An ammonia decomposition reactor and system containing multiple sets of induction coils
By employing a multi-set induction coil design and electromagnetic induction heating in the ammonia decomposition reactor, extending the ammonia flow distance, and filling with catalyst, the problems of low ammonia decomposition efficiency and large volume were solved, achieving efficient and compact ammonia decomposition.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- FUZHOU UNIV
- Filing Date
- 2023-11-09
- Publication Date
- 2026-06-12
AI Technical Summary
Existing ammonia decomposition reactors suffer from low ammonia decomposition efficiency, large reactor volume, and high requirements for temperature and catalyst.
The ammonia decomposition reactor is designed with multiple sets of induction coils. By winding induction coils around the outer walls of the first and second bodies and setting channels inside, electromagnetic induction heating is used to extend the flow distance of ammonia gas and improve heating efficiency. The channels are filled with catalysts to promote ammonia decomposition.
It improves the decomposition efficiency of ammonia, reduces the amount of catalyst and reactor volume, lowers energy consumption, and enhances heating efficiency and decomposition effect.
Smart Images
Figure CN117380099B_ABST
Abstract
Description
Technical Field
[0001] This invention relates to the field of clean energy equipment technology, specifically to an ammonia decomposition reactor and system containing multiple sets of induction coils. Background Technology
[0002] Ammonia is not only an important inorganic chemical product, but it also has unique advantages as a hydrogen carrier. Ammonia is easily liquefied, has a pungent odor, is non-flammable and non-toxic at low concentrations, has high hydrogen storage density, and its production, storage, and transportation technologies are mature. Furthermore, hydrogen production is carbon-free, making it a highly efficient, clean, and safe hydrogen carrier. Producing hydrogen by decomposing ammonia is also a feasible and effective hydrogen production technology. Current technologies typically use ammonia decomposition reactors to decompose ammonia and produce hydrogen and nitrogen. During the ammonia decomposition reaction, high-temperature heating of the ammonia is usually required to provide the necessary heat to promote its thermal decomposition. However, existing ammonia decomposition reactors typically use heating resistance wires or heating resistors to provide heat for ammonia decomposition through thermal radiation. Moreover, existing ammonia decomposition reactors are usually large in size, heavily reliant on ammonia decomposition catalysts, and have low decomposition and heating efficiency during the ammonia decomposition process.
[0003] Chinese patent CN116651333A discloses an ammonia-hydrogen fuel preparation device and method, including a reactor, a catalyst, a heat pipe, a metal coil, and a power source. The catalyst is located inside the reactor body, the heat pipe passes through the reactor body and heats the reactor body, and the power source generates a magnetic field around the reactor body after supplying power to the metal coil. Using ammonia as raw material, the ammonia is heated and decomposed to produce hydrogen under the combined action of the heat pipe, the metal coil, and the catalyst, which improves the heating effect of ammonia. However, this ammonia-hydrogen fuel preparation device still has high requirements for the volume of the reactor body and requires external heat pipes for auxiliary heating. The overall energy consumption of the ammonia decomposition process is large and the decomposition efficiency is not high. Summary of the Invention
[0004] To address the shortcomings of existing ammonia decomposition reaction equipment, such as low ammonia decomposition efficiency, large reactor volume, and high requirements for temperature and catalyst, this paper provides an ammonia decomposition reactor and system with high ammonia decomposition efficiency and compact size, containing multiple sets of induction coils.
[0005] The technical solution adopted by this invention to solve its technical problem is as follows: an ammonia decomposition reactor containing multiple sets of induction coils, comprising a first body and a second body. The first body is provided with an ammonia inlet and a first pair of interfaces. A first induction coil is wound around the outer wall of the first body. A first channel is provided in the first body, one end of which is connected to the ammonia inlet, and the other end of which is connected to the first pair of interfaces. The first induction coil is electrically connected to an AC power source. The first body is made of a metal material. The second body is provided with a second pair of interfaces and a mixed gas outlet. A second induction coil is wound around the outer wall of the second body. A second channel is provided in the second body, one end of which is connected to the second pair of interfaces, and the other end of which is connected to the mixed gas outlet. The second induction coil is electrically connected to an AC power source. The second body is also made of a metal material. The first body and the second body are arranged side by side with a gap between them. The first pair of interfaces and the second pair of interfaces are connected to each other. The sum of the lengths of the first channel and the second channel is greater than the sum of the lengths of the first body and the second body.
[0006] Furthermore, the first channel includes a first pipe and a second pipe that are interconnected, both of which are located inside the first body. The second pipe is fitted outside the first pipe. The first pipe is also connected to an ammonia inlet, and the second pipe is also connected to a first interface. The second channel includes a first flow channel and a second flow channel that are interconnected, both of which are located inside the second body. The second flow channel is fitted outside the first flow channel. The first pipe is also connected to a mixed gas outlet, and the second pipe is also connected to a second interface.
[0007] Furthermore, the length of the first pipe is greater than the length of the second pipe, and the length of the second pipe is greater than the length of the first body; the length of the first flow channel is greater than the length of the second flow channel, and the length of the second flow channel is greater than the length of the second body.
[0008] Furthermore, the second flow channel is provided with multiple partition plates, and the partition plates are provided with multiple through holes.
[0009] Furthermore, in the second flow channel, the portion between two adjacent partition plates is filled with catalyst.
[0010] Furthermore, a first insulation layer is filled between the first body and the first channel, the thermal conductivity of the first insulation layer is less than 0.05 W / (mK), and an aerogel layer is covered on the first insulation layer; a second insulation layer is filled between the second body and the second channel, the thermal conductivity of the second insulation layer is less than 0.03 W / (mK), and an aerogel layer is covered on the second insulation layer.
[0011] Furthermore, the first induction coil and the second induction coil are electrically connected to each other.
[0012] Furthermore, the number of turns in the first induction coil is less than the number of turns in the second induction coil.
[0013] Furthermore, the minimum straight-line distance between the first body and the second body is greater than or equal to 30 centimeters.
[0014] This application also discloses an ammonia decomposition reaction system including the above-mentioned ammonia decomposition reactor containing multiple sets of induction coils, further comprising:
[0015] An ammonia supply system is connected to the ammonia inlet and is used to introduce ammonia into the first channel of the first body.
[0016] The purification system is connected to the mixed gas outlet and is used to remove residual ammonia from the decomposed hydrogen-nitrogen mixture discharged from the mixed gas outlet.
[0017] A mixed gas collection device is connected to a purification system and is used to collect hydrogen-nitrogen mixed gas after purification by the purification system.
[0018] The ammonia decomposition reactor of the present invention contains multiple sets of induction coils. The reactor comprises two bodies with induction coils wound around their outer surfaces arranged side-by-side. A first channel and a second channel are respectively provided within a first body and a second body. The sum of the lengths of the first and second channels is greater than the sum of the lengths of the first and second bodies, extending the flow distance of the ammonia gas. This allows the ammonia gas to be heated more fully and preheated before decomposition, enabling ammonia to undergo a more complete decomposition reaction under the action of the catalyst. Similarly, the first and second bodies are heated by electromagnetic induction, which is more efficient than traditional electric or gas heating. In the electromagnetic induction environment, the first and second bodies heat up faster than with traditional electric or gas heating, resulting in more complete ammonia decomposition. This reduces the residual ammonia content in the mixed gas and also reduces the required amount of ammonia decomposition catalyst and the volume of either the first or second body. 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 1 This is a schematic diagram of the ammonia decomposition reactor containing multiple sets of induction coils according to the present invention.
[0021] Figure 2This is a schematic diagram of the first body of the ammonia decomposition reactor containing multiple sets of induction coils according to the present invention.
[0022] Figure 3 This is a schematic diagram of the structure of the second body of the ammonia decomposition reactor containing multiple sets of induction coils according to the present invention.
[0023] Figure 4 This is a schematic diagram of another ammonia decomposition reactor containing multiple sets of induction coils according to the present invention. Detailed Implementation
[0024] 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.
[0025] like Figure 1 As shown, the ammonia decomposition reactor containing multiple sets of induction coils according to the present invention includes a first body 1 and a second body 2.
[0026] The first body 1 is provided with an ammonia inlet 10 and a first pair of interfaces 11. A first induction coil 12 is wound around the outer wall of the first body 1. A first channel 13 is provided in the first body 1. One end of the first channel 13 is connected to the ammonia inlet 10, and the other end of the first channel 13 is connected to the first pair of interfaces 11. The first induction coil 12 is electrically connected to an AC power supply. The first body 1 is made of metal.
[0027] The second body 2 is provided with a second pair of interfaces 20 and a mixed gas outlet 21. A second induction coil 22 is wound around the outer wall of the second body 2. A second channel 23 is provided in the second body 2. One end of the second channel 23 is connected to the second pair of interfaces 20, and the other end of the second channel 23 is connected to the mixed gas outlet 21. The second induction coil 22 is electrically connected to an AC power source. The second body 2 is made of metal.
[0028] The first body 1 and the second body 2 are arranged side by side, with a gap between them. The first pair of interfaces 11 and the second pair of interfaces 20 are connected to each other. The sum of the lengths of the first channel 13 and the second channel 23 is greater than the sum of the lengths of the first body 1 and the second body 2.
[0029] The ammonia decomposition reactor of the present invention contains multiple sets of induction coils. By arranging the bodies with induction coils wound around their outer surfaces side by side, and by setting a first channel and a second channel in the first body and the second body respectively, wherein the sum of the lengths of the first channel and the second channel is greater than the sum of the lengths of the first body and the second body, the flow distance of ammonia gas is extended, so that ammonia gas can be heated more fully. Similarly, the first body and the second body are heated by electromagnetic induction, which can quickly carry out the heating reaction, with higher heating efficiency and more complete ammonia decomposition. This reduces the content of residual ammonia gas in the mixed gas and also reduces the requirements for the amount and performance of ammonia decomposition catalyst.
[0030] like Figure 2As shown, the first body 1 is a cylindrical structure, and the material of the first body 1 is a metallic material, such as austenitic chromium-nickel stainless steel. An ammonia inlet 10 is located at one end of the first body 1, and the ammonia inlet 10 is used to introduce ammonia into the interior of the first body 1. The first channel 13 is located inside the first body 1, and the first channel 13 includes a first pipe 131 and a second pipe 132 that are interconnected. The first pipe 131 and the second pipe 132 are located inside the first body 1. The first pipe 131 extends towards the ammonia inlet 10, and one end of the first pipe 131 is connected to the ammonia inlet 10, while the other end of the first pipe 131... The first pipe 131 is installed in a direction parallel to the extension direction of the first channel 13, and is connected to the second pipe 132. To further improve the heating effect of ammonia gas by allowing heat transfer between the ammonia gases during heating, the second pipe 132 is sleeved around the first pipe 131, with its installation direction parallel to the extension direction of the first pipe 131. The other end of the second pipe 132 is connected to the first interface 11. Therefore, the heat from the heated ammonia gas in the second pipe 132 can be transferred to the ammonia gas entering through the ammonia inlet 10 in the first pipe 131, which helps to improve the heating effect of the first pipe 131. The heat of ammonia in 131 is used to improve the preheating effect of ammonia and also improve the heat utilization rate in the pipeline; the first induction coil 12 is wound around the outer wall of the first body 1, and the AC power supply electrically connected to the first induction coil 12 is a three-phase AC power with a frequency range of 10-30kHz; when the first induction coil 12 is electrically connected to the external power supply, since the first induction coil 12 is spirally wound around the first body 1, the current can flow along the extension direction of the first induction coil 12, and a constantly changing alternating magnetic field is generated in the first induction coil 12; since the first induction coil 12 is arranged around the first body 1, and the first body 1 is made of metal material. When a constantly changing alternating magnetic field is generated in the first induction coil 12, alternating magnetic field lines are generated on the surface of the first body 1. Because the first body 1 is made of metal, an alternating current is generated on the first body 1. The alternating current causes the charge carriers generated on the first body 1 to move at high speed and randomly. The charge carriers on the first body 1 collide and rub against each other, generating heat, which in turn rapidly heats the ammonia gas in the first channel 13, achieving a preheating effect on the ammonia gas. In order to reduce heat loss during the heating process, a first insulation layer 14 is filled between the first body 1 and the first channel 13. The first insulation layer 14 can withstand a temperature of 1000℃ and has a thermal conductivity of less than 0.0.5W / (mK), the first insulation layer 14 is a ceramic material, such as aluminum silicate; preferably, the insulation layer surrounds and covers the surface of the first channel 13, so that the ammonia gas can be fully heated when flowing in the first channel 13, reducing the possibility of heat loss during the ammonia gas flow process; the heated ammonia gas is discharged through the first interface 11; further, in order to enable the ammonia gas to be more fully heated and decomposed, the length of the first pipe 131 is greater than the length of the second pipe 132, and the length of the second pipe 132 is greater than the length of the first body 1. When the ammonia gas enters the first pipe 131 through the ammonia gas inlet 10, it enters the first interface 11 through the second pipe 132 and is discharged from the first body 1. Since the lengths of the first pipe 131 and the second pipe 132 are both greater than the length of the first body 1, the flow distance of the ammonia gas in the first channel 13 is longer than the straight distance through the first body 1. Therefore, when the first induction coil 12 is energized by an external power source, the ammonia gas flow distance is extended. The flow distance allows ammonia gas to be fully heated in the first channel 13, increasing its temperature. Furthermore, since the second pipe 132 is fitted outside the first pipe 131, the first channel 13 can be compactly integrated into the first body 1, improving the overall compactness of the first body 1 and making it suitable for various application scenarios. More preferably, the outer wall of the first insulation layer 14 is covered with an aerogel layer to further reduce the thermal conductivity of the first insulation layer 14 and improve its insulation effect. By connecting the first induction coil 12 to an AC power source and heating the first body 1 through electromagnetic induction, compared to traditional electric or gas heating, the first induction coil 12 connected to AC power can quickly heat the first body 1, improving the heating effect of the ammonia gas. Since the lengths of both the first pipe 131 and the second pipe 132 are greater than the length of the first body 1, the ammonia gas can be more fully preheated in the first body 1, improving the subsequent ammonia decomposition effect.
[0031] like Figure 3As shown, the second body 2 has a cylindrical structure and is made of a metallic material, such as austenitic chromium-nickel stainless steel. The mixed gas outlet 21 of the second body 2 is located at one end of the second body, and is used to discharge the hydrogen-nitrogen mixed gas produced by the decomposition of ammonia into the second body 2. The second channel 23 is located inside the second body 2 and includes a first flow channel 231 and a second flow channel 232 that are interconnected. Both the first flow channel 231 and the second flow channel 232 are located inside the second body 2. The first flow channel 231 extends towards the mixed gas outlet 21, and one end of the first flow channel 231 connects to the mixed gas outlet 21. The outlet 21 is connected, and the other end of the first flow channel 231 is connected to the second flow channel 232. The installation direction of the first flow channel 231 is parallel to the extension direction of the second channel 23. The second flow channel 232 is fitted outside the first flow channel 231, and the installation direction of the second flow channel 232 is parallel to the extension direction of the first flow channel 231. The other end of the second flow channel 232 is connected to the second interface 20. Similarly, by fitting the second flow channel 232 outside the first flow channel 231, the gas inside the second flow channel 232 can exchange heat with the gas inside the first flow channel 231, which better promotes the decomposition reaction of ammonia and reduces the residual ammonia in the mixed gas. Specifically, the second flow channel 232 is provided with multiple partition plates 233. One partition plate 233 is provided at the end near the second interface 20, and another partition plate 233 is provided at the end near the inlet of the first flow channel 231. Multiple through holes 2330 are provided on the partition plates 233. To better improve the decomposition efficiency of ammonia, the portion between two adjacent partition plates of the second flow channel 232 is filled with a catalyst, such as a ruthenium-based catalyst or a nickel-based catalyst. When ammonia enters the second flow channel 232, under the action of the ammonia decomposition catalyst in the second flow channel 232, the ammonia can be heated to generate a mixed gas of hydrogen and nitrogen more quickly and completely, improving the decomposition efficiency of ammonia. Multiple partition plates 233 are provided in the second flow channel 232 to fix the ammonia decomposition catalyst in the second flow channel 232, reducing the risk of the catalyst being blown out of the second flow channel 232 with the gas during the reaction, so as to control the amount of catalyst according to the actual reaction needs, improve the overall decomposition efficiency of ammonia and achieve effective control of production costs; the preheated ammonia gas introduced from the second pair of interfaces 20 enters the second flow channel 232 through multiple through holes 2330 on the partition plate 233 near the second pair of interfaces 20; then it exits the second flow channel 232 through multiple through holes 2330 on the partition plate 233 near the inlet of the first flow channel 231 and enters the connected first flow channel 231;The second induction coil 22 is wound around the outer wall of the second body 2. The external power supply electrically connected to the second induction coil 22 is three-phase alternating current with a frequency range of 10–30 kHz. When the second induction coil 22 is electrically connected to the external power supply, current can flow along the extension direction of the second induction coil 22 due to its spiral winding around the second body 2, generating a continuously changing alternating magnetic field within the second induction coil 22. Because the second induction coil 22 surrounds the second body 2 and the second body 2 is made of metal, a continuously changing alternating magnetic field is generated within the second induction coil 22. At that time, alternating magnetic field lines are generated on the surface of the second body 2. Because the second body 2 is made of metal, an alternating current is generated on the second body 2. The alternating current causes the charge carriers generated on the second body 2 to move at high speed and randomly. The charge carriers on the second body 2 collide and rub against each other, generating heat, which in turn heats the ammonia gas located in the second channel 23, promoting the thermal decomposition of ammonia gas and generating hydrogen and nitrogen gas. In order to reduce the heat loss during the heating process of ammonia gas and improve the heating effect of ammonia gas, preferably, a second heat insulation layer 24 is filled between the second body 2 and the second channel 23. The second heat insulation layer 24 can withstand a temperature of 1000℃. The thermal conductivity of 4 is less than 0.03 W / (mK), for example, aluminum silicate; the insulation layer 24 surrounds and covers the surface of the second channel 23, so that the ammonia gas can be fully heated without heat loss when flowing in the second channel 23; further, in order to further extend the flow distance of the ammonia gas, so that the ammonia gas can be more fully heated and decomposed when flowing in the second channel 232, the length of the first flow channel 231 is greater than the length of the second flow channel 232, and the length of the second flow channel 232 is greater than the length of the second body 2. When the ammonia gas, which has been preheated by the first body 1, enters the second flow channel 232 from the second pair of interfaces 20 connected to the first pair of interfaces 11, due to the The lengths of the first flow channel 231 and the second flow channel 232 are both greater than the length of the second body 2. Therefore, the flow distance of ammonia in the second channel 23 is longer than the flow distance in the second body 2. Thus, when the second induction coil 22 is powered by an external power source, the ammonia flow distance is extended so that the ammonia can be fully heated in the second channel 23. Under the combined action of the catalyst, a mixed gas containing hydrogen and nitrogen is generated. The generated mixed gas containing hydrogen and nitrogen is discharged from the second flow channel 232 and enters the first flow channel 231. It is then discharged from the mixed gas outlet 21 through the first flow channel 231 into the second body 2, thus completing the heating and decomposition of ammonia.Similarly, since the second induction coil 12 is connected to an AC power source, heating the second body 2 via electromagnetic induction, compared to traditional electric heating or gas heating, allows for rapid heating of the second body 2 after the second induction coil 22 is connected to the AC power source, improving the heating effect of ammonia. Because the lengths of both the first flow channel 231 and the second flow channel 232 are greater than the length of the second body 2, the ammonia can be more fully decomposed by heat within the second body 2. More preferably, the outer wall of the second insulation layer 24 is covered with an aerogel layer to further reduce the thermal conductivity of the second insulation layer 24 and improve its insulation effect.
[0032] Similarly, since the first body 1 and the second body 2 are arranged side by side, when the first induction coil 12 and the second induction coil 22 are respectively connected to AC power, the magnetic fields generated in the first body 1 and the second body 2 can be superimposed, thereby mutually strengthening the magnetic fields in the second body 2 and the first body 1, and improving the heating effect in the second body 2 and the first body 1; that is, when both the first induction coil 12 and the second induction coil 22 are energized, the temperature of the first body 1 located in the first induction coil 12 can be further increased, and the temperature of the second body 2 located in the second induction coil 22 can be further increased, thus further improving the heating effect of ammonia in the first body 1 and the second body 2.
[0033] like Figure 4As shown, to more conveniently control the current generation in the first induction coil 12 on the first body 1 and the second induction coil 22 on the second body 2, and to control the corresponding temperatures in the first body 1 and the second body 2, thereby better heating the ammonia in the first body 1 and the second body 2; preferably, the first induction coil 12 and the second induction coil 22 are electrically connected to each other, and the first induction coil 12 and the second induction coil 22 are simultaneously connected to the same AC power source. By controlling the external power source, the first induction coil 12 and the second induction coil 22 can be controlled simultaneously. Since the first induction coil 12 and the second induction coil 22 are electrically connected to each other, when the first induction coil 12 and the second induction coil 22 are energized, the current intensity in the first induction coil 12 and the second induction coil 22 is equal to that in the second induction coil 22. Therefore, the heating effect on the first body 1 and the second body 2 is only related to the number and density of the windings of their respective induction coils. The heating effect of ammonia in the first body 1 and the second body 2 can be adjusted by changing the number of turns and the density of the winding of the induction coils on the first body 1 or the second body 2, respectively. When the number of turns of the first induction coil 12 and the second induction coil 22 are equal, the heat generated in the first induction coil 12 and the heat generated in the second induction coil 22 are equal. The first body 1 and the second body 2 can be simultaneously controlled by an external power source for synchronous heating, which improves the working efficiency and control effect of the first body 1 and the second body 2. In order to more fully promote the decomposition of ammonia and reduce the residual ammonia in the mixed gas, preferably, the number of turns of the first induction coil 12 on the first body 1 is less than the number of turns of the second induction coil 22 on the second body 2, so that the ammonia can be fully preheated in the first body 1, which is beneficial to the decomposition reaction of ammonia in the second body 2 and the energy distribution of the entire reactor.
[0034] On the other hand, in order to improve the control of the first body 1 and the second body 2, so that the heating temperature of the first body 1 and the second body 2 can be independently controlled, the temperature in the first body 1 and the second body 2 can be adjusted according to the actual ammonia heating situation, and the heating of ammonia in the first body 1 and the second body 2 can be precisely controlled; preferably, the minimum straight-line distance between the first body 1 and the second body 2 is greater than or equal to 30 cm; when the minimum straight-line distance between the first body 1 and the second body 2 is greater than or equal to 30 cm, the magnetic field generated when the first body 1 is energized and the magnetic field generated when the second body 2 is energized will not be superimposed. Therefore, when the first body 1 is energized, the magnetic field formed inside it will not be superimposed by the second body 2, and when the second body 2 is energized, the magnetic field formed inside it will not be superimposed by the first body 1. By controlling the energizing power of the first induction coil 12 on the first body 1 or the energizing power of the second induction coil 22 on the second body 2, the heating of ammonia in the first body 1 and the second body 2 can be controlled respectively, so that the heating of the first body 1 and the second body 2 can be adjusted separately according to the actual situation.
[0035] This application also discloses an ammonia decomposition reaction system including the ammonia decomposition reactor containing multiple sets of induction coils, further comprising:
[0036] An ammonia supply system, which is connected to the ammonia inlet, is used to introduce ammonia into the first channel of the first body;
[0037] A purification system, which is connected to the outlet of the mixed gas, is used to remove residual ammonia from the decomposed hydrogen-nitrogen mixture discharged from the outlet of the mixed gas.
[0038] A mixed gas collection device is connected to the purification system and is used to collect hydrogen-nitrogen mixed gas purified by the purification system.
[0039] 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. An ammonia decomposition reactor containing multiple sets of induction coils, comprising a first body and a second body, characterized in that: The first body is provided with an ammonia inlet and a first pair of interfaces. A first induction coil is wound around the outer wall of the first body. A first channel is provided in the first body. The first induction coil is electrically connected to an AC power source. The first body is made of a metal material. The first body is made of austenitic chromium-nickel stainless steel. The first channel includes a first pipe and a second pipe that are interconnected. Both the first pipe and the second pipe are located inside the first body. The second pipe is sleeved outside the first pipe. The first pipe is also connected to the ammonia inlet, and the second pipe is also connected to the first connector. The length of the first pipe is greater than the length of the second pipe, and the length of the second pipe is greater than the length of the first body. A first insulation layer is filled between the first body and the first channel. The thermal conductivity of the first insulation layer is less than 0.05 W / (mK). An aerogel layer is covered on the first insulation layer. The second body is provided with a second pair of interfaces and a mixed gas outlet. A second induction coil is wound around the outer wall of the second body. A second channel is provided in the second body. The second induction coil is electrically connected to an AC power source. The second body is made of metal material. The second body is made of austenitic chromium-nickel stainless steel. The second channel includes a first flow channel and a second flow channel that are interconnected. Both the first flow channel and the second flow channel are located inside the second body. The second flow channel is sleeved outside the first flow channel. The first pipe is also connected to the mixed gas outlet, and the second pipe is also connected to the second interface. The length of the first flow channel is greater than the length of the second flow channel, and the length of the second flow channel is greater than the length of the second body; A second insulation layer is filled between the second body and the second channel. The thermal conductivity of the second insulation layer is less than 0.03 W / (mK). An aerogel layer is covered on the second insulation layer. The first body and the second body are arranged side by side with a gap between them. The first pair of interfaces and the second pair of interfaces are connected to each other. The sum of the lengths of the first channel and the second channel is greater than the sum of the lengths of the first body and the second body. The first induction coil and the second induction coil are electrically connected to each other.
2. An ammonia decomposition reactor containing multiple sets of induction coils according to claim 1, characterized in that: The second flow channel is provided with multiple partition plates, and the partition plates are provided with multiple through holes.
3. An ammonia decomposition reactor containing multiple sets of induction coils according to claim 2, characterized in that: In the second flow channel, the portion between two adjacent partition plates is filled with an ammonia decomposition catalyst.
4. An ammonia decomposition reactor containing multiple sets of induction coils according to claim 1, characterized in that: The number of turns of the first induction coil is less than the number of turns of the second induction coil.
5. An ammonia decomposition reactor containing multiple sets of induction coils according to claim 1, characterized in that: The minimum straight-line distance between the first body and the second body is greater than or equal to 30 centimeters.
6. An ammonia decomposition reaction system comprising an ammonia decomposition reactor containing multiple sets of induction coils as described in any one of claims 1 to 5, characterized in that: Also includes An ammonia supply system, which is connected to the ammonia inlet, is used to introduce ammonia into the first channel of the first body; A purification system, which is connected to the outlet of the mixed gas, is used to remove residual ammonia from the decomposed hydrogen-nitrogen mixture discharged from the outlet of the mixed gas. A mixed gas collection device is connected to the purification system and is used to collect hydrogen-nitrogen mixed gas purified by the purification system.