An apparatus and system for the preparation of composite platinum in catalyst substrates
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- HARBIN BOAO ENVIRONMENTAL TECHNOLOGY CO LTD
- Filing Date
- 2025-09-01
- Publication Date
- 2026-08-07
AI Technical Summary
[0006]因此，本实用新型要解决的技术问题在于克服现有技术中的杂质清理不干净、烘干不达标的问题，从而提供一种用于催化剂基材中复合金属铂的制备装置及系统
Smart Images
Figure CN224599314U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of catalyst preparation equipment technology, specifically to an apparatus and system for preparing composite platinum in a catalyst substrate. Background Technology
[0002] In the sulfur oxidation process of alkylation waste acid, the conversion rate of sulfur dioxide is the core technical indicator of the sulfur oxidation process. Platinum catalyst, as the bed of the oxidation reaction, is the key factor to promote a more complete oxidation reaction. Platinum metal is the core element participating in the reaction, and its physicochemical properties directly affect the conversion efficiency of sulfur. Therefore, in the preparation process of platinum catalyst, the catalyst substrate composite platinum metal is a core step.
[0003] The conventional production process of platinum catalysts includes: raw material processing of catalyst substrate + catalyst substrate forming + catalyst substrate composite with platinum metal + platinum catalyst inspection and storage; among which, the traditional process of compositing the catalyst substrate with platinum metal involves four steps: water washing + liquid immersion + drying + sintering.
[0004] Throughout the entire production process, it is essential to ensure two key performance indicators: catalyst strength and activity. If the catalyst is sintered directly without proper drying, the internal moisture will evaporate rapidly, leading to the destruction of the catalyst's internal structure and affecting its strength. Furthermore, excessive moisture will accelerate catalyst deactivation and reduce its catalytic effect.
[0005] Therefore, it is essential to control the moisture content within the substrate and the temperature during the drying process at each stage, while simultaneously considering the two key performance indicators of catalyst strength and activity. Conventional catalyst substrates often suffer from issues such as incomplete impurity removal, inadequate drying, and unreasonable temperature profiles during the platinum-coated process, all of which negatively impact the catalyst's strength and activity. Utility Model Content
[0006] Therefore, the technical problem to be solved by this utility model is to overcome the problems of incomplete impurity cleaning and inadequate drying in the prior art, thereby providing a device and system for preparing composite metal platinum in catalyst substrates.
[0007] To address the aforementioned technical problems, this utility model provides an apparatus for preparing composite platinum in a catalyst substrate, comprising: a washing tank containing a neutral aqueous solution for washing the catalyst substrate; a first dryer for drying the washed catalyst substrate once; an impregnation tank containing a platinum nitrate solution for impregnating the dried catalyst substrate; a second dryer for further drying the impregnated catalyst substrate; a sintering furnace for sintering the secondary-dried catalyst substrate, the sintering furnace being equipped with a control box and a gas component measuring instrument, a thermometer, and a pressure measuring structure, the control box being connected to the gas component measuring instrument, thermometer, and pressure measuring structure; and hydrogen and nitrogen cylinders, both connected to the sintering furnace.
[0008] Furthermore, it also includes hydrogen pipelines and nitrogen pipelines, wherein the hydrogen pipeline is connected to a hydrogen cylinder and the nitrogen pipeline is connected to a nitrogen cylinder.
[0009] Furthermore, it also includes a hydrogen flow valve and a nitrogen flow valve, wherein the hydrogen flow valve is located on the hydrogen pipeline and the nitrogen flow valve is located on the nitrogen pipeline.
[0010] Furthermore, it also includes a connecting pipeline for connecting the hydrogen pipeline and the nitrogen pipeline, and a mixing valve is provided on the connecting pipeline.
[0011] Furthermore, it also includes an exhaust pipe, which is disposed on the sintering furnace and is equipped with an exhaust valve.
[0012] Furthermore, the control box is also connected to a hydrogen flow valve, a nitrogen flow valve, and an exhaust valve.
[0013] Furthermore, the immersion tank is made of carbon steel and polyethylene sheet.
[0014] Furthermore, the hydrogen flow valve, nitrogen flow valve, mixing valve, and exhaust valve are solenoid valves.
[0015] Furthermore, the pressure measuring structure is a pressure gauge.
[0016] This invention also provides a system for preparing composite platinum in a catalyst substrate, including the aforementioned apparatus for preparing composite platinum in a catalyst substrate.
[0017] The technical solution of this utility model has the following advantages:
[0018] This utility model provides an apparatus for preparing composite platinum in a catalyst substrate, comprising: a washing tank containing a neutral aqueous solution for washing the catalyst substrate; a first dryer for drying the washed catalyst substrate once; an impregnation tank containing a platinum nitrate solution for impregnating the dried catalyst substrate; a second dryer for further drying the impregnated catalyst substrate; a sintering furnace for sintering the secondary dried catalyst substrate, the sintering furnace being equipped with a control box and a gas component measuring instrument, a thermometer, and a pressure measuring structure, the control box being connected to the gas component measuring instrument, thermometer, and pressure measuring structure; and hydrogen and nitrogen cylinders, both connected to the sintering furnace.
[0019] By using an apparatus for preparing platinum composites in a catalyst substrate, the impurities are thoroughly removed after washing with a neutral aqueous solution during the platinum composite process. Strict control over the moisture content and evaporation rate ensures uniform diffusion of platinum within the catalyst, thereby enhancing the catalyst's strength and activity.
[0020] This apparatus for preparing composite platinum in catalyst substrates is divided into five parts in actual use: neutral aqueous solution washing, primary drying, immersion in platinum nitrate solution, secondary drying, and sintering. Each process operates independently, which facilitates control over moisture content and evaporation rate. Simultaneously, gradient temperature curves are used for temperature control during each drying process to reduce the impact of moisture evaporation and content on catalyst strength and activity. Furthermore, sintering the catalyst in a sintering furnace further removes organic impurities and moisture, ensuring the drying meets standards and further improving catalyst activity and strength. The apparatus boasts a high degree of automation and increased production efficiency.
[0021] The utility model summary section is provided to present the chosen concepts in a simplified form, which will be further described in the detailed embodiments below. The utility model summary section is not intended to identify essential or essential features of this disclosure, nor is it intended to limit the scope of this disclosure. Attached Figure Description
[0022] To more clearly illustrate the specific embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.
[0023] Figure 1A schematic diagram of a device for preparing composite platinum in a catalyst substrate, provided by this utility model;
[0024] Figure 2 A schematic diagram of the immersion tank provided by this utility model.
[0025] Explanation of reference numerals in the attached figures:
[0026] 1. Washing tank; 2. Neutral aqueous solution; 3. Catalyst substrate; 4. First dryer; 5. Immersion tank; 6. Platinum nitrate solution; 7. Second dryer; 8. Sintering furnace; 9. Control box; 10. Gas component measuring instrument; 11. Thermometer; 12. Pressure measuring structure; 13. Hydrogen cylinder; 14. Nitrogen cylinder; 15. Hydrogen pipeline; 16. Nitrogen pipeline; 17. Mixing valve; 18. Hydrogen flow valve; 19. Nitrogen flow valve; 20. Connecting pipeline; 21. Exhaust pipe; 22. Exhaust valve; 23. Carbon steel; 24. Polyethylene sheet. Detailed Implementation
[0027] In the following description, only certain exemplary embodiments are briefly described. As those skilled in the art will recognize, the described embodiments can be modified in various ways without departing from the spirit or scope of this disclosure. Therefore, the drawings and description are to be considered exemplary in nature and not restrictive.
[0028] In the description of this disclosure, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," and "counterclockwise," etc., indicating orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, are only for the convenience of describing this disclosure 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, and therefore should not be construed as a limitation of this disclosure. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the stated features. In the description of this disclosure, "a plurality of" means two or more, unless otherwise explicitly specified.
[0029] In the description of this disclosure, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," and "joint" should be interpreted broadly. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections, electrical connections, or connections that allow for communication; they can refer to direct connections or indirect connections through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this disclosure according to the specific circumstances.
[0030] In this disclosure, unless otherwise expressly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature being directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature being directly above or diagonally above the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.
[0031] The following disclosure provides numerous different embodiments or examples for implementing various structures of this disclosure. To simplify the disclosure, specific examples of components and arrangements are described below. These are merely examples and are not intended to limit the scope of this disclosure. Furthermore, reference numerals and / or letters may be repeated in different examples; such repetition is for simplification and clarity and does not in itself indicate a relationship between the various embodiments and / or arrangements discussed. In addition, various specific examples of processes and materials are provided in this disclosure, but those skilled in the art will recognize the application of other processes and / or the use of other materials.
[0032] The preferred embodiments of this disclosure are described below with reference to the accompanying drawings. It should be understood that the preferred embodiments described herein are for illustration and explanation only and are not intended to limit this disclosure.
[0033] Please see Figures 1 to 2As shown, this utility model provides an apparatus for preparing composite platinum in a catalyst substrate, comprising: a washing tank 1 containing a neutral aqueous solution 2 for washing the catalyst substrate 3; a first dryer 4 for drying the washed catalyst substrate 3 once; an impregnation tank 5 containing a platinum nitrate solution 6 for impregnating the dried catalyst substrate 3; a second dryer 7 for drying the impregnated catalyst substrate 3 a second time; a sintering furnace 8 for sintering the secondary dried catalyst substrate 3, the sintering furnace 8 being equipped with a control box 9 and a gas component measuring instrument 10, a thermometer 11, and a pressure measuring structure 12, the control box 9 being connected to the gas component measuring instrument 10, the thermometer 11, and the pressure measuring structure 12; a hydrogen cylinder 13 and a nitrogen cylinder 14, both connected to the sintering furnace 8.
[0034] The catalyst substrate 3 is washed in a water washing tank 1 with a neutral aqueous solution 2. The pH value of the neutral aqueous solution 2 is between 6.8 and 7, and the temperature is room temperature. The water washing is used to remove acidic or alkaline salt impurities in the micropores of the substrate and eliminate unnecessary side reactions that may be caused by them.
[0035] In the first dryer 4, drying is carried out according to the set short-time drying temperature curve, which is a gradient curve. The control system in the control box 9 adjusts the electric heating time through the feedback of the temperature signal, thereby ensuring that the temperature and time follow the temperature gradient curve.
[0036] The specific operation is as follows: Within 2 hours, the temperature is raised from 20℃ to 150℃ and maintained at this temperature for 8 hours. Then, within 4 hours, the temperature is raised from 150℃ to 300℃ and maintained at this temperature for 10 hours. Afterward, the temperature is uniformly lowered to 30℃ within 7 hours, completing the drying process. The purpose of drying is to evaporate the moisture from the catalyst substrate 3, control the rate of moisture evaporation, ensure the strength and activity of the catalyst substrate 3, and provide conditions for subsequent impregnation.
[0037] In the immersion tank 5, the dried catalyst substrate 3 is placed in the platinum nitrate solution 6 for immersion treatment to ensure that the catalyst substrate 3 is uniformly impregnated with platinum nitrate. The concentration of the platinum nitrate solution 6 is adjusted to between 0.5% and 0.7%.
[0038] In the second dryer 7, the catalyst substrate 3 after impregnation is dried a second time according to the set long-term drying temperature curve. The temperature curve is a gradient curve. The control system in the control box 9 adjusts the electric heating time through the feedback of the temperature signal, so as to ensure that the temperature and time follow the temperature gradient curve.
[0039] The specific operation is as follows: Within 2 hours, the temperature is raised from 20℃ to 150℃ and maintained at this temperature for 10 hours. Then, within 4 hours, the temperature is raised from 150℃ to 280℃ and maintained at this temperature for 20 hours. Afterward, the temperature is uniformly lowered to 30℃ within 7 hours, completing the drying process. The purpose of the secondary drying is to evaporate the moisture from the impregnation solution within the catalyst substrate 3, controlling the rate of moisture evaporation to ensure the strength and activity of the catalyst substrate 3. Simultaneously, during the moisture evaporation process, platinum nitrate further diffuses uniformly within the micropores of the substrate.
[0040] In sintering furnace 8, the substrate after secondary drying is sintered, mainly for the following purposes:
[0041] 1) Remove impurities from the catalyst
[0042] During the sintering process, impurities such as moisture, organic matter, and oxides in the catalyst are eliminated, making the chemical composition of the catalyst purer and thus improving its stability and service life.
[0043] 2) Increase catalyst activity and accelerate reaction rate
[0044] Sintering allows for better dispersion of the active components in the catalyst, resulting in a more developed pore structure, the formation of more micropores and mesopores, and an increase in the specific surface area of the catalyst. This makes it easier for reactants to enter the catalyst surface, accelerating the reaction rate.
[0045] 3) Improve the strength of the catalyst
[0046] Sintering can increase the stability of catalyst materials, enabling them to better withstand reactions under high-temperature environments, thereby improving the strength of the catalyst.
[0047] In the sintering furnace 8, the ratio and flow rate of nitrogen and hydrogen are monitored in real time by a gas composition measuring instrument 10 (the ratio of hydrogen to nitrogen is 1:10, and the flow rate of nitrogen is 20 slm), and the data is fed back to the control system. Hydrogen is used to reduce platinum nitrate to elemental platinum, which is then adsorbed onto the catalyst substrate 3, forming a composite platinum catalyst. Simultaneously, pressure and temperature signals are also transmitted to the control system. The control system uses the parameters from the feedback signals to control the electric heating system in the sintering furnace 8, ensuring that the sintering furnace 8 operates according to the set temperature curve, achieving the optimal effect of composite platinum in the catalyst substrate 3.
[0048] The temperature curve is a stepped curve. The specific operation is as follows: within 21 hours, the temperature is raised from 30℃ to 300℃ and held for 1 hour. Then, within 10 hours, the temperature is raised from 300℃ to 400℃ and held for 1 hour. Then, within 7 hours, the temperature is raised from 300℃ to 400℃ and held for 6 hours. After that, the temperature is gradually reduced. Within 15 hours, the temperature is uniformly reduced to 300℃. Then, within 20 hours, the temperature is uniformly reduced from 300℃ to 180℃. Finally, within 40 hours, the temperature is uniformly reduced from 180℃ to 60℃. Finally, the temperature is allowed to cool naturally to room temperature, and the drying process is complete.
[0049] By using a device for preparing composite platinum in the catalyst substrate, the impurities in the catalyst substrate 3 are more thoroughly removed after washing with a neutral aqueous solution 2 during the composite platinum process. The moisture content and the rate of water evaporation are strictly controlled, and the platinum is evenly distributed in the catalyst, thereby improving the strength and activity of the catalyst.
[0050] This apparatus for preparing composite platinum in catalyst substrates is divided into five parts in actual use: washing with a neutral aqueous solution 2, primary drying, immersion in platinum nitrate solution 6, secondary drying, and sintering. Each process operates independently, which is beneficial for controlling the moisture content and evaporation rate. Simultaneously, a gradient temperature curve is used for temperature control during each drying process to reduce the impact of moisture evaporation and moisture content on catalyst strength and activity. Furthermore, the catalyst is sintered in a sintering furnace 8 to further remove organic impurities and moisture, further improving catalyst activity and strength. The apparatus boasts a high degree of automation and improved production efficiency.
[0051] Among them, sintering furnace 8 is existing technology and will not be described in detail here.
[0052] The washing tank 1 and the immersion tank 5 are each equipped with three zones, each zone containing a corresponding solution. Specifically, the washing tank 1 contains a neutral aqueous solution 2, and the immersion tank 5 contains a platinum nitrate solution 6.
[0053] The apparatus for preparing composite platinum in a catalyst substrate further includes a hydrogen pipeline 15 and a nitrogen pipeline 16, wherein the hydrogen pipeline 15 is connected to a hydrogen cylinder 13 and the nitrogen pipeline 16 is connected to a nitrogen cylinder 14.
[0054] The hydrogen pipeline 15 is connected to the hydrogen cylinder 13, and the nitrogen pipeline 16 is connected to the nitrogen cylinder 14, thereby filling the sintering furnace 8 with hydrogen and nitrogen under the control of the control system in the control box 9.
[0055] Specifically, the apparatus for preparing composite platinum in a catalyst substrate further includes a hydrogen flow valve 18 and a nitrogen flow valve 19. The hydrogen flow valve 18 is located on the hydrogen pipeline 15, and the nitrogen flow valve 19 is located on the nitrogen pipeline 16. The installation of the hydrogen flow valve 18 and the nitrogen flow valve 19 ensures that the amount of hydrogen and nitrogen entering the sintering furnace 8 is controllable and precise, avoiding errors that could affect the overall hydrogen and nitrogen content.
[0056] Meanwhile, the apparatus for preparing composite platinum in the catalyst substrate also includes a connecting pipe 20, which is used to connect the hydrogen pipe 15 and the nitrogen pipe 16, and a mixing valve 17 is provided on the connecting pipe 20.
[0057] The mixing valve 17 ensures that the hydrogen pipeline 15 and the nitrogen pipeline 16 are mixed on the connecting pipeline 20. The mixing valve 17 is used to open and close the connecting pipeline 20, ensuring the accuracy of the gas entering the sintering furnace 8.
[0058] The apparatus for preparing composite platinum in a catalyst substrate also includes an exhaust pipe 21, which is disposed on the sintering furnace 8 and is equipped with an exhaust valve 22. The exhaust pipe 21 and the exhaust valve 22 ensure that the gas generated in the sintering furnace 8 is discharged through the exhaust pipe 21 and the exhaust valve 22.
[0059] In some optional embodiments, the control box 9 of the apparatus for preparing composite platinum in a catalyst substrate is also connected to a hydrogen flow valve 18, a nitrogen flow valve 19, and an exhaust valve 22. The automatic opening and closing of the hydrogen flow valve 18, the nitrogen flow valve 19, and the exhaust valve 22 can be controlled via the control system within the control box 9.
[0060] Specifically, the immersion tank 5 is made of carbon steel 23 and polyethylene plate 24. The carbon steel 23 is arranged in the outer layer, the polyethylene plate 24 is arranged in the inner layer, and the platinum nitrate solution 6 is placed inside the polyethylene plate 24 and is in direct contact with the polyethylene plate 24.
[0061] In this embodiment, the hydrogen flow valve 18, nitrogen flow valve 19, mixing valve 17, and exhaust valve 22 are solenoid valves. The pressure measuring structure 12 is a pressure gauge.
[0062] The specific process steps for composite platinum metal in catalyst substrate 3 are as follows:
[0063] 1. Water washing and drying treatment of catalyst substrate 3: Fill the water washing tank 1 with neutral aqueous solution 2 (pH value between 6.8 and 7), immerse the catalyst substrate 3 (150cm×150cm×150cm in size) in the water washing tank 1 for about 20 seconds, shaking it while immersing, and then put the cleaned catalyst substrate 3 into the first dryer 4, and so on, until the first dryer 4 is full of catalyst substrate 3. Then start the first dryer 4 according to the short-time drying temperature curve for drying. After drying, the catalyst substrate 3 is subjected to liquid immersion treatment.
[0064] 2. Immersion and secondary drying of catalyst substrate 3: Fill the immersion tank 5 with platinum nitrate solution 6 (concentration between 0.5-0.7%), then immerse the dried catalyst substrate 3 in the platinum nitrate solution 6, leave it for 3 seconds, and then take it out and place it in the second dryer 7. Repeat this process until the second dryer 7 is full of immersion catalyst substrate 3. Then start the second dryer 7 according to the long-term drying temperature curve for secondary drying. The dried catalyst substrate 3 is then subjected to sintering treatment.
[0065] 3. Catalyst sintering treatment after impregnation: Place the catalyst after secondary drying into sintering furnace 8, and start or stop automatically according to the set temperature control program.
[0066] The specific steps are as follows:
[0067] First, start the sintering furnace 8 according to the stepped temperature curve and perform the "furnace nitrogen replacement" operation: First, open the mixing valve 17 and the nitrogen flow valve 19, and set the nitrogen inlet flow rate (flow rate value 20slm) on the operation panel of the control box 9. This allows nitrogen to enter the furnace lining of the sintering furnace 8. When the furnace lining pressure monitoring value is positive or at atmospheric pressure, the nitrogen replacement is complete, and the nitrogen flow rate is reduced to 4slm.
[0068] When the temperature rises to 300℃, hydrogen gas is introduced (flow rate 1 slm), and the amount of nitrogen and hydrogen gas is kept constant until the temperature reaches the maximum of 400℃, which is maintained for 6 hours. After that, the temperature begins to decrease. During this process, hydrogen gas reduces platinum nitrate to elemental platinum, which is adsorbed on the catalyst substrate 3 to form a platinum catalyst. When the temperature drops below 300℃, the nitrogen flow valve 19 and the hydrogen flow valve 18 are closed until the internal temperature of the furnace drops to room temperature. At this point, the catalyst sintering process is completed.
[0069] This invention also provides a system for preparing composite platinum in a catalyst substrate, including the aforementioned apparatus for preparing composite platinum in a catalyst substrate.
[0070] Obviously, the above embodiments are merely illustrative examples for clear explanation and are not intended to limit the implementation. Those skilled in the art will recognize that other variations or modifications can be made based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations here. However, obvious variations or modifications derived therefrom are still within the protection scope of this invention.
Claims
1. An apparatus for preparing composite platinum in a catalyst substrate, characterized in that, include: A water washing tank (1) is provided with a neutral aqueous solution (2) for washing the catalyst substrate (3). The first dryer (4) is used to dry the catalyst substrate (3) after water washing once; An immersion tank (5) is provided with a platinum nitrate solution (6), which is used to impregnate the dried catalyst substrate (3). The second dryer (7) is used for secondary drying of the catalyst substrate (3) after impregnation. A sintering furnace (8) is used to sinter the catalyst substrate (3) that has been dried in the secondary process. The sintering furnace (8) is equipped with a control box (9), a gas component measuring instrument (10), a thermometer (11), and a pressure measuring structure (12). The control box (9) is connected to the gas component measuring instrument (10), the thermometer (11), and the pressure measuring structure (12). Hydrogen cylinder (13) and nitrogen cylinder (14) are both connected to sintering furnace (8).
2. The apparatus for preparing composite platinum in a catalyst substrate according to claim 1, characterized in that, It also includes a hydrogen pipeline (15) and a nitrogen pipeline (16), wherein the hydrogen pipeline (15) is connected to a hydrogen cylinder (13) and the nitrogen pipeline (16) is connected to a nitrogen cylinder (14).
3. The apparatus for preparing composite platinum in a catalyst substrate according to claim 2, characterized in that, It also includes a hydrogen flow valve (18) and a nitrogen flow valve (19), wherein the hydrogen flow valve (18) is located on the hydrogen pipeline (15) and the nitrogen flow valve (19) is located on the nitrogen pipeline (16).
4. The apparatus for preparing composite platinum in a catalyst substrate according to claim 3, characterized in that, It also includes a connecting pipe (20) for connecting the hydrogen pipe (15) and the nitrogen pipe (16), and a mixing valve (17) is provided on the connecting pipe (20).
5. The apparatus for preparing composite platinum in a catalyst substrate according to claim 4, characterized in that, It also includes an exhaust pipe (21), which is located on the sintering furnace (8), and an exhaust valve (22) is provided on the exhaust pipe (21).
6. An apparatus for preparing composite platinum in a catalyst substrate according to any one of claims 3-5, characterized in that, The control box (9) is also connected to the hydrogen flow valve (18), the nitrogen flow valve (19), and the exhaust valve (22).
7. The apparatus for preparing composite platinum in a catalyst substrate according to claim 6, characterized in that, The immersion tank (5) is made of carbon steel and polyethylene plate.
8. The apparatus for preparing composite platinum in a catalyst substrate according to claim 6, characterized in that, The hydrogen flow valve (18), nitrogen flow valve (19), mixing valve (17), and exhaust valve (22) are solenoid valves.
9. The apparatus for preparing composite platinum in a catalyst substrate according to claim 6, characterized in that, The pressure measuring structure (12) is a pressure gauge.
10. A system for preparing composite platinum in a catalyst substrate, characterized in that, The apparatus comprising any one of claims 1-9 for preparing composite platinum in a catalyst substrate.