Preparation device of carbon nanotube supported catalyst

Abstract

The utility model relates to the technical field of preparation of catalysts for fuel cells, and discloses a preparation device of a carbon nanotube supported catalyst, which comprises a fan, a reaction kettle, a vacuum freeze dryer and an evaporator, the reaction kettle comprises a kettle body, a feed port is arranged on the kettle body, a discharge port is arranged at the bottom of the kettle body, and the vacuum freeze dryer is connected with the fan. The kettle body is provided with a discharge port, the discharge port is connected with the vacuum freeze dryer, a spray header and a flow guide plate are arranged in the kettle body, the flow guide plate is located between the discharge port and the spray header, the evaporator comprises a closed box body used for containing chloroplatinic acid, an atomizer is arranged in the box body, an outlet of the box body is connected with the spray header, and the spray header is connected with the flow guide plate. A gas inlet of the fan is used for being connected with nitrogen, a gas outlet of the fan is connected with the reaction kettle through a gas inlet pipe, the gas inlet pipe is located between the guide plate and the discharge port, and a preheater is arranged on the gas inlet pipe. The device can simplify the preparation process of the catalyst and improve the preparation efficiency.

Description

Technical Field

[0001] The utility model relates to the technical field of preparation of catalysts for fuel cells, in particular to a preparation device for carbon nanotube-loaded catalysts. Background Art

[0002] Currently, carbon nanotube-supported catalysts are increasingly used in fuel cells; however, existing preparation methods are complex and have low production efficiency. Utility Model Content

[0003] In order to solve the above technical problems, the utility model provides a preparation device for a carbon nanotube-supported catalyst, which simplifies the production process and improves the preparation efficiency.

[0004] The technical solution adopted by the utility model to solve its technical problems is:

[0005] A preparation device for a carbon nanotube-supported catalyst comprises a blower, a reactor, a vacuum freeze dryer and an evaporator, wherein the reactor comprises a reactor body, a feed port is arranged on the reactor body, a discharge port is arranged at the bottom of the reactor body, the discharge port is connected to the vacuum freeze dryer, a spray head and a guide plate are arranged inside the reactor body, and the guide plate is located between the discharge port and the spray head, the evaporator comprises a closed box for placing chloroplatinic acid, an atomizer is arranged inside the box, the outlet of the box is connected to the spray head, the air inlet of the blower is used to connect nitrogen, the air outlet of the blower is connected to the reactor through an air inlet pipe, and the air inlet pipe is located between the guide plate and the discharge port, and a preheater is arranged on the air inlet pipe.

[0006] Preferably, the shower head comprises a first shower head and a second shower head located below the first shower head, and the first shower head and the second shower head each comprise a plurality of shower heads.

[0007] Preferably, the nozzle comprises a liquid inlet portion and a liquid outlet portion, the liquid inlet portion is provided with a liquid inlet hole extending to both ends thereof, and the liquid outlet portion is provided with a liquid outlet hole connected to the liquid inlet hole.

[0008] Preferably, the first spray head includes a plurality of first spray heads, and the second spray head includes a plurality of second spray heads arranged in one-to-one correspondence with the first spray heads, and the liquid outlet holes of the first spray heads and the second spray heads have different angles.

[0009] Preferably, the center line of the liquid outlet hole of the first nozzle intersects with the center line of the liquid outlet hole of the second nozzle, and the angle a between the center lines of the corresponding liquid inlet parts is 20 to 40 degrees.

[0010] Preferably, the first spray head and the second spray head both comprise a main water pipe, one end of the main water pipe is connected to the evaporator, and the other end is circumferentially provided with a plurality of water distribution pipes, and the water distribution pipes are evenly distributed with a plurality of the spray heads along the length direction thereof.

[0011] Preferably, a main liquid pipe is provided on the box body, the other end of the main liquid pipe is connected to two liquid distribution pipes, and the other ends of the two liquid distribution pipes are respectively connected to the first spray head and the second spray head.

[0012] Preferably, a liquid return port is provided on the top of the box body, and a liquid return pipe is connected between the main liquid pipe and the liquid return port.

[0013] Preferably, a regulator is included, and there are multiple atomizers, and the multiple atomizers are all electrically connected to the regulator.

[0014] A preparation device for a carbon nanotube-loaded catalyst according to an embodiment of the utility model has the following beneficial effects compared with the prior art: a spray head and a guide plate are arranged inside a kettle body, an atomizer is arranged inside a box body of an evaporator, an outlet of the box body is connected to the spray head, and at the same time, an air outlet of a fan is connected to the reactor through an air inlet pipe, and a preheater is arranged on the air inlet pipe. During preparation, carbon nanotube powder is added into the reactor through a feed port, and then heated nitrogen is blown into the reactor through a guide plate, and then the atomizer is opened to atomize a chloroplatinic acid solution, and the atomized chloroplatinic acid solution enters the reactor to react with the carbon nanotubes to produce a catalyst, and the produced catalyst enters a vacuum freeze dryer for drying and freezing, and the production is completed, the production process is simple, and a spray head is used to spray the atomized chloroplatinic acid solution, and a guide plate is used to transport the mixed nitrogen and carbon nanotubes, so that the raw materials are fully mixed, thereby ensuring the preparation efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a structural schematic diagram of a preparation device for a carbon nanotube-supported catalyst of the utility model.

[0016] Figure 2 It is a structural schematic diagram of the sprinkler head of the utility model.

[0017] Figure 3 It is a schematic diagram of the structure of the first nozzle and the second nozzle of the utility model.

[0018] Wherein: 1- fan, 2- reactor, 3- vacuum freeze dryer, 4- reactor body, 5- first spray head, 6- second spray head, 7- guide plate, 8- box body, 9- atomizer, 10- preheater, 11- liquid inlet hole, 12- liquid outlet hole, 13- first spray head, 14- second spray head, 15- main water pipe, 16- water distribution pipe, 17- main liquid pipe, 18- liquid distribution pipe, 19- liquid return pipe, 20- regulator. DETAILED DESCRIPTION

[0019] The following is a further detailed description of the specific implementation of the present invention in conjunction with the accompanying drawings and examples. The following examples are used to illustrate the present invention, but are not intended to limit the scope of the present invention.

[0020] It should be noted that in the description of this application, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of this utility model, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0021] In the present invention, unless otherwise clearly specified and limited, the terms "install", "connect", "connect", "fix" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0022] like Figure 1 As shown, a preparation device of a carbon nanotube-loaded catalyst according to a preferred embodiment of the utility model comprises a blower 1, a reactor 2, a vacuum freeze dryer 3 and an evaporator, wherein the reactor comprises a kettle body 4, wherein a feed port is provided on the kettle body 4, a discharge port is provided at the bottom of the kettle body 4, the discharge port is connected to the vacuum freeze dryer 3, a spray head and a guide plate 7 are provided inside the kettle body 4, and the guide plate 7 is located between the discharge port and the spray head, the evaporator comprises a closed box body 8 for placing chloroplatinic acid, an atomizer 9 is provided inside the box body 8, and the outlet of the box body 8 is connected to the spray head, the air inlet of the blower 1 is used to connect nitrogen, the air outlet of the blower 1 is connected to the reactor through an air inlet pipe, and the air inlet pipe is located between the guide plate 7 and the discharge port, and a preheater 10 is provided on the air inlet pipe.

[0023] The guide plate 7 is provided with a plurality of air outlet holes to ensure uniformity of air outlet. The guide plate 7 can be opened and closed, for example, a cover body is hinged on the air outlet hole, the cover body can be opened under the action of nitrogen gas flow, and the cover body is closed without the action of nitrogen. In addition, the guide plate 7 can be connected to the inner wall of the kettle body by a hinged manner, and the guide plate can be rotated when discharging; the guide plate can also be made by splicing and opened when discharging.

[0024] During the preparation, first open the guide plate 7 and add the carbon nanotube powder into the reactor; the flow rate of nitrogen is 500-2000L / min, which is adjusted according to the weight of the carbon nanotubes, the nitrogen is heated to 60-300°C, and the nitrogen is blown into the reactor; after 5-10 minutes, the ultrasonic atomizer is turned on; after reacting for 1-12 hours, the nitrogen is turned off, and the guide plate 7 is opened to discharge the material; vacuum freeze-drying is performed at -40°C.

[0025] The preparation device of the carbon nanotube-loaded catalyst based on the above technical features is characterized in that a spray head and a guide plate 7 are arranged inside the kettle body 4, an atomizer 9 is arranged inside the box body 8 of the evaporator, the outlet of the box body 8 is connected to the spray head, and at the same time, the air outlet of the fan 1 is connected to the reactor through an air inlet pipe, and a preheater 10 is arranged on the air inlet pipe. During the preparation, carbon nanotube powder is added into the reactor through the feed port, and then the heated nitrogen is blown into the reactor through the guide plate 7, and then the atomizer is opened to atomize the chloroplatinic acid solution, and the atomized chloroplatinic acid solution enters the reactor to react with the carbon nanotubes to produce a catalyst. The produced catalyst is finally dried and frozen in a vacuum freeze dryer, and the production is completed. The production process is simple, and the atomized chloroplatinic acid solution is sprayed with a spray head, and the mixed nitrogen and carbon nanotubes are transported by the guide plate, so that the raw materials are fully mixed, thereby ensuring the preparation efficiency.

[0026] Please refer to the attached Figure 2 In this embodiment, the spray head includes a first spray head 5 and a second spray head 6 located below the first spray head 5, and the first spray head 5 and the second spray head 6 each include a plurality of spray heads. The first spray head 5 and the second spray head 6 each include a main water pipe 15, one end of the main water pipe 15 is connected to the evaporator, and the other end is circumferentially provided with a plurality of water distribution pipes 16, and the water distribution pipe 16 is evenly distributed with a plurality of the spray heads along its length direction. Therefore, the atomized chloroplatinic acid solution is not only sprayed from two layers during spraying, but each layer includes a plurality of spray heads, thereby fully ensuring the full mixing of the chloroplatinic acid solution and the carbon nanotubes, ensuring the subsequent reaction effect, and improving the production efficiency.

[0027] Please refer to the attached Figure 3In this embodiment, the nozzle includes a liquid inlet and a liquid outlet. The liquid inlet is provided with a liquid inlet hole 11 extending to both ends thereof, and the liquid outlet is provided with a liquid outlet 12 connected to the liquid inlet 11. After the atomized chloroplatinic acid solution enters the water distribution pipe 16 from the main water pipe 15, it enters the liquid inlet 11 and is finally discharged from the liquid outlet 12. In order to ensure that the two layers have different spraying angles, thereby ensuring the overall spraying effect inside the kettle body 4, the first spray head 5 includes a plurality of first spray heads 13, and the second spray head 6 includes a plurality of second spray heads 14 arranged one by one with the first spray head 13, and the angles of the liquid outlet 12 of the first spray head 13 and the second spray head 14 are different. Specifically, the center line of the liquid outlet 12 of the first spray head 13 intersects with the center line of the liquid outlet 12 of the second spray head 14, and the angle a between the center lines of the corresponding liquid inlet is 20 to 40 degrees, preferably 30 degrees.

[0028] In this embodiment, the box body 8 is provided with a main liquid pipe 17, and the other end of the main liquid pipe 17 is connected to two liquid distribution pipes 18, and the other ends of the two liquid distribution pipes 18 are respectively connected to the first spray head 5 and the second spray head 6, so as to realize the connection between the box body 8 and the first spray head 5 and the second spray head 6. At the same time, a liquid return port is provided on the top of the box body 8, and a liquid return pipe 19 is connected between the main liquid pipe 17 and the liquid return port. When there is excess atomized chloroplatinic acid solution, it can be converged to the box body 8 through the liquid return pipe 19, so as to avoid the waste of excess chloroplatinic acid solution and save costs.

[0029] In this embodiment, in order to ensure the atomization effect, the atomizer 9 can be set to multiple, but in actual use, the atomization rate needs to be selected according to the actual situation, so the multiple atomizers 9 do not always work at the same time. For the convenience of control, a regulator 20 can be set, and the multiple atomizers 9 are all electrically connected to the regulator 20. When working, the regulator 20 controls the work of the atomizer 9 in real time as needed to ensure the atomization amount of the chloroplatinic acid solution. The atomizer adopts an ultrasonic atomizer to ensure the atomization effect.

[0030] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and substitutions can be made without departing from the technical principle of the present invention. These improvements and substitutions should also be regarded as the protection scope of the present invention.

Claims

1. A device for preparing a carbon nanotube-supported catalyst, characterized in that: It includes a fan, a reactor, a vacuum freeze dryer and an evaporator. The reactor includes a reactor body, a feed port is provided on the reactor body, a discharge port is provided at the bottom of the reactor body, the discharge port is connected to the vacuum freeze dryer, a spray head and a guide plate are provided inside the reactor body, and the guide plate is located between the discharge port and the spray head. The evaporator includes a closed box for placing chloroplatinic acid, an atomizer is provided inside the box, and the outlet of the box is connected to the spray head. The air inlet of the fan is used to connect nitrogen, and the air outlet of the fan is connected to the reactor through an air inlet pipe, and the air inlet pipe is located between the guide plate and the discharge port. A preheater is provided on the air inlet pipe.

2. The device for preparing a carbon nanotube-supported catalyst according to claim 1, characterized in that: The shower head includes a first shower head and a second shower head located below the first shower head, and the first shower head and the second shower head each include a plurality of shower heads.

3. The device for preparing a carbon nanotube-supported catalyst according to claim 2, characterized in that: The nozzle comprises a liquid inlet portion and a liquid outlet portion. The liquid inlet portion is provided with a liquid inlet hole extending to both ends thereof, and the liquid outlet portion is provided with a liquid outlet hole connected to the liquid inlet hole.

4. The device for preparing a carbon nanotube-supported catalyst according to claim 3, characterized in that: The first spray head includes a plurality of first spray heads, and the second spray head includes a plurality of second spray heads arranged in one-to-one correspondence with the first spray heads. The liquid outlet holes of the first spray heads and the second spray heads have different angles.

5. The device for preparing a carbon nanotube-supported catalyst according to claim 4, characterized in that: The center line of the liquid outlet hole of the first nozzle intersects with the center line of the liquid outlet hole of the second nozzle, and the angle a between the center lines of the corresponding liquid inlet parts is 20 to 40 degrees.

6. The device for preparing a carbon nanotube-supported catalyst according to claim 2, characterized in that: The first spray head and the second spray head both include a main water pipe, one end of the main water pipe is connected to the evaporator, and the other end is circumferentially provided with a plurality of water distribution pipes, and the water distribution pipes are evenly distributed with a plurality of the spray heads along the length direction thereof.

7. The device for preparing a carbon nanotube-supported catalyst according to claim 2, characterized in that: The box body is provided with a main liquid pipe, the other end of which is connected to two liquid distribution pipes, and the other ends of the two liquid distribution pipes are respectively connected to the first spray head and the second spray head.

8. The device for preparing a carbon nanotube-supported catalyst according to claim 7, characterized in that: A liquid return port is provided on the top of the box body, and a liquid return pipe is connected between the main liquid pipe and the liquid return port.

9. The device for preparing a carbon nanotube-supported catalyst according to any one of claims 1 to 8, characterized in that: It comprises a regulator, and there are multiple atomizers, and the multiple atomizers are all electrically connected to the regulator.

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