A recovery extractor of a rhenium-containing catalyst and an extraction method thereof

Abstract

This invention discloses a rhenium-containing catalyst recovery extractor and extraction method. The invention relates to the field of catalyst recovery technology and includes a base plate with casters fixed to the corners of its lower surface. A support frame is fixed to the upper surface of the base plate, and a dissolution tank is fixed to the upper surface of the support frame. A crushing box is movably connected to the top opening of the dissolution tank. A crushing mechanism is used to crush the recovered rhenium-containing catalyst and is located inside the crushing box. A feeding mechanism is used to guide the rhenium-containing catalyst and is movably connected to the opening of the crushing box. A funnel is movably connected to the inner wall of the dissolution tank, and a screen is fixed to the inner wall of the funnel. A discharge pipe is fixed to the bottom surface of the dissolution tank, and the end of the discharge pipe penetrates the dissolution tank and extends to its outer surface, thereby improving the leaching efficiency of the rhenium-containing catalyst.

Description

Technical Field

[0001] This invention relates to the field of catalyst recovery technology, specifically to a rhenium-containing catalyst recovery extractor and its extraction method. Background Technology

[0002] Rhenium-containing catalysts refer to a class of catalytic materials in which metallic rhenium is the main active component or an important additive. Rhenium possesses a high melting point, good mechanical stability, and a unique electronic structure, giving it excellent performance in the catalytic field, particularly in high-temperature resistance, resistance to carbon buildup, and hydrodeoxygenation. Industrially, the most typical application is the platinum-rhenium (Pt-Re) bimetallic reforming catalyst. In petroleum refining processes, this catalyst is widely used in catalytic reforming processes, efficiently promoting the cyclization, isomerization, and dehydrogenation of alkanes, thereby increasing the octane number of gasoline and the yield of aromatics. The addition of rhenium significantly enhances the stability and selectivity of the catalyst, enabling it to operate for extended periods under more demanding conditions.

[0003] In the recovery and extraction process of rhenium-containing catalysts, pulverization is a crucial pretreatment step, and its adequacy directly affects the efficiency of subsequent metallurgical extraction. Insufficient pulverization will reduce leaching efficiency. Insufficient pulverization results in excessively large material particles, significantly reducing the specific surface area and hindering sufficient contact between the leaching agent and the rhenium-containing components. During pressurized alkaline or acid leaching, the active components inside the large particles are difficult to dissolve effectively, leading to a significant decrease in the rhenium leaching rate and a waste of precious metal resources. Summary of the Invention

[0004] To achieve the above objectives, the present invention is implemented through the following technical solution: a rhenium-containing catalyst recovery and extraction device, comprising a base plate, universal wheels fixedly provided at the corners of the lower surface of the base plate, a support frame fixedly provided on the upper surface of the base plate, a dissolving box fixedly provided on the upper surface of the support frame, and a crushing box movably connected to the top opening of the dissolving box; A pulverizing mechanism for pulverizing the recovered rhenium-containing catalyst, the pulverizing mechanism being disposed in the inner cavity of the pulverizing chamber; A feeding mechanism for guiding the flow of rhenium-containing catalyst is movably connected to the opening of the crushing chamber; A funnel is movably connected to the inner wall of the dissolving tank, and a sieve screen is fixed to the inner wall of the funnel. A discharge pipe is fixed to the bottom surface of the inner cavity of the dissolving tank, and the end of the discharge pipe passes through the dissolving tank and extends to the outer surface of the dissolving tank. The upper surface of the dissolving tank is perforated by an inlet valve, and the lower surface of the dissolving tank is perforated by a drain valve.

[0005] Preferably, the crushing mechanism includes a connecting frame and a rotating cylinder. The connecting frame is fixed on the outer surface of the crushing box, and a stepper motor is fixed on the inner wall of the connecting frame. The output end of the stepper motor is equipped with a drive wheel through a coupling. The rotating cylinder is rotatably connected to the inner cavity of the crushing box, and a driven wheel is fixed on the outer surface of the rotating cylinder. The driven wheel is connected to the drive wheel through a belt.

[0006] Preferably, rolling bearings are fixed on the outer surfaces of both ends of the rotating cylinder, and a wrapping ring is fixed on the outer ring of the rolling bearing. The wrapping ring is fixed on the outer surface of the crushing box and is used to prevent the material inside the crushing box from leaking out.

[0007] Preferably, grinding blocks are symmetrically fixed to the inner wall of the crushing box. The grinding blocks are frictionally adapted to the outer surface of the rotating cylinder. The side of the grinding block that contacts the rotating cylinder is made of frosted material. The outer surface of the rotating cylinder has several evenly distributed strip-shaped slots. An arc-shaped grinding strip is fixed to each of the evenly distributed strip-shaped slots on the outer surface of the rotating cylinder. The arc-shaped grinding strip is frictionally adapted to the frosted material side of the grinding block. The outer surface of the arc-shaped grinding strip has several evenly distributed drainage holes.

[0008] Preferably, the crushing mechanism further includes a support frame, which is fixed to the outer surface of the crushing box. A straight pipe is fixed to the inner wall of the support frame. A water pump is fixed to the end of the straight pipe away from the crushing box. A support rod is fixed to the lower surface of the water pump. The end of the support rod is fixed to the outer surface of the crushing box. A flexible hose is fixed to the water inlet end of the water pump. The end of the flexible hose away from the water pump is sealed and connected to the inner wall of the discharge pipe.

[0009] Preferably, a transfer box is fixedly installed at the end of the straight pipe away from the water pump. The transfer box is rotatably connected to the inner cavity of the rotating cylinder. A discharge box is passed through the lower surface of the transfer box. A drainage groove is opened on the lower surface of the discharge box. A sealing strip is fixedly installed at the drainage groove on the lower surface of the discharge box. The sealing strip is frictionally adapted to the inner wall of the rotating cylinder.

[0010] Preferably, a fixing ring is fixed on the outer surface of the crushing box, a positioning ring is uniformly fixed on the upper surface of the fixing ring, the feeding mechanism includes a cover plate, a positioning post is uniformly fixed on the lower surface of the cover plate, the positioning post is frictionally adapted to the inner wall of the fixing ring, and a handle is fixed on the side of the upper surface of the cover plate.

[0011] Preferably, a feed pipe passes through the center of the upper surface of the cover plate, a three-way pipe is fixed at the bottom opening of the feed pipe, a connecting pipe is fixed at the end of the three-way pipe, and an arc-shaped discharge hood is fixed at the end of the connecting pipe. A diversion strip is provided on the inner wall of the arc-shaped discharge hood.

[0012] A method for recovering and extracting rhenium-containing catalysts includes the following steps: Step 1: Start the crushing mechanism, then put the rhenium-containing catalyst into the inner cavity of the feeding mechanism. The rhenium-containing catalyst entering the inner cavity of the crushing mechanism is subjected to strong compression and grinding action and is crushed into fine particles. The crushed catalyst particles complete the initial crushing and screening through the internal structure of the crushing mechanism. Step 2: The pulverized catalyst particles accumulate at the bottom of the inner cavity of the rotating part of the pulverizing mechanism. An appropriate amount of rhenium-containing catalyst-specific dissolving solution is injected into the dissolving tank through the liquid inlet valve. The liquid guiding mechanism inside the pulverizing mechanism is activated, and the dissolving liquid in the dissolving tank is pumped into the inner cavity of the pulverizing mechanism. The dissolving liquid is sprayed onto the catalyst powder at the bottom of the inner cavity of the pulverizing mechanism, and the leaching reaction begins. Step 3: Under gravity, the solution containing dissolved rhenium drips into the funnel below. The screen on the inner wall of the funnel performs secondary filtration on the seeping solution, intercepting any small solid particles that may flow out with the solution. The filtered, clear leachate collects at the bottom of the dissolving tank. Undissolved solid residue is retained by the screen. Simultaneously, the liquid guiding mechanism inside the crushing mechanism continues to operate, pumping the leachate from the bottom back into the crushing mechanism, forming a circulating leachate until the soluble rhenium component in the catalyst powder is fully dissolved. Step 4: After the cyclic leaching is completed, open the drain valve to drain and collect all the leachate rich in rhenium ions from the bottom of the dissolution tank, and send it to subsequent processes such as ion exchange, extraction or precipitation for rhenium enrichment and purification.

[0013] This invention provides a rhenium-containing catalyst recovery extractor and extraction method. It has the following beneficial effects: I. The rhenium-containing catalyst recovery extractor and its extraction method, by setting up a crushing mechanism, is the "crushing core" of the device, responsible for mechanically crushing the blocky or granular waste catalyst, increasing its specific surface area, creating conditions for subsequent chemical leaching, and improving the leaching efficiency of rhenium.

[0014] II. The rhenium-containing catalyst recovery extractor and its extraction method, by setting up a feeding mechanism, is the "feeding guide unit" of the device, which is used to guide the catalyst smoothly into the crushing box, and at the same time can seal the crushing chamber during operation to prevent dust leakage.

[0015] III. The recovery extractor and extraction method for the rhenium-containing catalyst constitute a solid-liquid separation system by using a funnel and a sieve. The funnel collects the leachate dripping from the crushing chamber; the sieve performs secondary filtration on the leachate, intercepting fine solid particles that may flow out with the liquid, ensuring that the liquid entering the bottom of the dissolution tank is relatively clear. A discharge pipe is provided to remove undissolved solid residue and circulating liquid from the dissolution tank.

[0016] IV. The rhenium-containing catalyst recovery and extraction device and its extraction method utilize grinding blocks fixed to the inner wall of the grinding chamber. The surface of these grinding blocks, opposite the rotating cylinder, is made of abrasive material, forming a fixed grinding surface. Dynamic grinding elements are constructed by using strip-shaped grooves and arc-shaped grinding strips on the outer surface of the rotating cylinder. The arc-shaped grinding strips protrude from the surface of the rotating cylinder and, as the cylinder rotates, form a shearing and compression zone with the fixed grinding blocks. When catalyst particles enter between these zones, they are subjected to intense grinding and compression and are thus pulverized. Drainage holes on the arc-shaped grinding strips allow liquids and fine particles to pass through, entering the rotating cylinder or falling, serving a sieving and guiding function. This design achieves continuous and efficient pulverization of the catalyst.

[0017] V. The rhenium-containing catalyst recovery extractor and its extraction method utilize a transfer box installed within the rotating cylinder's inner cavity, which can rotate relative to the rotating cylinder, serving as a distribution chamber for the circulating liquid. A discharge box is connected below the transfer box, with drainage channels on its lower surface used to evenly spray the circulating liquid onto the bottom of the rotating cylinder's inner cavity. A sealing strip, installed at the drainage channel of the discharge box, forms a friction seal with the inner wall of the rotating cylinder, ensuring that the liquid can only flow out through the drainage channel and will not leak from gaps, while allowing the rotating cylinder to rotate relative to the discharge box. This design achieves static liquid supply on the rotating component, evenly distributing the circulating liquid to the bottom of the pulverizing chamber, ensuring full contact with the catalyst powder for leaching. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the external structure of a rhenium-containing catalyst recovery and extraction device according to the present invention; Figure 2 This is a side view of the structure of a rhenium-containing catalyst recovery extractor according to the present invention; Figure 3 This is a partial structural schematic diagram of a rhenium-containing catalyst recovery and extraction device according to the present invention; Figure 4 This is a schematic diagram of the crushing mechanism of the present invention; Figure 5 This is a schematic cross-sectional view of the crushing mechanism of the present invention; Figure 6 This is a schematic diagram of the cross-sectional structure of the grinding block of the present invention; Figure 7 This is a partial cross-sectional structural diagram of the crushing mechanism of the present invention; Figure 8 This is a schematic diagram of the material discharge box structure of the present invention; Figure 9 This is a schematic diagram of the feeding mechanism of the present invention; Figure 10 This is a schematic cross-sectional view of the feeding mechanism of the present invention.

[0019] In the diagram: 1. Base plate; 2. Casters; 3. Elevating frame; 4. Dissolving tank; 5. Grinding tank; 6. Crushing mechanism; 61. Connecting frame; 62. Stepper motor; 63. Drive wheel; 64. Belt; 65. Driven wheel; 66. Rotating drum; 67. Rolling bearing; 68. Enclosing ring; 69. Arc-shaped grinding strip; 610. Support frame; 611. Straight pipe; 612. Support rod; 613. Water pump; 614. Hose; 615. Transfer box; 616. Discharge box; 617. Sealing strip; 618. Grinding block; 7. Feeding mechanism; 71. Cover plate; 72. Handle; 73. Positioning post; 74. Feeding pipe; 75. T-pipe; 76. Connecting pipe; 77. Arc-shaped discharge hood; 8. Discharge pipe; 9. Funnel; 10. Screen; 11. Fixing ring; 12. Positioning ring; 13. Liquid inlet valve; 14. Liquid outlet valve. Detailed Implementation

[0020] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments. The embodiments of the present invention are given for illustrative and descriptive purposes only, and are not intended to be exhaustive or to limit the invention to the forms disclosed. Many modifications and variations will be apparent to those skilled in the art. The embodiments were chosen and described to better illustrate the principles and practical application of the invention, and to enable those skilled in the art to understand the invention and design various embodiments with various modifications suitable for a particular purpose.

[0021] like Figures 1-10 As shown, the present invention provides a technical solution: a rhenium-containing catalyst recovery and extraction device, including a base plate 1, universal wheels 2 fixedly installed at the corners of the lower surface of the base plate 1, a support frame 3 fixedly installed on the upper surface of the base plate 1, a dissolution tank 4 fixedly installed on the upper surface of the support frame 3, and a crushing box 5 movably connected to the top opening of the dissolution tank 4. By setting the base plate 1 and universal wheels 2, a convenient and mobile support platform is provided for the entire recovery and extraction device, facilitating flexible transfer and positioning of the equipment within the workshop. By setting the support frame 3, the dissolution tank 4 is raised to a suitable height, leaving operating space for the lower drain valve 14 and pipeline connections. By setting the dissolution tank 4, it serves as the main container for the leaching reaction, used to hold the dissolving liquid and receive the catalyst powder falling from the crushing box 5 for the rhenium dissolution and leaching reaction. By setting the crushing box 5, installed at the top opening of the dissolution tank 4, it serves as the outer shell of the crushing mechanism 6, and simultaneously forms a communication channel between the crushing chamber and the lower dissolution chamber. The crushing mechanism 6 is used to crush the recovered rhenium-containing catalyst. The crushing mechanism 6 is located inside the crushing chamber 5. By setting up the crushing mechanism 6, it is the "crushing core" of the device, responsible for mechanically crushing the blocky or granular waste catalyst, increasing its specific surface area, creating conditions for subsequent chemical leaching, and improving the leaching efficiency of rhenium. The feeding mechanism 7 is used to guide the flow of rhenium-containing catalyst and is movably connected to the opening of the crushing chamber 5. The feeding mechanism 7 acts as a "feeding guide unit" of the device, guiding the catalyst smoothly into the crushing chamber 5, and simultaneously sealing the crushing chamber during operation to prevent dust leakage. A funnel 9 is movably connected to the inner wall of the dissolving tank 4. A sieve 10 is fixed to the inner wall of the funnel 9. A discharge pipe 8 is fixed to the bottom surface of the inner cavity of the dissolving tank 4, with its end penetrating the dissolving tank 4 and extending to its outer surface. The funnel 9 and sieve 10 constitute a solid-liquid separation system. The funnel 9 collects the leachate dripping from the crushing tank 5; the sieve 10 performs secondary filtration on the leachate, intercepting fine solid particles that may flow out with the liquid, ensuring that the liquid entering the bottom of the dissolving tank 4 is relatively clear. The discharge pipe 8 is used to remove undissolved solid residue and circulating liquid from the dissolving tank 4. An inlet valve 13 penetrates the upper surface of the dissolving tank 4, and a drain valve 14 penetrates the lower surface of the dissolving tank 4. The inlet valve 13 and the drain valve 14 are used to inject fresh dissolving solution into the dissolving tank 4 and to discharge and collect rhenium-rich leachate, respectively.

[0022] The crushing mechanism 6 includes a connecting frame 61 and a rotating cylinder 66. The connecting frame 61 is fixed to the outer surface of the crushing chamber 5, and a stepper motor 62 is fixed to the inner wall of the connecting frame 61. The output end of the stepper motor 62 is connected to a drive wheel 63 via a coupling. The rotating cylinder 66 is rotatably connected to the inner cavity of the crushing chamber 5, and a driven wheel 65 is fixed to the outer surface of the rotating cylinder 66. The driven wheel 65 is connected to the drive wheel 63 via a belt 64. By setting up the connecting frame 61, a stable mounting platform is provided for the stepper motor 62, allowing it to be fixed to the outside of the crushing chamber 5. By setting up the stepper motor 62 as the power source of the crushing mechanism 6, its speed is controllable and its torque is stable, which can adapt to the crushing requirements of catalysts with different hardness. By setting up the drive wheel 63, belt 64, and driven wheel 65, a flexible transmission system is formed. The belt 64 transmission has the functions of buffering, vibration reduction, and overload protection, which can smoothly transmit the power of the stepper motor 62 to the rotating cylinder 66, while allowing the motor to be installed off-axis from the rotating cylinder 66, optimizing the spatial layout. The rotating cylinder 66 is the core rotating component of the crushing mechanism 6. It rotates inside the crushing box 5 and works with the fixed component to squeeze and grind the catalyst.

[0023] Rolling bearings 67 are fixed to the outer surfaces of both ends of the rotating cylinder 66. An enclosure ring 68 is fixed to the outer ring of each rolling bearing 67, and the enclosure ring 68 is fixed to the outer surface of the crushing chamber 5. This enclosure ring 68 is used to prevent material leakage from inside the crushing chamber 5. By setting the rolling bearings 67, high-precision, low-friction rotational support is provided to both ends of the rotating cylinder 66, ensuring smooth rotation and a long service life. The enclosure ring 68, installed on the outer surface of the crushing chamber 5 and surrounding the rolling bearings 67, serves a dual purpose: firstly, it fixes the outer ring of the rolling bearings 67; secondly, it acts as a sealing element, preventing dust and liquid from leaking from the shaft inside the crushing chamber 5, thus ensuring a clean working environment.

[0024] Grinding blocks 618 are symmetrically fixed to the inner wall of the grinding chamber 5. The grinding blocks 618 are frictionally fitted to the outer surface of the rotating cylinder 66. The side of the grinding block 618 in contact with the rotating cylinder 66 is made of a frosted material. The outer surface of the rotating cylinder 66 has several evenly distributed strip-shaped grooves. An arc-shaped grinding strip 69 is fixed to each of these evenly distributed grooves. The arc-shaped grinding strip 69 is frictionally fitted to the frosted side of the grinding block 618. The outer surface of the arc-shaped grinding strip 69 has several evenly distributed drainage holes. By setting the grinding blocks 618 and fixing them to the inner wall of the grinding chamber 5, with their frosted surfaces facing the rotating cylinder 66, a fixed grinding surface is formed. The strip-shaped grooves and arc-shaped grinding strips 69 on the outer surface of the rotating cylinder 66 constitute a dynamic grinding element. The arc-shaped grinding strips 69 protrude from the surface of the rotating cylinder 66 and rotate with the rotating cylinder 66, forming a shearing and squeezing area with the fixed grinding blocks 618. When catalyst particles enter between the two, they are pulverized by intense grinding and compression. Drainage holes on the arc-shaped grinding strips 69 allow liquid and fine particles to pass through, entering the rotating drum 66 or falling, thus acting as a sieving and guiding mechanism. This design enables continuous and efficient pulverization of the catalyst.

[0025] The crushing mechanism 6 also includes a support frame 610, which is fixed to the outer surface of the crushing chamber 5. A straight pipe 611 is fixed to the inner wall of the support frame 610. A water pump 613 is fixed to the end of the straight pipe 611 away from the crushing chamber 5. A support rod 612 is fixed to the lower surface of the water pump 613. The end of the support rod 612 is fixed to the outer surface of the crushing chamber 5. A hose 614 is fixed to the water inlet end of the water pump 613. The end of the hose 614 away from the water pump 613 is sealed to the inner wall of the discharge pipe 8. By setting up the support frame 610 and the support rod 612, a stable mounting support is provided for the water pump 613 and the straight pipe 611, fixing them to the outside of the crushing chamber 5. The water pump 613 is the power source for the leaching solution circulation, drawing out the leaching solution from the bottom of the dissolving tank 4 and pumping it back into the crushing mechanism 6 to achieve circulating leaching. The straight pipe 611 connects the water outlet end of the water pump 613 to the liquid distribution components inside the crushing mechanism 6. By setting up a flexible hose 614 to connect the inlet end of the water pump 613 and the discharge pipe 8, its flexibility allows for a certain degree of displacement compensation during installation and vibration, ensuring a reliable sealed connection.

[0026] A transfer box 615 is fixedly installed at the end of the straight pipe 611 away from the water pump 613. The transfer box 615 is rotatably connected to the inner cavity of the rotating cylinder 66. A discharge box 616 penetrates the lower surface of the transfer box 615. A drainage groove is formed on the lower surface of the discharge box 616, and a sealing strip 617 is fixedly installed at the drainage groove on the lower surface of the discharge box 616. The sealing strip 617 is frictionally fitted with the inner wall of the rotating cylinder 66. By setting up the transfer box 615, which is installed in the inner cavity of the rotating cylinder 66 and can rotate relative to the rotating cylinder 66, it serves as a distribution cavity for circulating liquid. By setting up the discharge box 616, which is connected below the transfer box 615, the drainage groove on its lower surface is used to evenly spray the circulating liquid to the bottom of the inner cavity of the rotating cylinder 66. By installing a sealing strip 617 at the drain groove of the discharge box 616, a friction seal is formed with the inner wall of the rotating cylinder 66, ensuring that the liquid can only flow out through the drain groove and will not leak from the gaps, while allowing the rotating cylinder 66 to rotate relative to the discharge box 616. This design achieves static liquid supply on the rotating component, evenly distributing the circulating liquid to the bottom of the pulverizing chamber, and ensuring full contact with the catalyst powder for leaching.

[0027] A fixing ring 11 is fixed to the outer surface of the crushing chamber 5, and positioning rings 12 are uniformly fixed to the upper surface of the fixing ring 11. The feeding mechanism 7 includes a cover plate 71, and positioning posts 73 are uniformly fixed to the lower surface of the cover plate 71. The positioning posts 73 are frictionally fitted with the inner wall of the fixing ring 11, and a handle 72 is fixed to the side of the upper surface of the cover plate 71. By setting the fixing ring 11 and positioning rings 12, which are installed at the top opening of the crushing chamber 5, a reference for the installation and positioning of the cover plate 71 is provided. The cover plate 71 is the main body of the feeding mechanism 7 and is used to close the top opening of the crushing chamber 5. By setting the positioning posts 73, which cooperate with the inner wall of the fixing ring 11, the cover plate 71 can be quickly and accurately aligned and installed. By setting the handle 72, it is convenient for the operator to hold and move the cover plate 71 to realize the opening and closing operation.

[0028] A feed pipe 74 passes through the center of the upper surface of the cover plate 71. A three-way pipe 75 is fixed at the bottom opening of the feed pipe 74, and a connecting pipe 76 is fixed at the end of the three-way pipe 75. An arc-shaped discharge hood 77 is fixed at the end of the connecting pipe 76, and a flow divider is provided on the inner wall of the arc-shaped discharge hood 77. The feed pipe 74, which passes through the cover plate 71, serves as the feed inlet for the catalyst. The three-way pipe 75, the connecting pipe 76, and the arc-shaped discharge hood 77 constitute a feeding guide and dispersion device. The three-way pipe 75 divides the feed into two paths, the connecting pipe 76 guides the material, and the arc-shaped discharge hood 77 evenly guides the catalyst to the grinding area of ​​the crushing mechanism 6. The flow divider on the inner wall of the arc-shaped discharge hood 77 further disperses the material, preventing material from accumulating in a single location and ensuring uniform crushing.

[0029] A method for recovering and extracting rhenium-containing catalysts includes the following steps: Step 1: Start the crushing mechanism 6, and then put the rhenium-containing catalyst into the inner cavity of the feeding mechanism 7. The rhenium-containing catalyst entering the inner cavity of the crushing mechanism 6 is subjected to strong compression and grinding action and is crushed into fine particles. The crushed catalyst particles complete the initial crushing and screening through the internal structure of the crushing mechanism 6. Step 2: The pulverized catalyst particles accumulate at the bottom of the inner cavity of the rotating part of the pulverizing mechanism 6. An appropriate amount of rhenium-containing catalyst-specific dissolving solution is injected into the dissolving tank 4 through the liquid inlet valve 13. The liquid guiding mechanism inside the pulverizing mechanism 6 is activated, and the dissolving liquid in the dissolving tank 4 is pumped into the inner cavity of the pulverizing mechanism 6. The dissolving liquid is sprayed onto the catalyst powder at the bottom of the inner cavity of the pulverizing mechanism 6, and the leaching reaction begins. Step 3: The leachate containing dissolved rhenium drips into the funnel 9 below under gravity. The screen 10 on the inner wall of the funnel 9 performs secondary filtration on the seeping solution, intercepting any small solid particles that may flow out with the solution. The filtered, clarified leachate collects at the bottom of the dissolving tank 4. Undissolved solid residues are retained by the screen 10. At the same time, the liquid guiding mechanism inside the crushing mechanism 6 continues to work, pumping the leachate from the bottom back into the crushing mechanism 6, forming a circulating leachate until the soluble rhenium component in the catalyst powder is fully dissolved. Step 4: After the cyclic leaching is completed, open the drain valve 14 to drain and collect all the leachate rich in rhenium ions from the bottom of the dissolving tank 4, and send it to subsequent processes such as ion exchange, extraction or precipitation for the enrichment and purification of rhenium.

[0030] Working principle: The operator feeds the rhenium-containing waste catalyst to be recycled into the feed pipe 74. After being evenly dispersed through the three-way pipe 75, connecting pipe 76, and arc-shaped discharge hood 77, the material falls into the crushing mechanism 6 inside the crushing box 5. The stepper motor 62 is started, driving the rotating drum 66 to rotate through the drive wheel 63, belt 64, and driven wheel 65. The arc-shaped grinding strips 69 on the outer surface of the rotating drum 66 and the grinding blocks 618 fixed on the inner wall of the crushing box 5 form a relative motion, generating a strong squeezing and grinding effect on the catalyst particles falling between them, crushing them into fine particles. The crushed particles fall to the bottom of the inner cavity of the rotating drum 66 through the drainage holes on the arc-shaped grinding strips 69 and the strip-shaped grooves of the rotating drum 66, completing the solid phase pretreatment. A suitable amount of rhenium-containing catalyst-specific dissolving solution is injected into the dissolving tank 4 through the inlet valve 13. The water pump 613 is started, and the pump draws the dissolving solution from the discharge pipe 8 at the bottom of the dissolving tank 4 through the hose 614. After pressurization, the solution is sent through the straight pipe 611 into the transfer box 615 located inside the rotating cylinder 66. The dissolving solution enters the discharge box 616 from the transfer box 615 and, guided by the sealing strip 617, is evenly sprayed onto the catalyst powder at the bottom of the rotating cylinder 66 through the drainage groove on its lower surface, thus initiating the leaching reaction. The leachate containing dissolved rhenium drips from the bottom of the crushing tank 5 into the funnel 9 below under gravity. The screen 10 on the inner wall of the funnel 9 performs secondary filtration of the seeping solution, intercepting fine solid particles that may flow out with the solution. The filtered, clarified leachate collects at the bottom of the dissolving tank 4. Undissolved solid residue is retained by the screen 10, remaining in the funnel 9 or being cleaned periodically. Pump 613 operates continuously, pumping the leachate from the bottom of the dissolving tank 4 back into the pulverizing mechanism 6, forming a circulating leachate. Fresh or low-concentration leachate continuously contacts the catalyst powder, dissolving the rhenium component. This circulation method greatly improves the mass transfer rate, ensuring that the soluble rhenium component in the catalyst powder is fully dissolved until saturation or complete reaction is achieved. After the cyclic leaching is completed, open the drain valve 14 to drain all the rhenium-rich leachate from the bottom of the dissolving tank 4 and collect it in a dedicated container. The collected leachate is then sent to subsequent processes such as ion exchange, extraction, or precipitation for rhenium enrichment and purification. The solid residue remaining in the crushing tank 5 can be cleaned periodically by disassembly and cleaning.

[0031] Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of them. All other embodiments obtained by those skilled in the art and related fields based on the embodiments of the present invention without inventive effort should fall within the scope of protection of the present invention. Structures, devices, and operating methods not specifically described and explained in the present invention, unless otherwise specified or limited, shall be implemented according to conventional means in the art.

Claims

1. A rhenium-containing catalyst recovery and extraction device, comprising a base plate (1), universal wheels (2) fixedly mounted at the corners of the lower surface of the base plate (1), a support frame (3) fixedly mounted on the upper surface of the base plate (1), a dissolving box (4) fixedly mounted on the upper surface of the support frame (3), and a crushing box (5) movably connected to the top opening of the dissolving box (4), characterized in that: A crushing mechanism (6) is used to crush the recovered rhenium-containing catalyst, and the crushing mechanism (6) is located in the inner cavity of the crushing box (5); Feeding mechanism (7), which is used to guide the rhenium-containing catalyst, is movably connected to the opening of the crushing box (5); A funnel (9) is movably connected to the inner wall of the dissolving tank (4), and a sieve screen (10) is fixedly provided on the inner wall of the funnel (9). A discharge pipe (8) is fixedly provided on the bottom surface of the inner cavity of the dissolving tank (4), and the end of the discharge pipe (8) penetrates the dissolving tank (4) and extends to the outer surface of the dissolving tank (4). The upper surface of the dissolving tank (4) is provided with an inlet valve (13), and the lower surface of the dissolving tank (4) is provided with a drain valve (14).

2. The rhenium-containing catalyst recovery and extraction device according to claim 1, characterized in that: The crushing mechanism (6) includes a connecting frame (61) and a rotating cylinder (66). The connecting frame (61) is fixed on the outer surface of the crushing box (5). A stepper motor (62) is fixed on the inner wall of the connecting frame (61). The output end of the stepper motor (62) is equipped with a drive wheel (63) through a coupling. The rotating cylinder (66) is rotatably connected to the inner cavity of the crushing box (5). A driven wheel (65) is fixed on the outer surface of the rotating cylinder (66). The driven wheel (65) is connected to the drive wheel (63) through a belt (64).

3. The rhenium-containing catalyst recovery and extraction device according to claim 2, characterized in that: Rolling bearings (67) are fixed on the outer surfaces of both ends of the rotating cylinder (66). A wrapping ring (68) is fixed on the outer ring of the rolling bearing (67). The wrapping ring (68) is fixed on the outer surface of the crushing box (5). The wrapping ring (68) is used to prevent the material inside the crushing box (5) from leaking out.

4. The rhenium-containing catalyst recovery and extraction device according to claim 2, characterized in that: Grinding blocks (618) are symmetrically fixed on the inner wall of the crushing box (5). The grinding blocks (618) are rubbed against the outer surface of the rotating cylinder (66). The side of the grinding block (618) that contacts the rotating cylinder (66) is made of frosted material. The outer surface of the rotating cylinder (66) is provided with several evenly distributed strip-shaped slots. Arc-shaped grinding strips (69) are fixed at the evenly distributed strip-shaped slots on the outer surface of the rotating cylinder (66). The arc-shaped grinding strips (69) are rubbed against the frosted side of the grinding block (618). The outer surface of the arc-shaped grinding strips (69) is provided with several evenly distributed drainage holes.

5. The rhenium-containing catalyst recovery and extraction device according to claim 4, characterized in that: The crushing mechanism (6) also includes a support frame (610), which is fixed on the outer surface of the crushing box (5). A straight pipe (611) is fixed on the inner wall of the support frame (610). A water pump (613) is fixed at one end of the straight pipe (611) away from the crushing box (5). A support rod (612) is fixed on the lower surface of the water pump (613). The end of the support rod (612) is fixed on the outer surface of the crushing box (5). A hose (614) is fixed at the water inlet end of the water pump (613). The end of the hose (614) away from the water pump (613) is sealed and connected to the inner wall of the discharge pipe (8).

6. The rhenium-containing catalyst recovery and extraction device according to claim 5, characterized in that: A transfer box (615) is fixedly installed at one end of the straight pipe (611) away from the water pump (613). The transfer box (615) is rotatably connected to the inner cavity of the rotating cylinder (66). A discharge box (616) runs through the lower surface of the transfer box (615). A drainage groove is provided on the lower surface of the discharge box (616). A sealing strip (617) is fixedly installed at the drainage groove on the lower surface of the discharge box (616). The sealing strip (617) is rubbed and adapted to the inner wall of the rotating cylinder (66).

7. The rhenium-containing catalyst recovery and extraction device according to claim 1, characterized in that: A fixing ring (11) is fixed on the outer surface of the crushing box (5). A positioning ring (12) is uniformly fixed on the upper surface of the fixing ring (11). The feeding mechanism (7) includes a cover plate (71). A positioning post (73) is uniformly fixed on the lower surface of the cover plate (71). The positioning post (73) is rubbed against the inner wall of the fixing ring (11). A handle (72) is fixed on the side of the upper surface of the cover plate (71).

8. The rhenium-containing catalyst recovery and extraction device according to claim 7, characterized in that: A feed pipe (74) is inserted through the center of the upper surface of the cover plate (71). A three-way pipe (75) is fixed at the bottom opening of the feed pipe (74). A connecting pipe (76) is fixed at the end of the three-way pipe (75). An arc-shaped discharge cover (77) is fixed at the end of the connecting pipe (76). A diversion strip is provided on the inner wall of the arc-shaped discharge cover (77).

9. A method for recovering and extracting rhenium-containing catalysts, characterized in that, The recovery extractor based on the rhenium-containing catalyst according to any one of claims 1 to 8 includes the following steps: Step 1: Start the crushing mechanism (6), and then put the rhenium-containing catalyst into the inner cavity of the feeding mechanism (7). The rhenium-containing catalyst in the inner cavity of the crushing mechanism (6) is subjected to strong compression and grinding action and is crushed into fine particles. The crushed catalyst particles are initially crushed and screened through the internal structure of the crushing mechanism (6). Step 2: The crushed catalyst particles accumulate at the bottom of the inner cavity of the rotating part of the crushing mechanism (6). An appropriate amount of rhenium-containing catalyst-specific dissolving liquid is injected into the dissolving tank (4) through the liquid inlet valve (13). The liquid guiding mechanism inside the crushing mechanism (6) is activated, and the dissolving liquid in the dissolving tank (4) is pumped into the inner cavity of the crushing mechanism (6). The dissolving liquid is sprayed onto the catalyst powder at the bottom of the inner cavity of the crushing mechanism (6), and the leaching reaction begins. Step 3: The solution containing dissolved rhenium (leaching solution) drips into the funnel (9) below under gravity. The screen (10) on the inner wall of the funnel (9) performs secondary filtration on the seeping solution, intercepting small solid particles that may flow out with the solution. The filtered clear leachate is collected at the bottom of the dissolving tank (4). Undissolved solid residues are retained by the screen (10). At the same time, the liquid guiding mechanism inside the crushing mechanism (6) continues to work, pumping the leachate at the bottom back into the crushing mechanism (6) to form a circulating leachate until the soluble rhenium component in the catalyst powder is fully dissolved. Step 4: After the cyclic leaching is completed, open the drain valve (14) to drain and collect all the leachate rich in rhenium ions from the bottom of the dissolving tank (4) and send it to subsequent processes such as ion exchange, extraction or precipitation for the enrichment and purification of rhenium.

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