High-temperature solid hydrogen storage and SOEC coupling hydrogen production and storage integrated system and method

Abstract

The invention discloses a high-temperature solid hydrogen storage and SOEC coupling hydrogen production and storage integrated system and method. The system comprises a water supply device, and the end of the water supply device is connected with a suction device; one end of the recovery device is connected with the suction device, and the other end is connected with a reaction device; the SOEC electrolytic reactor is connected with the reaction device, the SOEC electrolytic reactor comprises an anode end and a cathode end, and the anode end is connected with the recovery device; one end of the air delivery device is mounted between the reaction device and the SOEC electrolytic reactor, and the other end of the air delivery device is connected with a hydrogen high-temperature heat recovery device; the first end of the hydrogen medium-temperature heat recoverer is connected with the hydrogen high-temperature heat recovery device, the second end of the hydrogen medium-temperature heat recoverer is connected with the reaction device, the third end of the hydrogen medium-temperature heat recoverer is connected with a condenser, the fourth end of the hydrogen medium-temperature heat recoverer is connected with a dryer, and the condenser is connected with the dryer. Medium-temperature and high-temperature heat energy released in the hydrogen storage process of the high-temperature metal hydride is recycled through the heat recycling device and used for producing high-temperature superheated steam needed by SOEC electrolysis, and the good heat and mass synergistic effect is achieved on the whole.

Description

Technical Field

[0001] The present invention belongs to the technical field of solid oxide electrolysis hydrogen production, and specifically relates to an integrated system and method for high-temperature solid-state hydrogen storage and SOEC coupled hydrogen production and storage. Background Art

[0002] Hydrogen energy is one of the important ways to absorb abandoned electricity from new energy, and it is also the key to reducing carbon emissions in fuels and raw materials. Since the electricity-to-hydrogen conversion efficiency of traditional alkaline electrolysis technology is only about 60%, the energy consumption of hydrogen production is high and the cost of green hydrogen is expensive. Solid oxide electrolysis technology (SOEC) reduces the Gibbs free energy of the water electrolysis reaction by high temperature, thereby reducing the demand for electricity. When the water vapor required for SOEC electrolysis is provided by waste heat recovery, the electricity-to-hydrogen conversion efficiency can reach more than 100%, which can greatly reduce the cost of green hydrogen preparation and provide an economic basis for the large-scale application of green hydrogen.

[0003] However, most new energy power stations do not have high-temperature waste heat that can be recycled, which results in the low energy consumption advantage of SOEC not being fully utilized. On the other hand, due to the volatility of new energy, green hydrogen production is intermittent and unstable, which does not match the downstream users' demand for a stable supply of hydrogen. Therefore, it is inevitable that hydrogen storage devices need to be configured downstream of green hydrogen production, and transportation issues also need to be considered for hydrogen use scenarios in other places. Summary of the invention

[0004] The purpose of the present invention is to provide an integrated system and method for high-temperature solid-state hydrogen storage and SOEC coupled hydrogen production and storage, so as to solve the problem that during the use of existing solid oxide electrolysis hydrogen production technology, due to the volatility of new energy, green hydrogen production has intermittent and unstable characteristics. In the scenario of hydrogen use in different places, the technical defects of transportation must also be considered.

[0005] In order to achieve the above object, the present invention adopts the following technical solutions: In a first aspect, a high-temperature solid-state hydrogen storage and SOEC coupled hydrogen production and storage integrated system is provided, characterized in that it includes: a water supply device, the end of which is connected to a suction device; A recovery device, one end of which is connected to the suction device and the other end of which is connected to a reaction device; A SOEC electrolytic stack connected to the reaction device, wherein the SOEC electrolytic stack includes an anode end and a cathode end, and the anode end is connected to the recovery device; An air delivery device, one end of which is installed between the reaction device and the SOEC electrolytic stack, and the other end of which is connected to a hydrogen high-temperature heat recovery device; A hydrogen medium-temperature heat recovery device, wherein the first end of the hydrogen medium-temperature heat recovery device is connected to the hydrogen high-temperature heat recovery device, the second end is connected to the reaction device, the third end is connected to a condenser, and the fourth end is connected to a dryer, and the condenser is connected to the dryer.

[0006] Further, the reaction device comprises a MgH2 reactor and a TiH2 reactor, the first end of the MgH2 reactor is connected to the TiH2 reactor, and the first end of the TiH2 reactor is connected to the SOEC electrolysis stack; The second end of the MgH2 reactor is connected to the hydrogen medium-temperature heat recovery device, and the second end of the TiH2 reactor is connected to the high-temperature heat recovery device; Among them, the MgH2 reactor is a hydrogen storage reactor filled with Mg-based metal hydrides, and the TiH2 reactor is a hydrogen storage reactor filled with Ti-based metal hydrides.

[0007] Furthermore, the condenser and the dryer are connected via a hydrogen compressor.

[0008] Furthermore, the cathode end of the SOEC electrolytic stack is connected to an air volume conveying device.

[0009] Furthermore, the water supply device is also connected to the condenser.

[0010] Furthermore, the suction device is a water pump.

[0011] Furthermore, the recovery device is an oxygen heat recovery device.

[0012] Furthermore, the air volume conveying device is a blower.

[0013] Furthermore, it also includes a pressure reducing control valve, which is arranged between the reaction device and the hydrogen high-temperature heat recovery device.

[0014] In a second aspect, a method for producing hydrogen by coupling high-temperature solid-state hydrogen storage with SOEC is provided, wherein the method is performed using the system as described above, and comprises: Using a water supply device to transport water working medium to the system pipeline, and processing the water working medium into a saturated water state; The saturated water is reacted into steam by a reaction device, so that the steam is mixed with part of the wet hydrogen discharged from the cathode end of the SOEC electrolysis stack to obtain hydrogen-containing high-temperature superheated steam; The hydrogen-containing high-temperature superheated steam is subjected to a hydrolysis reaction to produce hydrogen at the cathode of the SOEC electrolysis stack and oxygen at the anode of the SOEC electrolysis stack; The high-temperature wet hydrogen composed of the hydrogen and the superheated steam of the micro-reaction, a part of the high-temperature wet hydrogen is mixed with the main high-temperature superheated steam, and the other part continues to enter the suction device for circulation to obtain separated hydrogen; The separated hydrogen is dehydrated and stored through a reaction device.

[0015] Compared with the prior art, the present invention has the following beneficial effects: 1. Through the coupling integration of high-temperature metal hydrides and SOEC, high-temperature metal hydrides can achieve safe, high-density, and low-cost hydrogen storage. At the same time, the medium and high-temperature heat energy released during the high-temperature metal hydride hydrogen storage process is recovered through the heat recovery device, which is used to produce the high-temperature superheated steam (700-800℃) required for SOEC electrolysis, achieving a good overall thermal-mass synergy effect. In the absence of high-temperature waste heat, this system can reduce the power consumption of hydrogen production by 20%, and the hydrogen storage density can be 3-4 times higher than that of traditional 20MPa gaseous hydrogen storage tanks, with safer and cheaper off-site transportation costs.

[0016] 2. The MgH2 reactor and the TiH2 reactor will release heat energy at different temperatures during the hydrogen release process. The second end of the MgH2 reactor is connected to the hydrogen medium-temperature heat recovery device to recover the medium-temperature heat energy; and the second end of the TiH2 reactor is connected to the high-temperature heat recovery device to recover the high-temperature heat energy. This cascade utilization of heat energy improves the energy utilization efficiency of the overall system and reduces energy waste.

[0017] 3. The hydrogen compressor can compress the hydrogen treated in the condenser to increase its pressure and density, thereby facilitating the transmission and further processing of hydrogen, ensuring the efficient flow of hydrogen in the system and reducing energy loss. Through the compression of the hydrogen compressor, the hydrogen has a certain pressure and temperature condition before entering the dryer, which helps the dryer to better perform its dehumidification function. At the same time, the compressed hydrogen may stay longer in the dryer, thereby improving the drying efficiency.

[0018] 4. The air volume delivery device can adjust the pressure and flow of the gas, thereby maintaining the stable pressure at the cathode end of the SOEC electrolytic stack, which is essential for maintaining the normal operation of the electrolytic stack; at the same time, during the electrolysis process, the air volume delivery device can also affect the operating temperature of the SOEC electrolytic stack by adjusting the flow and temperature of the gas, keeping the electrolytic stack operating within the optimal operating temperature range, thereby improving its stability and life.

[0019] 5. By optimizing the control system of the water supply device, the cooling water can be precisely regulated and recycled, thereby reducing the waste of water resources. In addition, the condenser adopts latent heat exchange, which improves the heat exchange efficiency and further saves the water required for the operation of the equipment. This water-saving and energy-saving feature not only helps to reduce operating costs, but also meets the current national policy requirements for environmental protection and energy conservation.

[0020] 6. The addition of the water pump enhances the stability of the system and ensures that the pressure and flow of the liquid inside the system remain within a reasonable range, thereby avoiding fluctuations or failures in the system.

[0021] 7. Recycling and utilizing oxygen waste heat not only helps save energy, but also reduces greenhouse gas emissions. The use of oxygen heat recovery devices can effectively reduce the emission of these heat energies, thereby reducing the impact on the environment. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for use in the embodiments are briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without creative work.

[0023] Figure 1 Schematic diagram of the integrated system of high-temperature solid-state hydrogen storage and SOEC coupled hydrogen production and storage provided by the present invention; Figure 2 A flow chart of the method for producing hydrogen by coupling high-temperature solid-state hydrogen storage with SOEC provided by the present invention; In the figure: 1. Water supply device; 2. Suction device; 3. Recovery device; 4. MgH2 reactor; 5. TiH2 reactor; 6. SOEC electrolytic stack; 7. Air volume conveying device; 8. Hydrogen high-temperature heat recovery device; 9. Hydrogen medium-temperature heat recovery device; 10. Condenser; 11. Hydrogen compressor; 12. Dryer; 13. Pressure reducing control valve. DETAILED DESCRIPTION

[0024] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Generally, the components of the embodiments of the present invention described and shown in the drawings here can be arranged and designed in various different configurations.

[0025] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the invention claimed for protection, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0026] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0027] In the description of the embodiments of the present invention, it should be noted that if the terms "upper", "lower", "horizontal", "inner", etc. indicate an orientation or positional relationship based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship in which the product of the invention is usually placed when in use, it is only for the convenience of describing the present invention and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention. In addition, the terms "first", "second", etc. are only used to distinguish the description, and cannot be understood as indicating or implying relative importance.

[0028] In addition, if the term "horizontal" appears, it does not mean that the component is required to be absolutely horizontal, but can be slightly tilted. For example, "horizontal" only means that its direction is more horizontal than "vertical", which does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0029] In the description of the embodiments of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connect" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal connection of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0030] Hydrogen energy is one of the important ways to absorb abandoned electricity from new energy, and it is also the key to reducing carbon emissions in fuels and raw materials. Since the electricity-to-hydrogen conversion efficiency of traditional alkaline electrolysis technology is only about 60%, the energy consumption of hydrogen production is high and the cost of green hydrogen is expensive. Solid oxide electrolysis technology (SOEC) reduces the Gibbs free energy of the water electrolysis reaction by high temperature, thereby reducing the demand for electricity. When the water vapor required for SOEC electrolysis is provided by waste heat recovery, the electricity-to-hydrogen conversion efficiency can reach more than 100%, which can greatly reduce the cost of green hydrogen preparation and provide an economic basis for the large-scale application of green hydrogen.

[0031] However, most new energy power stations do not have high-temperature waste heat that can be recycled, which results in the low energy consumption advantage of SOEC not being fully utilized. On the other hand, due to the volatility of new energy, green hydrogen production is intermittent and unstable, which does not match the downstream users' demand for a stable supply of hydrogen. Therefore, it is inevitable that hydrogen storage devices need to be configured downstream of green hydrogen production, and transportation issues also need to be considered for hydrogen use scenarios in other places.

[0032] In order to solve the above-mentioned defects of the prior art, the inventor provides an integrated system and method for high-temperature solid-state hydrogen storage and SOEC coupling hydrogen production and storage.

[0033] The present invention is further described in detail below in conjunction with the accompanying drawings: like Figure 1 As shown, in the first aspect, an embodiment of the present invention provides an integrated system of high-temperature solid-state hydrogen storage and SOEC coupled hydrogen production and storage, including a water supply device 1, the end of the water supply device 1 is connected to a suction device 2, a recovery device 3, one end is connected to the suction device 2, and the other end is connected to a reaction device; a SOEC electrolytic stack 6 is connected to the reaction device, the SOEC electrolytic stack 6 includes an anode end and a cathode end, the anode end is connected to the recovery device 3, and the cathode end is connected to an air volume conveying device 7; one end of the air volume conveying device 7 is installed between the reaction device and the SOEC electrolytic stack 6, and the other end is connected to a hydrogen high-temperature heat recovery device 8; a first end of a hydrogen medium-temperature heat recovery device 9 is connected to the hydrogen high-temperature heat recovery device 8, a second end is connected to the reaction device, a third end is connected to a condenser 10, and a fourth end is connected to a dryer 12, and the condenser 10 is connected to the dryer 12. During the use of the system, the high-temperature metal hydride is coupled and integrated with SOEC to achieve safe, high-density, and low-cost hydrogen storage. At the same time, the medium and high-temperature heat energy released during the high-temperature metal hydride hydrogen storage process is recovered through the heat recovery device, and is used to produce the high-temperature superheated steam (700-800°C) required for SOEC electrolysis, achieving a good overall thermal and mass synergy effect. In the absence of high-temperature waste heat, this system can reduce the power consumption of hydrogen production by 20%, and the hydrogen storage density can be 3-4 times higher than that of traditional 20MPa gaseous hydrogen storage tanks, with safer and cheaper off-site transportation costs. Figure 1As shown, the reaction device includes a MgH2 reactor 4 and a TiH2 reactor 5, wherein the MgH2 reactor 4 is a hydrogen storage reactor filled with Mg-based metal hydrides, and the TiH2 reactor 5 is a hydrogen storage reactor filled with Ti-based metal hydrides; the first end of the MgH2 reactor 4 is connected to the TiH2 reactor 5, the first end of the TiH2 reactor 5 is connected to the SOEC electrolysis stack 6, the second end of the MgH2 reactor 4 is connected to the hydrogen medium-temperature heat recovery device 9, and the second end of the TiH2 reactor 5 is connected to the high-temperature heat recovery device 8. The MgH2 reactor 4 and the TiH2 reactor 5 will release heat energy at different temperatures during the hydrogen release process. The second end of the MgH2 reactor 4 is connected to the hydrogen medium-temperature heat recovery device 9 to recover medium-temperature heat energy; and the second end of the TiH2 reactor 5 is connected to the high-temperature heat recovery device 8 to recover high-temperature heat energy. This cascade utilization of heat energy improves the energy utilization efficiency of the overall system and reduces energy waste. Figure 1 As shown, in this scheme, the condenser 10 and the dryer 12 are connected by a hydrogen compressor 11. The hydrogen compressor 11 can compress the hydrogen treated in the condenser 10 to increase its pressure and density, thereby facilitating the transmission and further processing of hydrogen, ensuring the efficient flow of hydrogen in the system, and reducing energy loss. Through the compression of the hydrogen compressor 11, the hydrogen has certain pressure and temperature conditions before entering the dryer 12, which helps the dryer 12 to better play its dehumidification function. At the same time, the residence time of the compressed hydrogen in the dryer 12 may be longer, thereby improving the drying efficiency. Secondly, the hydrogen compressor 11 can adjust the pressure of the hydrogen to keep it within a relatively stable range. During the compression process, the hydrogen compressor 11 will also heat the hydrogen to a certain extent, which helps to keep the temperature of the hydrogen in the system stable and prevent condensation or freezing caused by too low temperature.

[0034] like Figure 1 As shown, the water supply device 1 is also connected to the condenser 10, and the water supply device 1 can stably and continuously provide cooling water to the condenser 10, ensuring that the heat exchange process inside the condenser 10 can proceed smoothly, so that the condenser 10 can quickly convert high-temperature gas or steam into liquid, thereby improving the condensation efficiency, which not only helps to improve the performance of the entire system, but also reduces energy waste. In this system, the suction device 2 is a water pump, the recovery device 3 is an oxygen heat recovery device, and the air volume delivery device 7 is a blower.

[0035] like Figure 1As shown, the system also includes a pressure reducing control valve 13, which is arranged between the reaction device and the hydrogen high-temperature heat recovery device 8. The traditional SOEC electrolytic stack 6 adopts the method of introducing excess air into the anode to adjust the temperature gradient and other properties during the operation of the stack to avoid excessive thermal stress affecting the life of the stack. Excessive air will cause a large pressure loss during the operation process, and the actual blast energy consumption can reach 10%. In this scheme, the temperature of the superheated steam at the outlet of the TiH2 reactor 5 is adjusted by adjusting the inlet pressure of the TiH2 reactor 5, which has a higher temperature sensitivity than controlling the excess air flow; by configuring the pressure reducing control valve 12, the inlet hydrogen pressure of the TiH2 reactor 5 can be controlled to change between 1-2MPa, and the outlet superheated steam temperature can be controlled to change rapidly between 700-800℃, so as to adjust the internal temperature gradient of the SOEC electrolytic stack to meet the requirements of stable operation.

[0036] In a second aspect, an embodiment of the present invention provides a method for producing hydrogen by coupling high-temperature solid-state hydrogen storage with SOEC, wherein the method is carried out using the system as described above. Figure 2 As shown, including: S101. Use a water supply device to transport water working medium to the system pipeline, and process the water working medium into a saturated water state; illustratively, normal temperature water 1 enters the system pipeline through a suction device 2, and is first heated to a saturated water state by an oxygen heat recovery device 3 (during the electrolysis process of the SOEC electrolysis stack 6, the anode produces high-temperature oxygen, about 700-800°C).

[0037] S102. The saturated water is reacted into steam through a reaction device, so that the steam is mixed with part of the wet hydrogen discharged from the cathode end of the SOEC electrolytic stack to obtain hydrogen-containing high-temperature superheated steam; illustratively, the saturated water enters the MgH2 reactor 4 and is heated to superheated steam at about 400°C (the reactor releases 300-400°C high-temperature heat during the hydrogen storage process), and the superheated steam enters the TiH2 reactor 5 and is heated to 700-800°C high-temperature superheated steam, and then is mixed with part of the wet hydrogen discharged from the SOEC cathode, so that the high-temperature water vapor entering the SOEC cathode contains a small amount of hydrogen, thereby avoiding high-temperature oxidation of the cathode nickel and obtaining hydrogen-containing high-temperature superheated steam.

[0038] S103, subjecting the hydrogen-containing high-temperature superheated steam to a hydrolysis reaction to generate hydrogen at the cathode of the SOEC electrolysis stack and oxygen at the anode of the SOEC electrolysis stack; illustratively, the hydrogen-containing high-temperature superheated steam is transported to the cathode of the SOEC electrolysis stack 6 to generate hydrogen at the cathode and oxygen at the anode.

[0039] S104. Mix a portion of the high-temperature wet hydrogen composed of the hydrogen and the superheated steam of the micro-reaction with the main high-temperature superheated steam, and the other portion continues to enter the suction device for circulation to obtain separated hydrogen; illustratively, the high-temperature wet hydrogen composed of the hydrogen produced at the cathode and the unreacted superheated steam is divided into two branches; a small portion passes through the blower 7 and is mixed with the main high-temperature superheated steam at the outlet of the TiH2 reactor 5; the main high-temperature wet hydrogen passes through the hydrogen high-temperature heat recovery device 8 and the hydrogen medium-temperature heat recovery device 9, is cooled to about 130°C, and enters the condenser 10, the water is condensed and separated, and returns to be mixed with the normal temperature water 1 and continues to enter the water pump 2 for circulation to obtain separated hydrogen.

[0040] S105, dehydrating the separated hydrogen and storing it through the reaction device; illustratively, the separated hydrogen is pressurized to about 2MPa by the compressor 11 (pressurization also helps to further reduce the water content in the hydrogen), and then enters the dryer 12 for further dehydration to become dry hydrogen. The dry hydrogen enters the hydrogen medium temperature heat recovery device 9 and is heated to 300-400°C, and then is divided into two branches; one part enters the MgH2 reactor 4 to participate in the hydrogen absorption reaction and is stored; the other part enters the hydrogen high temperature heat recovery device 8 to be further heated to 650-750°C, and then enters the TiH2 reactor 5 to participate in the hydrogen absorption reaction and is stored. At this point, the MgH2 reactor 4 and the TiH2 reactor 5 release medium and high temperature heat energy to produce 700-800°C high temperature superheated steam in the process of absorbing and storing the hydrogen produced by the SOEC electrolytic stack 6, which can greatly reduce the power consumption of the SOEC hydrogen production process. In the specific implementation process, the hydrogen storage capacity ratio of the TiH2 reactor 5 and the MgH2 reactor 4 is recommended to be 1:14, which can ensure that the hydrogen absorption amount matches the thermal energy required for steam production.

[0041] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention rather than to limit its protection scope. Although the present invention has been described in detail with reference to the above embodiments, ordinary technicians in the field should understand that after reading the present invention, those skilled in the art can still make various changes, modifications or equivalent substitutions to the specific implementation methods of the invention, but these changes, modifications or equivalent substitutions are all within the protection scope of the pending claims of the invention.

Claims

1. A high-temperature solid-state hydrogen storage and SOEC coupled hydrogen production and storage integrated system, characterized in that: include: A water supply device (1), an end of which is connected to a suction device (2); A recovery device (3), one end of which is connected to the suction device (2) and the other end of which is connected to a reaction device; A SOEC electrolytic stack (6) connected to the reaction device, wherein the SOEC electrolytic stack (6) comprises an anode end and a cathode end, and the anode end is connected to the recovery device (3); An air volume conveying device (7), one end of which is installed between the reaction device and the SOEC electrolytic stack (6), and the other end of which is connected to a hydrogen high-temperature heat recovery device (8); A hydrogen medium temperature heat recovery device (9), wherein a first end of the hydrogen medium temperature heat recovery device (9) is connected to the hydrogen high temperature heat recovery device (8), a second end is connected to the reaction device, a third end is connected to a condenser (10), and a fourth end is connected to a dryer (12), wherein the condenser (10) is connected to the dryer (12).

2. The high-temperature solid-state hydrogen storage and SOEC coupled hydrogen production and storage integrated system according to claim 1 is characterized in that: The reaction device comprises a MgH2 reactor (4) and a TiH2 reactor (5), wherein a first end of the MgH2 reactor (4) is connected to the TiH2 reactor (5), and a first end of the TiH2 reactor (5) is connected to a SOEC electrolytic stack (6); The second end of the MgH2 reactor (4) is connected to a hydrogen medium-temperature heat recovery device (9), and the second end of the TiH2 reactor (5) is connected to a high-temperature heat recovery device (8); The MgH2 reactor (4) is a hydrogen storage reactor filled with Mg-based metal hydride, and the TiH2 reactor (5) is a hydrogen storage reactor filled with Ti-based metal hydride.

3. The high-temperature solid-state hydrogen storage and SOEC coupled hydrogen production and storage integrated system according to claim 1 is characterized in that: The condenser (10) and the dryer (12) are connected via a hydrogen compressor (11).

4. The high-temperature solid-state hydrogen storage and SOEC coupled hydrogen production and storage integrated system according to claim 1 is characterized in that: The cathode end of the SOEC electrolytic stack (6) is connected to the air volume conveying device (7).

5. The high-temperature solid-state hydrogen storage and SOEC coupled hydrogen production and storage integrated system according to claim 1 is characterized in that: The water supply device (1) is also connected to the condenser (10).

6. The high-temperature solid-state hydrogen storage and SOEC coupled hydrogen production and storage integrated system according to claim 1, characterized in that: The suction device (2) is a water pump.

7. The high-temperature solid-state hydrogen storage and SOEC coupled hydrogen production and storage integrated system according to claim 1 is characterized in that: The recovery device (3) is an oxygen heat recovery device.

8. The high-temperature solid-state hydrogen storage and SOEC coupled hydrogen production and storage integrated system according to claim 1, characterized in that: The air volume conveying device (7) is a blower.

9. The high-temperature solid-state hydrogen storage and SOEC coupled hydrogen production and storage integrated system according to claim 1, characterized in that: It also includes a pressure reducing control valve (13), wherein the pressure reducing control valve (13) is arranged between the reaction device and the hydrogen high-temperature heat recovery device (8).

10. A method for producing hydrogen by coupling high-temperature solid-state hydrogen storage with SOEC, characterized in that: The method is carried out using the system according to any one of claims 1 to 9, comprising: Using a water supply device to transport water working medium to the system pipeline, and processing the water working medium into a saturated water state; The saturated water is reacted into steam by a reaction device, so that the steam is mixed with part of the wet hydrogen discharged from the cathode end of the SOEC electrolysis stack to obtain hydrogen-containing high-temperature superheated steam; The hydrogen-containing high-temperature superheated steam is subjected to a hydrolysis reaction to produce hydrogen at the cathode of the SOEC electrolysis stack and oxygen at the anode of the SOEC electrolysis stack; The high-temperature wet hydrogen composed of the hydrogen and the superheated steam of the micro-reaction, a part of the high-temperature wet hydrogen is mixed with the main high-temperature superheated steam, and the other part continues to enter the suction device for circulation to obtain separated hydrogen; The separated hydrogen is dehydrated and stored through a reaction device.

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