A deep-sea high-power ammonia hydrogen storage fuel cell energy supply system and process

Abstract

The invention discloses a deep-sea high-power ammonia hydrogen storage fuel cell energy supply system and process, the energy supply system comprises an ammonia storage tank, an ammonia decomposition reactor, a membrane separator, a hydrogen fuel cell, a buffer bottle and a liquid oxygen tank; wherein the ammonia decomposition reactor is a sleeve-type structure, comprising an inner tube and a jacket outside the inner tube, a catalyst layer is arranged on the inner wall of the jacket, and an igniter is arranged in the jacket, the air inlet end of the inner tube is connected to the ammonia storage tank, and the air outlet end of the inner tube is connected to the inlet of the membrane separator; the clean gas outlet of the membrane separator is connected to the hydrogen inlet of the hydrogen fuel cell, and the tail gas outlet on the inlet side of the membrane separator and the liquid oxygen tank are both connected to the inlet of the jacket; the outlet of the jacket and the outlet of the liquid oxygen tank are both connected to the inlet of the buffer bottle, and the outlet of the buffer bottle is connected to the air inlet of the hydrogen fuel cell.

Description

Technical Field

[0001] The present invention belongs to the technical field of hydrogen fuel cells, and in particular relates to a deep-sea high-power ammonia hydrogen storage fuel cell energy supply system and process. Background Art

[0002] The statements herein merely provide background information related to the present invention and do not necessarily constitute prior art.

[0003] With the continuous deepening of marine development, underwater monitoring is gradually moving towards the deep sea, and the demand is also increasing. Electricity supply is one of the problems of long-term seabed observation equipment, especially in deep-sea areas where there is no condition for long-distance cable power supply. If conventional lithium batteries are used for long-term power supply, the volume of the pressure cabin will be huge, difficult to assemble and there are safety hazards. Hydrogen fuel cells have been widely used in distributed energy supply due to their high power conversion efficiency, pollution-free and low noise. However, the deep-sea operation cabin is a closed cabin with limited space, long unattended operation and long endurance. The amount of hydrogen and air required is large, and hydrogen and air exist in the form of gas even after high-pressure compression, resulting in a large volume of high-pressure tanks, which are difficult to use in the deep sea. The hydrogen-oxygen fuel cell technology with pure oxygen as the gas source is immature, short life and high cost, which limits the application of hydrogen fuel cells in deep-sea energy supply.

[0004] In addition, in the deep-sea environment of 1000m below the sea, the water pressure can reach 10MPa. The water and gas (nitrogen) generated during the operation of the hydrogen fuel cell consume a lot of energy when discharged directly outside the cabin. If stored in the cabin, it will take up a lot of space, which in turn puts higher requirements on the volume of the deep-sea operation cabin. The above factors are not conducive to long-term deep-sea operations. Summary of the invention

[0005] In view of the deficiencies in the prior art, the object of the present invention is to provide a deep-sea high-power ammonia hydrogen storage fuel cell energy supply system and process.

[0006] In order to achieve the above object, the present invention is implemented through the following technical solutions:

[0007] In a first aspect, the present invention provides a deep-sea high-power ammonia hydrogen storage fuel cell energy supply system, including an ammonia storage tank, an ammonia decomposition reactor, a membrane separator, a hydrogen fuel cell, a buffer bottle and a liquid oxygen tank; wherein:

[0008] The ammonia decomposition reactor is a sleeve-type structure, including an inner tube and a jacket outside the inner tube, a catalyst layer is arranged on the inner wall of the jacket, and an igniter is arranged in the jacket, the air inlet end of the inner tube is connected to the ammonia storage tank, and the air outlet end of the inner tube is connected to the inlet of the membrane separator;

[0009] The clean gas outlet of the membrane separator is connected to the hydrogen inlet of the hydrogen fuel cell, and the tail gas outlet on the inlet side of the membrane separator and the liquid oxygen tank are both connected to the inlet of the jacket;

[0010] The outlet of the jacket is connected to the inlet of the buffer bottle through the gas-liquid separator and the outlet of the liquid oxygen tank, and the outlet of the buffer bottle is connected to the air inlet of the hydrogen fuel cell.

[0011] Ammonia can be liquefied at room temperature and 0.8MPa. The liquefied ammonia is stored in a liquid ammonia storage tank, which can effectively increase the storage capacity of ammonia. When ammonia is catalytically pyrolyzed, sufficient hydrogen can be obtained. This method can effectively reduce the storage volume of fuel, laying the foundation for long-term deep-sea operations.

[0012] The ammonia decomposition reactor is a shell-and-tube structure. The membrane separator separates relatively pure hydrogen, while the filtered tail gas contains nitrogen, a portion of hydrogen and a small amount of unreacted ammonia. This part of the tail gas is passed into the jacket of the ammonia decomposition reactor for catalytic combustion, which can provide sufficient heat for the catalytic pyrolysis of ammonia. In addition, recycling this part of the tail gas not only realizes the resource utilization of hydrogen and a small amount of ammonia, but also saves the energy consumption of discharging this part of the tail gas outside the cabin, and at the same time avoids pollution to the seawater.

[0013] Since the technology of using pure oxygen as a gas source for hydrogen fuel cells is immature, the life of hydrogen fuel cells is short, and the price of such hydrogen fuel cells is much higher than that of hydrogen fuel cells using air as a gas source, pure oxygen hydrogen fuel cells are currently difficult to use to provide energy for long-term deep-sea operations. However, air is difficult to compress, and even after being compressed, the volume is still large, making it difficult to apply to small deep-sea operating cabins.

[0014] In the present invention, the outlet of the jacket is connected to the inlet of the buffer bottle through the gas-liquid separator and the outlet of the liquid oxygen tank, and the outlet of the buffer bottle is connected to the air inlet of the hydrogen fuel cell. Since the tail gas separated by the membrane separator and the oxygen are catalytically burned, the products are nitrogen and water. Since the tail gas also contains a large amount of nitrogen, the gas after the catalytic combustion is nitrogen containing more water. Most of the water is separated and removed through the gas-liquid separator to obtain relatively moist nitrogen. After mixing this part of nitrogen with pure oxygen in a proportion in the buffer tank, simulated air is obtained, and the simulated air can be introduced into the hydrogen fuel cell to participate in the reaction. Since nitrogen is moisture, the mixed simulated air is moist air. When it is introduced into the battery, it is beneficial to moisten the diaphragm and promote the normal operation of the hydrogen fuel cell.

[0015] In some embodiments, a carbon adsorber is connected between the outlet of the membrane separator and the hydrogen inlet of the hydrogen fuel cell.

[0016] The carbon adsorber is used to purify the hydrogen gas after preliminary purification again to obtain purer hydrogen gas.

[0017] In some embodiments, an anti-corrosion elastic diaphragm is provided on the cross-section of the ammonia storage tank, and the anti-corrosion elastic diaphragm separates the ammonia storage tank into a first chamber and a second chamber, wherein liquid ammonia is stored in the first chamber, and the second chamber is connected to the drain port of the hydrogen fuel cell and the drain port of the gas-liquid separator.

[0018] Preferably, a liquid storage tank and a pump are connected between the second chamber and the liquid discharge port of the hydrogen fuel cell and the liquid discharge port of the gas-liquid separator. Since ammonia can be liquefied at room temperature and 0.8MPa, the pressure in the ammonia storage tank is much lower than the pressure outside the cabin, so the water generated during the operation of the hydrogen fuel cell is pumped into the second chamber of the ammonia storage tank, which can save a lot of energy compared to direct external discharge, and ammonia is continuously consumed during the operation of the hydrogen fuel cell, so using the ammonia storage tank to store the generated water can effectively save the occupied volume and is more conducive to the miniaturization of the deep-sea operation cabin.

[0019] In some embodiments, a multi-stage gas storage tank is also included, and a miniature pump-type air pump is provided between two adjacent gas storage tanks. The inlet of the multi-stage gas storage tank is connected to the gas outlet of the hydrogen fuel cell, and the outlet of the multi-stage gas storage tank is connected to the outside of the cabin.

[0020] Since the gas introduced into the hydrogen fuel cell is simulated air, the oxygen in it participates in the reaction to generate water, while a large amount of nitrogen does not participate in the reaction and needs to be discharged. As the hydrogen fuel cell continues to work, the amount of nitrogen produced by the decomposition of ammonia continues to increase. However, due to the low nitrogen production rate, it is difficult to keep the pump working to discharge it outside the cabin, and the pump consumes a lot of energy.

[0021] A multi-stage gas tank is used, and the two adjacent gas tanks are connected by a micro-pump-type air pump. The first-stage gas tank can collect and buffer the nitrogen discharged from the hydrogen fuel cell. When a certain pressure is reached, a pump is used to pump it to the next stage for pressurized storage. The multi-stage gas tank is used to pressurize the nitrogen at multiple stages before discharging it, which can effectively reduce the energy consumption of nitrogen discharge and ensure the continuous operation of the air pump for a period of time.

[0022] Preferably, the multi-stage gas storage tank is a three-stage gas storage tank, including a first gas storage tank, a second gas storage tank and a third gas storage tank.

[0023] In a second aspect, the present invention provides a deep-sea high-power ammonia hydrogen storage fuel cell energy supply process, comprising the following steps:

[0024] The liquid ammonia in the hydraulic tank is gasified and then transported to the ammonia decomposition reactor for catalytic pyrolysis to obtain a mixed gas of nitrogen, hydrogen and unreacted ammonia;

[0025] The mixed gas is passed into a membrane separator for separation to obtain primary purified hydrogen and filtered tail gas. The primary purified hydrogen is subjected to secondary adsorption purification to obtain pure hydrogen, which is then passed into a hydrogen fuel cell to participate in the reaction;

[0026] The tail gas separated by the membrane separator is introduced into the ammonia decomposition reactor for catalytic combustion, providing heat for the catalytic pyrolysis of ammonia;

[0027] The wet nitrogen after catalytic combustion of the exhaust gas is mixed with the preheated oxygen to form simulated air, which is then introduced into the hydrogen fuel cell to participate in the reaction.

[0028] In some embodiments, the temperature of catalytic pyrolysis of ammonia in the ammonia decomposition reactor is 550-650°C.

[0029] In some embodiments, the method further includes collecting water generated during the operation of the hydrogen fuel cell and transporting the water to the second chamber of the ammonia storage tank.

[0030] In some embodiments, the step of collecting the nitrogen generated during the operation of the hydrogen fuel cell and then pre-pressurizing and discharging it is also included.

[0031] The beneficial effects achieved by one or more embodiments of the present invention are as follows:

[0032] Ammonia can be almost completely decomposed at around 600°C under the action of a catalyst. The mixed gas contains nitrogen, hydrogen and a trace amount of unreacted ammonia. The mixed gas is separated by adsorption in a membrane separator and an adsorber to obtain pure hydrogen, which is input into the anode of the fuel cell as an anode fuel to generate electricity. The remaining hydrogen and nitrogen that have not passed through the membrane separator are mixed with oxygen from the liquid oxygen tank and then passed into the interlayer of the ammonia decomposition reactor, where a catalytic combustion reaction occurs, providing sufficient temperature for the ammonia decomposition reaction.

[0033] The liquid ammonia storage tank has an elastic anti-corrosion diaphragm. The upper space of the diaphragm is filled with liquid ammonia. As the liquid ammonia is consumed, the generated water is pumped into the lower space of the diaphragm by a water pump. Since ammonia can be liquefied at room temperature and 0.8MPa, the pressure in the ammonia storage tank is lower than that outside the cabin. Pumping water into the ammonia storage tank consumes less energy and reduces the floor space of the water storage tank.

[0034] For the storage of nitrogen, a multi-stage buffer chamber is designed. Each stage is equipped with a pressure sensor. There is a trace air pump between the two stages. When the pressure in the third stage is higher than the pressure outside the cabin, the exhaust port opens and exhausts gas to the outside. When it is lower than the pressure, the valve closes automatically. This method can effectively save energy consumption for gas exhaust. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] The accompanying drawings in the specification, which constitute a part of the present invention, are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute improper limitations on the present invention.

[0036] Figure 1 is a schematic diagram of the overall structure of an embodiment of the present invention;

[0037] Among them, I-ammonia storage tank; II-ammonia decomposition reactor; 21-inner tube; 22-jacket; III-membrane separator; IV-adsorber; V-hydrogen fuel cell; VI-buffer bottle; VII-liquid oxygen tank; VIII-elastic diaphragm; IX-nitrogen storage tank; X-liquid storage tank; XI-energy supply cabin;

[0038] ① ammonia; ② hydrogen-nitrogen mixture; ③ hydrogen and trace ammonia; ④ hydrogen; ⑤ nitrogen; ⑥ oxygen; ⑦ air; ⑧ air; ⑨ residual hydrogen-nitrogen mixture after separation; ⑩ wet nitrogen; water. DETAILED DESCRIPTION

[0039] It should be noted that the following detailed descriptions are illustrative and intended to provide further explanation of the present invention. Unless otherwise specified, all technical and scientific terms used in the present invention have the same meanings as those commonly understood by those skilled in the art to which the present invention belongs.

[0040] The present invention will be further described below in conjunction with the embodiments.

[0041] Example

[0042] like Figure 1 As shown, a deep-sea high-power ammonia hydrogen storage fuel cell energy supply system includes an ammonia storage tank I, an ammonia decomposition reactor II, a membrane separator III, a hydrogen fuel cell V, a buffer bottle VI and a liquid oxygen tank VII; wherein,

[0043] The ammonia decomposition reactor II is a sleeve-type structure, comprising an inner tube 21 and a jacket 22 outside the inner tube, a catalyst layer is arranged on the inner wall of the jacket 22, and an igniter is arranged in the jacket 22, the air inlet end of the inner tube 21 is connected to the ammonia storage tank I, and the air outlet end of the inner tube 21 is connected to the inlet of the membrane separator III;

[0044] The clean gas outlet of the membrane separator III is connected to the hydrogen inlet of the hydrogen fuel cell V, and the tail gas outlet on the inlet side of the membrane separator III and the liquid oxygen tank VII are both connected to the inlet of the jacket 22; an adsorber IV is connected between the outlet of the membrane separator III and the hydrogen inlet of the hydrogen fuel cell V;

[0045] The outlet of the jacket 22 and the outlet of the liquid oxygen tank VII are both connected to the inlet of the buffer bottle VI, and the outlet of the buffer bottle VI is connected to the air inlet of the hydrogen fuel cell V.

[0046] An anti-corrosion elastic diaphragm is arranged on the cross section of the ammonia storage tank I, which separates the ammonia storage tank I into a first chamber and a second chamber. Liquid ammonia is stored in the first chamber, and the second chamber is connected to the discharge port of the hydrogen fuel cell V.

[0047] A liquid storage tank X and a pump are connected between the second chamber and the liquid discharge port of the hydrogen fuel cell V.

[0048] There are also three-stage gas tanks, namely the first gas tank, the second gas tank and the third gas tank. A micro-pump-type air pump is provided between two adjacent gas tanks. The inlet of the three-stage gas tank is connected to the gas outlet of the hydrogen fuel cell, and the outlet of the three-stage gas tank is connected to the outside of the cabin.

[0049] The gas discharge port of the hydrogen fuel cell V is connected to the inlet of the buffer bottle VI, and the nitrogen discharged from the hydrogen fuel cell V can be mixed with pure oxygen to prepare simulated air.

[0050] The energy supply process comprises the following steps:

[0051] The liquid ammonia in the ammonia storage tank I is gasified and then transported to the ammonia decomposition reactor II for catalytic pyrolysis to obtain a mixed gas of nitrogen, hydrogen and unreacted ammonia;

[0052] The mixed gas is passed into the membrane separator III for separation to obtain primary purified hydrogen and filtered tail gas. The primary purified hydrogen is subjected to secondary adsorption purification to obtain pure hydrogen, which is passed into the hydrogen fuel cell V to participate in the reaction;

[0053] The tail gas separated by the membrane separator III is introduced into the ammonia decomposition reactor II for catalytic combustion, providing heat for the catalytic pyrolysis of ammonia;

[0054] The mixed gas after catalytic combustion of the exhaust gas is mixed with the preheated oxygen to form simulated air, and the simulated air is introduced into the hydrogen fuel cell V to participate in the reaction.

[0055] The temperature of catalytic pyrolysis of ammonia in the ammonia decomposition reactor II is 550-650° C. The water generated during the operation of the hydrogen fuel cell V is collected and transported to the second chamber of the ammonia storage tank I for storage. The nitrogen generated during the operation of the hydrogen fuel cell is collected and discharged after primary pressurization.

[0056] Since the temperature of ammonia catalytic pyrolysis is high, the temperature of the product mixed gas is high and cannot directly enter the membrane separator for gas purification. Therefore, the heat of the mixed gas can be partially recovered to adjust the temperature of the mixed gas entering the membrane separator.

[0057] Since the temperature of liquid oxygen is relatively low, the temperature of the vaporized oxygen is still very low and it is difficult to meet the use requirements, so the vaporized oxygen needs to be preheated.

[0058] The reaction gas in the jacket of the ammonia decomposition reactor is a catalytic combustion process, which also releases a large amount of heat, and the temperature of the discharged mixed gas is relatively high, so the heat in this part of the mixed gas needs to be recovered and utilized.

[0059] Ammonia is used as the hydrogen storage raw material, which is decomposed into hydrogen at a certain temperature as the anode gas source of the fuel cell. The nitrogen produced by the decomposition of ammonia is mixed with liquid oxygen to form simulated air as the cathode gas source of the fuel cell. After the fuel cell generates electricity, it provides long-term stable, safe, and high-power electricity for deep-sea energy-consuming equipment.

[0060] The ammonia decomposition reaction is an endothermic reaction. The higher the reaction temperature, the more complete the ammonia decomposition. At 600°C, it can reach more than 99%. Therefore, the ammonia decomposition reaction is a high-energy-consuming reaction. In order to reduce the energy consumption of the ammonia decomposition reaction, this project uses a jacketed ammonia decomposition reactor. The inner tube passes ammonia, which is decomposed into hydrogen and nitrogen through the catalytic bed; the interlayer passes a mixture of tail gas (tail gas is a mixture of hydrogen, nitrogen and a small amount of ammonia) and oxygen, and a hydrogen combustion reaction is carried out to provide sufficient temperature for the ammonia decomposition reaction to ensure the complete decomposition of ammonia. Among them, the hydrogen comes from the residual hydrogen after the separation of hydrogen and nitrogen and the anode tail gas of the fuel cell, and the oxygen comes from the liquid oxygen tank.

[0061] The discharge of exhaust gas and waste liquid is a key issue in the deep sea environment. The water pressure at 1000 meters below the sea can reach 10MPa. Directly discharging liquid / gas outside the cabin consumes a lot of energy. If stored in the cabin, it will take up a lot of space.

[0062] The cross section of the liquid ammonia storage tank in the present invention is provided with an elastic anti-corrosion diaphragm, and the upper space of the diaphragm is filled with liquid ammonia. As the liquid ammonia is consumed, the generated water is pumped into the lower space of the diaphragm by a water pump. Since ammonia can be liquefied at room temperature and 0.8MPa, the pressure of the ammonia storage tank is lower than that outside the cabin, so pumping water into the ammonia storage tank consumes less energy and reduces the floor space of the water storage tank.

[0063] In addition, a single fuel cell has poor dynamic regulation capabilities and cannot provide large currents instantly. A coupled power supply system using hydrogen fuel cells as the main power source and lithium batteries and supercapacitors as auxiliary power sources can compensate for the soft volt-ampere characteristics of the fuel cell, reduce system response time, and ensure the power safety of energy-consuming equipment.

[0064] Ammonia can be almost completely decomposed at around 600°C under the action of a catalyst. The mixed gas contains nitrogen, hydrogen and a trace amount of unreacted ammonia. The mixed gas is separated by adsorption in a membrane separator and an adsorber to obtain pure hydrogen, which is input into the anode of the fuel cell as an anode fuel to generate electricity. The remaining hydrogen and nitrogen that have not passed through the membrane separator are mixed with oxygen from the liquid oxygen tank and then passed into the interlayer of the ammonia decomposition reactor, where a catalytic combustion reaction occurs, providing sufficient temperature for the ammonia decomposition reaction.

[0065] The tail gas nitrogen after the sandwich catalytic combustion and the oxygen from the liquid oxygen tank are mixed in proportion in the buffer tank to form simulated air, and the simulated air is introduced into the cathode inlet of the fuel cell as an oxygen source. Since nitrogen does not participate in the electrochemical reaction of the fuel cell, the nitrogen discharged from the fuel cell outlet can be recycled, and the oxygen output of the liquid oxygen tank is regulated to control the oxygen content in the buffer tank.

[0066] As the ammonia decomposition reaction continues, the amount of nitrogen continues to increase. The excess nitrogen that is not involved in the air preparation is temporarily stored in the three-stage air tank. There is a miniature air pump between every two stages of the air tank. The inlet of the air pump is connected to the outlet of the upper stage of the air tank, and the outlet of the air pump is connected to the inlet of the next stage. Each stage of the air tank is equipped with a pressure detector. When the pressure is higher than the set value, the air pump automatically starts to pump the gas in the upper stage of the tank into the next stage of the air tank. When the pressure of the last stage of the air tank is higher than the set value of the water pressure outside the cabin, the exhaust valve opens and the nitrogen is discharged outside the energy supply cabin into the seawater until the pressure is lower than the set value and the valve automatically closes.

[0067] The water produced by the catalytic combustion of hydrogen and the water discharged from the fuel cell are passed into the liquid storage tank. The liquid storage tank is equipped with a liquid level gauge. There is a plunger-type booster water pump between the liquid storage tank and the ammonia storage tank. When the water level in the liquid storage tank is higher than the liquid level gauge, the water pump starts to pump the water in the liquid storage tank into the ammonia storage tank. As the liquid ammonia is continuously consumed, water can be continuously pumped into the ammonia storage tank. The consumption and production of the two are basically the same, which solves the problem of storage and low-energy discharge of waste liquid and waste gas under a long operating cycle.

[0068] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A deep-sea high-power ammonia hydrogen storage fuel cell energy supply system, characterized in that: It includes ammonia storage tanks, ammonia decomposition reactors, membrane separators, hydrogen fuel cells, buffer bottles and liquid oxygen tanks; among them, The ammonia decomposition reactor is a sleeve-type structure, including an inner tube and a jacket outside the inner tube, a catalyst layer is arranged on the inner wall of the jacket, and an igniter is arranged in the jacket, the air inlet end of the inner tube is connected to the ammonia storage tank, and the air outlet end of the inner tube is connected to the inlet of the membrane separator; The clean gas outlet of the membrane separator is connected to the hydrogen inlet of the hydrogen fuel cell, and the tail gas outlet on the inlet side of the membrane separator and the liquid oxygen tank are both connected to the inlet of the jacket; The outlet of the jacket is connected to the inlet of the buffer bottle through the gas-liquid separator and the outlet of the liquid oxygen tank, and the outlet of the buffer bottle is connected to the air inlet of the hydrogen fuel cell; An anti-corrosion elastic diaphragm is arranged on the cross section of the ammonia storage tank, which separates the ammonia storage tank into a first chamber and a second chamber. Liquid ammonia is stored in the first chamber, and the second chamber is connected to the drain port of the hydrogen fuel cell and the drain port of the gas-liquid separator.

2. The deep-sea high-power ammonia hydrogen storage fuel cell energy supply system according to claim 1 is characterized in that: A carbon adsorber is connected between the outlet of the membrane separator and the hydrogen inlet of the hydrogen fuel cell.

3. The deep-sea high-power ammonia hydrogen storage fuel cell energy supply system according to claim 1 is characterized in that: A liquid storage tank and a pump are connected between the second chamber and the liquid discharge port of the hydrogen fuel cell and the liquid discharge port of the gas-liquid separator.

4. The deep-sea high-power ammonia hydrogen storage fuel cell energy supply system according to claim 1 is characterized in that: It also includes a multi-stage gas storage tank, a micro-pump-type air pump is arranged between two adjacent gas storage tanks, the inlet of the multi-stage gas storage tank is connected to the gas outlet of the hydrogen fuel cell, and the outlet of the multi-stage gas storage tank is connected to the outside of the cabin.

5. The deep-sea high-power ammonia hydrogen storage fuel cell energy supply system according to claim 4 is characterized in that: The multi-stage gas storage tank is a three-stage gas storage tank, including a first gas storage tank, a second gas storage tank and a third gas storage tank.

6. A deep-sea high-power ammonia hydrogen storage fuel cell energy supply process based on the deep-sea high-power ammonia hydrogen storage fuel cell energy supply system according to any one of claims 1 to 5, characterized in that: The steps include: The liquid ammonia in the hydraulic tank is gasified and then transported to the ammonia decomposition reactor for catalytic pyrolysis to obtain a mixed gas of nitrogen, hydrogen and unreacted ammonia; The mixed gas is passed into a membrane separator for separation to obtain primary purified hydrogen and filtered tail gas. The primary purified hydrogen is subjected to secondary adsorption purification to obtain pure hydrogen, which is then passed into a hydrogen fuel cell to participate in the reaction; The tail gas separated by the membrane separator is introduced into the ammonia decomposition reactor for catalytic combustion, providing heat for the catalytic pyrolysis of ammonia; The wet nitrogen after catalytic combustion of the exhaust gas is mixed with the preheated oxygen to form simulated air, which is then introduced into the hydrogen fuel cell to participate in the reaction.

7. The deep-sea high-power ammonia hydrogen storage fuel cell energy supply process according to claim 6 is characterized in that: The temperature of catalytic pyrolysis of ammonia in the ammonia decomposition reactor is 550-650°C.

8. The deep-sea high-power ammonia hydrogen storage fuel cell energy supply process according to claim 6 is characterized in that: The method also includes the step of collecting water generated during the operation of the hydrogen fuel cell and transporting the water to the second chamber of the ammonia storage tank.

9. The deep-sea high-power ammonia hydrogen storage fuel cell energy supply process according to claim 6 is characterized in that: The method also includes the step of collecting the nitrogen generated during the operation of the hydrogen fuel cell and then initially pressurizing and discharging it.

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