Through the meshing action of the two bevel gears two, the rotating shaft is driven 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 close to the axis of the return cavity has a small density, and the gas far from the axis has a large density, thereby separating the gas. The separated gas flows out through the right-angle air outlet pipe. By this method, gases with different densities are separated and recycled separately, avoiding the pollution of the environment caused by the newly generated pollutants.

Description

Technical Field

[0001] The present invention relates to the field of environmental protection special equipment, and specifically to an exhaust gas purification device for waste acid liquid treatment. Background Art

[0002] Exhaust gases generated in industrial sites (such as flue gas dust, odor gases, etc.) often pose certain hazards to the environment and human health. Before the exhaust gas is discharged into the atmosphere, purification measures should be taken to make it meet the requirements of the exhaust gas emission standards. Therefore, exhaust gas purification equipment has emerged. Exhaust gas purification equipment is widely used in technical fields such as chemical industry, automobiles, coatings, rubber, etc. On the one hand, the exhaust gas purification equipment can improve the surrounding environment and reduce environmental pollution. On the other hand, it can avoid disturbing the residents around the factory, and at the same time can also avoid the health problems of the workers in the factory caused by harmful exhaust gases. For different industries, there are different exhaust gas purification methods and corresponding exhaust gas treatment equipment. Commonly used exhaust gas purification methods include absorption method, adsorption method, condensation method and combustion method. Commonly used exhaust gas treatment equipment includes absorption equipment, adsorption equipment, combustion and catalytic purification equipment for organic exhaust gases, etc.;

[0003] There is an existing exhaust gas purification tower with the publication number: 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 communicated with the outlet of the air inlet section. The inlet of the demisting section is communicated with the outlet of the absorption section group. The inlet of the air outlet section is communicated with 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 horizontally and are detachably connected between adjacent two components;

[0004] The existing exhaust gas purification devices mainly have the following disadvantages:

[0005] During the operation of the existing exhaust gas purification devices, new polluting gases will be generated after the reaction of acidic liquids or alkaline liquids with acidic components or alkaline components in the mixed gas. The new polluting gases will damage the purification devices or pollute the air. Summary of the Invention

[0006] The purpose of the present invention is to provide an exhaust gas purification device for waste acid liquid treatment to solve the problems raised in the above background art.

[0007] To achieve the above invention purpose, the present invention adopts the following technical solutions:

[0008] Provide an exhaust gas purification device for waste acid liquid treatment, including a purification cavity. An exhaust gas inlet is fixedly connected to the upper end of the purification cavity. A main treatment mechanism is fixedly connected inside the purification cavity; A secondary pollution prevention and control component is arranged below the main treatment mechanism; Among them

[0009] The main processing mechanism includes:

[0010] A pretreatment component, which is fixedly installed in the purification cavity. A de-crystallization component is fixedly connected to the pretreatment component, and a processing liquid recovery component is fixedly connected to the de-crystallization component.

[0011] Furthermore, the pretreatment component includes:

[0012] A workbench, which is fixedly connected in the purification cavity. A liquid delivery pump is fixedly connected to the upper end of the workbench. The liquid inlet end of the liquid delivery pump is fixedly connected to one end of an input pipeline, and the other end of the input pipeline is fixedly connected to a liquid storage tank. The liquid storage tank is fixedly connected to the outside of the purification cavity. The liquid outlet end of the liquid delivery pump is fixedly connected to one end of an output pipeline. The output pipeline is fixedly connected to a filter screen, and the filter screen is fixedly connected in the purification cavity. The other end of the output pipeline is rotatably connected to a nozzle connection shell. A plurality of nozzles are annularly arranged on the nozzle connection shell. A connection flange is fixedly connected to the output pipeline. A sliding rod is slidably connected to the connection flange. A spring is sleeved on the sliding rod, and the upper end of the sliding rod is located below the nozzle connection shell.

[0013] Furthermore, the de-crystallization component includes:

[0014] A conical baffle, the lower end of which is fixedly connected to a spiral condensation pipe. The conical baffle is fixedly connected to the output pipeline. The conical baffle is located below the filter screen. A gas outlet one is opened on the conical baffle. A driven shaft one is rotatably connected to the conical baffle. A gear is fixedly connected to the upper end of the driven shaft one. The gear meshes with a toothed ring, and a scraping rod is fixedly connected to the toothed ring.

[0015] Furthermore, the processing liquid recovery component includes:

[0016] A processing liquid annular cavity, the upper end of which is fixedly connected to an annular filter screen. A conversion groove is fixedly connected in the processing liquid annular cavity. A driving shaft one is rotatably connected in the conversion groove. An impeller is fixedly connected to the driving shaft one. A bevel gear one is fixedly connected to one end of the driving shaft one. A bevel gear one is fixedly connected to the lower end of the driven shaft one. The two bevel gears one mesh with each other. A processing liquid delivery pump is fixedly connected in the processing liquid annular cavity. One end of the conversion groove is fixedly connected to a processing liquid recovery tank, and the processing liquid recovery tank is fixedly connected to the outside of the purification cavity.

[0017] Furthermore, the secondary pollution prevention and control component includes:

[0018] An air pump, the air pump is fixedly connected below the workbench, a second gas outlet is fixedly connected to the workbench, a return cavity is fixedly connected inside the purification cavity, the return cavity is located below the air pump, a sealing cover is fixedly connected to the return cavity, and a plurality of right-angle air outlet pipes are fixedly connected to the lower end of the return cavity. A motor is fixedly connected to the bottom of the purification cavity, the motor is fixedly connected to a second bevel gear, a rotating shaft is rotatably connected at the axial center position of the return cavity, a second bevel gear is fixedly connected to the lower end of the rotating shaft, the two second bevel gears are meshed, a fan blade is fixedly connected to the upper end of the rotating shaft, and a spiral channel is fixedly connected inside the return cavity.

[0019] Compared with the prior art, the above one or more technical solutions have the following beneficial effects:

[0020] 1. The air pump enters the pre-treated gas into the return cavity through the first gas outlet and the second gas outlet. The motor rotates to drive a second bevel gear fixedly connected thereto. Through the meshing action of the two second bevel gears, the rotating shaft is driven to rotate, and then the fan blade rotates. Through the action of the fan blade, the gas in the return cavity flows along the spiral channel. Under the action of centrifugal force, the gas close to the axial center of the return cavity has a small density, and the gas far from the axial center has a large density. Thus, the gas is separated. The separated gas flows out through the right-angle air outlet pipe. In this way, gases with different densities are separated and recycled separately, avoiding the pollution of the environment caused by the newly generated pollutants.

[0021] 2. After the waste gas enters the purification cavity from the waste gas inlet, the alkaline or acidic liquid in the liquid storage tank is transported to the nozzle connection 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 connection shell and is tangent to the outside of the nozzle connection shell, when the liquid is sprayed out from the nozzle, the nozzle connection shell rotates. A plurality of hemispherical convex blocks are annularly and fixedly connected to the lower end of the nozzle connection shell. During the rotation of the nozzle connection shell, the hemispherical convex blocks repeatedly abut against the upper end of the sliding rod. Under the reset action of the spring, the sliding rod moves up and down, and then the other end of the sliding 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 waste gases containing multiple acidic and alkaline pollutants, through reasonable adjustment of the liquid properties, achieve the co-removal of multiple pollutants, broadening the scope of application of waste gas treatment.

[0022] 3. As the scraping rod rotates, the crystals fall onto the annular filter screen, and the remaining liquid flows into the processing liquid annular cavity. The liquid in the processing liquid annular cavity is transported to the conversion tank by the processing liquid delivery pump and then flows into the processing liquid recovery tank. During this process, the impeller rotates, which in turn drives the rotation of the first driving shaft. Through the meshing of the two first bevel gears, the first driven shaft rotates. As the liquid flows down from the upper surface of the conical baffle, crystals precipitate in the liquid through the condensation of the spiral condenser tube. When the first driven shaft rotates, it drives the gear fixedly connected to it to rotate. Through the meshing of the gear and the toothed ring, the toothed ring rotates. When the toothed ring rotates, it drives the scraping rod to rotate, scraping the crystals on the upper surface of the conical baffle. After the remaining liquid flows into the processing liquid annular cavity, it is transported to the conversion tank and then flows into the processing liquid recovery tank. In many cases, the remaining liquid still contains components such as unreacted raw materials, valuable additives or catalysts. After recycling, it can be further separated, purified, etc., to obtain valuable substances again and be used in the production process again, reducing production costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] The schematic diagrams of the specification drawings forming a part of the present invention are used to provide a further understanding of the present invention. The schematic embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation to the present invention.

[0024] In addition, the terms "installed", "set up", "provided with", "connected", "linked", "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 directly connected, or indirectly connected through an intermediate medium, or there is an internal connection between two devices, components or parts. 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.

[0025] Figure 1 is the overall three-dimensional structure schematic diagram of the present invention;

[0026] Figure 2 is the exploded schematic diagram of the overall three-dimensional structure of the present invention;

[0027] Figure 3 is the overall three-dimensional structure schematic diagram of the pretreatment component of the present invention;

[0028] Figure 4 is the overall three-dimensional structure schematic diagram of the sliding rod of the present invention;

[0029] Figure 5 is the overall three-dimensional structure schematic diagram of the crystallization component of the present invention;

[0030] Figure 6 is the exploded schematic diagram of the overall three-dimensional structure of the crystallization component of the present invention;

[0031] Figure 7 Schematic diagram of the overall three-dimensional structure of the treatment liquid recovery component of the present invention;

[0032] Figure 8 Exploded schematic diagram of the overall three-dimensional structure of the treatment liquid recovery component of the present invention;

[0033] Figure 9 Schematic diagram of the overall three-dimensional structure of the secondary pollution prevention and control component of the present invention;

[0034] Figure 10 Exploded schematic diagram of the overall three-dimensional structure of the secondary pollution prevention and control component of the present invention;

[0035] Figure 11 Front view of the overall three-dimensional structure of the return cavity of the present invention;

[0036] In the attached drawings, the list of components represented by each reference numeral is as follows:

[0037] 1. Purification cavity; 11. Exhaust gas inlet;

[0038] 2. Main treatment mechanism; 21. Pretreatment component; 211. Workbench; 212. Liquid transfer pump; 213. Input pipeline; 214. Liquid storage tank; 215. Output pipeline; 216. Filter screen; 217. Nozzle connection shell; 218. Nozzle; 219. Connection flange; 2191. Slide bar; 2192. Spring; 22. De-crystallization component; 221. Conical baffle; 2211. Gas outlet 1; 222. Spiral condenser; 223. Driven shaft 1; 224. Gear; 225. Tooth ring; 226. Scraping rod; 23. Treatment liquid recovery component; 231. Treatment liquid annular cavity; 232. Annular filter screen; 233. Conversion slot; 234. Driving shaft 1; 2341. Bevel gear 1; 235. Impeller; 236. Treatment liquid transfer pump; 237. Treatment liquid recovery tank;

[0039] 3. Secondary pollution prevention and control component; 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 blade. Detailed implementation manners

[0040] In order to enable those skilled in the art to better understand the solution of the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present application.

[0041] Referring to Figure 1-2 As shown, an exhaust gas purification device for waste acid liquid treatment includes a purification cavity 1. An exhaust gas inlet 11 is fixedly connected to the upper end of the purification cavity 1. A main treatment mechanism 2 is fixedly connected inside the purification cavity 1. A secondary pollution prevention and control component 3 is arranged below the main treatment mechanism 2. Among them

[0042] The main treatment mechanism 2 includes:

[0043] A pretreatment component 21, the pretreatment component 21 is fixedly installed inside the purification cavity 1. A de-crystallization component 22 is fixedly connected to the pretreatment component 21. A treatment liquid recovery component 23 is fixedly connected to the de-crystallization component 22.

[0044] The exhaust gas enters the purification cavity 1 from the exhaust gas inlet 11. During the sedimentation process of the exhaust gas, the pretreatment component 21 first preliminarily purifies the exhaust gas. The treatment liquid generated during the treatment process falls onto the crystallization component, enabling the crystallization component to crystallize 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 cavity 1 is further purified by the secondary pollution prevention and control component 3.

[0045] Referring to Figure 3-4 As shown, the pretreatment component 21 includes:

[0046] A workbench 211, the workbench 211 is fixedly connected inside the purification cavity 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 pipeline 213. The other end of the input pipeline 213 is fixedly connected to a liquid storage tank 214. The liquid storage tank 214 is fixedly connected to the outside of the purification cavity 1. The liquid outlet end of the liquid delivery pump 212 is fixedly connected to one end of an output pipeline 215. The output pipeline 215 is fixedly connected to a filter screen 216. The filter screen 216 is fixedly connected inside the purification cavity 1. The other end of the output pipeline 215 is rotatably connected to a nozzle connection shell 217. A plurality of nozzles 218 are annularly arranged on the nozzle connection shell 217. A connection flange 219 is fixedly connected to the output pipeline 215. A sliding rod 2191 is slidably connected to the connection flange 219. A spring 2192 is sleeved on the sliding rod 2191. The upper end of the sliding rod 2191 is located below the nozzle connection shell 217.

[0047] After the waste gas enters the purification cavity 1 from the waste gas inlet 11, the alkaline or acidic liquid in the liquid storage tank 214 is transported to the nozzle connection shell 217 through the input pipeline 213 and the output pipeline 215 by the liquid delivery pump 212 and sprayed out from the nozzle 218. Since the nozzle 218 is fixedly connected to the outside of the nozzle connection shell 217 and is tangent to the outside of the nozzle connection shell 217, when the liquid is sprayed out from the nozzle 218, the nozzle connection shell 217 rotates. A number of hemispherical bumps are fixedly connected to the lower end of the nozzle connection shell 217 in a ring shape. During the rotation of the nozzle connection shell 217, the hemispherical bumps repeatedly abut against the upper end of the slide bar 2191. Under the reset action of the spring 2192, the slide bar 2191 moves up and down, and then the other end of the slide bar 2191 collides with the filter screen 216, causing the filter screen 216 to vibrate.

[0048] Referring to Figure 5-6 as shown, the de-crystallization component 22 includes:

[0049] A conical baffle 221, the lower end of the conical baffle 221 is fixedly connected with a spiral condenser tube 222. The conical baffle 221 is fixedly connected to the output pipeline 215. The conical baffle 221 is located below the filter screen 216. A gas outlet 2211 is opened on the conical baffle 221. A driven shaft 223 is rotatably connected to the conical baffle 221. The upper end of the driven shaft 223 is fixedly connected with a gear 224. The gear 224 meshes with a toothed ring 225. A scraping rod 226 is fixedly connected to the toothed ring 225.

[0050] During the process of the liquid flowing down from the upper surface of the conical baffle 221, through the condensation effect of the spiral condenser tube 222, crystals are precipitated in the liquid. When the driven shaft 223 rotates, it drives the gear 224 fixedly connected thereto to rotate. Through the meshing action of the gear 224 and the toothed ring 225, the toothed ring 225 rotates. When the toothed ring 225 rotates, it drives the scraping rod 226 to rotate, and scrapes the crystals on the upper surface of the conical baffle 221.

[0051] Referring to Figure 7-8 as shown, the treatment liquid recovery component 23 includes:

[0052] The processing liquid annular cavity 231, an annular filter screen 232 is fixedly connected to the upper end of the processing liquid annular cavity 231, a conversion groove 233 is fixedly connected inside the processing liquid annular cavity 231, a driving shaft one 234 is rotatably connected inside the conversion groove 233, an impeller 235 is fixedly connected to the driving shaft one 234, a bevel gear one 2341 is fixedly connected to one end of the driving shaft one 234, a bevel gear one 2341 is fixedly connected to the lower end of the driven shaft one 223, and the two bevel gears one 2341 are meshed. A processing liquid delivery pump 236 is fixedly connected inside the processing liquid annular cavity 231, one end of the conversion groove 233 is fixedly connected to the processing liquid recovery tank 237, and the processing liquid recovery tank 237 is fixedly connected to the outside of the purification cavity 1.

[0053] As the scraping rod 226 rotates, the crystals fall onto the annular filter screen 232, and the remaining liquid flows into the processing liquid annular cavity 231. The liquid in the processing liquid annular cavity 231 is transported into the conversion groove 233 by the processing liquid delivery pump 236, and then flows into the processing liquid recovery tank 237. During this process, the impeller 235 rotates, thereby driving the driving shaft one 234 to rotate. Through the meshing of the two bevel gears one 2341, the driven shaft one 223 rotates.

[0054] Refer to Figure 9-11 As shown in the figure, the secondary pollution prevention and control component 3 includes:

[0055] An air pump 31, the air pump 31 is fixedly connected below the workbench 211, a gas outlet two 32 is fixedly connected to the workbench 211, a return cavity 33 is fixedly connected inside the purification cavity 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 cavity 1, the motor 36 is fixedly connected to a bevel gear two 37, a rotating shaft 38 is rotatably connected at the axial center position of the return cavity 33, a bevel gear two 37 is fixedly connected to the lower end of the rotating shaft 38, the two bevel gears two 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 inside the return cavity 33.

[0056] The air pump 31 passes the pre-treated gas into the return cavity 33 through the first gas outlet 2211 and the second gas outlet 32. The rotation of the motor 36 drives the rotation of a second bevel gear 37 fixedly connected thereto. Through the meshing action of the two second bevel gears 37, the rotation shaft 38 is driven to rotate, and then the fan blade 39 rotates. Through the action of the fan blade 39, the gas in the return cavity 33 flows along the spiral channel 331. Under the action of centrifugal force, the gas density near the axis of the return cavity 33 is small, and the gas density far from the axis is large, so that the gas is separated. The separated gas flows out through the right-angle gas outlet pipe 35.

[0057] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the terms "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings. It is 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, so it should not be construed as a limitation to the present invention. In the description of the present invention, unless otherwise specified and limited, it should be noted that the terms "installation", "connection", and "connection" 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 directly connected or indirectly connected through an intermediate medium. For those of ordinary skill in the art, the specific meanings of the above terms can be understood according to specific circumstances.

[0058] The above is only the preferred embodiment of the present invention, and it is not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. An exhaust gas purification device for treating waste acid liquid, characterized in that: It includes a purification cavity (1), an exhaust gas inlet (11) is fixedly connected to the upper end of the purification cavity (1), and a main treatment mechanism (2) is fixedly connected inside the purification cavity (1); a secondary pollution prevention and control component (3) is arranged below the main treatment mechanism (2); among them The main treatment mechanism (2) includes: A pretreatment component (21), the pretreatment component (21) is fixedly installed inside the purification cavity (1), a crystallization removal component (22) is fixedly connected to the pretreatment component (21), and a treatment liquid recovery component (23) is fixedly connected to the crystallization removal component (22); The pretreatment component (21) includes: A workbench (211), the workbench (211) is fixedly connected inside the purification cavity (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 pipeline (213), the other end of the input pipeline (213) is fixedly connected to a liquid storage tank (214), the liquid storage tank (214) is fixedly connected to the outside of the purification cavity (1), the liquid outlet end of the liquid delivery pump (212) is fixedly connected to one end of an output pipeline (215), the output pipeline (215) is fixedly connected to a filter screen (216), the filter screen (216) is fixedly connected inside the purification cavity (1), the other end of the output pipeline (215) is rotatably connected to a nozzle connection shell (217), a plurality of nozzles (218) are annularly arranged on the nozzle connection shell (217), a connection flange (219) is fixedly connected to the output pipeline (215), a slide bar (2191) is slidably connected to the connection flange (219), a spring (2192) is sleeved on the slide bar (2191), and the upper end of the slide bar (2191) is located below the nozzle connection shell (217); The crystallization removal component (22) includes: A conical baffle (221), a spiral condensing pipe (222) is fixedly connected to the lower end of the conical baffle (221), the conical baffle (221) is fixedly connected to the output pipeline (215), the conical baffle (221) is located below the filter screen (216), a gas outlet one (2211) is opened on the conical baffle (221), a driven shaft one (223) is rotatably connected to the conical baffle (221), a gear (224) is fixedly connected to the upper end of the driven shaft one (223), the gear (224) meshes with a toothed ring (225), and a scraping rod (226) is fixedly connected to the toothed ring (225).

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

3. An exhaust gas purification device for waste acid liquid treatment according to claim 2, characterized in that: The secondary pollution prevention and control component (3) includes: An air pump (31), the air pump (31) is fixedly connected below the workbench (211), a gas outlet two (32) is fixedly connected to the workbench (211), a return cavity (33) is fixedly connected inside the purification cavity (1), the return cavity (33) is located below the air pump (31), a sealing cover (34) is fixedly connected to the return cavity (33), several 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 cavity (1), the motor (36) is fixedly connected with a bevel gear two (37), a rotating shaft (38) is rotatably connected at the axial center position of the return cavity (33), a bevel gear two (37) is fixedly connected to the lower end of the rotating shaft (38), the two bevel gears two (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 inside the return cavity (33).

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