Joule hot ammonia decomposition hydrogen production reactor applied to mobile terminal

Abstract

The invention discloses a Joule hot ammonia decomposition hydrogen production reactor applied to a mobile end in the technical field of ammonia decomposition hydrogen production. The Joule hot ammonia decomposition hydrogen production reactor comprises an inlet end cover, a shell, an insulating seat, an ammonia gas inlet, an outlet end cover, a positive electrode, a negative electrode, a decomposed gas outlet, a conductive overline, a reaction channel, an ammonia gas inlet cavity, a supporting plate, a tube plate, a decomposed gas outlet cavity and an alloy carrier support. Heat is directly supplied to the ammonia decomposition reaction in the mode that the conductive alloy carrier is electrified to generate Joule heat, the heat transfer process is reduced to the maximum extent, the temperature of a catalyst bed can be rapidly increased, energy loss and starting time are reduced, and the device has the advantages of being rapid in response, simple in structure, high in hydrogen production rate per unit volume and the like.

Description

Technical Field

[0001] The present invention relates to a reactor in the technical field of ammonia decomposition for hydrogen production, and particularly to a Joule heat ammonia decomposition for hydrogen production reactor applied to mobile terminals, which generates Joule heat by energizing a conductive alloy carrier. Background Art

[0002] Under the background of the dual-carbon strategy, the global demand for green alternative energy is increasing continuously. As two possible zero-carbon fuels, ammonia and hydrogen have received extensive attention. Hydrogen storage with ammonia is an effective means to solve the difficult storage and transportation of hydrogen, and hydrogen-assisted combustion of ammonia is an effective method to solve the problem of ammonia combustion. On-site ammonia decomposition for hydrogen production can connect "ammonia hydrogen storage" and "hydrogen-assisted ammonia", realizing the organic integration and application of ammonia-hydrogen fuels. This technology has very bright application prospects in ammonia fuel engines.

[0003] However, at present, the ammonia hydrogen production technology for mobile terminals still has problems such as insufficient response speed and low hydrogen production rate per unit volume. The currently used electric heating ammonia decomposition for hydrogen production reactor needs to transfer heat over a long distance between the walls, so the startup speed is slow. The self-heating reactor is difficult to manufacture, has a complex structure, and has high requirements for the reactor. In addition, the fuel source is also a major problem.

[0004] In the prior art, there is an invention patent with the authorization number CN214716493U and the name of an ammonia decomposition reaction device. The device includes a heater or a pre-reactor and a reactor. The reactor is a cavity, and a first partition, several pipes, a gas distributor, and a second partition are arranged inside the reactor. By setting the pre-reactor, the catalytic combustion reaction can be started at room temperature to raise the temperature of the reactor to 350 - 600 °C for ammonia decomposition reaction; or, first use the heater to heat the reactor, and after it reaches 200 - 350 °C, start the catalytic combustion reaction, and then turn off the heater, and use the heat released by the catalytic combustion reaction to further raise the temperature of the reactor to 350 - 600 °C for ammonia decomposition reaction.

[0005] This invention uses electric heating or combustion reaction as the heat source for ammonia decomposition reaction. However, this invention has the following deficiencies: First, the cavity where electric heating and combustion heat supply are located is not in the same place as the cavity where the reaction substances are located, so the startup speed is still relatively slow; second, the device structure is complex. Summary of the Invention

[0006] In view of the deficiencies of the prior art, the present invention provides a Joule heat ammonia decomposition for hydrogen production reactor applied to mobile terminals, which directly supplies heat for ammonia decomposition reaction by generating Joule heat through energizing a conductive alloy carrier, minimizing the heat transfer process, quickly raising the temperature of the catalyst bed layer, reducing energy loss and startup time, and having the advantages of fast response, simple structure, and high hydrogen production rate per unit volume.

[0007] The present invention is realized through the following technical solutions. The present invention includes an outlet end cover, a housing, an insulating seat, an ammonia inlet, an inlet end cover, a positive electrode, a negative electrode, a decomposition gas outlet, a conductive jumper wire, a reaction channel, an ammonia inlet cavity, a support plate, a tube plate, a decomposition gas outlet cavity, and an alloy carrier support; the ammonia inlet, the ammonia inlet cavity, the reaction channel, the decomposition gas outlet cavity, and the decomposition gas outlet are sequentially connected in series; the outer wall surface of the ammonia inlet cavity is the inlet end cover, the outer wall surface of the decomposition gas outlet cavity is the outlet end cover, the reaction channels are evenly arranged in the housing, the outlet end cover, the inlet end cover, and the housing are connected together through a square flange, and there is an ammonia-resistant rubber gasket between the flanges; the tube plates are arranged at both ends of the housing, the support plates are arranged in the middle positions at both ends of the housing, both ends of the reaction channels are tightly welded to the tube plates, and the reaction channels pass through the support plates and are fixed to the support plates; the reaction channels are nickel alloy cylinders, and the inside thereof is an alloy carrier support wrapped in a wave shape layer by layer. The carrier material is a conductive nickel alloy, and a catalyst beneficial to the ammonia decomposition reaction is coated thereon; there is a square notch on the housing, and the insulating seat is clamped in the notch, and the positive electrode and the negative electrode are led out from the insulating seat; the positive electrode is connected to the first reaction channel, and the reaction channels are sequentially connected through conductive jumper wires, and the last reaction channel is connected to the negative electrode. After connecting the power supply, a complete circuit is formed; each reaction channel is in series connection with each other.

[0008] Further, in the present invention, there are a total of nine reaction channels. The length of the reaction channels is 300 mm, the outer diameter is 70 mm, and the resistance of the nine reaction channels connected in series is about 8 Ω.

[0009] Even further, in the present invention, temperature measuring thermocouples are arranged at the ammonia inlet, the decomposition gas outlet, and the positions near the reaction channels in the decomposition gas outlet cavity.

[0010] Even further, in the present invention, the outside of the housing is coated with a cotton material thermal insulation layer.

[0011] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0012] First, the structure of the reactor device is simple and compact. The heating resistance and the catalyst support carrier are integrated, eliminating the intermediate heat transfer process, and can reach the reaction temperature instantly, start quickly, and meet the cold start and dynamic response requirements of the mobile terminal.

[0013] Second, the hydrogen production rate per unit volume is high. The heating resistance and the catalyst support carrier are integrated, greatly reducing the volume of the reactor, so that a higher hydrogen production rate can be achieved in a smaller space, which is more suitable for the case where the volume of the mobile terminal is limited.

[0014] Third, the energy utilization rate is high. The heat generated is directly used for the ammonia decomposition reaction, eliminating the intermediate heat transfer process and reducing the heat carried away by the flowing ammonia gas, thereby improving the energy utilization rate. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 is a three-dimensional structure diagram of the appearance of an embodiment of the present invention;

[0016] Figure 2 is a schematic diagram of the internal sectional structure of an embodiment of the present invention;

[0017] Figure 3 is a schematic diagram of the reaction channel structure of an embodiment of the present invention;

[0018] Figure 4 is a schematic diagram of the circuit connection mode of an embodiment of the present invention;

[0019] In the figure, 1. outlet end cover, 2. housing, 3. insulating seat, 4. ammonia gas inlet, 5. inlet end cover, 6. positive electrode, 7. negative electrode, 8. decomposition gas outlet, 9. conductive jumper wire, 10. reaction channel, 11. ammonia gas inlet cavity, 12. support plate, 13. tube plate, 14. decomposition gas outlet cavity, 15. alloy carrier support. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0020] In order to make the content described in the present invention easier to understand, the technical solutions of the present invention will be further explained below in conjunction with specific embodiments. The examples are only used to illustrate the present invention, but the present invention is not limited to this content. The operating methods without specific conditions noted in the following examples are usually carried out under conventional conditions or in accordance with the product specifications. The chemical reagents without the manufacturer noted are all conventional drugs that meet the national standards and can be purchased on the market.

[0021] Embodiment

[0022] Such as Figures 1 to 4As shown, the present invention includes: an outlet end cover 1, a shell 2, an insulating seat 3, an ammonia inlet 4, an inlet end cover 5, a positive electrode 6, a negative electrode 7, a decomposition gas outlet 8, a conductive jumper 9, a reaction channel 10, an ammonia inlet chamber 11, a support plate 12, a tube sheet 13, a decomposition gas outlet chamber 14, and an alloy carrier support 15; the ammonia inlet 4, the ammonia inlet chamber 11, the reaction channel 10, the decomposition gas outlet chamber 14 and the decomposition gas outlet 8 are sequentially connected in sequence. The reaction channel 10 is a nickel alloy cylinder, and its interior is an alloy carrier support 15 wrapped in wavy layers. The carrier material is a conductive nickel alloy, and a catalyst that is beneficial to the ammonia decomposition reaction is coated on it. The positive electrode 6 is connected to the first reaction channel 10, and the reaction channels 10 are sequentially connected through the conductive jumper 9. The last reaction channel 10 is connected to the negative electrode 7, and a complete circuit is formed after connecting the power supply; each reaction channel 10 is connected in series, such as Figure 4 As shown, note Figure 4 In order to make the structure clear, the reaction channel structure is simplified and the diameter is reduced. There are 9 reaction channels 10, which are evenly distributed in the shell 2. The two ends of the reaction channel 10 are tightly welded to the tube sheet 13; there is also a support plate 12 between the middle of the shell 2 and the reaction channel 10. The reaction channel 10 is 300mm long and 70mm in outer diameter. The resistance of the 9 reaction channels 10 in series is about 8Ω. The outlet end cover 1, the inlet end cover 5 and the shell 2 are connected together through a square flange. There is an ammonia-resistant rubber gasket between the flanges to ensure the sealing of the connection. There is a square notch on the shell 2, and the insulating seat 3 is stuck in the notch. The positive electrode 6 and the negative electrode 7 are led out from the insulating seat 3. The ammonia inlet 4, the decomposition gas outlet 8 and the decomposition gas outlet cavity 14 are arranged near the reaction channel 10. The temperature measuring thermocouples are used to detect the temperature of the reaction process in real time, feedback and control end input. The outside of the shell 2 is covered with a cotton material insulation layer.

[0023] During the implementation of the present invention, the reactor device has a simple and compact structure, and integrates the heating resistor and the catalyst support carrier, eliminating the intermediate heat transfer process, and can reach the reaction temperature instantly and start quickly, matching the cold start and dynamic response requirements of the mobile terminal. The high unit volume hydrogen production rate integrates the heating resistor and the catalyst support carrier, greatly reducing the volume of the reactor, thereby achieving a higher hydrogen production rate in a smaller space, and is more suitable for situations where the volume of the mobile terminal is limited. The energy utilization rate is high, and the heat generated is directly used for the ammonia decomposition reaction, eliminating the intermediate heat transfer process, reducing the heat carried away by the flow of ammonia, and thus improving the energy utilization rate.

[0024] The above description is only a preferred embodiment of the present invention. Any equivalent changes and modifications made by any technician familiar with the profession within the scope of the patent application of the present invention also belong to the scope covered by the claims attached to the present invention.

Claims

1. A Joule heat ammonia decomposition hydrogen production reactor applied to a mobile terminal, characterized in that: It comprises an outlet end cover (1), a shell (2), an insulating seat (3), an ammonia inlet (4), an inlet end cover (5), a positive electrode (6), a negative electrode (7), a decomposition gas outlet (8), a conductive jumper (9), a reaction channel (10), an ammonia inlet chamber (11), a support plate (12), a tube plate (13), a decomposition gas outlet chamber (14), and an alloy carrier support (15); The ammonia inlet (4), the ammonia inlet chamber (11), the reaction channel (10), the decomposition gas outlet chamber (14) and the decomposition gas outlet (8) are sequentially connected; the outer wall of the ammonia inlet chamber (11) is the inlet end cover (5), the outer wall of the decomposition gas outlet chamber (14) is the outlet end cover (1), the reaction channel (10) is evenly arranged in the shell (2), the outlet end cover (1), the inlet end cover (5) and the shell (2) are connected together by square flanges, and an ammonia-resistant rubber gasket is provided between the flanges; The tube sheet (13) is arranged at both ends of the shell (2), the support plate (12) is arranged at the middle part between the two ends of the shell (2), the two ends of the reaction channel (10) are tightly welded to the tube sheet (13), and the reaction channel (10) passes through the support plate (12) and is fixed to the support plate (12); The reaction channel (10) is a nickel alloy cylinder, the interior of which is a wavy layered alloy carrier support (15), the carrier material is a conductive nickel alloy, and a catalyst that is beneficial to the ammonia decomposition reaction is coated on it; The shell (2) has a square notch, an insulating seat (3) is clamped in the notch, and a positive electrode (6) and a negative electrode (7) are led out from the insulating seat (3); The positive electrode (6) is connected to the first reaction channel (10), and the reaction channels (10) are connected in sequence through the conductive jumper (9). The last reaction channel (10) is connected to the negative electrode (7), and a complete circuit is formed after connecting the power supply; each reaction channel (10) is connected in series.

2. The Joule heat ammonia decomposition hydrogen production reactor applied to a mobile terminal according to claim 1, characterized in that There are nine reaction channels (10) in total. The length of the reaction channel (10) is 300 mm, the outer diameter is 70 mm, and the resistance of the nine reaction channels (10) connected in series is about 8Ω.

3. The Joule heat ammonia decomposition hydrogen production reactor applied to a mobile terminal according to claim 1, characterized in that The ammonia inlet (4), the decomposition gas outlet (8) and the position of the decomposition gas outlet chamber (14) close to the reaction channel (10) are all arranged with temperature measuring thermocouples.

4. The Joule heat ammonia decomposition hydrogen production reactor applied to a mobile terminal according to claim 1, characterized in that The shell (2) is externally coated with a cotton material insulation layer.

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