Method and device for stripping and recycling plate-type catalyst active particles by shot blasting method

Abstract

The invention discloses a method and device for stripping and recycling plate type catalyst active particles through a shot peening method, the device comprises a bin body, a catalyst clamping system, a pellet collecting chamber and an active particle collecting chamber are arranged in the bin body from top to bottom, and the catalyst clamping system is used for clamping a catalyst metal framework; the shot blasting machines are arranged on the two opposite sides of the bin body, and the spraying ends of the shot blasting machines face the catalyst metal framework; one end of the pellet conveying device is connected with the pellet collecting chamber, and the other end is connected with the shot blasting machine; wherein the shot blasting machine is used for spraying pellets to the catalyst metal framework, so that active particles are stripped from the metal framework. Under impact vibration, active particles are selectively stripped, falling particles and pellets fall together, physical screening separation is achieved through grating holes, the pellets are circularly conveyed back to a shot blasting machine through a conveying device for continuous operation, efficient, low-loss and high-purity resource recycling is achieved, meanwhile, automatic continuous operation is supported, and industrial application feasibility is remarkably improved.

Description

Technical Field

[0001] This invention belongs to the field of catalyst stripping technology, specifically relating to a method and apparatus for stripping and recovering active particles of plate catalysts by shot peening. Background Technology

[0002] Plate-type SCR catalysts are widely used in industrial flue gas denitrification treatment. Their structural design, featuring a metal support framework and active material coating, offers advantages such as high activity, wear resistance, and anti-clogging properties. However, after long-term operation, catalyst performance deteriorates due to poisoning, sintering, or fly ash accumulation, necessitating replacement. Both the metal mesh framework and active particles in spent catalysts possess high recycling value; therefore, efficiently and cleanly separating the active particles from the metal framework is crucial for resource utilization. Existing technologies include various separation methods such as roller pressing, crushing and sorting, and tensile deformation. Roller pressing, combined with vibration, offers low energy consumption but low efficiency. Crushing and sorting, involving mechanical crushing followed by magnetic separation, is fast but energy-intensive and prone to introducing iron impurities. Tensile deformation utilizes the ductility of the metal mesh to detach active particles, achieving high purity but damaging the integrity of the metal framework, thus affecting its reuse value.

[0003] The aforementioned methods generally suffer from problems such as complex operation, high energy consumption, severe damage to the metal skeleton, or insufficient purity of the recovered products, making it difficult to simultaneously meet the comprehensive requirements of high stripping rate, low energy consumption, and skeleton integrity. In particular, when large-scale recycling of large quantities of waste plate catalysts is required, existing technologies reveal significant deficiencies in processing efficiency, equipment stability, and resource utilization, necessitating a novel stripping process to overcome these technical bottlenecks. Summary of the Invention

[0004] The purpose of this invention is to provide a method and apparatus for stripping and recovering active particles of plate catalysts by shot peening, so as to solve the technical defects of existing catalyst active particle stripping methods, such as complex operation, high energy consumption, easy damage to metal skeleton or low purity of recovered particles.

[0005] The technical solution adopted in this invention is as follows: In a first aspect, a device for stripping and recovering plate-type catalyst active particles is provided, comprising: The chamber contains, from top to bottom, a catalyst clamping system, a pellet collection chamber, and an active particle collection chamber. The catalyst clamping system is used to clamp the catalyst metal skeleton. The shot peening machine is located on both sides of the chamber, with its spraying end facing the catalyst metal skeleton. The shot conveying device is connected at one end to the shot collection chamber and at the other end to the shot peening machine; Among them, the shot peening machine is used to spray spherical shot onto the catalyst metal skeleton to peel the active particles off the metal skeleton. In one alternative embodiment, the catalyst clamping system, the pellet collection chamber, and the active particle collection chamber are sequentially connected; The catalyst clamping system includes: Symmetrically arranged support bosses; The worktable is detachably connected between two support bosses; The quick-release clamp is connected to the workbench and is used to fix the plate catalyst sheet on both sides of the workbench. The plate-type catalyst sheet includes a catalyst metal framework and active particles, with the active particles uniformly distributed on the catalyst metal framework; When the shot peening machine sprays spherical pellets onto the catalyst metal skeleton, the active particles detach from the metal skeleton and fall into the active particle collection chamber. In one optional embodiment, the support boss is provided with a movable engagement clamp, which clamps both ends of the plate-type catalyst sheet. The quick-release clamps are provided in two sets, which are connected to the other two ends of the plate catalyst sheet. In one alternative embodiment, each set of quick-release clamps contains two quick-release clamps. In one alternative embodiment, the worktable and the support boss are axially perpendicular. In one alternative embodiment, the catalyst metal framework is a network structure. In one optional embodiment, a grid hole is provided between the pellet collection chamber and the active particle collection chamber, and the diameter of the grid hole is smaller than the diameter of the pellet. In one alternative embodiment, two sets of shot peening machines are provided, located at one end and the other end of the chamber. In one alternative embodiment, the number of shot peening machines in each group is two. A second aspect of this application provides a method for shot peening and recovering active particles of a plate-type catalyst, the method being carried out as described above, including: The plate catalyst sheet to be processed is fixed in the catalyst clamping system inside the chamber. The plate catalyst sheet includes a catalyst metal skeleton and active particles attached thereto. Using shot peening machines located on opposite sides of the chamber, spherical shot is sprayed onto the surface of the catalyst metal skeleton of the plate catalyst sheet, and the active particles are peeled off from the catalyst metal skeleton by the impact of the kinetic energy of the shot. After being peeled off, the active particles fall under the influence of gravity, pass through the grid holes located at the bottom of the pellet collection chamber, and enter the active particle collection chamber below to be collected. After impact, the shot falls into the shot collection chamber and is then recovered to the shot peening machine via a shot conveying device, thus realizing the recycling of the shot.

[0006] Compared with the prior art, the present invention has the following beneficial effects: By impacting the plate-shaped catalyst surface fixed in the clamping system with shot peening, the active particles are selectively stripped under impact vibration, taking advantage of the mechanical difference between the high brittleness of the active particles and the good elasticity of the metal skeleton. The detached particles fall together with the shot pellets and are physically separated by sieving through the grid holes. The shot pellets are then circulated back to the shot peening machine by a conveying device for continuous operation. This method avoids the problems of high energy consumption, skeleton damage, or product contamination in traditional methods, and achieves efficient, low-loss, and high-purity resource recovery. At the same time, it supports automated continuous operation, which significantly improves the feasibility of industrial application. Attached Figure Description

[0007] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of the present invention and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0008] Figure 1 This is a schematic diagram of an overall device for stripping and recovering plate-type catalyst active particles provided by the present invention; Figure 2 A schematic diagram of the catalyst metal skeleton in a stripping and recovery plate-type catalyst active particle device provided by the present invention; Figure 3 This is a schematic diagram of a catalyst clamping system in a stripping and recovery plate-type catalyst active particle device provided by the present invention; Figure 4 This is a side view of the catalyst clamping system in a stripping and recovery plate-type catalyst active particle device provided by the present invention; In the diagram: 1. Shot blasting pellets; 2. Shot blasting machine; 3. Shot blasting pellet conveying device; 4. Catalyst clamping system; 401. Workbench; 402. Plate catalyst sheet; 403. Quick-release clamp; 404. Support boss; 405. Movable meshing clamp; 5. Shot blasting pellet collection chamber; 6. Active particle collection chamber; 7. Detached active particles; 8. Catalyst metal skeleton; 9. Void; 10. Undetached active particles. Detailed Implementation

[0009] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, 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. The components of the embodiments of the present invention described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0010] Therefore, the following detailed description of the embodiments of the invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the invention without inventive effort are within the scope of protection of the invention.

[0011] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0012] To address the technical deficiencies mentioned in the background section, this embodiment provides a catalyst active particle stripping device and a plate-type catalyst.

[0013] The present invention will now be described in further detail with reference to the accompanying drawings: like Figures 1-4 As shown, a first aspect of the present invention provides a stripping and recovery device for plate-type catalyst active particles, comprising: a chamber having a catalyst clamping system 4, a shot collection chamber 5, and an active particle collection chamber 6 arranged from top to bottom therein; the catalyst clamping system 4 being used to clamp a catalyst metal skeleton 8; a shot peening machine 2 being disposed on opposite sides of the chamber, with its spraying end facing the catalyst metal skeleton 8; and a shot conveying device 3 having one end connected to the shot collection chamber 5 and the other end connected to the shot peening machine 2; wherein the shot peening machine 2 is used to spray shot 1 onto the catalyst metal skeleton 8 to strip the active particles from the metal skeleton.

[0014] In the above structure, the equipment is integrated into a closed chamber, which has the ability to circulate materials and the potential for automated operation. It is suitable for industrial-grade catalyst recovery scenarios. Its core lies in the difference in mechanical properties between the metal skeleton and the active particles. The former has good elastic recovery ability, while the latter is a brittle ceramic oxide material. When it is impacted by high-speed pellets, it will break or loosen and fall off, thereby achieving non-destructive separation.

[0015] The silo serves as the load-bearing and protective structure of the entire system. The internal space is arranged with a catalyst clamping system 4, a shot collection chamber 5, and an active particle collection chamber 6, forming a material flow path from top to bottom. The silo is made of metal and has sufficient structural strength to withstand the vibration and impact loads during the shot peening process. It also has good sealing performance to prevent dust from spilling out and ensure a safe working environment. An inspection port or observation window can be set on the top of the silo for easy maintenance and monitoring of the operating status.

[0016] The catalyst clamping system 4 is located in the upper part of the chamber and is mainly used to stabilize and fix the metal skeleton 8 of the catalyst to be treated, ensuring that it does not shift or deform beyond its elastic range during shot peening. The clamping system can be adapted and adjusted according to plate catalyst sheets 402 of different sizes and specifications, and supports single or multiple sheets to be installed in parallel to meet diverse processing needs.

[0017] The shot peening machine 2 is located on opposite sides of the chamber, with its spraying end facing the clamped catalyst metal skeleton 8. It can spray the catalyst surface in both directions or at multiple angles in the horizontal direction. The shot peening machine 2 includes a shot feeding system, an acceleration device (such as a centrifugal wheel or compressed air nozzle), and a directional nozzle assembly. It can control the initial velocity, spray density, and coverage of the shot 1. By adjusting the spraying parameters, the peeling efficiency of the active particles can be maximized without damaging the metal mesh structure.

[0018] The number and layout of shot peening machines 2 can be flexibly configured according to actual processing capacity requirements. For example, two or more sets can be set symmetrically, or auxiliary shot peening machines 2 can be added at the top or at an angle to improve coverage.

[0019] The shot conveying device 3 connects the shot collection chamber 5 and the shot peening machine 2 to form a closed loop. It is used to transport the shot 1 scattered in the shot collection chamber 5 back to the inlet of the shot peening machine 2 to realize continuous shot supply. During the conveying process, a screening device can be equipped to remove impurities, ensure the cleanliness and consistency of the returned shot 1, and extend the service life of the equipment.

[0020] The pellet collection chamber 5 is located below the catalyst clamping system 4 and is used to receive the mixture of pellets 1 that bounce off or fall from the catalyst surface and the detached active particles. The collection chamber has an inclined bottom or a funnel-shaped structure, which facilitates the material to slide and concentrate. The active particle collection chamber 6 is set below it. The two can be initially separated by a grid plate or other screening structure.

[0021] The active particle collection chamber 6 is located at the bottom layer and is used to collect the active particles 7 that have been separated and detached. It can be removed and emptied periodically, and works with the packaging system to complete the storage and transfer of the recycled products.

[0022] Through the above technical solution, this application achieves efficient and clean removal of active particles adhering to the surface of the catalyst metal skeleton 8 without damaging its integrity. Since the shot peening 1 mainly induces elastic vibration of the catalyst metal skeleton 8 rather than plastic deformation, structural damage is effectively avoided. At the same time, because the active particles themselves are brittle and easily break and detach under impact, the removal rate can reach more than 98%. Furthermore, the recycling of the shot 1 significantly reduces operating costs, and the entire process can be automated, making it suitable for large-scale continuous production. This fundamentally differs from traditional rolling, crushing, or stretching removal methods, providing an energy-saving, environmentally friendly, and high-value-added pretreatment method for catalyst regeneration.

[0023] In this scheme, the catalyst clamping system 4, the shot collection chamber 5, and the active particle collection chamber 6 are connected in sequence. The catalyst clamping system 4 includes symmetrically arranged support bosses 404; a worktable 401, detachably connected between the two support bosses 404; and a quick-release clamp 403 connected to the worktable 401, which is used to fix the plate catalyst sheet 402 to both sides of the worktable 401. The plate catalyst sheet 402 includes a catalyst metal skeleton 8 and active particles, with the active particles evenly distributed on the catalyst metal skeleton 8. When the shot peening machine 2 sprays shot 1 onto the catalyst metal skeleton 8, the active particles fall off the metal skeleton and into the active particle collection chamber 6.

[0024] In this embodiment, the catalyst clamping system 4 enables stable clamping and efficient loading and unloading of the plate catalyst sheet 402, while ensuring that the active particles fall smoothly to the designated collection area after being peeled off.

[0025] The catalyst clamping system 4, the pellet collection chamber 5, and the active particle collection chamber 6 are connected in sequence, forming a continuous material channel in the vertical direction. The detached active particles 7 can fall directly into the active particle collection chamber 6 under the action of gravity without the need for additional conveying devices, thus avoiding particle accumulation or blockage. This vertical through-type design not only simplifies the internal structure but also improves the separation efficiency and system reliability.

[0026] The catalyst clamping system 4 includes symmetrically arranged support bosses 404, which serve as the load-bearing foundation and are fixed to the inner wall of the chamber, possessing sufficient rigidity and impact resistance. The support bosses 404 are typically made of high-strength metal materials (such as Q345 steel or stainless steel), and can be rectangular blocks or trapezoidal platforms, symmetrically arranged on both sides of the worktable 401 in the horizontal direction to support and limit the worktable 401.

[0027] The workbench 401 is detachably connected between two support bosses 404. As the core platform for catalyst plate installation, it is a vertical or near-vertical flat plate structure, and the material can be wear-resistant and impact-resistant metal plate.

[0028] The quick-release clamp 403 is connected to the workbench 401 and is used to fix the plate catalyst sheet 402 to both sides of the workbench 401. The clamp is easy to operate and responds quickly, and can realize the quick clamping and release of the plate catalyst sheet 402.

[0029] The plate catalyst sheet 402 includes a catalyst metal skeleton 8 and active particles. The active particles are uniformly distributed on the catalyst metal skeleton 8. When the shot peening machine 2 sprays spherical shot 1 onto the catalyst metal skeleton 8, the active particles 7 fall off the catalyst metal skeleton 8 and fall into the active particle collection chamber 6.

[0030] Through the above technical solutions, this application achieves stable clamping and efficient loading and unloading of catalyst sheets, while constructing a complete material flow path from stripping to collection. Due to the combination structure of the detachable workbench 401 and quick-release clamp 403, the loading and unloading time is significantly shortened and the throughput per unit time is increased. The three-section sequentially connected design ensures the unobstructed fall of the detached active particles 7, reducing the risk of residue and cross-contamination. Especially when facing large-scale waste catalyst recycling tasks, this structure is easy to integrate into automated production lines, working with robotic arms to complete the picking and placing operations, greatly reducing labor costs and improving operational safety.

[0031] Based on the above embodiments, this embodiment further provides that the support boss 404 is provided with a movable engagement clamp 405, which clamps both ends of the plate catalyst sheet 402; and two sets of quick-release clamps 403 are provided, which are connected to the other two ends of the plate catalyst sheet 402.

[0032] By setting up the movable engagement clamp 405 and multiple sets of quick-release clamps 403 to work together, the plate catalyst sheet 402 is stably clamped in all directions. This can effectively resist the vibration and dynamic load caused by the continuous impact of the shot 1 during the shot peening process, and prevent the catalyst sheet from shifting, loosening or falling off, thereby ensuring the safety and consistency of the stripping operation.

[0033] Among them, the support boss 404 is a rigid protrusion structure set in the lower part of the worktable 401, which is usually made of metal material and is used to support and position the plate catalyst sheet 402; the movable meshing clamp 405 is set on the support boss 404, has active pressure capability, and can bite and press the upper and lower ends of the plate catalyst sheet 402 in the closed state to form a reliable axial limit.

[0034] The clamping surface of the movable engagement clamp 405 can be adapted to the edge shape of the plate catalyst sheet 402, for example, by using a flat, curved, or toothed contact surface, in order to improve clamping stability and reduce local stress concentration.

[0035] In one optional embodiment, the movable engagement clamp 405 is pneumatically driven, and the cylinder extension and retraction are controlled by a solenoid valve to achieve rapid opening and closing, with sensitive response and controllable clamping force, which is suitable for the clamping needs of catalyst sheets of different thicknesses.

[0036] The quick-release clamp 403 is provided in two sets, each set is connected to the other two ends of the plate catalyst sheet 402, that is, it applies a lateral clamping force to the plate catalyst sheet 402 in the left and right direction; the quick-release clamp 403 is installed on the side of the workbench 401 and aligned with the side edge of the plate catalyst sheet 402 to ensure that the clamping force is evenly distributed.

[0037] Two sets of quick-release clamps 403 act on the two sides of the plate catalyst sheet 402 respectively, and together with the upper and lower clamping forces formed by the movable meshing clamp 405, they form a four-way constraint system, which significantly improves the overall clamping stiffness.

[0038] In a variant embodiment, the quick-release clamp 403 can be replaced with a hydraulic clamp or a magnetic chuck, further improving automation while ensuring clamping performance. Furthermore, the clamping components of the quick-release clamp 403 can be covered with a wear-resistant non-metallic material (such as polyurethane or nylon) to prevent scratching the catalyst flake surface during clamping, which could affect subsequent recycling.

[0039] The movable engagement clamp 405 applies pre-tightening pressure to both ends of the plate catalyst sheet 402 from the vertical direction to prevent it from jumping up and down under impact; the two sets of quick-release clamps 403 restrict its lateral movement from the horizontal direction. The two work together to firmly fix the catalyst sheet on the worktable 401. This multi-point, multi-directional joint clamping method is particularly suitable for high-speed shot peening environment, and can effectively suppress resonance and loosening caused by periodic impact, ensuring the continuous and stable operation of the shot peening process.

[0040] Through the above technical solution, this application achieves highly reliable fixation of the plate catalyst sheet 402, ensuring that the plate catalyst sheet 402 remains in position even when impacted by shot spherical pellets 1 from multiple directions. This avoids problems such as uneven peeling, skeleton damage, or abnormal equipment shutdown caused by insecure clamping. Therefore, this structure effectively solves the technical problems of easy loosening and poor clamping stability of the plate catalyst sheet 402 during shot peening, improves the safety and repeatability of equipment operation, and provides the necessary prerequisite for efficient and complete recovery of active particles and metal skeleton.

[0041] In this scheme, each set of quick-release clamps 403 contains two quick-release clamps 403, which achieves more uniform and reliable clamping and fixing of the end of the plate catalyst sheet 402, effectively avoiding the phenomenon of local stress concentration caused by single-point or single clamping, thereby reducing the risk of plastic deformation or damage to the catalyst metal skeleton 8 during the clamping process.

[0042] In this design, the worktable 401 and the support boss 404 are axially perpendicular.

[0043] In this scheme, the catalyst metal skeleton 8 is a mesh structure. The catalyst metal skeleton 8 adopts a mesh shape with regular or irregular distribution. The mesh structure is made of metal wire through weaving, stamping, welding or three-dimensional printing process to form a continuous and interconnected pore channel. The mesh structure can be designed as a single-layer planar mesh or a multi-layer superimposed three-dimensional mesh, which is suitable for plate catalyst sheets 402 with different thicknesses and loading densities.

[0044] like Figure 2 As shown, during shot peening, after the active particles detach, they leave cavities 9 on the catalyst metal skeleton 8, while the active particles 10 that do not detach will block the pores of the catalyst metal skeleton 8. By utilizing the network structure of the catalyst metal skeleton 8, its elastic response under dynamic impact is fully utilized, and combined with the inherent brittle properties of the active particles, an effective mechanical mismatch mechanism is formed, which solves the problem of easy breakage of the metal skeleton 8 and the decline in recycling value in traditional methods. At the same time, the natural desorption path provided by the grid boundary improves the stripping efficiency of the active particles, which helps to achieve the goal of high-purity and high-recovery-rate resource reuse.

[0045] Furthermore, a grid opening is provided between the pellet collection chamber 5 and the active particle collection chamber 6. The diameter of the grid opening is smaller than the diameter of the pellet 1. This grid opening acts as a physical sieving structure to separate the active particles 7 that detach from the catalyst metal skeleton 8 from the pellets 1 that rebound or fall after shot peening. The grid opening is designed to be smaller than the diameter of the pellet 1, ensuring that the pellet 1 cannot fall through the opening and is effectively intercepted and retained in the pellet collection chamber 5. At the same time, since the overall particle size of the active particles is much smaller than that of the pellet 1, they can pass smoothly through the grid opening and fall into the active particle collection chamber 6 below, thereby achieving automatic separation of the two.

[0046] The grid holes can be arranged in an array on the bottom plane of the pellet collection chamber 5, and their shape can be circular, square, rectangular strip, or other geometric shapes adapted to production needs.

[0047] In this scheme, two sets of shot peening machines 2 are set up, with the two sets of shot peening machines 2 located at one end and the other end of the chamber, forming a counter-jetting layout, thereby realizing the double-sided synchronous impact on the plate catalyst sheet 402 held in the catalyst holding system 4.

[0048] The shot peening machine 2, serving as the execution unit of the shot peening system, is used to spray the shot 1 onto the surface of the catalyst metal skeleton 8 at a certain initial velocity and angle. The kinetic energy of the shot 1 induces elastic vibration and local deformation of the metal mesh skeleton, causing the brittle active particles attached to it to break or loosen and detach. Two sets of shot peening machines 2 are installed at one end and the other end of the chamber, i.e., on opposite side walls, ensuring that the spraying directions correspond to each other and can cover both the front and back surfaces of the catalyst sheets.

[0049] Among them, the shot peening machine 2 refers to the device that can generate a high-speed jet and spray the shot 1 in a directional manner. Its working principle is to accelerate the shot 1 to a predetermined speed by mechanical or pneumatic means and then spray it out in a set direction to impact the target surface.

[0050] In this embodiment, the specific structure of the shot peening machine 2 can adopt the standard design in the prior art, such as a pneumatic shot peening machine 2 or a centrifugal shot peening machine 2, as long as it can meet the requirements of stable shot supply and controllable spray rate and direction.

[0051] There are two sets of shot peening machines 2, each set containing one or more shot peening machines 2, the specific number of which can be adjusted according to the processing efficiency requirements. For example, in some implementation scenarios, each set can be configured with multiple shot peening machines 2 to expand the blasting coverage area and increase the impact density per unit time.

[0052] Specifically, each group of shot peening machines 2 contains two shot peening machines 2; the two shot peening machines 2 in each group of shot peening machines 2 are arranged symmetrically or asymmetrically on one side or both ends of the chamber, and their spraying direction can be adjusted independently to form a stream of spherical shot 1 with different incident angles, thereby covering different areas of the catalyst metal skeleton 8, especially enhancing the impact strength on complex parts such as edges and pore transition areas.

[0053] A second aspect of this invention provides a method for shot peening and recovering active particles of a plate-type catalyst, the method being carried out as described above, including: The plate catalyst sheet 402 to be processed is fixed in the catalyst clamping system 4 inside the chamber. The plate catalyst sheet 402 includes a catalyst metal skeleton 8 and active particles attached thereto. Using shot peening machines 2 located on opposite sides of the chamber, spherical shot 1 is sprayed onto the surface of the catalyst metal skeleton 8 of the plate catalyst sheet 402, and the active particles are peeled off from the catalyst metal skeleton 8 by the impact of the kinetic energy of the shot 1. After being peeled off, the active particles 7 fall under the action of gravity, pass through the grid holes located at the bottom of the pellet collection chamber 5, and enter the active particle collection chamber 6 below to be collected. After impact, the ball 1 falls into the ball collection chamber 5 and is then recovered to the shot peening machine 2 via the ball conveying device 3, thus realizing the recycling of the ball 1.

[0054] The above are merely preferred embodiments of the present invention and are not intended to limit the present invention. Various modifications and variations can be made to the present invention by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A stripping and recovery device for plate-type catalyst active particles, characterized in that, include: The chamber contains, from top to bottom, a catalyst clamping system, a pellet collection chamber, and an active particle collection chamber. The catalyst clamping system is used to clamp the catalyst metal skeleton. A shot peening machine is located on both sides of the chamber, with its spraying end facing the catalyst metal skeleton; The shot conveying device is connected at one end to the shot collection chamber and at the other end to the shot peening machine; The shot peening machine is used to spray spherical pellets onto the catalyst metal skeleton to peel the active particles off the metal skeleton.

2. The stripping and recovery device for plate-type catalyst active particles according to claim 1, characterized in that, The catalyst clamping system, the pellet collection chamber, and the active particle collection chamber are connected in sequence. The catalyst clamping system includes: Symmetrically arranged support bosses; The worktable is detachably connected between the two supporting bosses; A quick-release clamp is attached to the workbench and is used to fix the plate catalyst sheet to both sides of the workbench. The plate-shaped catalyst sheet includes a catalyst metal framework and active particles, wherein the active particles are uniformly distributed on the catalyst metal framework. When the shot peening machine sprays spherical pellets onto the catalyst metal skeleton, the active particles detach from the metal skeleton and fall into the active particle collection chamber.

3. The stripping and recovery device for plate-type catalyst active particles according to claim 2, characterized in that, The support boss is provided with a movable engagement clamp, which clamps both ends of the plate catalyst sheet; The quick-release clamps are provided in two sets, and the two sets of quick-release clamps are connected to the other two ends of the plate catalyst sheet.

4. The stripping and recovery device for plate-type catalyst active particles according to claim 3, characterized in that, Each quick-release clamp set contains two quick-release clamps.

5. The stripping and recovery device for plate-type catalyst active particles according to claim 2, characterized in that, The worktable and the support boss are axially perpendicular.

6. The stripping and recovery device for plate-type catalyst active particles according to claim 2, characterized in that, The catalyst has a metal framework with a network structure.

7. The stripping and recovery device for plate-type catalyst active particles according to claim 1, characterized in that, A grid hole is provided between the pellet collection chamber and the active particle collection chamber, and the diameter of the grid hole is smaller than the diameter of the pellet.

8. The stripping and recovery device for plate-type catalyst active particles according to claim 1, characterized in that, The shot peening machine is provided in two sets, which are located at one end and the other end of the chamber.

9. A stripping and recovery device for plate-type catalyst active particles according to claim 8, characterized in that, Each group of shot peening machines consists of two shot peening machines.

10. A method for shot peening and recovering active particles of a plate-type catalyst, characterized in that, The method employs a stripping and recovery device for plate-type catalyst active particles as described in any one of claims 1-9 for stripping, comprising: The plate catalyst sheet to be processed is fixed in the catalyst clamping system inside the chamber. The plate catalyst sheet includes a catalyst metal skeleton and active particles attached thereto. Using shot peening machines located on opposite sides of the chamber, spherical shot is sprayed onto the surface of the catalyst metal skeleton of the plate catalyst sheet, and the active particles are peeled off from the catalyst metal skeleton by the impact of the kinetic energy of the shot. After being peeled off, the active particles fall under the influence of gravity, pass through the grid holes located at the bottom of the pellet collection chamber, and enter the active particle collection chamber below to be collected. After impact, the shot falls into the shot collection chamber and is then recovered to the shot peening machine via a shot conveying device, thus realizing the recycling of the shot.

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