Hydrogen fuel cell catalyst preparation equipment and method

Abstract

The invention discloses hydrogen fuel cell catalyst preparation equipment and a hydrogen fuel cell catalyst preparation method, and belongs to the field of cell catalyst preparation. The hydrogen fuel cell catalyst preparation equipment comprises a material mixing barrel and further comprises a driving motor, the driving motor is fixedly connected to the top of the material mixing barrel, the interior of the material mixing barrel is rotationally connected with a rotating shaft connected with the output end of the driving motor, and a stirring mechanism is arranged on the rotating shaft and used for conducting multi-directional impregnation on a carrier and a solution in the material mixing barrel; the return pipes symmetrically communicate with the outer wall of the mixing barrel, and a conveying mechanism is arranged between the return pipes and the bottom end of the rotating shaft and used for conveying a solution at the bottom of the mixing barrel into the return pipes; the dispersing mechanism is arranged on the inner wall of the mixing barrel and is communicated with the return pipe; the problems of non-uniform stirring, low preparation efficiency and poor preparation quality stability during preparation of the battery catalyst can be solved.

Description

Technical Field

[0001] This invention relates to the field of battery catalyst preparation technology, and in particular to an apparatus and method for preparing a hydrogen fuel cell catalyst. Background Technology

[0002] Hydrogen fuel cell catalysts are one of the core materials of the battery, and their performance directly affects the efficiency and lifespan of the battery. The main components include: raw material selection and pretreatment, catalyst precursor preparation, metal particle loading and reduction, and catalyst post-treatment. The preparation of hydrogen fuel cell catalysts requires strict management of the entire process from raw material selection and reaction parameter control to post-treatment in order to obtain catalysts with high activity and high stability.

[0003] The preparation methods mainly include: impregnation reduction method, colloidal method, electrochemical deposition method, atomic deposition method, alloying method, etc. Because the impregnation reduction method is simple and low in cost, it is very suitable for large-scale production. By impregnating the carrier in a metal salt solution and mixing it, and stirring it for a certain period of time, the metal ions are adsorbed on the surface of the carrier. Then, by adding a reducing agent, the metal ions are reduced to elemental particles and deposited on the carrier to form nanoparticles.

[0004] Currently, when battery catalysts are prepared by impregnation reduction, the support is usually in a suspended state in the solution. However, due to van der Waals forces, agglomeration often occurs, forming large particles that either float or settle. In addition, when metal ions are adsorbed on the support surface, if the stirring is insufficient, the metal ions can easily form a high-concentration adsorption layer in local areas. This leads to uneven nucleation density, poor dispersion, and few active sites during subsequent reduction of particles, which not only affects the preparation efficiency of the catalyst but also its quality. Summary of the Invention

[0005] The purpose of this invention is to solve the problems of uneven stirring, low preparation efficiency, and poor quality stability in the preparation of battery catalysts in the prior art, and to propose a hydrogen fuel cell catalyst preparation equipment and method.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: A hydrogen fuel cell catalyst preparation apparatus includes a mixing cylinder, and further includes: a drive motor fixedly connected to the top of the mixing cylinder, a rotating shaft rotatably connected inside the mixing cylinder and connected to the output end of the drive motor, wherein a stirring mechanism is provided on the rotating shaft for multi-directional impregnation of the carrier and solution inside the mixing cylinder; a reflux pipe symmetrically connected to the outer wall of the mixing cylinder, a conveying mechanism provided between the reflux pipe and the bottom end of the rotating shaft for conveying the solution at the bottom of the mixing cylinder to the reflux pipe; a dispersion mechanism disposed on the inner wall of the mixing cylinder, the dispersion mechanism being connected to the reflux pipe; a fixing ring fixedly connected to the lower part of the inner wall of the mixing cylinder, a flow guiding mechanism provided on the side of the fixing ring near the dispersion mechanism for guiding the solution near the inner wall of the mixing cylinder to the center; a fixing frame fixedly connected to the rotating shaft, an arc-shaped toothed plate fixedly connected on the side of the fixing frame near the flow guiding mechanism, and a connecting member provided between the fixing frame and the dispersion mechanism.

[0007] To facilitate mixing of the carrier in the solution, preferably, the stirring mechanism includes a mounting ring fixedly connected to a rotating shaft, with multiple sets of connecting shafts rotatably connected to the mounting ring, and a stirrer fixedly connected to the end of the connecting shaft away from the mounting ring. A direction-changing component is provided between the mounting ring and the connecting shaft to adjust the angle of the stirrer during rotation.

[0008] To further improve the uniformity of carrier and solution mixing, the reversing assembly includes an arc-shaped cavity within the mounting ring. A turntable is fixedly connected to one end of the connecting shaft near the arc-shaped cavity. An arc-shaped drive plate, which is in contact with the turntable, is slidably connected inside the arc-shaped cavity. A sealing plate, which is in contact with the arc-shaped cavity, is fixedly connected to the arc-shaped drive plate. A second elastic sheet is fixedly connected between the side of the sealing plate away from the arc-shaped drive plate and the inner wall of the arc-shaped cavity. The turntable is located inside the arc-shaped cavity, and a meshing protrusion is provided between the turntable and the arc-shaped drive plate. When the arc-shaped drive plate rotates along the arc-shaped cavity, it drives the turntable to rotate.

[0009] To facilitate the crushing of settled agglomerates, the conveying mechanism further includes a horizontal shaft rotatably connected to the bottom of the mixing cylinder. A driven bevel gear is fixedly connected to the side of the horizontal shaft near the rotating shaft. A driving bevel gear that meshes with the driven bevel gear is fixedly connected to the horizontal shaft. The horizontal shaft and the axes of the two return pipes are on the same straight line, and the end of the horizontal shaft extends into the interior of the return pipe. A screw conveyor that fits against the inner wall of the return pipe is fixedly connected to the horizontal shaft.

[0010] To facilitate the breaking up of floating agglomerates, the dispersing mechanism further includes a connecting ring fixedly connected to the inner wall of the mixing cylinder. A rotating ring is rotatably connected to the side of the connecting ring away from the mixing cylinder, and a connecting pipe is connected to the side of the rotating ring away from the connecting ring. The return pipe is connected to the connecting ring, and multiple sets of through holes are opened at the bottom of the connecting pipe. The connector is connected to the rotating ring.

[0011] To further prevent excessively high local concentrations of metal ions, the flow guiding mechanism includes a rotating rod rotatably connected between the fixed ring and the connecting ring. A swing plate is fixedly connected to the rotating rod, and a drive gear is fixedly connected to the side of the rotating rod away from the swing plate. The drive gear meshes with an arc-shaped toothed plate, and a first elastic sheet is fixed between the swing plate and the inner wall of the mixing cylinder.

[0012] To facilitate adjustment of the stirrer angle, a compression rod is further included, which is fixedly connected to the inner wall of the mixing cylinder near the swing plate. The compression rod is connected to the arc-shaped cavity of the sealing plate near the second elastic plate via a slip ring and a pipe.

[0013] To facilitate the addition of solution, carrier, and reducing agent, preferably, a feed box is connected to the top of the mixing cylinder, and a discharge pipe is connected to the bottom of the mixing cylinder, which is used to add solution and carrier into the mixing cylinder and to discharge the carrier after adsorption.

[0014] To improve the breaking effect of agglomerates, preferably, an ultrasonic device is also included, which is fixedly connected to the outer wall of the mixing cylinder, and is used to break up the carrier agglomerates during the impregnation process.

[0015] A method for preparing a hydrogen fuel cell catalyst includes the following steps: Step 1: First, add the metal salt solution to the equipment, and then immerse the carrier in the metal salt solution so that the metal ions are adsorbed on the surface of the carrier. Step 2: Then, the carrier and the metal salt solution are mixed and stirred, and the stirring direction is automatically adjusted during the stirring process; Step 3: Simultaneously, the carrier agglomerates settled at the bottom are transported to the top and evenly dispersed onto the liquid surface, which can break up the carrier agglomerates floating on the liquid surface. Step 4: In addition, during the stirring process, the solution on the outside is guided inward to increase the dispersibility of the carrier in the metal salt solution. Step 5: Continue until metal ions are uniformly adsorbed on the carrier surface, forming nanoparticles.

[0016] Compared with the prior art, the present invention provides a hydrogen fuel cell catalyst preparation apparatus and method, which has the following beneficial effects: 1. This hydrogen fuel cell catalyst preparation equipment can stir the carrier and solution through a stirring mechanism, and transport the agglomerates settled at the bottom to the top of the liquid surface through a conveying mechanism to facilitate the breaking up of the agglomerates at the bottom. In addition, the conveyed mixed solution can be evenly dispersed on the liquid surface through a dispersing mechanism to accelerate the breaking up of the agglomerates floating on the liquid surface, thereby improving the stability of the carrier suspension and improving the preparation quality of the catalyst.

[0017] 2. This hydrogen fuel cell catalyst preparation equipment can drive the flow guiding mechanism to reciprocate along the inner wall of the mixing cylinder through the stirring mechanism, which avoids the local concentration of the mixed solution being too high under the action of centrifugal force, and at the same time avoids the uneven distribution of the carrier, and can also improve the preparation efficiency of the catalyst.

[0018] 3. This hydrogen fuel cell catalyst preparation equipment, through a flow guiding mechanism and a direction-changing component, allows the stirring angle of the stirrer to be adjusted intermittently during the stirring process, thereby improving the uniformity of the support in the solution and further enhancing the catalyst preparation efficiency.

[0019] The parts of this device not involved are the same as or can be implemented using existing technologies. This invention can overcome the problems of uneven stirring, low preparation efficiency, and poor quality stability during battery catalyst preparation. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the structure of a hydrogen fuel cell catalyst preparation device proposed in this invention; Figure 2 This is a schematic diagram of the internal structure of the mixing cylinder in a hydrogen fuel cell catalyst preparation device proposed in this invention; Figure 3 This is a schematic cross-sectional view of the mixing cylinder in a hydrogen fuel cell catalyst preparation device proposed in this invention. Figure 4 This is a partial structural diagram of a hydrogen fuel cell catalyst preparation device proposed in this invention. Figure 1 ; Figure 5 This is a partial structural diagram of a hydrogen fuel cell catalyst preparation device proposed in this invention. Figure 2 ; Figure 6 This is a top view schematic diagram of the flow guiding mechanism in a hydrogen fuel cell catalyst preparation device proposed in this invention; Figure 7 This is a schematic cross-sectional view of the mounting ring and connecting shaft in a hydrogen fuel cell catalyst preparation device proposed in this invention.

[0021] In the diagram: 1. Mixing cylinder; 2. Drive motor; 3. Feed box; 4. Ultrasonic equipment; 5. Rotating shaft; 6. Mounting ring; 61. Arc-shaped cavity; 62. Turntable; 63. Arc-shaped drive plate; 64. Sealing plate; 65. Second elastic plate; 7. Connecting shaft; 8. Agitator; 9. Drive bevel gear; 10. Horizontal shaft; 11. Driven bevel gear; 12. Screw conveyor; 13. Return pipe; 14. Connecting ring; 15. Rotating ring; 16. Connecting pipe; 17. Fixed ring; 18. Rotating rod; 19. Drive gear; 20. Swing plate; 21. First elastic plate; 22. Compression rod; 23. Fixing frame; 24. Arc-shaped toothed plate; 25. Connecting piece; 26. Discharge pipe. Detailed Implementation

[0022] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0023] In the description of this invention, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0024] Example 1: Reference Figures 1-7A hydrogen fuel cell catalyst preparation apparatus includes a mixing cylinder 1, and further includes: a drive motor 2, fixedly connected to the top of the mixing cylinder 1; a rotating shaft 5 rotatably connected inside the mixing cylinder 1 and connected to the output end of the drive motor 2; wherein a stirring mechanism is provided on the rotating shaft 5 for multi-directional impregnation of the carrier and solution inside the mixing cylinder 1; a return pipe 13, symmetrically connected to the outer wall of the mixing cylinder 1; a conveying mechanism provided between the return pipe 13 and the bottom end of the rotating shaft 5 for conveying the solution at the bottom of the mixing cylinder 1 to the return pipe 13; a dispersion mechanism, disposed on the inner wall of the mixing cylinder 1 and connected to the return pipe 13; and a fixing ring 17, fixedly connected to the lower part of the inner wall of the mixing cylinder 1, near... A flow guiding mechanism is provided on one side of the dispersion mechanism to guide the solution near the inner wall of the mixing cylinder 1 to the center; a fixed frame 23 is fixedly connected to the rotating shaft 5, and an arc-shaped toothed plate 24 is fixedly connected to the side of the fixed frame 23 near the flow guiding mechanism. A connecting piece 25 is provided between the fixed frame 23 and the dispersion mechanism. It also includes a feed box 3 connected to the top of the mixing cylinder 1, and a discharge pipe 26 connected to the bottom of the mixing cylinder 1, which are used to add solution and carrier into the mixing cylinder 1 and to discharge the carrier after adsorption. It also includes an ultrasonic device 4 fixedly connected to the outer wall of the mixing cylinder 1, which is used to break up the carrier agglomerates during the impregnation process. The ultrasonic device 4 is a conventional means in the prior art, so it will not be described in detail.

[0025] In this embodiment, when preparing the battery catalyst, a metal salt solution is first added to the inside of the mixing cylinder 1. Then, the drive motor 2 is started to drive the stirring mechanism to stir the solution. Subsequently, the carrier is added. During the addition process, the dispersion mechanism is in a rotating state, which can disperse the carrier and make it fall to various parts of the solution, so as to facilitate the stirring of the carrier and the solution. Further, during the stirring process, the rotating shaft 5 drives the conveying mechanism to transport the mixed solution at the bottom of the mixing cylinder 1 to the liquid surface through the return pipe 13. The dispersion mechanism evenly disperses the lower layer of solution to the surface of the upper layer of solution. Through the collision between the lower layer of solution and the upper layer of solution, the carrier that has agglomerated and floated or settled can be broken up. At the same time, the flow guiding mechanism is driven to rotate back and forth along the inner wall of the mixing cylinder 1, guiding the mixed solution at the inner wall of the mixing cylinder 1 to the center position, so as to avoid the local area of ​​excessively high concentration of metal ions, which is conducive to the adsorption of metal ions on the surface of the carrier. In addition, during the flow guiding process, the stirring direction of the stirring mechanism can be adjusted intermittently to make the carrier and solution mix more evenly, thereby improving the preparation efficiency and quality of the catalyst.

[0026] Reference Figures 3-4The stirring mechanism includes a mounting ring 6 fixedly connected to a rotating shaft 5. Multiple sets of connecting shafts 7 are rotatably connected to the mounting ring 6. A stirrer 8 is fixedly connected to the end of the connecting shaft 7 away from the mounting ring 6. A direction-changing component is provided between the mounting ring 6 and the connecting shaft 7 to adjust the angle of the stirrer 8 when it rotates.

[0027] In this embodiment, when the drive motor 2 rotates, it will drive the rotating shaft 5 and the mounting ring 6 to rotate, thereby driving the stirrer 8 to rotate and stir the mixed solution. It should be noted that the specific structure of the stirrer 8 can refer to the technical solutions in the prior art. Those skilled in the art will know that an axial flow stirring device is usually used.

[0028] Reference Figure 4 and Figure 7 The reversing assembly includes an arc-shaped cavity 61 formed within the mounting ring 6. A turntable 62 is fixedly connected to one end of the connecting shaft 7 near the arc-shaped cavity 61. An arc-shaped drive plate 63, which is in contact with the turntable 62, is slidably connected inside the arc-shaped cavity 61. A sealing plate 64, which is in contact with the arc-shaped cavity 61, is fixedly connected to the arc-shaped drive plate 63. A second elastic sheet 65 is fixedly connected between the side of the sealing plate 64 away from the arc-shaped drive plate 63 and the inner wall of the arc-shaped cavity 61. The turntable 62 is located inside the arc-shaped cavity 61. A meshing protrusion is provided between the turntable 62 and the arc-shaped drive plate 63. When the arc-shaped drive plate 63 rotates along the arc-shaped cavity 61, it drives the turntable 62 to rotate.

[0029] In this embodiment, during the rotation of the rotating shaft 5, the stirrer 8 is driven to stir the solution. If hydraulic oil is supplied to the arc-shaped cavity 61, the arc-shaped drive plate 63 will move along the arc-shaped cavity 61 under the action of the sealing plate 64. The driving method of the arc-shaped drive plate 63 and the turntable 62 can refer to the driving method of the end face gear, thereby driving the turntable 62 and the connecting shaft 7 to rotate, thereby adjusting the angle of the stirrer 8 during rotation, thereby improving the uniformity of the solution stirring carrier and the solution.

[0030] Reference Figures 3-4 The conveying mechanism includes a horizontal shaft 10 rotatably connected to the bottom of the mixing cylinder 1. A driven bevel gear 11 is fixedly connected to the side of the horizontal shaft 10 near the rotating shaft 5. A drive bevel gear 9 that meshes with the driven bevel gear 11 is fixedly connected to the horizontal shaft 10. The axis of the horizontal shaft 10 and the two return pipes 13 are on the same straight line, and the end of the horizontal shaft 10 extends into the interior of the return pipe 13. A screw conveyor 12 that fits against the inner wall of the return pipe 13 is fixedly connected to the horizontal shaft 10.

[0031] In this embodiment, during the rotation of the rotating shaft 5, the driving bevel gear 9 will rotate, which in turn drives the horizontal shaft 10 to rotate through the driven bevel gear 11. This causes the screw conveyor 12 to rotate inside the return pipe 13, so that the solution at the bottom of the mixing cylinder 1 is transported to the top of the liquid surface through the return pipe 13. On the one hand, this can prevent agglomerates from settling at the bottom of the mixing cylinder 1. On the other hand, the height difference between the liquid surfaces can be used to break up the agglomerates, so as to facilitate the adsorption of metal ions on the carrier surface.

[0032] Reference Figure 2 , Figure 3 and Figure 5 The dispersing mechanism includes a connecting ring 14 fixedly connected to the inner wall of the mixing cylinder 1. A rotating ring 15 is rotatably connected to the side of the connecting ring 14 away from the mixing cylinder 1. A connecting pipe 16 is connected to the side of the rotating ring 15 away from the connecting ring 14. The return pipe 13 is connected to the connecting ring 14. Multiple sets of through holes are opened at the bottom of the connecting pipe 16. The connector 25 is connected to the rotating ring 15.

[0033] In this embodiment, during the rotation of the rotating shaft 5, the fixed frame 23 and the connecting piece 25 will drive the rotating ring 15 to rotate along the connecting ring 14, thereby driving the connecting pipe 16 to rotate above the liquid surface, so that the transported solution is evenly scattered above the liquid surface. Through the collision between the upper and lower layers of solution, the floating and settling agglomerates can be broken up, and the carrier can be more evenly distributed in the solution.

[0034] Reference Figure 2 , Figure 5 , Figure 6 and Figure 7 The flow guiding mechanism includes a rotating rod 18 rotatably connected between a fixed ring 17 and a connecting ring 14. A swing plate 20 is fixedly connected to the rotating rod 18. A drive gear 19 is fixedly connected to the side of the rotating rod 18 away from the swing plate 20. The drive gear 19 meshes with an arc-shaped toothed plate 24. A first elastic sheet 21 is fixed between the swing plate 20 and the inner wall of the mixing cylinder 1. The mechanism also includes a compression rod 22 fixedly connected to the inner wall of the mixing cylinder 1 near the swing plate 20. The compression rod 22 is connected to the arc-shaped cavity 61 of the sealing plate 64 near the second elastic sheet 65 through a slip ring and a pipe.

[0035] In this embodiment, during the rotation of the fixed frame 23, the arc-shaped toothed plate 24 is driven to rotate. When the arc-shaped toothed plate 24 meshes with the drive gear 19, it will drive the swing plate 20 to rotate. When the arc-shaped toothed plate 24 disengages from the drive gear 19, the swing plate 20 will rotate to the initial position under the action of the first elastic plate 21, thereby realizing the reciprocating rotation of the swing plate 20. This guides the solution on the inner wall of the mixing cylinder 1 to the center position, thereby avoiding the situation of excessively high local concentration of the solution. This is beneficial to the adsorption of metal ions on the surface of the carrier. In addition, during the rotation of the swing plate 20, it will intermittently squeeze the compression rod 22, thereby intermittently delivering the hydraulic oil in the compression rod 22 to the arc-shaped cavity 61, thereby intermittently adjusting the stirring angle of the stirrer 8, further improving the uniformity of solution stirring, and thus improving the preparation efficiency and quality of the catalyst.

[0036] Example 2: A method for preparing a hydrogen fuel cell catalyst includes the following steps: Step 1: First, add the metal salt solution to the equipment, and then immerse the carrier in the metal salt solution so that the metal ions are adsorbed on the surface of the carrier. Step 2: Then, the carrier and the metal salt solution are mixed and stirred, and the stirring direction is automatically adjusted during the stirring process; Step 3: Simultaneously, the carrier agglomerates settled at the bottom are transported to the top and evenly dispersed onto the liquid surface, which can break up the carrier agglomerates floating on the liquid surface. Step 4: In addition, during the stirring process, the solution on the outside is guided inward to increase the dispersibility of the carrier in the metal salt solution. Step 5: Continue until metal ions are uniformly adsorbed on the carrier surface, forming nanoparticles.

[0037] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A hydrogen fuel cell catalyst preparation apparatus, comprising a mixing cylinder (1), characterized in that, Also includes: The drive motor (2) is fixedly connected to the top of the mixing cylinder (1), and the mixing cylinder (1) is rotatably connected to the output end of the drive motor (2) via a rotating shaft (5). The rotating shaft (5) is equipped with a stirring mechanism for multi-directional impregnation of the carrier and solution in the mixing cylinder (1); A return pipe (13) is symmetrically connected to the outer wall of the mixing cylinder (1). A conveying mechanism is provided between the return pipe (13) and the bottom end of the rotating shaft (5) to convey the solution at the bottom of the mixing cylinder (1) into the return pipe (13). A dispersion mechanism is provided on the inner wall of the mixing cylinder (1), and the dispersion mechanism is connected to the return pipe (13); A fixed ring (17) is fixedly connected to the lower part of the inner wall of the mixing cylinder (1). The fixed ring (17) is provided with a flow guiding mechanism on the side near the dispersion mechanism to guide the solution near the inner wall of the mixing cylinder (1) to the center. A fixed frame (23) is fixedly connected to the rotating shaft (5). An arc-shaped toothed plate (24) is fixedly connected to the side of the fixed frame (23) near the flow guiding mechanism. A connecting piece (25) is provided between the fixed frame (23) and the dispersing mechanism.

2. The hydrogen fuel cell catalyst preparation equipment according to claim 1, characterized in that, The stirring mechanism includes a mounting ring (6) fixedly connected to a rotating shaft (5), and multiple sets of connecting shafts (7) are evenly rotatably connected to the mounting ring (6). A stirrer (8) is fixedly connected to one end of the connecting shaft (7) away from the mounting ring (6). A reversing component is provided between the mounting ring (6) and the connecting shaft (7) to adjust the angle of the stirrer (8) when it rotates.

3. The hydrogen fuel cell catalyst preparation equipment according to claim 2, characterized in that, The reversing assembly includes an arc-shaped cavity (61) formed within the mounting ring (6). A turntable (62) is fixedly connected to one end of the connecting shaft (7) near the arc-shaped cavity (61). An arc-shaped drive plate (63) that fits against the turntable (62) is slidably connected inside the arc-shaped cavity (61). A sealing plate (64) that fits against the arc-shaped cavity (61) is fixedly connected to the arc-shaped drive plate (63). A second elastic sheet (65) is fixedly connected between the side of the sealing plate (64) away from the arc-shaped drive plate (63) and the inner wall of the arc-shaped cavity (61). The turntable (62) is located inside the arc cavity (61), and there are meshing protrusions between the turntable (62) and the arc drive plate (63). When the arc drive plate (63) rotates along the arc cavity (61), it drives the turntable (62) to rotate.

4. The hydrogen fuel cell catalyst preparation equipment according to claim 1, characterized in that, The conveying mechanism includes a horizontal shaft (10) rotatably connected to the bottom of the mixing cylinder (1). A driven bevel gear (11) is fixedly connected to the side of the horizontal shaft (10) near the rotating shaft (5). A driving bevel gear (9) that meshes with the driven bevel gear (11) is fixedly connected to the horizontal shaft (10). The horizontal shaft (10) and the two return pipes (13) are on the same straight line, and the end of the horizontal shaft (10) extends into the interior of the return pipe (13). A screw conveyor (12) that fits against the inner wall of the return pipe (13) is fixedly connected to the horizontal shaft (10).

5. The hydrogen fuel cell catalyst preparation equipment according to claim 3, characterized in that, The dispersing mechanism includes a connecting ring (14) fixedly connected to the inner wall of the mixing cylinder (1), a rotating ring (15) rotatably connected to the side of the connecting ring (14) away from the mixing cylinder (1), and a connecting pipe (16) connected to the side of the rotating ring (15) away from the connecting ring (14). The return pipe (13) is connected to the connecting ring (14), the bottom of the connecting pipe (16) has multiple sets of through holes, and the connector (25) is connected to the rotating ring (15).

6. The hydrogen fuel cell catalyst preparation apparatus according to claim 5, characterized in that, The flow guiding mechanism includes a rotating rod (18) rotatably connected between a fixed ring (17) and a connecting ring (14). A swing plate (20) is fixedly connected to the rotating rod (18). A drive gear (19) is fixedly connected to the side of the rotating rod (18) away from the swing plate (20). The drive gear (19) meshes with an arc-shaped toothed plate (24). A first elastic sheet (21) is fixed between the swing plate (20) and the inner wall of the mixing cylinder (1).

7. The hydrogen fuel cell catalyst preparation apparatus according to claim 6, characterized in that, It also includes a compression rod (22) fixedly connected to the inner wall of the mixing cylinder (1) near the swing plate (20), and the compression rod (22) is connected to the arc-shaped cavity (61) of the sealing plate (64) near the second elastic sheet (65) through a slip ring and a pipe.

8. The hydrogen fuel cell catalyst preparation equipment according to claim 1, characterized in that, It also includes a feed box (3) connected to the top of the mixing cylinder (1), and a discharge pipe (26) connected to the bottom of the mixing cylinder (1), which is used to add solution and carrier into the mixing cylinder (1) and to discharge the carrier after adsorption.

9. The hydrogen fuel cell catalyst preparation equipment according to claim 1, characterized in that, It also includes an ultrasonic device (4) fixedly connected to the outer wall of the mixing cylinder (1) for breaking up carrier agglomerates during the impregnation process.

10. A method for preparing a hydrogen fuel cell catalyst, using the hydrogen fuel cell catalyst preparation equipment according to any one of claims 1-9, characterized in that, Includes the following steps: Step 1: First, add the metal salt solution to the equipment, and then immerse the carrier in the metal salt solution so that the metal ions are adsorbed on the surface of the carrier. Step 2: Then, the carrier and the metal salt solution are mixed and stirred, and the stirring direction is automatically adjusted during the stirring process; Step 3: Simultaneously, the carrier agglomerates settled at the bottom are transported to the top and evenly dispersed onto the liquid surface, which can break up the carrier agglomerates floating on the liquid surface. Step 4: In addition, during the stirring process, the solution on the outside is guided inward to increase the dispersibility of the carrier in the metal salt solution. Step 5: Continue until metal ions are uniformly adsorbed on the carrier surface, forming nanoparticles.

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