Air purification device for chemical raw material preparation

Abstract

The invention belongs to the technical field of air purification devices, and particularly relates to an air purification device for chemical raw material preparation, which comprises a tower body, an exhaust pipe for discharging standard gas and a silk screen for removing aerosol in the gas, and the silk screen is mounted in the exhaust pipe. A spraying layer and a filler layer which are used for chemically neutralizing waste gas are also arranged in the tower body; and cleaning assemblies are arranged on the two sides of the silk screen correspondingly, and the two cleaning assemblies are symmetrically distributed. During cleaning, the flushing pipe sprays water to the silk screen for flushing; and meanwhile, the two groups of cleaning seats move on the two sides of the silk screen, so that continuous and flexible mechanical shearing force is applied to the surface of the silk screen by the uniformly distributed rollers, and a hard crystal layer embedded and combined with silk screen fibers can be effectively crushed and stripped. On-line collaborative cleaning of mechanical scraping and hydraulic cleaning is achieved, and the hard scale removal rate is remarkably increased. Therefore, manpower and shutdown are reduced, the purification treatment effect on waste gas during preparation of chemical raw materials is ensured, and the production continuity is ensured.

Description

Technical Field

[0001] This invention belongs to the field of air purification device technology, specifically an air purification device for the preparation of chemical raw materials. Background Technology

[0002] The preparation, storage, and filling of raw materials such as hydrogen peroxide and glacial acetic acid generate large amounts of process waste gas containing acidic, oxidizing, and volatile organic compounds. Currently, the industry commonly uses "spray absorption towers" as the core purification unit, utilizing alkaline solutions to chemically neutralize the acidic gases. However, the spraying process itself generates a large amount of "secondary aerosols," primarily composed of alkaline solutions and reaction products (such as sodium acetate). To remove these aerosols and prevent visible plume emissions and corrosion of downstream equipment, installing wire mesh demisters at the top of the spray tower has become standard practice.

[0003] Existing technical solutions typically rely on online rinsing systems to maintain the smooth operation of wire mesh demisters. The conventional approach is to install fixed or rotating spray pipes above the wire mesh and periodically rinse it with clean water in order to wash away contaminants adhering to the surface of the wire mesh.

[0004] However, in actual operation, especially when treating easily crystallizing chemical waste gases such as sodium acetate, the hard scale layers, such as sodium acetate crystals, form a strong chemical bond and physical embedding with the wire mesh fibers through crystallization force. The shear force of the water flow alone is far from sufficient to break down and peel off these scale layers. Furthermore, hard scale often accumulates at the intersections of the wires, making it difficult for the water flow to effectively penetrate and act on the entire scale layer. This necessitates frequent unplanned shutdowns to disassemble the entire wire mesh module for offline chemical soaking and cleaning. This not only results in high maintenance costs and a harsh working environment but also severely impacts the continuity and economic efficiency of production.

[0005] Therefore, the present invention provides an air purification device for the preparation of chemical raw materials. Summary of the Invention

[0006] In order to overcome the shortcomings of the prior art, at least one technical problem raised in the background art is solved.

[0007] The technical solution adopted by the present invention to solve its technical problem is: an air purification device for chemical raw material preparation according to the present invention includes a tower body, an exhaust pipe for discharging qualified gas and a wire mesh for removing aerosols in the gas, wherein the wire mesh is installed in the exhaust pipe, and the tower body is also provided with a spray layer and a packing layer for chemically neutralizing the waste gas. Cleaning components are provided on both sides of the wire mesh, and the two sets of cleaning components are symmetrically distributed. The cleaning assembly includes a cleaning seat and rollers. The cleaning seat is slidably installed inside the exhaust pipe. Two rows of rollers are provided on the side of the cleaning seat near the wire mesh. The two rows of rollers are arranged longitudinally and equidistantly along the outer wall of the cleaning seat. The cleaning seat is uniformly provided with flushing pipes, and each flushing pipe is connected to the other by a connecting pipe that passes through the top of the cleaning seat and extends outward.

[0008] The cleaning seat is threaded with a first reciprocating screw, which is rotatably installed inside the exhaust pipe. A motor is installed at one end of the first reciprocating screw.

[0009] Each of the rollers is externally mounted with a mounting bracket, and each mounting bracket is slidably mounted within the cleaning seat; A movable plate is elastically mounted inside the cleaning seat by a spring, and the movable plate is located at one end of the mounting frame.

[0010] Each of the mounting brackets is embedded with a movable seat, and each of the movable seats is slidably mounted in the cleaning seat; Each column of the movable seats is provided in two sets, and both sets of movable seats are threadedly installed on the outside of the second reciprocating screw. The second reciprocating screw is rotatably installed in the cleaning seat. A first gear is fixedly installed on the top of the second reciprocating screw. A first rack plate is meshed on one side of the first gear. The first rack plate is fixedly installed in the exhaust pipe.

[0011] Both sides of the mounting bracket are provided with a first protective plate, and both first protective plates are slidably installed on the outer wall of the cleaning seat.

[0012] Both sets of mounting brackets are fixedly connected by connecting plates. The two connecting plates are slidably mounted on both ends of the movable plate. A cam is provided on one side of each end of the movable plate. Both cams are fixedly mounted on the outer wall of the second reciprocating lead screw.

[0013] A slag discharge plate is provided on the bottom side of the cleaning seat near the wire mesh, and the slag discharge plate is slidably installed in the slag discharge trough.

[0014] A slider is fixedly connected to one side of the slag discharge plate. The slider is slidably installed in the cleaning seat. A threaded rod is threadedly connected to the slider. A second gear is fixedly connected to the top of the threaded rod. A third gear meshes with one side of the second gear. A rotating shaft is fixedly installed inside the third gear. A second rack plate meshes with one side of the third gear. The second rack plate is slidably installed in the cleaning seat.

[0015] The beneficial effects of this invention are as follows: 1. The air purification device for chemical raw material preparation described in this invention fundamentally solves the clogging problem caused by the firm adhesion of hard crystals such as sodium acetate in spray tower wire mesh demisters by synergistic cleaning with a movable cleaning seat and elastic rollers. Traditional online flushing water flow cannot break the chemical bond and physical interlocking between crystals and wire mesh fibers. However, this invention abandons the idea of ​​simply relying on water rinsing and creatively introduces a flexible mechanical peeling force. The cleaning seat drives a row of rollers to slide on both sides of the wire mesh. The rollers, supported by springs, continuously apply a close and uniform rolling pressure and shearing force to the surface of the wire mesh. This method of action can effectively "crush" and "scrape off" brittle hard crystal layers, especially for the dirt accumulation points at the intersections of the wires, where the physical contact of the rollers can reach areas that water flow cannot penetrate. Meanwhile, the synchronous flushing pipe linked with the cleaning seat can immediately flush away the loosened scale particles, realizing online coordination of "mechanical scraping and hydraulic cleaning". This significantly improves the online removal rate of hard scale without disassembling the wire mesh module, significantly reduces unplanned downtime for cleaning, and ensures the continuity and economy of chemical production.

[0016] 2. The air purification device for chemical raw material preparation described in this invention further upgrades the cleaning process from simple "scraping" to a highly efficient "dynamic composite cleaning process" by incorporating a second reciprocating screw mechanism driven by a first rack and pinion and a first gear, as well as a cam-spring assembly with instantaneous striking function. The movement of the cleaning seat is converted into the rotation of the second reciprocating screw, which controls the movement of the roller array, through the transmission of the first rack and pinion and the first gear. This drives the upper and lower sets of rollers to perform continuous, opposite, or reciprocating motions on the wire mesh surface. This dynamic alternating relative motion creates a cyclical "scrubbing" effect on the scale layer, which can more thoroughly disintegrate the crystalline structure from multiple directions. More importantly, the cam driven by the same transmission system periodically compresses and releases the spring, causing the entire roller array to generate high-frequency, micro-amplitude instantaneous striking on the wire mesh. This impact energy can be transmitted to the interior of the hard scale, effectively cracking its microscopic interface with the fibers. This organic combination of "dynamic scrubbing" and "instantaneous impact" constitutes a composite cleaning strategy of breaking down and then cleaning, which greatly enhances the ability to tackle the most stubborn crystalline layers, bringing the efficiency and thoroughness of online maintenance to a whole new level. Attached Figure Description

[0017] The invention will now be further described with reference to the accompanying drawings.

[0018] Figure 1 This is a perspective view of the present invention; Figure 2 This is a sectional view of the present invention; Figure 3 In this invention Figure 2 Enlarged view of a portion of point A in the middle; Figure 4This is a cross-sectional view of the exhaust pipe in this invention; Figure 5 This is a schematic diagram of the cleaning seat in this invention; Figure 6 This is a cross-sectional view of the cleaning seat in this invention; Figure 7 This is a schematic diagram of the roller structure in this invention; Figure 8 In this invention Figure 7 Enlarged view of a section at point B in the middle; Figure 9 This is a schematic diagram of the slag discharge plate in this invention.

[0019] In the diagram: 1. Tower body; 11. Exhaust pipe; 12. Wire mesh; 2. Cleaning seat; 21. Roller; 22. Mounting bracket; 23. Connecting plate; 24. First reciprocating screw; 25. Motor; 26. Slag discharge trough; 211. Moving seat; 212. Second reciprocating lead screw; 213. First gear; 214. First rack plate; 215. Cam; 216. Moving plate; 217. Spring; 218. First protective plate; 219. Connecting block; 3. Connecting pipe; 31. Flushing pipe; 4. Slag discharge plate; 41. Sliding block; 42. Threaded rod; 43. Second gear; 44. Third gear; 45. Rotating shaft; 46. Second rack plate; 461. Limiting plate; 411. Second protective plate. Detailed Implementation

[0020] To make the technical means, creative features, objectives and effects of this invention easier to understand, the invention will be further described below in conjunction with specific embodiments.

[0021] like Figures 1 to 9 As shown, an air purification device for preparing chemical raw materials according to an embodiment of the present invention includes a tower body 1, an exhaust pipe 11 for discharging qualified gas, and a wire mesh 12 for removing aerosols from the gas. The wire mesh 12 is installed inside the exhaust pipe 11. The tower body 1 is also provided with a spray layer and a packing layer for chemically neutralizing the waste gas. Cleaning components are provided on both sides of the wire mesh 12, and the two sets of cleaning components are symmetrically distributed. The cleaning assembly includes a cleaning seat 2 and rollers 21. The cleaning seat 2 is slidably installed in the exhaust pipe 11. Two rows of rollers 21 are provided on the side of the cleaning seat 2 near the wire mesh 12. The two rows of rollers 21 are arranged longitudinally and equidistantly along the outer wall of the cleaning seat 2. The cleaning seat 2 is evenly provided with flushing pipes 31, and each flushing pipe 31 is connected to the other by a connecting pipe 3. The connecting pipe 3 passes through the top of the cleaning seat 2 and extends outward.

[0022] The end of the connecting pipe 3 furthest from the cleaning seat 2 is connected to an external water pump via a flexible pipe; During cleaning, water is supplied to the connecting pipe 3 by an external water pump, so that the rinsing pipe 31 sprays water onto the wire mesh 12 for rinsing. Simultaneously, the two sets of cleaning seats 2 move on both sides of the wire mesh 12, so that the evenly distributed rollers 21 apply a continuous, flexible mechanical shearing force to the surface of the wire mesh 12, which can effectively break and peel off the hard crystalline layer (such as sodium acetate) embedded with the fibers of the wire mesh 12. Furthermore, the water jet sprayed synchronously from the flushing pipe 31 can immediately wash away the loosened scale particles and cool and lubricate the contact surface, realizing online coordinated cleaning of "mechanical scraping - hydraulic transport," significantly improving the hard scale removal rate. This reduces manual labor and downtime, ensuring the purification effect of waste gas during chemical raw material preparation, thereby ensuring production continuity.

[0023] A slag discharge trough 26 is provided on one side of the cleaning seat 2, and the slag discharge trough 26 is located at the bottom of the wire mesh 12. A slag discharge pipe is installed at the end of the slag discharge trough 2 away from the cleaning seat 2, and a control valve is provided on the slag discharge pipe. The scraped-off hard scale and impurities and the flushing wastewater flow downward into the slag discharge trough 26 and can be discharged through the slag discharge pipe.

[0024] On one side of the inner wall of the exhaust pipe 11, and on both sides of the wire mesh 12, there are grooves for the cleaning seat 2 to rest in. When the cleaning component is not working, the cleaning component is located in the groove. When the exhaust gas flows through the wire mesh 12, it will hardly directly impact or flow around the cleaning seat 2 and its protruding parts, thereby minimizing gas resistance (pressure drop) and the resulting eddies and energy consumption. Furthermore, during non-cleaning periods, the rate of corrosion, scaling, and wear of components installed on the cleaning seat 2 is minimized as much as possible, thereby improving the reliability and durability of the entire cleaning system.

[0025] like Figure 3 and 5 As shown, a first reciprocating screw 24 is installed on the internal thread of the cleaning seat 2. The first reciprocating screw 24 is rotatably installed in the exhaust pipe 11, and a motor 25 is installed at one end of the first reciprocating screw 24.

[0026] like Figures 5 to 8 As shown, each roller 21 is equipped with a mounting bracket 22 on its exterior, and each mounting bracket 22 is slidably installed inside the cleaning seat 2; A movable plate 216 is elastically mounted inside the cleaning seat 2 via a spring 217, and the movable plate 216 is located at one end of the mounting bracket 22.

[0027] During the cleaning process, if particularly hard dirt is encountered, the elastic potential energy of the spring 217 allows the roller 21 to elastically extend and retract, which acts as a buffer stroke to absorb the instantaneous impact force and prevent the impact force from being directly and rigidly transmitted to the cleaning seat 2 and even the support frame of the wire mesh 12. This helps to buffer the impact and vibration and protect the equipment structure.

[0028] like Figures 5 to 8 As shown, each mounting bracket 22 has a movable seat 211 embedded in it, and each movable seat 211 is slidably installed in the cleaning seat 2; Each set of movable seats 211 is configured as two sets. Both sets of movable seats 211 are threaded onto the outside of the second reciprocating screw 212. The second reciprocating screw 212 is rotatably installed in the cleaning seat 2. The top of the second reciprocating screw 212 is fixedly installed with a first gear 213. One side of the first gear 213 is meshed with a first rack plate 214. The first rack plate 214 is fixedly installed in the exhaust pipe 11.

[0029] Two threads are symmetrically distributed on the outer wall of the second reciprocating screw 212. The two threads respectively mesh with two sets of moving seats 211 to make the two sets of moving seats 211 move relative to each other. The two sets of movable seats 211 are separated from the middle of the cleaning seat 2, and are divided into upper and lower parts.

[0030] During cleaning, the movement of the cleaning seat 2 causes the first gear 213 to slide within the exhaust pipe 11. The first gear 213 meshes with the first rack plate 214 and rotates. The rotation of the first gear 213 drives the second reciprocating screw 212 to rotate. When the second reciprocating screw 212 rotates, the two sets of moving seats 211 move relative to each other. The two sets of moving seats 211 drive the rollers 21 to move relative to each other through the mounting frame 22, so that the rollers 21 in each row on the outer wall of the cleaning seat 2 move continuously outward and inward with the middle of the cleaning seat 2 as the dividing line. Unlike traditional unidirectional rolling or static extrusion, the reciprocating motion of the upper and lower sets of rollers 21 in opposite directions creates a dynamic and cyclical composite shear force on the hard crystalline layer (such as sodium acetate) on the surface of the wire mesh 12.

[0031] This continuous alternating relative motion can more effectively break the bond between the crystals and the fibers of the mesh 12 from different directions, much like a "scrubbing" action. For hard, firmly attached dirt layers, its breaking and peeling efficiency is far higher than that of a single set of rollers 21 or a fixed-direction cleaning method.

[0032] During a single movement of the cleaning seat 2, the relative motion of the two sets of rollers 21 creates multiple dynamic cleaning points within the same vertical area of ​​the wire mesh 12, significantly increasing the coverage and frequency of cleaning on the surface of the wire mesh 12 per unit time. This achieves more uniform and thorough cleaning in a shorter operation time, improving the efficiency of online maintenance.

[0033] like Figures 5 to 8 As shown, both sides of the mounting bracket 22 are provided with first protective plates 218, and both first protective plates 218 are slidably installed on the outer wall of the cleaning seat 2.

[0034] The cleaning seat 2 has a first sliding groove for the mounting bracket 22 to slide, and the first protective plate 218 is located at the opening of the first sliding groove, and the two are slidably connected. The first protective plate 218 protects the first chute, preventing the rinsing water and scraped-off impurities from entering the first chute.

[0035] like Figures 5 to 8 As shown, the two sets of mounting brackets 22 are fixedly connected by connecting plates 23. The two connecting plates 23 are slidably installed at both ends of the movable plate 216. A cam 215 is provided on one side of both ends of the movable plate 216. The two cams 215 are fixedly installed on the outer wall of the second reciprocating screw 212.

[0036] During the cleaning process, the rotation of the second reciprocating screw 212 drives the rotation of the cam 215. When the convex part of the cam 215 rotates towards the moving plate 216, it drives the moving plate 216 to move away from one side. At the same time, the spring 217 deforms under force and stores elastic potential energy. When the convex part of the cam 215 separates from the moving plate 216, the elastic potential energy is released through the spring 217, causing the moving plate 216 to move back to its original position. When the moving plate 216 moves, it drives the two sets of mounting brackets 22 and rollers 21 to move towards the side closer to the wire mesh 12 through the two connecting plates 23. This causes the rollers 21 to generate instantaneous, directional mechanical impact energy on the surface of the wire mesh 12. This high-frequency, micro-amplitude "tapping" action can be effectively transmitted to the interior of the crystalline layer, physically cracking and loosening the microstructure of hard crystals such as sodium acetate that are tightly bound to the fibers of the wire mesh 12. This creates favorable conditions for the subsequent rolling and scraping of the rollers 21, significantly improving the cleaning system's ability to tackle the most stubborn dirt.

[0037] By combining "instantaneous tapping" with "continuous rolling scraping," a composite cleaning process is formed that breaks down the scale first and then cleans it, achieving synergistic effects. The tapping action is responsible for breaking down and loosening the main structure of the hard scale layer, while the roller 21 is responsible for peeling and removing the loosened scale particles from the surface of the wire mesh 12. The functions of the two are clearly defined and the order is reasonable, achieving a cleaning effect of 1+1>2.

[0038] The inwardly bent portions at both ends of the movable plate 216 accommodate the connecting plate 23, and a second sliding groove is formed within the bent portion for the connecting plate 23 to slide. This allows the movable plate 216 to drive the connecting plate 23 to move laterally without affecting the longitudinal movement of the connecting plate 23 itself.

[0039] The mounting bracket 22 has a third sliding groove. The width of the inner wall of the third sliding groove is slightly larger than the width of the inner wall of the second reciprocating screw 212. The second reciprocating screw 212 and the mounting bracket 22 are slidably connected.

[0040] When the moving plate 216 moves and drives the mounting bracket 22 to move via the connecting plate 23, the mounting bracket 22 slides on the outer wall of the moving seat 211 and the second reciprocating screw 212.

[0041] Connecting blocks 219 are fixedly installed on both sides of the mounting bracket 22. The connecting blocks 219 are slidably installed inside the first protective plate 218. The connecting blocks 219 are T-shaped.

[0042] The first protective plate 218 is slidably connected to the outer wall of the cleaning seat 2. The two are connected by a T-shaped slide rail, so that the first protective plate 218 is protected by the first slide rail.

[0043] like Figure 4 , Figure 5 , Figure 6 and Figure 9 As shown, a slag discharge plate 4 is provided on the bottom side of the cleaning seat 2 near the wire mesh 12, and the slag discharge plate 4 is slidably installed in the slag discharge trough 26.

[0044] During the cleaning process, the movement of the cleaning seat 2 causes the slag discharge plate 4 to slide in the slag discharge trough 26, pushing the wastewater and impurities in the slag discharge trough 26 towards the slag discharge pipe, realizing the fully automated synchronization of "cleaning-collection-transfer", which greatly improves the continuity and efficiency of the operation.

[0045] like Figure 9 As shown, a slider 41 is fixedly connected to one side of the slag discharge plate 4. The slider 41 is slidably installed in the cleaning seat 2. A threaded rod 42 is threadedly connected to the slider 41. A second gear 43 is fixedly connected to the top of the threaded rod 42. A third gear 44 is meshed on one side of the second gear 43. A rotating shaft 45 is fixedly installed inside the third gear 44. A second rack plate 46 is meshed on one side of the third gear 44. The second rack plate 46 is slidably installed in the cleaning seat 2.

[0046] One end of the second rack plate 46 passes through the cleaning seat 2 and extends outward. When the cleaning seat 2 moves to the inner wall of the exhaust pipe 11, the penetrating end of the second rack plate 46 contacts the inner wall and slides into the cleaning seat 2 under force, while the other end passes through the other side of the cleaning seat 2. When the cleaning seat 2 moves, the slag discharge plate 4 slides in the slag discharge trough 26, scraping the wastewater and impurities in the slag discharge trough 26 toward the slag discharge pipe and discharging them from the device. When the cleaning seat 2 moves to one side of the inner wall of the exhaust pipe 11, the end of the second rack plate 46 slides into the cleaning seat 2. The movement of the second rack plate 46 drives the third gear 44 to rotate, the rotation of the third gear 44 drives the second gear 43 to rotate, the rotation of the second gear 43 drives the threaded rod 42 to rotate, and the rotation of the threaded rod 42 drives the slider 41 to move. The movement of the slider 41 drives the slag discharge plate 4 to move, so that the slag discharge plate 4 moves upward from the slag discharge trough 26, so that the slag discharge plate 4 is not in the slag discharge trough 26 when the cleaning seat 2 returns. This avoids the waste that has been pushed to the slag discharge pipe being brought back in the opposite direction or unnecessary friction in the empty trough during the return stroke. This ensures the purity of the slag discharge effect and significantly reduces the mechanical wear of the slag discharge plate 4 and the slag discharge trough 26, extending the service life of key moving parts.

[0047] The slag discharge plate 4 performs a one-way pushing function within the slag discharge trough 26, ensuring that the waste residue is continuously and without backflow pushed towards the slag discharge pipe. The action has a single target and maximizes efficiency.

[0048] When the cleaning seat 2 returns to the other side of the inner wall of the exhaust pipe 11, similarly, when the second rack plate 46 moves, the slag discharge plate 4 moves down and re-embeds into the slag discharge groove 26 to perform slag discharge operation.

[0049] The cleaning seat 2 has a fourth sliding groove for sliding the slider 41. A second protective plate 411 is slidably installed at the opening of the fourth sliding groove. The second protective plate 411 is fixedly installed on the top of the slag discharge plate 4.

[0050] The fourth chute is shielded by the second protective plate 411 to prevent rinsing wastewater and scraped impurities from entering.

[0051] A limiting plate 461 is fixedly installed on the outer wall of the second rack plate 46. The limiting plate 461 is slidably installed in the cleaning seat 2. The cleaning seat 2 is provided with a fifth sliding groove for the limiting plate 461 to slide. Both sides of the inner wall of the fifth sliding groove are magnetically connected to the limiting plate 461. When the second rack plate 46 moves, the magnetic connection of the inner wall of the limiting plate 461 can improve the stability and reliability of the connection between the two and prevent the second rack plate 46 from shaking.

[0052] The inner diameter of the third gear 44 is larger than that of the second gear 43, which can increase the transmission speed of the second gear 43.

[0053] Working principle: During cleaning, water is supplied to the connecting pipe 3 by an external water pump, so that the rinsing pipe 31 sprays water onto the wire mesh 12 for rinsing. Simultaneously, the motor 25 drives the first reciprocating screw 24 to rotate. The rotation of the first reciprocating screw 24 causes the cleaning seat 2 to move within the exhaust pipe 11, so that the two sets of cleaning seats 2 move simultaneously on both sides of the wire mesh 12. This allows the evenly distributed rollers 21 to apply a continuous and flexible mechanical shearing force to the surface of the wire mesh 12, effectively breaking and peeling off the hard crystalline layer embedded with the fibers of the wire mesh 12. Furthermore, the water jet simultaneously sprayed from the flushing pipe 31 can immediately wash away the loosened scale particles. The scraped-off hard scale impurities and the flushed wastewater flow downwards into the slag discharge tank 26 and are discharged through the slag discharge pipe.

[0054] Simultaneously, the movement of the cleaning seat 2 causes the first gear 213 to slide within the exhaust pipe 11. The first gear 213 meshes with the first rack plate 214 and rotates. The rotation of the first gear 213 drives the second reciprocating screw 212 to rotate. When the second reciprocating screw 212 rotates, the two sets of moving seats 211 move relative to each other. The two sets of moving seats 211 drive the rollers 21 to move relative to each other through the mounting bracket 22, so that the rollers 21 in each row on the outer wall of the cleaning seat 2 continuously move outward and inward with the middle of the cleaning seat 2 as the dividing line. This forms a dynamic and cyclical composite shear force on the hard crystalline layer on the surface of the wire mesh 12.

[0055] Simultaneously, the rotation of the second reciprocating screw 212 drives the rotation of the cam 215. When the convex part of the cam 215 rotates towards the moving plate 216, it drives the moving plate 216 to move away from one side. At the same time, the spring 217 deforms under force and stores elastic potential energy. When the convex part of the cam 215 separates from the moving plate 216, the elastic potential energy is released through the spring 217, causing the moving plate 216 to move back to its original position. When the moving plate 216 moves, it drives the two sets of mounting brackets 22 and rollers 21 to move towards the side closer to the wire mesh 12 through the two connecting plates 23. This causes the rollers 21 to generate instantaneous, directional mechanical impact energy on the surface of the wire mesh 12. Physically, this cracks and loosens the microstructure of hard crystals such as sodium acetate that are tightly bonded to the fibers of the wire mesh 12.

[0056] Simultaneously, the movement of the cleaning seat 2 causes the slag discharge plate 4 to slide within the slag discharge trough 26, pushing the wastewater and impurities in the slag discharge trough 26 towards the slag discharge pipe. When the cleaning seat 2 moves to the inner wall of the exhaust pipe 11, the end of the second rack plate 46 slides into the cleaning seat 2. The movement of the second rack plate 46 causes the third gear 44 to rotate, which in turn causes the second gear 43 to rotate. The rotation of the second gear 43 causes the threaded rod 42 to rotate, which in turn causes the slider 41 to move. The movement of the slider 41 causes the slag discharge plate 4 to move, moving the slag discharge plate 4 upward from the slag discharge trough 26. This ensures that the slag discharge plate 4 is not in the slag discharge trough 26 during the return stroke of the cleaning seat 2. Similarly, when the cleaning seat 2 moves back to the other side of the inner wall of the exhaust pipe 11, the second rack plate 46 moves downward and re-embeds the slag discharge plate 4 into the slag discharge trough 26 to perform the slag discharge operation.

[0057] The terms "front," "back," "left," "right," "top," and "bottom" all refer to the figures in the accompanying drawings. Figure 1 Based on the perspective of the observer, the side of the device facing the observer is defined as the front, the left side of the observer is defined as the left, and so on.

[0058] In the description of this invention, it should be understood that the terms "center", "longitudinal", "lateral", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limiting the scope of protection of this invention.

[0059] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the present invention as claimed. The scope of protection of the present invention is defined by the appended claims and their equivalents.

Claims

1. An air purification device for preparing chemical raw materials, comprising a tower body (1), an exhaust pipe (11) for discharging qualified gas, and a wire mesh (12) for removing aerosols from the gas, wherein the wire mesh (12) is installed inside the exhaust pipe (11), and the tower body (1) is further provided with a spray layer and a packing layer for chemically neutralizing the waste gas; Its features are: Cleaning components are provided on both sides of the wire mesh (12), and the two sets of cleaning components are symmetrically distributed. The cleaning assembly includes a cleaning seat (2) and rollers (21). The cleaning seat (2) is slidably installed in the exhaust pipe (11). Two rows of rollers (21) are provided on the side of the cleaning seat (2) near the wire mesh (12). The two rows of rollers (21) are arranged longitudinally and equidistantly along the outer wall of the cleaning seat (2). The cleaning seat (2) is uniformly provided with flushing pipes (31), and each flushing pipe (31) is connected to the other through a connecting pipe (3). The connecting pipe (3) passes through the top of the cleaning seat (2) and extends outward.

2. The air purification device for chemical raw material preparation according to claim 1, characterized in that: The cleaning seat (2) is threaded with a first reciprocating screw (24), which is rotatably installed in the exhaust pipe (11). A motor (25) is installed at one end of the first reciprocating screw (24).

3. The air purification device for chemical raw material preparation according to claim 2, characterized in that: Each of the rollers (21) is externally mounted with a mounting bracket (22), and each mounting bracket (22) is slidably mounted inside the cleaning seat (2); A movable plate (216) is elastically installed inside the cleaning seat (2) by a spring (217), and the movable plate (216) is located at one end of the mounting bracket (22).

4. The air purification device for chemical raw material preparation according to claim 3, characterized in that: Each of the mounting brackets (22) is embedded with a movable seat (211), and each of the movable seats (211) is slidably mounted in the cleaning seat (2); Each column of the movable seat (211) is provided in two sets. Both sets of the movable seat (211) are threaded on the outside of the second reciprocating screw (212). The second reciprocating screw (212) is rotatably installed in the cleaning seat (2). The top of the second reciprocating screw (212) is fixedly installed with a first gear (213). One side of the first gear (213) is meshed with a first rack plate (214). The first rack plate (214) is fixedly installed in the exhaust pipe (11).

5. An air purification device for preparing chemical raw materials according to claim 3, characterized in that: Both sides of the mounting bracket (22) are provided with first protective plates (218), and both first protective plates (218) are slidably installed on the outer wall of the cleaning seat (2).

6. The air purification device for chemical raw material preparation according to claim 4, characterized in that: The two sets of mounting brackets (22) are fixedly connected by connecting plates (23). The two connecting plates (23) are slidably installed at both ends of the moving plate (216). A cam (215) is provided on one side of both ends of the moving plate (216). The two cams (215) are fixedly installed on the outer wall of the second reciprocating screw (212).

7. An air purification device for preparing chemical raw materials according to claim 1, characterized in that: The bottom of the cleaning seat (2) is provided with a slag discharge plate (4) on the side near the wire mesh (12), and the slag discharge plate (4) is slidably installed in the slag discharge trough (26).

8. An air purification device for preparing chemical raw materials according to claim 7, characterized in that: A slider (41) is fixedly connected to one side of the slag discharge plate (4). The slider (41) is slidably installed in the cleaning seat (2). A threaded rod (42) is threadedly connected to the slider (41). A second gear (43) is fixedly connected to the top of the threaded rod (42). A third gear (44) meshes with one side of the second gear (43). A rotating shaft (45) is fixedly installed inside the third gear (44). A second rack plate (46) meshes with one side of the third gear (44). The second rack plate (46) is slidably installed in the cleaning seat (2).

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