Reaction kettle for efficiently preparing platinum-carbon catalyst
By using ultrasonic vibrating rods and multi-stage stirring mechanisms in the reaction kettle of the platinum carbon catalyst, the problem of uneven dispersion of raw materials is solved, uniform loading of platinum particles is achieved, and the performance and preparation quality of the catalyst are significantly improved.
Patent Information
- Application Number
- CN202420778722.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-04-15
- Publication Date
- 2025-01-21
- Estimated Expiration
- 2034-04-15
AI Technical Summary
In the existing reactor for preparing platinum carbon catalysts, the raw material particles are unevenly dispersed, resulting in insufficient uniformity of platinum particles on the carbon support, affecting the performance of the catalyst.
A reaction kettle for the efficient preparation of platinum carbon catalysts is designed, which uses ultrasonic vibrating rods and multi-stage stirring mechanisms to achieve ultrasonic dispersion and mechanical stirring of raw materials to ensure uniform dispersion of the suspension, and real-time monitoring and regulation of the reduction reaction through temperature sensors. temperature.
Through ultrasonic dispersion and mechanical stirring, the dispersion uniformity of the raw materials is significantly improved, ensuring that the platinum particles are evenly loaded on the carbon carrier, thus improving the performance and preparation quality of the platinum carbon catalyst.
Smart Images
Figure CN222369120U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of catalyst preparation equipment, in particular to a reaction kettle for efficiently preparing platinum-carbon catalysts. Background Art
[0002] Platinum-carbon catalyst is an important industrial catalyst, widely used in fuel cells, chemical synthesis and other fields; the preparation of platinum-carbon catalyst mainly involves the process of loading platinum onto a carbon carrier. During the preparation process, the dispersion degree of the raw materials and the temperature change during the reduction reaction have a great influence on the particle size and crystal state of the platinum-carbon catalyst, and the size and distribution of platinum nanoparticles are the key to determining the performance of platinum-carbon catalysts.
[0003] In the existing reactor for preparing platinum-carbon catalysts, the suspension obtained by mechanically stirring and mixing raw materials such as carbon carriers, polyols, and platinum precursors has the problem of uneven dispersion of raw material particles, resulting in insufficient uniformity of platinum particles loaded on the carbon carrier in the platinum-carbon catalyst prepared by reduction reaction of the suspension with a reducing gas, which affects the performance of the platinum-carbon catalyst. Utility Model Content
[0004] In order to overcome the problem of uneven dispersion of raw material particles in the suspension obtained by mechanically stirring the raw materials in the existing reactor for preparing platinum-carbon catalysts, which affects the performance of the prepared platinum-carbon catalyst, the utility model provides a reactor for efficiently preparing platinum-carbon catalysts.
[0005] Technical solution: A reactor for efficiently preparing platinum-carbon catalysts, comprising a cart, a reactor body, a controller, a pump, a liquid infusion pipe, a gas supply pipe, a connecting pipe, a fixed frame, a tubular continuous flow reactor, an ultrasonic vibrator and a stirring mechanism. The reactor body is fixedly connected to the top of the top plate of the cart, and the reactor body is provided with chamber one and chamber two. The controller is fixedly connected to the bottom of the top plate of the cart, and the pump is fixedly connected to the upper front side of the reactor body. One end of the liquid infusion pipe is connected to the bottom of chamber one, and the other end is connected to the inlet of the pump. The outlet of the pump is connected to a connecting pipe, and the connecting pipe is connected to the gas supply pipe. A fixed frame is fixedly connected in chamber two, and a tubular continuous flow reactor is fixedly connected to the fixed frame. One end of the connecting pipe away from the liquid infusion pipe and the gas supply pipe is connected to the tubular continuous flow reactor. One end of the ultrasonic vibrator is fixedly connected to the top of the reactor body, and the other end penetrates downward through the top of the reactor body and is located inside chamber one. The ultrasonic vibrator and the pump are both electrically connected to the controller, and a stirring mechanism for stirring raw materials is provided in chamber one.
[0006] Furthermore, the stirring mechanism includes a motor, a pulley, a flat belt, a connecting piece, a rotating shaft and a paddle. A motor is installed on the top of the reactor body, and the motor is electrically connected to the controller. There are two pulleys, one of which is fixedly connected to the output shaft of the motor, and the other pulley is rotatably connected to the ultrasonic vibration rod. The flat belt is wound between the two pulleys, and the pulley and the flat belt are both located on the top of the reactor body. The part of the ultrasonic vibration rod located in chamber one is rotatably connected to a connecting piece, and the top end of the connecting piece penetrates upward through the top of the reactor body and is fixedly connected to the pulley away from the motor. The connecting piece is in a triangular shape, and the three corners thereof are rotatably connected to the rotating shaft, and the rotating shaft is fixedly connected to the paddle.
[0007] Furthermore, the stirring mechanism also includes a central gear, planetary gears and annular racks. The part of the ultrasonic vibration rod located in chamber one is fixedly connected to the central gear, the upper ends of the three rotating shafts are fixedly connected to planetary gears, the annular rack is fixedly connected to the upper part of the inner wall of chamber one, all planetary gears are meshed with the central gear, and all planetary gears are meshed with the annular racks.
[0008] Furthermore, at least one feed port is provided at the upper portion of chamber one, and a discharge port is provided at the lower portion of chamber two.
[0009] Furthermore, it also includes a temperature sensor, a hot water pipe and a return pipe. The temperature sensor is fixedly connected to the upper part of the inner wall of the second chamber. One side of the middle part of the second chamber is connected to a hot water pipe, and the other side is connected to a return pipe. Both the hot water pipe and the return pipe are provided with electric control valves. The electric control valves on the hot water pipe and the return pipe and the temperature sensor are electrically connected to the controller.
[0010] Furthermore, the paddle is in contact with an inner wall of the chamber, and at least one square hole is formed on the paddle.
[0011] Compared with the prior art, the beneficial effects of the utility model are:
[0012] 1. The utility model realizes ultrasonic dispersion and mechanical stirring of raw materials by arranging an ultrasonic vibrating rod and a stirring mechanism, thereby obtaining a uniformly dispersed suspension, which is conducive to the full progress of the reduction reaction and enables the platinum particles to be more evenly loaded on the carbon carrier, thereby improving the performance of the prepared platinum-carbon catalyst.
[0013] 2. The utility model realizes real-time monitoring and adjustment of the reduction reaction temperature by setting a temperature sensor, thereby ensuring the stability of the reduction reaction process and improving the preparation quality of the catalyst. BRIEF DESCRIPTION OF THE DRAWINGS
[0014] Figure 1 It is a three-dimensional structural schematic diagram of the utility model.
[0015] Figure 2 For this utility model Figure 1 Enlarged view of point A in the middle.
[0016] Figure 3 It is a cross-sectional view of the reactor body of the utility model.
[0017] Figure 4 It is a three-dimensional structural schematic diagram of the stirring mechanism of the utility model.
[0018] Figure 5 It is an exploded view of the stirring mechanism of the utility model.
[0019] Explanation of the reference numerals: 1- trolley, 2- reactor body, 21- chamber one, 211- feed port, 22- chamber two, 221- temperature sensor, 222- discharge port, 223- hot water pipe, 224- return pipe, 3- controller, 4- pump, 41- infusion pipe, 42- gas pipe, 43- connecting pipe, 5- fixing frame, 6- tubular continuous flow reactor, 7- ultrasonic vibration rod, 8- stirring mechanism, 81- motor, 82- pulley, 83- flat belt, 84- connecting piece, 85- rotating shaft, 86- blade, 87- center gear, 88- planetary gear, 89- ring rack. DETAILED DESCRIPTION
[0020] The present invention is described in detail below with reference to the accompanying drawings and specific embodiments, but is not intended to limit the present invention.
[0021] Embodiment: A reactor for efficiently preparing platinum-carbon catalyst, such as Figure 1-Figure 3 As shown, it includes a cart 1, a reactor body 2, a controller 3, a pump 4, a liquid infusion tube 41, a gas infusion tube 42, a connecting tube 43, a fixing frame 5, a tubular continuous flow reactor 6, an ultrasonic vibrating rod 7 and a stirring mechanism 8. The top of the top plate of the cart 1 is fixedly connected to the reactor body 2, and the reactor body 2 is provided with a chamber 1 21 and a chamber 2 22. The bottom of the top plate of the cart 1 is fixedly connected to the controller 3, and the upper front part of the reactor body 2 is fixedly connected to the pump 4. One end of the liquid infusion tube 41 is connected to the bottom of the chamber 1 21, and the other end thereof is connected to the inlet of the pump 4. The outlet of the pump 4 is connected to a connecting pipe 43, and the connecting pipe 43 is connected to an air supply pipe 42. A fixed frame 5 is fixedly connected in the chamber 22, and a tubular continuous flow reactor 6 is fixedly connected to the fixed frame 5. One end of the connecting pipe 43 away from the liquid supply pipe 41 and the air supply pipe 42 is connected to the tubular continuous flow reactor 6. One end of the ultrasonic vibration rod 7 is fixedly connected to the top of the reactor body 2, and the other end penetrates downward through the top of the reactor body 2 and is located inside the chamber 1 21. The ultrasonic vibration rod 7 and the pump 4 are both electrically connected to the controller 3, and a stirring mechanism 8 is provided in the chamber 1 21.
[0022] like Figure 4 and Figure 5As shown, the stirring mechanism 8 includes a motor 81, a pulley 82, a flat belt 83, a connecting piece 84, a rotating shaft 85 and a paddle 86. The motor 81 is installed on the top of the reactor body 2, and the motor 81 is electrically connected to the controller 3. There are two pulleys 82, one of which is fixedly connected to the output shaft of the motor 81, and the other pulley 82 is rotatably connected to the ultrasonic vibration rod 7. The flat belt 83 is wound between the two pulleys 82, and the pulley 82 and the flat belt 83 are both located at the top of the reactor body 2. The part of the ultrasonic vibration rod 7 located in the chamber 21 is rotatably connected to the connecting piece 84, and the top of the connecting piece 84 penetrates the top of the reactor body 2 upward and is fixedly connected to the pulley 82 away from the motor 81. The connecting piece 84 is triangular in shape, and the three corners thereof are rotatably connected to the rotating shaft 85, and the rotating shaft 85 is fixedly connected to the paddle 86. The paddle 86 contacts the inner wall of the chamber 21, and a plurality of square holes are opened on the paddle 86.
[0023] like Figure 4 and Figure 5 As shown, the stirring mechanism 8 also includes a central gear 87, a planetary gear 88 and an annular rack 89. The part of the ultrasonic vibration rod 7 located in the chamber 21 is fixedly connected to the central gear 87, and the upper ends of the three rotating shafts 85 are fixedly connected to the planetary gears 88. The annular rack 89 is fixedly connected to the upper part of the inner wall of the chamber 21. All planetary gears 88 are meshed with the central gear 87, and all planetary gears 88 are meshed with the annular rack 89. When the connecting member 84 rotates, the rotating shaft 85 will rotate around the ultrasonic vibration rod 7 with the connecting member 84. Since it is fixedly connected to the rotating shaft 85 and the planetary gears 88 are meshed with the central gear 87 and the annular rack 89, the planetary gears 88 will drive the rotating shaft 85 to rotate while rotating around the ultrasonic vibration rod 7 with the rotating shaft 85.
[0024] like Figure 3 As shown, two feed ports 211 are provided at the upper portion of chamber 1 21 , and a discharge port 222 is provided at the lower portion of chamber 22 .
[0025] like Figure 3 As shown, it also includes a temperature sensor 221, a hot water pipe 223 and a return pipe 224. The temperature sensor 221 is fixedly connected to the upper inner wall of the chamber 22. One side of the middle of the chamber 22 is connected to the hot water pipe 223, and the other side is connected to the return pipe 224. The hot water pipe 223 and the return pipe 224 are both provided with electric control valves. The electric control valves on the hot water pipe 223 and the return pipe 224 and the temperature sensor 221 are all electrically connected to the controller 3. When hot water is introduced into the chamber 22 through the hot water pipe 223, the temperature sensor 221 can monitor the temperature of the hot water inside the chamber 22.
[0026] When in use, raw materials such as carbon carrier, polyol, platinum precursor and alkali are put into the chamber 21 through the feed port 211 for mixing, and the ultrasonic vibration rod 7 is controlled by the controller 3 to ultrasonically disperse the mixed solution. The dispersion degree of the raw materials in the mixed solution can be greatly enhanced by the ultrasonic cavitation effect, so as to obtain a uniformly dispersed suspension. At the same time, the motor 81 is controlled by the controller 3 to drive the pulley 82 to rotate, and then the flat belt 83 is used to drive the pulley 82 and the connecting piece 84 away from the motor 81 to rotate, so that the planetary gear 88 revolves around the center The heart gear 87 rotates along the annular rack 89, and due to the meshing of the planetary gear 88 with the central gear 87, the planetary gear 88 will rotate, thereby driving the corresponding rotating shaft 85 and the paddle 86 to rotate, stirring the mixed liquid in the chamber 21, so that the raw materials are fully mixed, and the effect of ultrasonic dispersion is improved. In addition, due to the adhesion of the raw materials, part of the raw materials will adhere to the inner wall of the chamber 21, causing the loss of raw materials. Through the contact between the paddle 86 and the inner wall of the chamber 21, the paddle 86 can remove the raw materials attached to the inner wall of the chamber 21 when rotating. The raw materials are scraped off to prevent waste. The holes on the paddle 86 enable the paddle 86 to form stronger vortex and shear force when stirring the raw materials, further improving the stirring effect. When the suspension is prepared, the controller 3 controls the pump 4 to pump the suspension in the cavity 21 to the connecting pipe 43 through the liquid infusion pipe 41. At the same time, the external air pump inputs the reducing gas into the connecting pipe 43 through the gas infusion pipe 42 to mix with the suspension. The mixed liquid and gas enter the tubular continuous flow reactor 6 for reduction reaction. Hot water is introduced into the chamber through the hot water pipe 223. The water flows into the interior of the chamber 22 and is returned through the return pipe 224, thereby circulating water to heat the tubular continuous flow reactor 6. The temperature sensor 221 monitors the temperature in the chamber 22 in real time and feeds the data back to the controller 3. The controller 3 controls the electric control valves of the hot water pipe 223 and the return pipe 224 according to the temperature data, thereby adjusting the temperature in the chamber 22 to ensure the stability of the reduction reaction process. Finally, the suspension containing the platinum-carbon catalyst is discharged through the discharge port 222, and the required platinum-carbon catalyst can be obtained by subsequent filtration, cleaning and drying.
[0027] The above is a detailed introduction to the present application. Specific examples are used in this article to illustrate the principles and implementation methods of the present application. The description of the above embodiments is only used to help understand the method of the present application and its core idea. At the same time, for general technical personnel in this field, according to the idea of the present application, there will be changes in the specific implementation methods and application scope. In summary, the content of this specification should not be understood as a limitation on the present application.
Claims
1. A reactor for efficiently preparing platinum-carbon catalyst, characterized in that: The invention comprises a cart (1), a reactor body (2), a controller (3), a pump (4), a liquid infusion pipe (41), a gas infusion pipe (42), a connecting pipe (43), a fixing frame (5), a tubular continuous flow reactor (6), an ultrasonic vibrating rod (7) and a stirring mechanism (8). The top of the top plate of the cart (1) is fixedly connected to the reactor body (2). The reactor body (2) is provided with a chamber 1 (21) and a chamber 2 (22). The bottom of the top plate of the cart (1) is fixedly connected to the controller (3). The upper front part of the reactor body (2) is fixedly connected to the pump (4). One end of the liquid infusion pipe (41) is connected to the bottom of the chamber 1 (21), and the other end is connected to the inlet of the pump (4). The pump (4) The outlet is connected to a connecting pipe (43), and the connecting pipe (43) is connected to a gas supply pipe (42). A fixed frame (5) is fixedly connected inside chamber two (22), and a tubular continuous flow reactor (6) is fixedly connected to the fixed frame (5). One end of the connecting pipe (43) away from the liquid supply pipe (41) and the gas supply pipe (42) is connected to the tubular continuous flow reactor (6). One end of the ultrasonic vibration rod (7) is fixedly connected to the top of the reactor body (2), and the other end of the ultrasonic vibration rod (7) penetrates downward through the top of the reactor body (2) and is located inside chamber one (21). The ultrasonic vibration rod (7) and the pump (4) are both electrically connected to the controller (3). A stirring mechanism (8) for stirring the raw materials is provided inside chamber one (21).
2. A reactor for efficiently preparing a platinum-carbon catalyst according to claim 1, characterized in that: The stirring mechanism (8) comprises a motor (81), a pulley (82), a flat belt (83), a connecting piece (84), a rotating shaft (85) and a paddle (86). The motor (81) is installed on the top of the reactor body (2). The motor (81) is electrically connected to the controller (3). There are two pulleys (82), one of which is fixedly connected to the output shaft of the motor (81), and the other pulley (82) is rotationally connected to the ultrasonic vibration rod (7). The flat belt (83) is wound around the two pulleys. The pulley (82) and the flat belt (83) are both located at the top of the reactor body (2). The part of the ultrasonic vibrating rod (7) located in the chamber 1 (21) is rotatably connected with a connecting piece (84). The top of the connecting piece (84) passes through the top of the reactor body (2) upward and is fixedly connected to the pulley (82) away from the motor (81). The connecting piece (84) is triangular in shape, and its three corners are rotatably connected with a rotating shaft (85), and the rotating shaft (85) is fixedly connected with a paddle (86).
3. A reactor for efficiently preparing a platinum-carbon catalyst according to claim 2, characterized in that: The stirring mechanism (8) also includes a central gear (87), planetary gears (88) and an annular rack (89); the portion of the ultrasonic vibration rod (7) located in the chamber one (21) is fixedly connected to the central gear (87); the upper ends of the three rotating shafts (85) are fixedly connected to the planetary gears (88); the annular rack (89) is fixedly connected to the upper part of the inner wall of the chamber one (21); all the planetary gears (88) are meshed with the central gear (87); and all the planetary gears (88) are meshed with the annular rack (89).
4. A reactor for efficiently preparing a platinum-carbon catalyst according to claim 3, characterized in that: At least one material inlet (211) is provided at the upper portion of chamber one (21), and a material outlet (222) is provided at the lower portion of chamber two (22).
5. A reactor for efficiently preparing a platinum-carbon catalyst according to claim 4, characterized in that: The invention also comprises a temperature sensor (221), a hot water pipe (223) and a return pipe (224); the temperature sensor (221) is fixedly connected to the upper part of the inner wall of the second chamber (22); one side of the middle part of the second chamber (22) is connected to the hot water pipe (223), and the other side is connected to the return pipe (224); both the hot water pipe (223) and the return pipe (224) are provided with electric control valves; and the electric control valves on the hot water pipe (223) and the return pipe (224) and the temperature sensor (221) are electrically connected to the controller (3).
6. A reactor for efficiently preparing a platinum-carbon catalyst according to claim 5, characterized in that: The paddle (86) contacts the inner wall of the chamber (21), and at least one square hole is formed on the paddle (86).