Purification device for waste automobile exhaust catalyst

Abstract

The invention discloses a purification device for a waste automobile exhaust catalyst, and particularly relates to the technical field of automobile exhaust, the purification device comprises a base, the base is provided with a purification assembly, the purification assembly comprises a supporting frame arranged at the top of the base, one end of the supporting frame is provided with a sealing cover, and the sealing cover is internally and rotatably connected with a purification cylinder; a plurality of arc-shaped plates are arranged on the inner wall of the purification cylinder, and the vertical sections of the arc-shaped plates are arc-shaped. Through cooperation of an arc plate and precipitation teeth, when the arc plate on the inner wall of the precious metal preliminary separation and purification barrel rotates along with the barrel, materials and a strong alkali solution are efficiently stirred, carriers and impurities are promoted to be fully dissolved, a crushing wheel and the purification barrel are synchronously driven by a second motor to rotate, and the crushing wheel crushes blocky raw materials into small-particle-size particles; the contact area with a strong alkali solution is increased; and through cooperation with rotary feeding of the purification cylinder, seamless connection of crushing and feeding is achieved, and the problems that a traditional device is insufficient in raw material treatment and low in feeding efficiency are solved.

Description

Technical Field

[0001] This invention relates to the field of automotive exhaust technology, and more specifically, to a purification device for used automotive exhaust catalysts. Background Technology

[0002] Automotive exhaust catalysts are the core components of automotive exhaust treatment systems. They utilize a carrier (usually ceramic or metal honeycomb) to load precious metal active ingredients such as platinum, palladium, and rhodium to catalytically convert harmful gases such as carbon monoxide and nitrogen oxides in exhaust gases into harmless carbon dioxide, nitrogen, and water. However, under prolonged exposure to high temperatures, carbon deposits in exhaust gases, and chemical poisoning (such as corrosion from sulfur and phosphorus compounds), the activity of these precious metals gradually decreases, eventually leading to catalyst failure and the formation of "used automotive exhaust catalysts."

[0003] Currently, the disposal of spent automotive exhaust catalysts represents a significant waste of resources. Platinum, palladium, and rhodium, as scarce and precious metals, have high market value and limited reserves. Directly discarding spent catalysts would result in a substantial depletion of non-renewable resources. Furthermore, if the carriers of spent catalysts are indiscriminately landfilled, the residual harmful metals and chemicals could seep into the soil and water bodies, posing a potential threat to the ecological environment and human health. Therefore, purifying spent automotive exhaust catalysts and recovering their precious metals has the dual significance of resource recycling and environmental protection.

[0004] However, existing purification technologies still have significant shortcomings, making it difficult to meet the needs for efficient and low-cost recycling: Traditional purification processes require breaking down steps such as "raw material crushing, strong alkali soaking, and solid-liquid separation" into multiple independent devices. Raw materials need to be transferred between devices multiple times, which not only increases the complexity of operation but also extends the work cycle (8-12 hours for a single purification), making it difficult to achieve continuous production. Insufficient raw material processing and poor separation results in insufficient contact area between the raw material and the solution during subsequent strong alkali soaking, incomplete dissolution of the carrier and impurities, and low release rate of precious metal ions. At the same time, the lack of a dedicated precious metal interception structure during the soaking process causes some precious metal particles to be lost with the flow of the solution, resulting in a low recovery rate. Meanwhile, the separation process often uses fixed filter cloth filtration, and the filter cloth area is not adjustable. This can easily lead to problems such as excessively large filtration gaps causing leakage of precious metal ions or filter cloth blockage causing a sharp drop in filtration efficiency. In addition, the filter cloth has no targeted adsorption design and cannot further capture precious metal ions in the solution. Therefore, a purification device for waste automotive exhaust catalyst is provided. Summary of the Invention

[0005] In order to overcome the above-mentioned defects of the prior art, the present invention provides a purification device for waste automotive exhaust catalysts, which aims to solve the problems mentioned in the background art.

[0006] The present invention provides the following technical solution: a purification device for waste automotive exhaust catalyst, comprising a base on which a purification component is disposed; The purification assembly includes a support frame set on the top of the base, a sealing cover set at one end of the support frame, a purification cylinder rotatably connected inside the sealing cover, and a plurality of arc plates set on the inner wall of the purification cylinder. The vertical cross-sectional shape of the plurality of arc plates is set to arc shape, and a plurality of precipitation teeth are set on the arc-shaped inner wall of the arc plates for soaking the catalyst in strong alkaline solution, dissolving the carrier and impurities, and allowing the precious metal to separate between two adjacent precipitation teeth. A baffle is provided at one end of the sealing cover, and a turntable is rotatably connected to the baffle. A slide is provided on one side of the turntable, and two mounting plates are slidably connected to the slide. Several first hinge rods are hinged to the outer sides of the two mounting plates respectively. An elastic filter cloth is provided on each of two adjacent first hinge rods. The elastic filter cloth is filled with a filter element. A bidirectional lead screw is rotatably connected to the middle of the slide. The elastic filter cloth is deflected and stretched by the first hinge rods, causing the elastic filter cloth to be compressed, allowing the precious metal to enter the filter element in the form of ions for solid-liquid separation.

[0007] Optionally, in one possible implementation, a threaded sleeve plate is provided on one side of each of the two mounting plates. The threaded sleeve plate is located on the slide and slidably connected to the slide. The threaded sleeve plate is threadedly connected to a bidirectional lead screw. A plurality of second hinge rods are hinged to the outer side of the threaded sleeve plate, and one end of each second hinge rod extends to a corresponding first hinge rod and is hinged to the first hinge rod. The displacement of the threaded sleeve plate drives the displacement of the second hinge rod, thereby causing the second hinge rod to be deflected by force, which in turn drives the first hinge rod to deflect. A first motor is installed on the baffle plate by bolts. The output end of the first motor passes through the baffle plate and extends to one end of the bidirectional lead screw. The first motor drives the bidirectional lead screw to rotate, which in turn drives the displacement of the threaded sleeve plate to adjust the angle of the first hinge rod, thereby realizing the function of adjusting the unfolded area of ​​the elastic filter cloth. Optionally, in one possible implementation, a solution hopper is provided at one end of the support frame, the solution hopper is located on the top side of the sealing cover, a baffle is provided at the bottom of the solution hopper, and a crushing wheel is provided on one side of the baffle. Through holes are provided on the baffle, the solution hopper, and the purification cylinder, allowing material to be taken out through the through holes on the surface of the purification cylinder when it rotates. When the through holes are connected to the baffle and the solution hopper, a strong alkaline solution is injected into the purification cylinder. The crushing wheel is used to crush the raw material. A pulley is provided at one end of the crushing wheel and the purification cylinder, respectively. The base... A second motor is provided, and all the belt pulleys and the second motor are connected by belt drive. The slide is placed horizontally inside the purification cylinder and is detachably connected to the purification cylinder by bolts. The belt pulley is driven to rotate by the second motor via the belt. The belt pulley on the purification cylinder drives the purification cylinder and the slide to rotate, while the belt pulley at one end of the crushing wheel drives the crushing wheel to rotate. The sealing cover is provided with a maintenance cover for maintenance. A slag discharge hopper for slag discharge is provided on one side of the bottom of the sealing cover. A gas filter is provided on one side of the bottom of the support frame. A conveyor belt for material conveying is provided inside the support frame. The technical effects and advantages of this invention are as follows: 1. This invention uses a second motor to synchronously drive the crushing wheel and the purification cylinder to rotate. The crushing wheel crushes the lumpy raw material into small-diameter particles, increasing the contact area with the strong alkaline solution. Combined with the rotary feeding of the purification cylinder, it achieves seamless connection between crushing and feeding, solving the problems of insufficient raw material processing and low feeding efficiency in traditional devices, and providing a high-quality material basis for subsequent dissolution and separation processes. 2. This invention utilizes the synergy of arc plates and precipitation teeth to enhance the preliminary separation and purification of precious metals. The arc plates on the inner wall of the cylinder rotate with the cylinder, creating efficient stirring between the material and the strong alkaline solution, promoting the full dissolution of the carrier and impurities. The staggered precipitation teeth on the inner wall of the arc plates can specifically trap precious metal particles that have detached from the carrier, preventing them from being lost with the solution's agitation. This achieves preliminary separation of precious metals from impurities, providing a prerequisite for subsequent precise enrichment. 3. This invention achieves precise and efficient separation through the adjustment of elastic filter cloth and lead screw. The first motor drives the bidirectional lead screw, which in turn drives the wire sleeve plate and the hinge rod to achieve flexible adjustment of the unfolded area of ​​the elastic filter cloth, adapting to the separation needs of mixed liquids of different concentrations. The stretching and squeezing action of the elastic filter cloth, combined with the ion exchange resin filter element, can not only completely intercept solid impurities, but also efficiently adsorb precious metal ions, inherit the preliminary separation results, and greatly improve the solid-liquid separation accuracy and precious metal enrichment efficiency.

[0008] 4. This invention uses a motor-driven multi-component collaborative operation, with the slag discharge hopper accurately discharging waste slag, the maintenance cover facilitating maintenance, and the detachable slide design for convenient subsequent filter element processing, forming an integrated process of raw material conveying, crushing, purification, separation, and slag discharge; each link is closely connected, reducing manual intervention, and efficiently integrating the effects of the preceding separation process, significantly improving the automation level and overall purification efficiency of the device. Attached Figure Description

[0009] To more clearly illustrate the technical solutions in this disclosure, the accompanying drawings used in some embodiments will be briefly described below. Obviously, the drawings described below are only drawings of some embodiments of this disclosure, and those skilled in the art can obtain other drawings based on these drawings. In addition, the drawings described below can be regarded as schematic diagrams and are not intended to limit the actual size of the product, the actual flow of the method, the actual timing of the signals, etc. involved in the embodiments of this disclosure.

[0010] Figure 1 This is a front view of the overall structure of the present invention.

[0011] Figure 2 This is a side view of the overall structure of the present invention.

[0012] Figure 3 This is a schematic diagram showing the sealing cover, purification cylinder, arc plate, baffle, first motor, solution hopper and support frame of the present invention installed together.

[0013] Figure 4 This is a schematic diagram of the turntable, mounting plate, first hinge rod, bidirectional lead screw, and elastic filter cloth of the present invention.

[0014] Figure 5 For the present invention Figure 4 Side view.

[0015] Figure 6 This is a schematic diagram of the slide, mounting plate, bidirectional lead screw, first hinge rod, elastic filter cloth, and filter element of the present invention.

[0016] Figure 7 This is a schematic diagram of the sealing cover, purification cylinder, arc plate, baffle, slag discharge hopper, belt conveyor, solution hopper and partition of the present invention.

[0017] Figure 8 This is a schematic diagram of the support frame, conveyor belt, pulley, gas filter, crushing wheel, and partition of the present invention.

[0018] The attached diagram is labeled as follows: 1. Base; 2. Support frame; 3. Sealing cover; 4. Purification cylinder; 5. Arc plate; 6. Baffle; 7. Turntable; 8. Slide frame; 9. Mounting plate; 10. First hinge rod; 11. Elastic filter cloth; 12. Wire sleeve plate; 13. Bidirectional screw; 14. Second hinge rod; 15. Filter element; 16. First motor; 17. Solution hopper; 18. Crushing wheel; 19. Partition plate; 20. Inspection cover; 21. Belt pulley; 22. Second motor; 23. Slag discharge hopper; 24. Gas filter; 25. Conveyor belt. Detailed Implementation

[0019] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0020] This embodiment discloses a purification device for waste automotive exhaust catalysts, which aims to solve the technical problems of low precious metal separation efficiency, incomplete solid-liquid separation, and poor connection between raw material processing and purification processes in the existing purification process of waste automotive exhaust catalysts.

[0021] like Figure 1 , Figure 2 As shown, the purification device includes a horizontally placed base 1, which is welded from steel plates to ensure the overall stability of the device. A support frame 2, made of stainless steel, is bolted to the top of the base 1, with reserved installation space inside for assembling various functional components.

[0022] like Figure 3 , Figure 7 As shown, a sealing cover 3 is bolted to one end of the support frame 2. The sealing cover 3 is a cylindrical hollow structure, with a solution hopper 17 welded to one side of its top. The solution hopper 17 has a volume of 50L and is used to store a 40% sodium hydroxide strong alkali solution. A partition 19 is welded to the bottom of the solution hopper 17. Through holes are opened at corresponding positions of the partition 19, the solution hopper 17, and the purification cylinder 4. One-way valves are installed at the through holes to ensure that the solution flows into the purification cylinder 4 in one direction. A crushing wheel 18 is provided on one side of the partition 19. The crushing wheel 18 has a double-tooth structure and is made of wear-resistant alloy steel. It is used to crush blocky waste catalysts into particles with a particle size ≤5cm.

[0023] A purification cylinder 4 is rotatably connected to the sealed cover 3 via bearings. The purification cylinder 4 is a cylindrical structure with uniformly distributed through holes on its surface to facilitate solution flow and material contact. Several arc plates 5 are welded to the inner wall of the purification cylinder 4. The arc plates 5 are evenly distributed circumferentially along the inner wall of the purification cylinder 4, and the vertical cross-section of the arc plates 5 is concave arc-shaped with a radius of curvature that matches the inner wall of the purification cylinder 4. Several precipitation teeth are integrally formed on the arc-shaped inner wall of each arc plate 5. The precipitation teeth are triangular prisms arranged in an alternating pattern to deposit precious metal particles between adjacent precipitation teeth when the purification cylinder 4 rotates, preventing them from being lost with the solution.

[0024] like Figure 3 As shown, a baffle 6 is bolted to one end of the sealing cover 3. The baffle 6 is a circular steel plate with a diameter consistent with the outer diameter of the sealing cover 3, used to seal the opening of the purification cylinder 4. A turntable 7 is rotatably connected to the middle of the baffle 6 via a bearing. The turntable 7 is a circular plate structure, and a slide 8 is provided on one side of it. The slide 8 is a frame structure, horizontally placed inside the purification cylinder 4 and detachably connected to the purification cylinder 4 by bolts, ensuring that the slide 8 rotates synchronously with the purification cylinder 4.

[0025] like Figure 4 , Figure 5 , Figure 6 As shown, two symmetrically arranged mounting plates 9 are slidably connected to the slide 8. The mounting plates 9 are rectangular steel plates, 40cm long, 15cm wide, and 2cm thick. Several first hinge rods 10 are hinged to the outer sides of the two mounting plates 9. The first hinge rods 10 are stainless steel rods. An elastic filter cloth 11 is bolted between two adjacent first hinge rods 10. The elastic filter cloth 11 is made of polytetrafluoroethylene, which has the characteristics of strong alkali resistance and good elasticity. It is filled with a filter element 15, which is made of ion exchange resin and is used to adsorb precious metal ions.

[0026] A threaded sleeve plate 12 is provided on one side of the mounting plate 9. The threaded sleeve plate 12 is slidably engaged with the slide rail of the slide 8, and the threaded sleeve plate 12 is threadedly connected to the double-acting screw 13. The threads at both ends of the double-acting screw 13 turn in opposite directions, and the middle part is rotatably connected to the slide 8 through a bearing. Several second hinge rods 14 are also hinged to the outside of the threaded sleeve plate 12. The other end of the second hinge rod 14 is hinged to the middle part of the first hinge rod 10 at the corresponding position to form a linkage structure.

[0027] like Figure 3 As shown, a first motor 16 is bolted to the right side of the baffle 6. The first motor 16 is model Y132M-4. Its output end passes through the baffle 6 and is fixedly connected to one end of the bidirectional lead screw 13 through a coupling, which is used to drive the bidirectional lead screw 13 to rotate.

[0028] like Figure 7 , Figure 8As shown, the right end of the crushing wheel 18 and one end of the purification cylinder 4 are both keyed to a belt pulley 21. A second motor 22 is bolted to the base 1. The second motor 22 is model Y160M-6. Its output end is also keyed to a belt pulley 21. The three belt pulleys 21 are connected by a V-belt drive to realize that the second motor 22 synchronously drives the crushing wheel 18 and the purification cylinder 4 to rotate.

[0029] like Figure 1 , Figure 2 As shown, a maintenance cover 20 is bolted to the top of the sealing cover 3. The maintenance cover 20 has a semi-circular structure, which facilitates opening and maintenance of the internal components of the sealing cover 3. A slag discharge hopper 23 is welded to one side of the bottom of the sealing cover 3. The slag discharge hopper 23 has a funnel-shaped structure and is connected to a slag discharge pipe at the lower end for discharging the purified waste slag. A gas filter 24 is bolted to one side of the bottom of the support frame 2. The gas filter 24 is connected to the inside of the sealing cover 3 through a pipe for filtering harmful gases generated during the purification process. A conveyor belt 25 is also installed inside the support frame 2. The output end of the conveyor belt 25 extends above the solution hopper 17 for conveying the waste catalyst raw materials.

[0030] The specific working principle is as follows: First, the waste automotive exhaust catalyst raw material is fed onto conveyor belt 25, which then transports it, as shown in the attached diagram. Figure 7 Appendix Figure 8 As shown, the second motor 22 on the base 1 is started. The second motor 22 drives the pulley 21 at one end of the crushing wheel 18 to rotate via a belt, thereby driving the crushing wheel 18 to rotate. The crushing wheel 18 crushes the input blocky waste catalyst, decomposing it into smaller particles to increase the contact area with the strong alkaline solution and improve the soaking and dissolution efficiency.

[0031] Simultaneously, the second motor 22 synchronously drives the belt pulley 21 at one end of the purification cylinder 4 to rotate, causing the purification cylinder 4 to rotate within the sealing cover 3. When the through holes on the surface of the purification cylinder 4 align and connect with the through holes on the partition plate 19 and the solution hopper 17, the crushed granular material falls through the through holes and enters the purification cylinder 4, completing the feeding process. After feeding is completed, the purification cylinder 4 continues to rotate, and its surface through holes are misaligned with the through holes on the partition plate 19 and the solution hopper 17, thus achieving the sealing of the purification cylinder 4.

[0032] A pre-concentrated strong alkaline solution is injected into the solution hopper 17. When the purification cylinder 4 rotates again to the aligned through-hole state, the strong alkaline solution flows into the purification cylinder 4 through the through-hole until the solution covers the granular material inside the cylinder. (See attached...) Figure 3 Appendix Figure 7 As shown, the inner wall of the purification cylinder 4 is evenly distributed with several arc plates 5. The vertical cross section of each arc plate 5 is arc-shaped, and several sharp precipitation teeth are arranged at intervals on the arc-shaped inner wall.

[0033] Driven by the second motor 22, the purification cylinder 4 rotates slowly and continuously, causing the material and strong alkaline solution inside the cylinder to tumble together. As the arc plate 5 rotates with the purification cylinder 4, it stirs the material and solution, promoting full contact between the material and the strong alkaline solution, allowing the carrier ceramic or metal honeycomb structure and impurities in the material to dissolve. Simultaneously, precious metals such as platinum, palladium, and rhodium contained in the material detach from the carrier during the dissolution process, existing in the solution as ions. Under the influence of the solution's turbulence and gravity, these ions gradually accumulate between adjacent precipitation teeth, achieving preliminary separation of the precious metals from the dissolved carrier and impurities.

[0034] After soaking for the preset time, start the first motor 16 installed on the baffle 6, as shown in the attached diagram. Figure 4 Appendix Figure 5 Appendix Figure 6 As shown, the output end of the first motor 16 drives the bidirectional lead screw 13 to rotate in the middle of the slide 8. Since the lead sleeve plate 12 is threadedly connected to the bidirectional lead screw 13 and slides with the slide 8, when the bidirectional lead screw 13 rotates, it drives the two lead sleeve plates 12 to move closer to each other along the slide 8.

[0035] During the movement of the wire sleeve plate 12, the second hinge rod 14 hinged to its outer side is deflected by the thrust, which in turn causes the first hinge rod 10 hinged to it to deflect outside the mounting plate 9. Each mounting plate 9 is hinged with four first hinge rods 10, and an elastic filter cloth 11 is connected between two adjacent first hinge rods 10. The elastic filter cloth 11 is filled with a special filter element 15. As the first hinge rod 10 deflects, the elastic filter cloth 11 is stretched and unfolded, while being squeezed by the adjacent first hinge rods 10.

[0036] Under the dual action of stretching and compressing of the elastic filter cloth 11, the mixture containing precious metal ions and undissolved impurities in the purification cylinder 4 passes through the elastic filter cloth 11. The precious metal ions are adsorbed and enriched by the filter element 15, while the undissolved solid impurities are trapped on the outside of the elastic filter cloth 11, achieving solid-liquid separation and further enrichment of precious metals. By controlling the forward and reverse rotation of the first motor 16, the rotation direction of the bidirectional lead screw 13 can be adjusted, thereby controlling the movement direction of the wire sleeve plate 12, realizing the expansion and contraction of the elastic filter cloth 11. The expansion area can be adjusted according to the concentration of the mixture to ensure the separation effect.

[0037] After solid-liquid separation is completed, control the purification cylinder 4 to rotate until its bottom is aligned with the slag discharge hopper 23, as shown in the attached diagram. Figure 1 Appendix Figure 2 As shown, when the valve of the slag discharge hopper 23 is opened, the solid impurities intercepted by the elastic filter cloth 11 fall into the slag discharge hopper 23 under the action of gravity and are discharged out of the device through the slag discharge hopper 23.

[0038] Throughout the purification process, a small amount of harmful gas may be generated inside the sealed cover 3. The gas filter 24 on one side of the bottom of the support frame 2 filters and purifies the gas inside the sealed cover 3 in real time, removing harmful components before releasing it to the outside world to avoid environmental pollution.

[0039] If further processing of the filter element 15 enriched with precious metals is required, the bolts between the slide 8 and the purification cylinder 4 can be removed, and the slide 8, along with the mounting plate 9, elastic filter cloth 11, filter element 15, and other components, can be taken out of the purification cylinder 4. Simultaneously, the conveyor belt 25 within the support frame 2 can be used to transport the removed filter element 15 or other related materials, improving the material handling convenience of the device.

[0040] When the device needs to be inspected and maintained, the inspection cover 20 on the sealing cover 3 can be opened to inspect, clean or replace internal components such as the sealing cover 3 and the purification cylinder 4. The operation is convenient.

[0041] The above are merely 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 within the protection scope of the present invention.

Claims

1. A purification device for used automobile exhaust catalyst, comprising a base (1), characterized in that: The base (1) is provided with a purification assembly; The purification assembly comprises a support frame (2) provided on the top of the base (1), one end of the support frame (2) is provided with a sealing cover (3), the sealing cover (3) is rotationally connected with a purification cylinder (4) inside, the inner wall of the purification cylinder (4) is provided with a plurality of arc plates (5), the vertical section shape of the plurality of arc plates (5) is arc-shaped, and a plurality of precipitation teeth are arranged on the arc-shaped inner wall of the arc plate (5), which are used for soaking catalyst, dissolving carrier and impurities in strong alkali solution, and separating noble metals between adjacent two precipitation teeth. One end of the sealing cover (3) is provided with a baffle (6), the baffle (6) is rotationally connected with a rotating disc (7), one side of the rotating disc (7) is provided with a sliding frame (8), and two mounting plates (9) are slidingly connected on the sliding frame (8), a plurality of first hinged rods (10) are hinged on the outer sides of the two mounting plates (9), respectively, and the adjacent two first hinged rods (10) are provided with elastic filter cloths (11), respectively, the elastic filter cloths (11) are filled with filter cores (15), and the middle part of the sliding frame (8) is rotationally connected with a bidirectional screw rod (13), the elastic filter cloths (11) are stretched and deflected by the first hinged rods (10) to make the elastic filter cloths (11) be extruded, so that the noble metal in the form of ions enters the filter core (15), and solid-liquid separation is used.

2. The purification device for the exhaust catalyst of the used car according to claim 1, characterized in that: One side of each of the two mounting plates (9) is provided with a silk sleeve plate (12), and the silk sleeve plate (12) is located on the sliding frame (8) and is slidingly connected with the sliding frame (8).

3. The purification device for the exhaust catalyst of the used car according to claim 2, characterized in that: The silk sleeve plate (12) is threadedly connected with the bidirectional screw rod (13), a plurality of second hinged rods (14) are hinged on the outer side of the silk sleeve plate (12), and one end of each of the second hinged rods (14) extends to and is hinged with the corresponding first hinged rod (10).

4. The purification device for the exhaust catalyst of the used car according to claim 1, characterized in that: The baffle (6) is provided with a first motor (16) mounted through bolts, and the output end of the first motor (16) penetrates the baffle (6) and extends to one end of the bidirectional screw rod (13).

5. The purification device for the exhaust catalyst of the used car according to claim 1, characterized in that: One end of the support frame (2) is provided with a solution hopper (17), and the solution hopper (17) is located on one side of the top of the sealing cover (3).

6. The purification device for the exhaust catalyst of the used car according to claim 5, characterized in that: The bottom of the solution hopper (17) is provided with a partition plate (19), one side of the partition plate (19) is provided with a crushing wheel (18), and through holes are formed in the partition plate (19), the solution hopper (17) and the purification cylinder (4).

7. The purification device for the exhaust catalyst of the used car according to claim 6, characterized in that: One end of the crushing wheel (18) and the purification cylinder (4) is respectively provided with a belt disc (21), the base (1) is provided with a second motor (22), and each of the belt discs (21) and the second motor (22) is drivingly connected through a belt, and the sliding frame (8) is transversely arranged in the purification cylinder (4) and is detachably connected with the purification cylinder (4) through bolts.

8. The purification device for the exhaust catalyst of the old car according to claim 1, characterized in that: The sealing cover (3) is provided with an inspection cover (20) for inspection, one side of the bottom of the sealing cover (3) is provided with a residue discharge hopper (23) for discharging residue, one side of the bottom of the support frame (2) is provided with a gas filter (24), and the support frame (2) is provided with a conveying belt (25) for conveying materials.

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