Ammonia decomposition reaction device and system with spiral structure

Abstract

The application discloses a kind of ammonia decomposition reaction devices with spiral structure, including main body, first pipeline, second pipeline, third pipeline, fourth pipeline, baffle and multiple gas passages, first pipeline is along the extension direction of main body and penetrates main body, second pipeline and third pipeline and fourth pipeline are set on the different positions of main body side wall;Baffle is located in the interior of main body, baffle is spirally arranged along the extension direction of main body, baffle divides the interior of main body into multiple gas intervals that are communicated with each other;Multiple gas passages are located in the interior of main body, multiple gas passages are arranged along the extension direction of main body and penetrate multiple gas intervals and baffle, multiple gas passages are communicated with second pipeline.This ammonia decomposition reaction device provides heating by high-temperature flue gas, and controls high-temperature flue gas to cross-flow heating of ammonia gas;Save energy consumption while also having higher heat exchange coefficient and better heating effect, also improve the equipment integration.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of clean energy equipment, in particular to an ammonia decomposition reaction device and system for preparing hydrogen. BACKGROUND

[0002] Hydrogen energy is a new energy in the 21st century. Hydrogen gas combustion only generates water and can produce a large amount of energy, which can be used to provide fuel for fuel cells and other power equipment. It is an ideal clean energy. Fuel cell is a chemical device that converts chemical energy of fuel into electric energy, and hydrogen fuel cell has the characteristics of high efficiency, energy saving and environmental protection. It is an ideal solution to prevent global climate warming and reduce greenhouse gas emissions. Ammonia is a fuel with high energy density, high safety, no carbon emission and low cost. Using ammonia as a hydrogen energy carrier and decomposing ammonia to form hydrogen to provide hydrogen for fuel cells is a new and reliable way to solve the problem of high cost of hydrogen storage and transportation. The existing ammonia decomposition hydrogen production process is usually completed in an electric heating ammonia decomposition reactor. A catalyst is arranged in the electric heating ammonia decomposition reactor, and flue gas is introduced outside the pipe to realize ammonia decomposition hydrogen production. However, the existing electric heating ammonia decomposition reactor has low gas flow rate outside the decomposition reactor, small heat transfer coefficient, and large volume of the whole device. The energy consumption is large, and the ammonia decomposition efficiency is not high.

[0003] Chinese patent CN110203882A discloses an ammonia decomposition reaction device and system and a hydrogen production method. The patent provides an ammonia decomposition device, which includes a shell, a heating zone, a heat exchange zone, a reaction section, and a heat exchange section. The heat exchange coil is spirally wound on the outer wall of the reaction section to fully heat the ammonia gas. The ammonia gas is fully decomposed into a hydrogen-nitrogen mixture after entering the reaction section, and then the ammonia gas is further decomposed to increase the content of hydrogen gas. In this patent, the ammonia gas is heated by the gas countercurrent heating method. The gas flow rate is low, and the high-temperature gas cannot transfer heat to the ammonia gas well, thereby affecting the ammonia conversion efficiency and the production efficiency. SUMMARY

[0004] In view of the existing ammonia decomposition reaction hydrogen production process, the electric heating ammonia decomposition reactor mainly uses the way of heating ammonia along the direction parallel to the ammonia pipe. This heating method has low gas flow rate, which causes the heat of high-temperature gas to be not well transferred to the ammonia gas during the ammonia decomposition process. The heat transfer coefficient of the equipment is small, which causes the ammonia gas to be not fully decomposed to produce hydrogen, the production efficiency is low, the energy consumption is large, the equipment volume is large, and the equipment is not easy to move. A compact ammonia decomposition reaction device is provided, which can completely decompose ammonia and has high production efficiency.

[0005] The technical scheme adopted by the present application to solve its technical problems is: a kind of ammonia decomposition reaction device with spiral structure, including main body, first pipeline, second pipeline, third pipeline, fourth pipeline, baffle and multiple gas passages: the extension direction of the first pipeline coincides with the extension direction of the main body, the first pipeline penetrates the main body, the second pipeline, the third pipeline and the fourth pipeline are respectively arranged on the different positions of the sidewall of the main body, the baffle is spirally arranged around the first pipeline, the baffle is fixedly connected with the inner wall of the main body, the baffle and the inner wall of the main body jointly form spiral gas interval, one end of the gas interval is communicated with the third pipeline, the other end of the gas interval is communicated with the fourth pipeline;Multiple gas passages are arranged in the main body, one end of the gas passage is communicated with the first pipeline, the other end of the gas passage is communicated with the second pipeline.

[0006] Further, the main body includes a gas discharge portion, a gas reaction portion, and a gas flow-through portion, a first baffle is arranged between the gas discharge portion and the gas reaction portion, a second baffle is arranged between the gas reaction portion and the gas flow-through portion, and the gas discharge portion, the gas reaction portion, and the gas flow-through portion are in communication with each other.

[0007] Further, a ruthenium-based catalyst is arranged in the first pipeline.

[0008] Further, the ammonia decomposition reaction device with spiral structure has six gas passages, the six gas passages are arranged around the first pipeline, the installation direction of the gas passage is parallel to the extension direction of the first pipeline, the distance between adjacent two gas passages is equal to each other, and the distance between each gas passage and the first pipeline is equal to each other.

[0009] Further, the angle between the baffle and the inner wall of the main body ranges from 25° to 40°.

[0010] Further, the baffle is made of metal material, and the thermal conductivity coefficient of the baffle ranges from 200 to 300 W / mK.

[0011] Further, the main body is coated with a heat preservation device.

[0012] Further, flue gas flows through the gas interval; the temperature of the flue gas ranges from 600 to 800 ℃, the flow speed of the flue gas ranges from 10 to 20 m / s, and the gas pressure of the flue gas ranges from 0.1 to 0.5 MPa.

[0013] Further, the minimum mass ratio of flue gas to ammonia in the main body is 5:1.

[0014] The application further discloses a fuel cell system comprising the ammonia decomposition reaction device with a spiral structure, and further comprising an ammonia storage device, a flue gas storage device, a flue gas absorption device, an adsorption device and a fuel cell; the ammonia storage device is communicated with the first pipeline of the ammonia decomposition reaction device with a spiral structure, the flue gas storage device is communicated with the third pipeline of the ammonia decomposition reaction device with a spiral structure, the flue gas absorption device is communicated with the fourth pipeline of the ammonia decomposition reaction device with a spiral structure, the adsorption device is communicated with the second pipeline of the ammonia decomposition reaction device with a spiral structure, and one end of the adsorption device away from the second pipeline is communicated with the fuel cell.

[0015] The ammonia decomposition reaction device with a spiral structure has the advantages that: the gas channel and the baffle are arranged in the interior of the reaction main body, no external power supply is needed, heating is provided by high-temperature flue gas, cross-flow heating of the high-temperature flue gas on ammonia gas is controlled, energy consumption is saved, a higher heat exchange coefficient and better heating effect are achieved, the equipment integration is improved, compared with a traditional ammonia decomposition heating device, all components are integrated together, the equipment volume is reduced, and the device is easy to operate.

[0016] The above content is only a summary of the technical scheme of the application, in order to enable those skilled in the art to more clearly understand the technical scheme of the application, and then can be implemented according to the content of the description and the drawings, and in order to enable the above purpose and other purposes, characteristics and advantages of the application to be more easily understood, the following is described in combination with the specific embodiments of the application and the drawings. BRIEF DESCRIPTION OF DRAWINGS

[0017] The drawings are only used to show the principles, implementation manners, applications, characteristics and effects of the specific embodiments and other related contents of the application, and cannot be considered as limitations of the application.

[0018] In the drawings of the specification:

[0019] Figure 1 The figure is a structural schematic diagram of the ammonia decomposition reaction device with a spiral structure.

[0020] Figure 2 The figure is a structural schematic diagram of the ammonia decomposition reaction device with a spiral structure. DETAILED DESCRIPTION

[0021] In order to explain the possible application scenarios, technical principles, specific schemes that can be implemented, purposes and effects that can be achieved, the following will be described in detail in combination with the specific embodiments listed and the drawings. The embodiments described in this paper are only used to more clearly illustrate the technical scheme of the application, therefore, only as an example, and cannot be used to limit the protection scope of the application.

[0022] Reference herein to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment can be included in at least one embodiment of the application. The appearances of the phrase "in an embodiment" in various places in the specification are not necessarily referring to the same embodiment, nor are separate embodiments necessarily mutually exclusive of one another. In principle, any feature described in relation to an embodiment can be combined with any other feature described in relation to another embodiment, unless technically infeasible or otherwise incompatible.

[0023] Unless otherwise defined, all technical terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used in the description herein is for describing particular embodiments only and is not intended to be limiting of the application.

[0024] In the description of the application, the word "comprise" or "contain" is used in the sense of describing the presence of a stated feature, integer, step, or component, but does not preclude the presence or addition of one or more other features, integers, steps, components, or groups thereof.

[0025] In the present application, the terms such as "first" and "second" are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual number, primary and secondary, or order relationship between the entities or operations.

[0026] In the present application, the word "comprise" or "contain" is used in the sense of describing the presence of a stated feature, integer, step, or component, but does not preclude the presence or addition of one or more other features, integers, steps, components, or groups thereof.

[0027] In the present application, "greater than", "less than", "exceed" and the like are understood as not including the number itself, and "above", "below", "within" and the like are understood as including the number itself. In addition, in the description of the embodiments of the present application, the meaning of "multiple" is more than two (including two), and similar expressions related to "multiple" are also understood in this way, for example, "multiple groups", "multiple times" and the like, unless otherwise specifically limited.

[0028] In the description of the embodiments of the present application, the spatial relative expressions, such as "central", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "vertical", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", and the like, indicate the orientation or positional relationship shown in the specific embodiments or the drawings, and are only used to facilitate the description of the specific embodiments of the present application or to facilitate the understanding of the reader, and do not indicate or imply that the indicated device or component must have a particular position, a particular orientation, or be constructed or operated in a particular orientation, and therefore cannot be understood as a limitation on the embodiments of the present application.

[0029] Unless otherwise explicitly specified or limited, in the description of the embodiments of the present application, the terms "mount", "connect", "connect", "fix", "set", and the like should be understood broadly. For example, the "connection" can be fixed connection, or detachable connection, or integral setting; it can be mechanical connection, or electrical connection, or communication connection; it can be direct connection, or indirect connection through intermediate medium; it can be the communication or interaction relationship between two elements. For those skilled in the art to which the present application belongs, the specific meaning of the above terms in the embodiments of the present application can be understood according to the specific circumstances.

[0030] As shown in Figure 1 and Figure 2 A kind of ammonia decomposition reaction device with spiral structure of the present application, including main body 1, first pipeline 2, second pipeline 3, third pipeline 4, fourth pipeline 5, baffle 6 and multiple gas passages 7, the extension direction of the first pipeline 2 coincides with the extension direction of the main body 1 and penetrates the main body 1, the second pipeline 3, the third pipeline 4 and the fourth pipeline 5 are respectively arranged on the different positions of the side wall of the main body 1, the baffle 6 is spirally arranged around the first pipeline 2, the baffle 6 is fixedly connected with the inner wall of the main body 1, the baffle 6 and the inner wall of the main body 1 jointly form spiral gas interval, one end of the gas interval is communicated with the third pipeline 4, the other end of the gas interval is communicated with the fourth pipeline 5;Multiple gas passages 7 are arranged in the main body 1, one end of the gas passage 7 is communicated with the first pipeline 2, the other end of the gas passage 7 is communicated with the second pipeline 3.The ammonia decomposition reaction device with spiral structure, by using the gas with higher temperature to carry out cross flow circulation heating to ammonia, to promote ammonia to decompose under the action of catalyst to generate mixed gas of nitrogen and hydrogen;Improve the heating stability in ammonia decomposition process, so that ammonia can be uniformly heated and decomposed, improve the heating effect, heating efficiency and system flexibility of the device.

[0031] AsFigure 1 As shown, the main body 1 comprises a gas discharge part 11, a gas reaction part 12 and a gas flow-through part 13, a first baffle is arranged between the gas discharge part 11 and the gas reaction part 12, the first baffle separates the gas discharge part 11 and the gas reaction part 12, a second baffle is arranged between the gas reaction part 12 and the gas flow-through part 13, the second baffle separates the gas reaction part 12 and the gas flow-through part 13, the gas discharge part 11, the gas reaction part 12 and the gas flow-through part 13 are communicated with each other; the gas discharge part 11 is used for collecting the mixed gas after the decomposition of ammonia, and discharging the ammonia decomposition reaction device through the second pipeline 3; the gas reaction part 12 is used for the decomposition of ammonia to generate hydrogen, nitrogen and part of the mixed gas of ammonia under the action of auxiliary gas; the gas flow-through part 13 is used for collecting the mixed gas after the decomposition of ammonia and introducing into a plurality of gas channels 7; preferably, the main body 1 is a cylindrical structure, the cylindrical structure can make the gas for heating fully and uniformly contact with the ammonia in the first pipeline 2 and the gas reaction part 12, thereby improving the decomposition efficiency of ammonia; the main body 1 is made of stainless steel material.

[0032] The first pipeline 2 penetrates the gas discharge part 11 and the gas reaction part 12 of the main body 1, one end of the first pipeline 2 is communicated with the ammonia supply end, the other end of the first pipeline 2 is communicated with the gas flow-through part 13; the first pipeline 2 is used for introducing ammonia into the main body 1, when the ammonia enters the gas reaction part 12 through the first pipeline 2, the ammonia decomposes in the first pipeline 2 to generate hydrogen, nitrogen and part of the mixed gas of unreacted ammonia, the mixed gas containing hydrogen, nitrogen and a small amount of ammonia flows into the gas flow-through part 13 along the extension direction of the first pipeline 2, preferably, in order to improve the decomposition effect of ammonia in the first pipeline 2, so that the ammonia can be fully decomposed into hydrogen and nitrogen, a ruthenium-based catalyst is added in the first pipeline 2, the ruthenium-based catalyst can fully contact with ammonia, so that the ammonia can be more completely and quickly decomposed into hydrogen and nitrogen, the content of residual ammonia in the mixed gas is reduced, and the decomposition efficiency of ammonia is improved.

[0033] When the ammonia gas is decomposed into hydrogen and nitrogen mixed gas in the first pipeline 2 under the action of the catalyst, the mixed gas containing hydrogen, nitrogen and a small amount of ammonia enters the gas flow part 13 along the first pipeline 2, and the mixed gas is collected in the gas flow part 13 and then enters a plurality of gas channels 7; specifically, the ammonia decomposition reaction device with a spiral structure has six gas channels 7, the six gas channels 7 are arranged around the first pipeline 2, the installation direction of the gas channel 7 is parallel to the extension direction of the first pipeline 2, the distance between adjacent two gas channels 7 is equal to each other, and the distance between each gas channel 7 and the first pipeline 2 is equal to each other; one end of the gas channel 7 is in communication with the gas discharge part 11 of the main body 1 and the second pipeline 3, and the other end of the gas channel 7 is in communication with the gas flow part 13, a plurality of gas channels 7 penetrate the gas reaction part 12, and the cross-sectional shape of the gas channel 7 corresponds to the cross-sectional shape of the main body 1.

[0034] The partition plate 6 is arranged inside the gas reaction part 12 of the main body 1, and the partition plate 6 spirally extends along the extension direction of the main body 1 towards the direction close to the gas flow part 13; specifically, the edge of the partition plate 6 is fixedly connected to the inner wall of the main body 1 at a specific angle, the angle between the edge of the partition plate 6 and the inner wall of the main body 1 ranges from 25° to 40°, for example, 30°, the partition plate 6 divides the gas reaction part 12 into six gas spaces, adjacent two gas spaces are in communication with each other, and six gas spaces are in communication with each other to form the gas interval; more specifically, the cross-sectional shape of the partition plate 6 corresponds to the cross-sectional shape of the main body 1, and a plurality of gas channels 7 are fixedly connected to the partition plate 6. Preferably, in order to improve the efficiency of the ammonia decomposition reaction and make the ammonia gas be fully and uniformly decomposed, the partition plate 6 is made of metal material, the partition plate 6 has a thermal conductivity of 200-300 W / mK, for example, 250 W / mK, so as to reduce the heat loss on the partition plate 6 and improve the heating effect of the ammonia gas; the main body 1 is covered with a heat preservation device, the heat preservation device is used to reduce the heat consumption during the ammonia decomposition reaction, thereby improving the ammonia decomposition efficiency.

[0035] The third pipeline 4 is arranged on the side wall of the main body 1, the third pipeline 4 communicates with one of the gas spaces, the fourth pipeline 5 is arranged on the side wall of the main body 1, the third pipeline 4 and the fourth pipeline 5 are arranged opposite to each other, the installation direction of the third pipeline 4 is perpendicular to the extension direction of the main body 1; the installation direction of the fourth pipeline 5 is perpendicular to the extension direction of the main body 1, the third pipeline 4 and the fourth pipeline 5 are arranged in parallel to each other, the fourth pipeline 5 communicates with the other gas space, specifically, the third pipeline 4 communicates with the gas space close to the gas exhaust part 11 of the main body 1, the fourth pipeline 5 communicates with the gas space close to the gas flow-through part 13 of the main body 1, the third pipeline 4 is used for guiding the auxiliary gas into the gas space, when the gas with higher temperature enters the gas space close to the gas exhaust part 11 through the third pipeline 4, under the action of the partition plate 6, the gas makes spiral motion in the gas reaction part 12 and flows towards the direction close to the gas flow-through part 13; and is discharged from the main body 1 through the fourth pipeline 5; at the same time, when guiding the gas into the third pipeline 4, the ammonia gas is guided into the gas reaction part 12 through the first pipeline 2, the ammonia gas is decomposed under the action of the catalyst in the gas reaction part 12 to generate the mixed gas of hydrogen and nitrogen, the gas makes spiral motion in the gas reaction part 12, the ammonia gas in the first pipeline 2 is cross-flow heated by using the heat of the gas, so that the ammonia gas can reach the temperature required by the ammonia decomposition more quickly, the ammonia gas in each part of the first pipeline 2 can be uniformly heated, the effect and decomposition efficiency of the ammonia decomposition reaction in the first pipeline 2 are improved, and the heat loss in the heating process is reduced.

[0036] The gas flowing into the third pipeline 4 and into the gas section is flue gas with a temperature of 600-800℃, and the composition of the flue gas is a mixed gas composed of air, water vapor and nitrogen. The flue gas flows spirally along the extension direction of the gas section, and fully contacts the first pipeline 2 during the flow process. Under the joint action of the flue gas and the catalyst, the ammonia fully occurs decomposition reaction in the first pipeline 2 to generate nitrogen and hydrogen. The flow direction of the flue gas and the flow direction of the ammonia in the gas reaction part 12 are staggered with each other, thereby improving the flow rate of the flue gas, and also improving the contact area of the flue gas and the ammonia, so that the ammonia can more fully occur decomposition reaction, and the decomposition efficiency of the ammonia is improved. Preferably, in order to reduce the operation cost and improve the heating effect of the flue gas, the flue gas is air with a temperature of 650-750℃. In order to make the ammonia more completely decomposed into hydrogen-nitrogen mixed gas, and the ammonia in the first pipeline 2 can be uniformly heated by the flue gas, specifically, the flow speed of the flue gas in the gas section is 10-20m / s, for example, 15m / s. The gas pressure of the flue gas is 0.1-0.5MPa, for example, 0.3MPa. The minimum mass ratio of the flue gas to the ammonia in the main body is 5:1, so that the flue gas can fully flow around the first pipeline 2 to perform cross-flow heating on the ammonia. In order to adjust the flow of the flue gas, thereby adjusting the reaction of the ammonia and the flue gas according to the actual situation to maximize the reaction rate, improve the reaction efficiency of the ammonia and control the operation cost, a flue gas flow control device is arranged on the third pipeline 4, and an ammonia flow control device is arranged on the gas inlet of the first pipeline 2, so that the reaction efficiency of the ammonia and the flue gas is maximized, the waste of flue gas heat due to too little ammonia or the insufficient decomposition due to too much ammonia is avoided, and the system production efficiency is improved.

[0037] The hydrogen-nitrogen mixed gas after decomposition is then collected in the gas flow-through part 13, then flows into a plurality of gas channels 7, and then flows into the gas discharge part 11 along the extension direction of the plurality of gas channels 7, and is discharged from the main body 1 through the second pipeline 3. The gas channels and the partitions in the ammonia decomposition reactor are arranged inside the reaction main body, without external power supply, the flue gas with a higher temperature is used to provide heating, and the cross-flow heating of the flue gas on the ammonia is controlled. The energy consumption is saved, and the heat exchange coefficient and the heating effect are high, and the equipment integration is improved. Compared with the traditional ammonia decomposition heating device, all the parts are integrated in the device, including the ammonia decomposition module and the ammonia heating module, the equipment volume is reduced, and the operation is easy, which is also beneficial to the ammonia decomposition reaction.

[0038] The application further discloses an ammonia decomposition reaction system comprising the ammonia decomposition reaction device with the spiral structure, which comprises an ammonia storage device, the ammonia decomposition reaction device, a flue gas storage device, a flue gas absorption device, an adsorption device and a fuel cell; the ammonia storage device is communicated with the first pipeline 2 of the ammonia decomposition reaction device, the flue gas storage device is communicated with the third pipeline 4 of the ammonia decomposition reaction device, the flue gas absorption device is communicated with the fourth pipeline 5 of the ammonia decomposition reaction device, the adsorption device is communicated with the second pipeline 3 of the ammonia decomposition reaction device, the adsorption device is used for removing residual ammonia gas in the mixed gas, thereby improving the content of hydrogen gas in the mixed gas, and the end of the adsorption device far from the second pipeline 3 is further communicated with the terminal of the fuel cell; the mixed gas after being adsorbed by the adsorption device is introduced into the terminal of the fuel cell, so that the fuel cell can convert the chemical energy of the gas into electric energy.

[0039] The heating device is used for heating liquid ammonia to the heat required for ammonia decomposition, so as to form ammonia gas; in order to improve the energy utilization rate of the ammonia decomposition reaction system, preferably, a heat exchange device is arranged between the fourth pipeline 5 and the flue gas absorption device, the fourth pipeline 5 is cross-connected with the first pipeline 2, the heat exchange device is further communicated with the ammonia storage device and the first pipeline 2 of the ammonia decomposition reaction device, the heat exchange device can transfer the heat of the flue gas introduced from the fourth pipeline 5 into the flue gas absorption device to the ammonia gas introduced from the ammonia storage device into the ammonia decomposition reaction, thereby reducing the heat required for vaporization of liquid ammonia and also reducing the heat of the flue gas, achieving the effect of reducing energy consumption; more specifically, the adsorption device is a pressure swing adsorption or temperature swing adsorption.

[0040] It should be noted that although the above-mentioned embodiments have been described in the present text, the patent protection scope of the present application is not limited thereby. Therefore, based on the innovative idea of the present application, the changes and modifications of the embodiments described in the present text, or the equivalent structure or equivalent process transformation made by using the content of the present application specification and drawings, directly or indirectly applying the above technical solutions to other related technical fields, are all included in the patent protection scope of the present application.

Claims

1. An ammonia decomposition reaction system, comprising an ammonia storage device, a flue gas storage device, a flue gas absorption device, an adsorption device, and a fuel cell; characterized in that: It also includes an ammonia decomposition reaction device with a spiral structure; the ammonia decomposition reaction device with a spiral structure includes a main body, a first pipe, a second pipe, a third pipe, a fourth pipe, a partition, and six gas channels. The extension direction of the first pipe coincides with the extension direction of the main body and penetrates the main body. The second pipe, the third pipe, and the fourth pipe are respectively arranged at different positions on the side wall of the main body. The partition is spirally arranged around the first pipe and is fixedly connected to the inner wall of the main body. The installation angle between the partition and the inner wall of the main body is in the range of 25° to 40°. The partition is made of metal and has a thermal conductivity of 200 to 300 W / mK. The partition and the inner wall of the main body together form a spiral. The gas compartment is shaped like a partition; the partition divides the gas reaction section of the main body into six gas spaces, with adjacent gas spaces connected to each other, forming the gas compartment; one end of the gas compartment is connected to the third pipe, and the other end of the gas compartment is connected to the fourth pipe; six gas channels are disposed inside the main body, one end of each gas channel is connected to the first pipe, and the other end of each gas channel is connected to the second pipe; the six gas channels are arranged around the first pipe, the installation direction of the gas channels is parallel to the extension direction of the first pipe, the distance between adjacent gas channels is equal to each other, and the distance of each gas channel from the first pipe is equal to each other; The ammonia storage device is connected to the first pipe of the ammonia decomposition reaction device with a spiral structure, the flue gas storage device is connected to the third pipe of the ammonia decomposition reaction device with a spiral structure, the flue gas absorption device is connected to the fourth pipe of the ammonia decomposition reaction device with a spiral structure, the adsorption device is connected to the second pipe of the ammonia decomposition reaction device with a spiral structure, and the end of the adsorption device away from the second pipe is connected to the fuel cell.

2. The ammonia decomposition reaction system according to claim 1, characterized in that: The main body includes a gas discharge section, a gas reaction section, and a gas flow section. A first baffle is provided between the gas discharge section and the gas reaction section, and a second baffle is provided between the gas reaction section and the gas flow section. The gas discharge section, the gas reaction section, and the gas flow section are interconnected.

3. The ammonia decomposition reaction system according to claim 1, characterized in that: The first pipe contains a ruthenium-based catalyst.

4. The ammonia decomposition reaction system according to claim 1, characterized in that: The main body is covered with a heat insulation device.

5. The ammonia decomposition reaction system according to claim 1, characterized in that: Flue gas flows through the gas compartment; the temperature of the flue gas is 600-800℃, the flow velocity of the flue gas is 10-20m / s, and the gas pressure range of the flue gas is 0.1-0.5 MPa.

6. The ammonia decomposition reaction system according to claim 5, characterized in that: The minimum mass ratio of the flue gas to the ammonia in the main body is 5:1.

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