A coiled ammonia decomposition reaction device and system

Abstract

This invention provides a coiled ammonia decomposition reaction device and system, including a main body, a transmission channel, an ammonia decomposition reaction channel, and an exhaust channel. The main body has an ammonia inlet and a gas outlet. The first port of the transmission channel is connected to the ammonia inlet and extends spirally from the first port towards the center of the main body. The second port of the transmission channel is connected to the inlet end of the ammonia decomposition reaction channel. The ammonia decomposition reaction channel is coiled inside the main body, and its outlet end is connected to the exhaust inlet of the exhaust channel. The exhaust channel extends spirally from the exhaust inlet towards the gas outlet and its exhaust outlet is connected to the gas outlet. The ammonia decomposition reaction channel also contacts multiple heating devices. This coiled ammonia decomposition reaction device features a compact structure and complete and thorough ammonia decomposition. Utilizing the reacted gas to heat the ammonia reduces energy consumption.

Description

Technical Field

[0001] This invention relates to the field of hydrogen energy production technology, specifically to a coiled ammonia decomposition reaction device and system. Background Technology

[0002] Hydrogen energy is an emerging energy source in the 21st century. The combustion of hydrogen produces only water and a large amount of energy, which can be used to fuel power devices such as fuel cells. Therefore, hydrogen is an ideal clean energy source. However, in existing hydrogen applications, the storage and transportation of hydrogen have always been among the challenges. Ammonia is a readily liquefiable, high-energy-density, highly safe, carbon-free, and low-cost hydrogen-rich carrier. Using ammonia as a fuel to decompose it into hydrogen is an efficient and reliable technical approach that can effectively solve the problems of difficult hydrogen storage and high transportation costs. However, existing ammonia decomposition hydrogen production processes require a large amount of energy and catalysts to heat and decompose ammonia, resulting in high equipment energy consumption, complex equipment structures, and poor ammonia decomposition efficiency. The generated gas has a low hydrogen content and contains a large amount of unreacted ammonia.

[0003] Chinese patent CN115353070A discloses an ammonia cracking hydrogen production device, system, and method. The ammonia cracking hydrogen production device includes at least one inlet pipe and a reaction pipe. The reaction pipe is an ammonia cracking reaction chamber, and a heating device is installed inside the reaction pipe. The inlet pipe and the reaction pipe are connected, and a heat exchanger is fitted outside the inlet pipe. The reaction pipe and the heat exchanger are also connected. Ammonia gas enters the inlet pipe and undergoes a decomposition reaction. The reacted gas flows into the heat exchanger and is then discharged. This ammonia cracking hydrogen production device uses the decomposed gas and the heat exchanger to heat the ammonia gas, thereby promoting ammonia decomposition. However, this ammonia cracking hydrogen production device is relatively large, and during the heat exchange process, there may still be problems such as incomplete ammonia decomposition, low purity of the produced hydrogen, or poor heating effect. Therefore, the entire hydrogen production process consumes a large amount of gas and has high overall energy consumption. Summary of the Invention

[0004] To address the shortcomings of existing ammonia decomposition reaction devices that directly use electric heating or heat exchangers for heating, such as uneven heating of ammonia gas, high energy and gas consumption during heating, and low hydrogen purity in the decomposed gas, a coiled ammonia decomposition reaction device is provided. This device features a compact structure, efficient energy utilization, uniform heating and complete decomposition of ammonia gas, low overall energy consumption, high hydrogen content in the decomposed gas, and good heating effect.

[0005] The technical solution adopted by this invention to solve its technical problem is as follows: a coiled ammonia decomposition reaction device, comprising a body, a transmission channel, an ammonia decomposition reaction channel, and an exhaust channel. The body is provided with an ammonia inlet and a gas outlet. The first port of the transmission channel is connected to the ammonia inlet, and the transmission channel extends spirally from the first port towards the center of the body. The second port of the transmission channel is connected to the inlet end of the ammonia decomposition reaction channel. The ammonia decomposition reaction channel is coiled inside the body, and the outlet end of the ammonia decomposition reaction channel is connected to the exhaust inlet of the exhaust channel. The exhaust channel extends spirally from the exhaust inlet towards the gas outlet, and the exhaust outlet of the exhaust channel is connected to the gas outlet. The ammonia decomposition reaction channel also contacts multiple heating devices. When gas enters the transmission channel, it can spirally flow towards the center of the body along the extension directions of the transmission channel and the ammonia decomposition reaction channel. When the gas reaches the center position of the body, it can spirally flow towards the exhaust outlet along the extension direction of the exhaust channel of the ammonia decomposition reaction channel.

[0006] Furthermore, the transmission channel has a curved structure and includes a first transmission channel, a second transmission channel, and a third transmission channel connected in sequence. One end of the first transmission channel is connected to the ammonia inlet, and both ends of the second transmission channel have curved structures. The installation direction of the first transmission channel is perpendicular to the installation direction of the second transmission channel, and the installation direction of the third transmission channel is perpendicular to the installation direction of the second transmission channel. The end of the third transmission channel relative to the second transmission channel has a curved structure.

[0007] Furthermore, the ammonia decomposition reaction channel includes a first reaction channel and a second reaction channel connected in sequence. The first reaction channel is curved, and its inlet end is connected to the transmission channel. The first reaction channel extends spirally from its inlet end toward the center of the body. The outlet end of the first reaction channel is connected to the inlet end of the second reaction channel.

[0008] Furthermore, the second reaction channel is spirally extended from its inlet end toward the gas outlet, and its outlet end is connected to the exhaust channel.

[0009] Furthermore, the ratio between the length of the first reaction channel and the length of the second reaction channel ranges from 1:1 to 1:1.5.

[0010] Furthermore, there is a gap between the first reaction channel and the second reaction channel, and multiple heating devices are installed in the gap between the first reaction channel and the second reaction channel.

[0011] Furthermore, a ruthenium-based catalyst or a nickel-based catalyst is provided in the ammonia decomposition reaction channel.

[0012] Furthermore, the ratio between the length of the transmission channel and the length of the ammonia decomposition reaction channel ranges from 1:3 to 1:5.

[0013] Furthermore, the exhaust passage and the transmission passage are at least partially fitted together.

[0014] The present invention also discloses an ammonia decomposition reaction system, comprising any one of the above-mentioned coiled ammonia decomposition reaction devices, and further comprising:

[0015] Ammonia storage device, which is connected to the ammonia inlet of the main body;

[0016] The adsorption device is connected to the gas outlet of the main body and is used to adsorb ammonia gas in the mixed gas discharged from the gas outlet.

[0017] A hydrogen storage device is connected to the adsorption device and is used to store the gas after it has been adsorbed by the adsorption device.

[0018] This invention discloses a coiled ammonia decomposition reactor. By bending the ammonia decomposition reaction channel inside the main body and setting bent transmission and exhaust channels at both ends of the bent ammonia decomposition reaction channel, the flow distance and flow time of ammonia gas are increased. This allows ammonia gas to come into more complete contact with the catalyst located in the ammonia decomposition reaction channel, promoting faster and more complete decomposition of ammonia gas into hydrogen and nitrogen gas, improving the decomposition effect of ammonia gas and the hydrogen purity of the mixed gas after decomposition, and reducing the ammonia content in the mixed gas. Furthermore, the gas in the exhaust channel is used to assist in heating the ammonia gas, achieving a preheating effect and promoting faster temperature rise of ammonia gas to reach the ammonia decomposition temperature. This reduces the energy consumption of the heating device and the amount of catalyst filling, thereby reducing the energy consumption of the device. During the heating process, because the ammonia decomposition reaction channel is bent and the heating device is placed in the gap of the ammonia decomposition reaction channel, ammonia gas can be fully and completely heated, reducing heat loss during the heating process and improving the overall energy utilization rate. This coiled ammonia decomposition reactor, by coiling the transmission channel, ammonia decomposition reaction channel and exhaust channel, has a relatively compact overall structure and can be applied to ammonia decomposition applications in various scenarios. Attached Figure Description

[0019] To more clearly illustrate the specific embodiments of the present invention, the accompanying drawings used in the specific embodiments will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0020] Figure 1This is a schematic diagram of the coiled ammonia decomposition reaction device described in this invention;

[0021] Figure 2 This is a schematic diagram of the internal structure of the coiled ammonia decomposition reactor described in this invention. Detailed Implementation

[0022] The technical solution of the present invention will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0023] like Figure 1 As shown, the coiled ammonia decomposition reaction device of the present invention includes a body 1, a transmission channel 2, an ammonia decomposition reaction channel 3, and an exhaust channel 4. The body 1 is provided with an ammonia inlet 11 and a gas outlet 12. The first port of the transmission channel 2 is connected to the ammonia inlet 11. The transmission channel 2 extends spirally from the first port toward the center of the body 1. The second port of the transmission channel 2 is connected to the inlet end of the ammonia decomposition reaction channel 3. The ammonia decomposition reaction channel 3 is coiled inside the body 1. The outlet end of the ammonia decomposition reaction channel 3 is connected to the exhaust inlet of the exhaust channel 4. The exhaust channel 4 extends spirally from the exhaust inlet toward the gas outlet 12. The exhaust outlet of the exhaust channel 4 is connected to the gas outlet 12. The ammonia decomposition reaction channel 3 is also connected to multiple heating devices 5. When the gas enters the transmission channel 2, it can flow along the extension direction of the transmission channel 2 and enter the ammonia decomposition reaction channel 3. When the gas enters the ammonia decomposition reaction channel 3, it can spirally flow along the extension direction of the ammonia decomposition reaction channel 3 toward the center of the body 1. When the gas reaches the center position near the body 1, it can be discharged from the ammonia decomposition reaction channel 3 and enter the exhaust channel 2, and then spirally flow along the extension direction of the exhaust channel 2 toward the exhaust outlet.

[0024] This coiled ammonia decomposition reactor uses a spiral arrangement of the ammonia decomposition reaction channel 3 inside the main body 1. The coiled transmission channel 2 and exhaust channel 4 are connected to the two ends of the ammonia decomposition reaction channel 3, respectively. This extends the flow distance and time of the ammonia gas, allowing it to be heated more completely and fully, and decompose into hydrogen and nitrogen. When multiple heating devices 5 heat the ammonia gas in the ammonia decomposition reaction channel 3, the spiral shape of the channel ensures stable and complete heat transfer, improving the heating effect and efficiency. This allows the ammonia to decompose more completely and quickly into a hydrogen and nitrogen mixture. Furthermore, the coiled ammonia decomposition reactor, with its coiled arrangement of the transmission channel, ammonia decomposition reaction channel, and exhaust channel, has a compact overall structure, making it suitable for ammonia decomposition applications in various scenarios.

[0025] like Figure 1 and Figure 2As shown, the body 1 of the coiled ammonia decomposition reactor of the present invention has a rectangular cross-sectional shape. An ammonia inlet 11 and a gas outlet 12 are vertically arranged on the body 1. Both the ammonia inlet 11 and the gas outlet 12 are located on the diagonal of the body 1. The ammonia inlet 11 is positioned near one vertex of the diagonal of the body 1, and the gas outlet 12 is positioned on the focal line of the body 1 relative to the other vertex of the ammonia inlet 11. The ammonia inlet 11 and the gas outlet 12 are located on the same diagonal of the body 1. Above the ammonia inlet 11 is... A gas guiding device 13 is provided above the gas outlet 12. The gas guiding device 13 located above the ammonia inlet 11 is connected to the ammonia storage device to collect and process the ammonia before introducing it more completely into the ammonia inlet 11. The gas guiding device 13 located on the gas outlet 12 is connected to the hydrogen storage device to collect and process the hydrogen-nitrogen mixed gas generated after the ammonia decomposition and then discharge it from the gas outlet 12. The first port of the transmission channel 2 is connected to the ammonia inlet 11. The transmission channel 2 is arranged along the inner wall of the body 1 and is curved inside the body 1. The transmission channel 2 includes a first transmission channel 21, a second transmission channel 22, and a third transmission channel 23 connected in sequence. One end of the first transmission channel 21 is connected to the ammonia inlet 11, and the other end of the first transmission channel 21 is connected to the second transmission channel 22. The first transmission channel 21 is fitted to one side of the body 1. Both ends of the second transmission channel 22 are curved structures, and the second transmission channel 22 is fitted to the side of the body 1. The extension direction of the second transmission channel 22 is perpendicular to the extension direction of the first transmission channel 21, which allows the ammonia to pass through more quickly. The flow transmission in the second transmission channel 22 improves the production efficiency of the coiled ammonia decomposition reaction device; the extension direction of the third transmission channel 23 is parallel to the extension direction of the first transmission channel 21, and the installation direction of the third transmission channel 23 is perpendicular to the installation direction of the second transmission channel 22. One end of the third transmission channel 23 relative to the second transmission channel 22 is a curved structure, and the curved end of the third transmission channel 23 is connected to the inlet end of the ammonia decomposition reaction channel 3, thereby enabling the introduced ammonia gas to be quickly introduced into the ammonia decomposition reaction channel 3 for ammonia decomposition reaction.

[0026] like Figure 2As shown, the ammonia decomposition reaction channel 3 is curved. The ammonia decomposition reaction channel 3 includes a first reaction channel 33 and a second reaction channel 34 connected sequentially. The first reaction channel 33 is curved, and the second reaction channel 34 is curved. The inlet end of the first reaction channel 33 is connected to the third transmission channel 23, and the outlet end of the first reaction channel 33 is connected to the second reaction channel 34. To maximize the flow distance and time of ammonia in the ammonia decomposition reaction channel 3, thereby promoting more complete thermal decomposition of ammonia and ensuring sufficient reaction to generate hydrogen and nitrogen, thus improving the ammonia decomposition efficiency, specifically, the first reaction channel... The first reaction channel 33 extends spirally toward the center of the body 1. One end of the first reaction channel 33 away from the third transmission channel 23 is located near the internal center of the body 1. More specifically, the installation direction of each part of the first reaction channel 33 is parallel to the extension direction of the adjacent edge of the body 1. When ammonia gas passes through the third transmission channel 23 and enters the first reaction channel 33, the ammonia gas can spirally flow inside the first reaction channel 33 along the extension direction of the first reaction channel 33 toward the center of the body 1; finally, it is discharged from the first reaction channel 33 and enters the second reaction channel 34.

[0027] To further increase the flow time and distance of ammonia gas within the second reaction channel 34, enabling the ammonia gas to undergo a decomposition reaction to generate hydrogen and nitrogen, specifically, the inlet end of the second reaction channel 34 is located near the center of the main body 1. The second reaction channel 34 extends spirally from its inlet end towards the gas outlet 12. The installation direction of each section of the second reaction channel 34 is parallel to the extension direction of the adjacent edge of the main body 1. The outlet end of the second reaction channel 34 is connected to the exhaust inlet of the exhaust channel 4. Preferably, to improve the decomposition effect of ammonia gas in the first reaction channel 33 and the second reaction channel 34, The extension direction of each part of the second reaction channel 34 is parallel to the extension direction of the corresponding part of the adjacent first reaction channel 33; this allows ammonia gas to flow uniformly and rapidly between the first reaction channel 33 and the second reaction channel 34, and also allows heat to be evenly distributed in the flowing ammonia gas, improving the integrity and uniformity of ammonia decomposition; wherein the first reaction channel 33 is provided with multiple curved channels, and the second reaction channel 34 is provided with multiple curved channels, the multiple curved channels can drive ammonia gas to flow rapidly in the first reaction channel 33 and the second reaction channel 34, and also extend the flow distance of ammonia gas, so that ammonia gas can undergo a more complete decomposition reaction, improving the ammonia decomposition efficiency of the coiled ammonia decomposition reactor.

[0028] To improve the decomposition efficiency of ammonia within the ammonia decomposition reaction channel 3 and promote its rapid and complete decomposition into hydrogen and nitrogen, specifically, the first reaction channel 33 is filled with a ruthenium-based catalyst or a nickel-based catalyst, and the second reaction channel 34 is filled with a ruthenium-based catalyst or a nickel-based catalyst. When ammonia enters the first reaction channel 33 and the second reaction channel 34, it can fully contact the ruthenium-based catalyst or the nickel-based catalyst therein. Under the action of the ruthenium-based catalyst or the nickel-based catalyst, the ammonia can undergo a decomposition reaction more quickly, generating a mixed gas containing hydrogen and nitrogen. Simultaneously, to further improve the decomposition effect of ammonia in the ammonia decomposition reaction channel 3, ensuring complete and sufficient decomposition into hydrogen and nitrogen, preferably, the length ratio of the transport channel 2 to the ammonia decomposition reaction channel 3 is in the range of 1:3 to 1:5, and the length ratio of the first reaction channel 33 to the second reaction channel 34 is in the range of 1:1 to 1:1.5; this extends the flow distance of the ammonia, allowing it to react more fully with the catalyst to generate hydrogen and nitrogen.

[0029] To increase the heating temperature of ammonia gas and thus improve its decomposition efficiency, more specifically, a gap exists between the spirally arranged first reaction channel 33 and the spirally arranged second reaction channel 34. The gaps between each part of the first reaction channel 33 and each part of the second reaction channel 34 are equal in size. Multiple heating devices 5 are arranged in the gaps between the first reaction channel 33 and the second reaction channel 34 to better improve the reaction efficiency of ammonia decomposition, ensuring uniform heating and decomposition of ammonia gas, and providing more heat to the ammonia gas in the ammonia decomposition reaction channel 3, thereby improving the overall heating effect. Preferably, the heating devices 5 are fixedly connected to the outer walls of both the first reaction channel 33 and the second reaction channel 34, allowing multiple heating devices 5 to simultaneously heat the ammonia gas in both channels, promoting faster heating and reaching the temperature required for ammonia decomposition, thus improving the decomposition efficiency. The heating devices 5 are electric heating devices, such as electric heating plates.

[0030] To further increase the flow time of ammonia in the ammonia decomposition reaction channel 3, and to promote more effective multi-angle heating of ammonia by the multiple heating devices, preferably, the installation angle between two adjacent parts of the first reaction channel 33 is 80-100°, for example, 90°, and the installation angle between two adjacent parts of the second reaction channel 34 is 80-100°, for example, 90°. By setting the first reaction channel 33 and the second reaction channel 34 with curved shapes, the flow distance of ammonia in the ammonia decomposition reaction channel 3 can be increased more effectively, so that ammonia can undergo decomposition reaction more fully under the action of the catalyst to generate hydrogen and nitrogen. More preferably, in order to further achieve uniform heating of ammonia and uniform heat distribution in ammonia, the angle between two adjacent parts of the first reaction channel 33 and the angle between two adjacent parts of the second reaction channel 34 are equal to each other. This allows ammonia to be more evenly distributed in the first reaction channel 33 and the second reaction channel 34, and to undergo uniform decomposition reaction under the combined action of the catalyst and the heating device 5 to generate a hydrogen-nitrogen mixed gas.

[0031] The exhaust channel 4 has a curved structure and includes a first exhaust section 41 and a second exhaust section 42 connected in sequence. The first exhaust section 41 is fitted to the side of the main body 1, and both ends of the first exhaust section 41 are curved, allowing the decomposed hydrogen-nitrogen mixture to be quickly discharged through the exhaust channel 4, thereby accelerating the gas flow rate in the main body 1. The installation direction of the second exhaust section 42 of the exhaust channel 4 is perpendicular to the extension direction of the first exhaust section 41. This is to more effectively utilize the heat of the gas after ammonia decomposition, improve the energy utilization rate of the device, reduce the energy consumption of the heating device 5, and promote the ammonia decomposition reaction. Preferably, the second exhaust section 42... The second exhaust portion 42 is fitted into the third transmission channel 23 of the transmission channel 2. The second exhaust portion 42 is fixedly connected to the outer wall of the third transmission channel 23. The heat of the mixed gas in the second exhaust portion 42 can be transferred to the ammonia in the third transmission channel 23 during the gas flow process, so that the ammonia can reach the temperature required for ammonia decomposition more quickly, reducing the energy consumption of the subsequent heating device 5. This also effectively utilizes the energy generated during the ammonia decomposition reaction, improving the overall energy utilization rate of the device. Furthermore, it ensures that the ammonia enters the first reaction channel 33 and comes into contact with the catalyst at a higher temperature, thus reducing the amount of catalyst required to achieve the same conversion rate.

[0032] When ammonia gas enters the main body 1 through the ammonia inlet 11, it then enters the transmission channel 2. The ammonia gas flows along the extension direction of the transmission channel 2, passing sequentially through the first transmission channel 21, the second transmission channel 22, and the third transmission channel 23 before entering the first reaction channel 33 of the ammonia decomposition reaction channel 3. Upon entering the first reaction channel 33, the ammonia gas undergoes a decomposition reaction under the action of the catalyst, generating a mixed gas containing hydrogen and nitrogen. This decomposed mixed gas flows spirally along the extension direction of the first reaction channel 33 towards the center of the main body 1. Under the combined action of the catalyst in the first reaction channel 33 and the multiple heating devices 5 located on the ammonia decomposition channel 3, the ammonia gas undergoes a decomposition reaction during the spiral flow, generating hydrogen and nitrogen. After preliminary decomposition, the ammonia gas exits from the first reaction channel 33 and immediately flows into the connected second reaction channel 34. The remaining ammonia... The gas flows spirally along the second reaction channel 34 towards the gas outlet 12. The remaining ammonia gas undergoes further decomposition under the action of the catalyst in the second reaction channel 34 and the multiple heating devices 5 between the second reaction channel 34 and the first reaction channel 33, generating a mixed gas of hydrogen and nitrogen. After the mixed gas is discharged from the second reaction channel 34, it is introduced into the exhaust channel 4 connected to the second reaction channel 34. It then sequentially enters the first exhaust section 41 and the second exhaust section 42 of the exhaust channel 4. When the mixed gas enters the second exhaust section 42, the heat of the mixed gas itself is transferred to the ammonia gas in the third transmission section 23 of the transmission channel 2, thereby reducing the temperature of the mixed gas itself and increasing the temperature of the ammonia gas in the third transmission section 23, promoting the subsequent ammonia gas to reach the temperature required for ammonia decomposition more quickly, achieving the effect of preheating the ammonia gas. The completely reacted mixed gas is discharged through the gas outlet 12 connected to the second exhaust section 42.

[0033] The present invention also discloses an ammonia decomposition reaction system including the above-mentioned coiled ammonia decomposition reaction device, further comprising an ammonia storage device, an adsorption device, and a hydrogen storage device. The ammonia storage device is connected to the ammonia inlet 11 on the main body 1 and is used to introduce ammonia into the transmission channel 2 of the main body 1. The adsorption device is connected to the gas outlet 12 on the main body 1 and is used to further adsorb ammonia in the mixed gas to improve the hydrogen purity in the mixed gas. The hydrogen storage device is connected to the adsorption device and is used to store the gas after adsorption by the adsorption device.

[0034] 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 scope of protection of this invention.

Claims

1. A coiled ammonia decomposition reaction device, comprising a main body, a transmission channel, an ammonia decomposition reaction channel, and an exhaust channel, characterized in that: The cross-sectional shape of the main body is rectangular; the main body is provided with an ammonia inlet and a gas outlet; the first port of the transmission channel is connected to the ammonia inlet; the transmission channel extends spirally from the first port toward the center of the main body; the second port of the transmission channel is connected to the inlet end of the ammonia decomposition reaction channel; the ammonia decomposition reaction channel is coiled inside the main body. The ammonia decomposition reaction channel includes a first reaction channel and a second reaction channel connected in sequence. The inlet end of the first reaction channel is connected to the transmission channel. The first reaction channel extends spirally from its inlet end toward the center of the main body. The outlet end of the first reaction channel is connected to the inlet end of the second reaction channel. The installation direction of each part of the first reaction channel is parallel to the extension direction of the adjacent edge of the main body. The second reaction channel extends spirally from its inlet end toward the gas outlet, and its outlet end is connected to the exhaust channel. The ratio between the length of the first reaction channel and the length of the second reaction channel is 1:1.

5. The installation direction of each part of the second reaction channel is parallel to the extension direction of the adjacent side of the body. A gap exists between the first reaction channel and the second reaction channel, and multiple heating devices are disposed in the gap between the first reaction channel and the second reaction channel; the heating devices are electric heating devices. The outlet end of the ammonia decomposition reaction channel is connected to the exhaust inlet of the exhaust channel. The exhaust channel extends spirally from the exhaust inlet toward the direction close to the gas outlet. The exhaust outlet of the exhaust channel is connected to the gas outlet. When the gas enters the transmission channel, it can flow along the extension direction of the transmission channel and enter the ammonia decomposition reaction channel; when the gas enters the ammonia decomposition reaction channel, it can spirally flow along the extension direction of the ammonia decomposition reaction channel toward the center of the main body; when the gas reaches the center position near the main body, it can be discharged from the ammonia decomposition reaction channel and enter the exhaust channel, and then spirally flow along the extension direction of the exhaust channel toward the exhaust outlet.

2. The coiled ammonia decomposition reaction apparatus according to claim 1, characterized in that: The transmission channel includes a first transmission channel, a second transmission channel, and a third transmission channel connected in sequence. One end of the first transmission channel relative to the second transmission channel is connected to the ammonia inlet. Both ends of the second transmission channel are curved structures. The third transmission channel is curved at one end relative to the second transmission channel.

3. The coiled ammonia decomposition reaction apparatus according to claim 1, characterized in that: The ammonia decomposition reaction channel is equipped with a ruthenium-based catalyst or a nickel-based catalyst.

4. The coiled ammonia decomposition reaction apparatus according to claim 1, characterized in that: The ratio between the length of the transmission channel and the length of the ammonia decomposition reaction channel is in the range of 1:3 to 1:

5.

5. The coiled ammonia decomposition reaction apparatus according to claim 1, characterized in that: The exhaust channel and the transmission channel are at least partially fitted together.

6. An ammonia decomposition reaction system comprising the coiled ammonia decomposition reaction apparatus according to any one of claims 1 to 5, characterized in that: Also includes An ammonia storage device, wherein the ammonia storage device is connected to the ammonia inlet of the main body; An adsorption device is connected to the gas outlet of the main body, and the adsorption device is used to adsorb ammonia gas in the mixed gas discharged from the gas outlet; A hydrogen storage device, which is connected to the adsorption device, is used to store the gas after it has been adsorbed by the adsorption device.

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