An integrated system and method for high-temperature solid-state hydrogen storage and SOEC coupled hydrogen production and storage

Abstract

The present invention discloses an integrated system and method for high-temperature solid-state hydrogen storage coupled with SOEC for hydrogen production and storage, comprising 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, the SOEC electrolytic stack including an anode terminal and a cathode terminal, the anode terminal being connected to the recovery device; an air volume conveying 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, the first end of the hydrogen medium-temperature heat recovery device being connected to the hydrogen high-temperature heat recovery device, the second end being connected to the reaction device, the third end being connected to a condenser, the fourth end being connected to a dryer, and the condenser being connected to the dryer. The medium- and high-temperature heat energy released during the high-temperature metal hydride hydrogen storage process is recovered by the heat recovery device and used to produce high-temperature superheated steam required for SOEC electrolysis, thereby achieving a good overall heat-mass synergy effect.

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 an important way to absorb waste electricity from new energy sources and a key factor in reducing carbon emissions from fuels and raw materials. Because traditional alkaline electrolysis technology has an electricity-to-hydrogen conversion efficiency of only around 60%, hydrogen production consumes a lot of energy and is expensive. Solid oxide electrolysis cell (SOEC) technology reduces the Gibbs free energy of the water electrolysis reaction by using high temperatures, thereby reducing electricity demand. When the steam required for SOEC electrolysis is provided by waste heat recovery, the electricity-to-hydrogen conversion efficiency can reach over 100%, significantly reducing the cost of green hydrogen production and providing an economic basis for its widespread application.

[0003] However, most renewable energy power plants lack high-temperature waste heat for recycling, hindering the full utilization of SOEC's low energy consumption advantage. Furthermore, the volatility of renewable energy sources results in intermittent and unstable green hydrogen production, which is inconsistent with downstream users' demand for a stable hydrogen supply. Therefore, downstream hydrogen production inevitably requires hydrogen storage devices, and transportation issues must also be considered for remote hydrogen use scenarios. 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:

[0006] In the first aspect, a high-temperature solid-state hydrogen storage and SOEC coupled hydrogen production and storage integrated system is provided, comprising:

[0007] a water supply device, the end of which is connected to a suction device;

[0008] a recovery device, one end of which is connected to the suction device and the other end of which is connected to the reaction device;

[0009] A SOEC electrolytic stack connected to the reaction device, the SOEC electrolytic stack comprising an anode end and a cathode end, the anode end being connected to the recovery device;

[0010] An air delivery device, one end of which is installed between the reaction device and the SOEC electrolysis stack, and the other end is connected to a hydrogen high-temperature heat recovery device;

[0011] 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, and the second end is connected to the reaction device; wherein the reaction device is a solid hydrogen storage reactor, the third end is connected to a condenser, the fourth end is connected to a dryer, and the condenser is connected to the dryer.

[0012] Furthermore, the reaction device includes 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;

[0013] 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 hydrogen high-temperature heat recovery device;

[0014] 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.

[0015] Furthermore, the condenser and the dryer are connected via a hydrogen compressor.

[0016] Furthermore, the cathode end of the SOEC electrolytic stack is connected to an air volume conveying device.

[0017] Furthermore, the water supply device is also connected to the condenser.

[0018] Furthermore, the suction device is a water pump.

[0019] Furthermore, the recovery device is an oxygen heat recovery device.

[0020] Furthermore, the air volume delivery device is a blower.

[0021] Furthermore, it also includes a pressure reducing control valve, which is arranged between the reaction device and the hydrogen high-temperature heat recovery device.

[0022] 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 described above, comprising:

[0023] Using a water supply device to deliver water working medium to the system pipeline, and processing the water working medium into a saturated water state;

[0024] The saturated water is reacted into steam by a reaction device, so that the steam is mixed with a portion of the wet hydrogen discharged from the cathode end of the SOEC electrolysis stack to obtain hydrogen-containing high-temperature superheated steam;

[0025] The hydrogen-containing high-temperature superheated steam is subjected 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;

[0026] The high-temperature wet hydrogen composed of the hydrogen and the superheated steam of the micro-reaction 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;

[0027] The separated hydrogen is dehydrated and stored through a reaction device.

[0028] Compared with the prior art, the present invention has the following beneficial effects:

[0029] 1. By coupling and integrating high-temperature metal hydrides with SOEC, the system enables safe, high-density, and low-cost hydrogen storage. Simultaneously, a heat recovery device recycles the medium- and high-temperature heat released during the high-temperature metal hydride hydrogen storage process to produce the high-temperature superheated steam (700-800°C) required for SOEC electrolysis, achieving excellent heat-mass synergy. In scenarios without high-temperature waste heat, this system can reduce hydrogen production power consumption by 20%, and achieve a hydrogen storage density 3-4 times higher than traditional 20MPa gaseous hydrogen storage tanks, making transportation to other locations safer and more affordable.

[0030] 2. The MgH2 reactor and the TiH2 reactor 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 medium-temperature heat energy; while the second end of the TiH2 reactor is connected to the high-temperature heat recovery device 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.

[0031] 3. The hydrogen compressor compresses the treated hydrogen in the condenser, increasing its pressure and density. This facilitates its transmission and further processing, ensures efficient hydrogen flow within the system, and reduces energy loss. The hydrogen compressor's compression ensures that the hydrogen reaches a certain pressure and temperature before entering the dryer, helping the dryer to better perform its dehumidification function. Furthermore, the compressed hydrogen can remain in the dryer longer, improving drying efficiency.

[0032] 4. The air volume delivery device can adjust the pressure and flow of the gas, thereby maintaining the pressure inside the cathode end of the SOEC electrolytic stack stable, which is crucial to 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.

[0033] 5. By optimizing the control system of the water supply device, precise regulation and recycling of cooling water can be achieved, thereby reducing water waste. In addition, the condenser adopts latent heat exchange, which improves heat exchange efficiency and further saves water demand for equipment operation.

[0034] 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.

[0035] 7. Recycling and utilizing oxygen waste heat not only helps to save energy, but also reduces greenhouse gas emissions. Oxygen heat recovery not only causes energy waste, but also exacerbates the greenhouse effect. The application 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

[0036] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for use in the embodiments. It should be understood that the following drawings only illustrate certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without paying any creative work.

[0037] 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;

[0038] Figure 2 Flow chart of the method for producing hydrogen by coupling high-temperature solid-state hydrogen storage with SOEC provided by the present invention;

[0039] In the figure: 1. Water supply device; 2. Suction device; 3. Recovery device; 4. MgH2 reactor; 5. TiH2 reactor; 6. SOEC electrolysis 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

[0040] To make the objectives, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions of the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only 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 herein can be arranged and designed in various different configurations.

[0041] 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 as claimed, but rather merely represents selected embodiments of the present invention. All other embodiments derived by persons of ordinary skill in the art based on the embodiments of the present invention without creative effort shall fall within the scope of protection of the present invention.

[0042] 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, it does not need to be further defined or explained in subsequent drawings.

[0043] In the description of the embodiments of the present invention, it should be noted that if the terms "upper," "lower," "horizontal," "inner," etc. appear, the orientation or positional relationship indicated is based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship in which the inventive product is typically placed when in use. These terms are merely for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or component referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on the present invention. In addition, the terms "first," "second," etc. are used only to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0044] In addition, if the term "horizontal" appears, it does not mean that the component must be absolutely horizontal, but can be slightly tilted. For example, "horizontal" only means that its direction is more horizontal than "vertical", and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0045] In the description of the embodiments of the present invention, it should be noted that, unless otherwise expressly specified or limited, the terms "disposed," "installed," "connected," and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections or electrical connections; they can refer to direct connections or indirect connections through an intermediate medium; and they can refer to internal connections between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on specific circumstances.

[0046] Hydrogen energy is an important way to absorb waste electricity from new energy sources and a key factor in reducing carbon emissions from fuels and raw materials. Because traditional alkaline electrolysis technology has an electricity-to-hydrogen conversion efficiency of only around 60%, hydrogen production consumes a lot of energy and is expensive. Solid oxide electrolysis cell (SOEC) technology reduces the Gibbs free energy of the water electrolysis reaction by using high temperatures, thereby reducing electricity demand. When the steam required for SOEC electrolysis is provided by waste heat recovery, the electricity-to-hydrogen conversion efficiency can reach over 100%, significantly reducing the cost of green hydrogen production and providing an economic basis for its widespread application.

[0047] However, most renewable energy power plants lack high-temperature waste heat for recycling, hindering the full utilization of SOEC's low energy consumption advantage. Furthermore, the volatility of renewable energy sources results in intermittent and unstable green hydrogen production, which is inconsistent with downstream users' demand for a stable hydrogen supply. Therefore, downstream hydrogen production inevitably requires hydrogen storage devices, and transportation issues must also be considered for remote hydrogen use scenarios.

[0048] In order to solve the above-mentioned defects in the prior art, the inventors provide an integrated system and method for high-temperature solid-state hydrogen storage and SOEC coupled hydrogen production and storage.

[0049] The present invention is described in further detail below with reference to the accompanying drawings:

[0050] like Figure 1As 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, high-temperature metal hydride is coupled and integrated with SOEC to achieve safe, high-density, and low-cost hydrogen storage of high-temperature metal hydride. 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 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 scenarios without 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 1 As 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 hydrogen 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, which can recover medium-temperature heat energy; and the second end of the TiH2 reactor 5 is connected to the hydrogen high-temperature heat recovery device 8, which can 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 1As shown, in this solution, the condenser 10 and the dryer 12 are connected via 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 the hydrogen, ensuring the efficient flow of hydrogen in the system, and reducing energy loss. Through the compression effect of the hydrogen compressor 11, the hydrogen has already met certain pressure and temperature conditions before entering the dryer 12, which helps the dryer 12 to better perform 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 so that it remains 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 due to excessively low temperatures.

[0051] like Figure 1 As shown, water supply device 1 is also connected to condenser 10. Water supply device 1 can stably and continuously provide cooling water to condenser 10, ensuring the smooth heat exchange process within condenser 10. This allows condenser 10 to quickly convert high-temperature gas or steam into liquid, thereby improving condensation efficiency. This not only helps improve the performance of the entire system but also reduces energy waste. In this system, suction device 2 is a water pump, recovery device 3 is an oxygen heat recovery device, and air delivery device 7 is a blower.

[0052] like Figure 1 As 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 performance of the stack during operation to avoid excessive thermal stress affecting the life of the stack. Excess air will cause a large pressure loss during operation, and the actual air blowing energy consumption can reach 10%. In this solution, 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 13, 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 6 to meet the requirements of stable operation.

[0053] In the second aspect, the 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:

[0054] 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. For example, room temperature water enters the system pipeline through the suction device 2 and is first heated to a saturated water state by an oxygen heat recovery device (during the electrolysis process of the SOEC electrolysis stack 6, the anode produces high-temperature oxygen, about 700-800°C).

[0055] 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 preventing the cathode nickel from being oxidized by high temperature, and obtaining hydrogen-containing high-temperature superheated steam.

[0056] S103. The hydrogen-containing high-temperature superheated steam is subjected 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 undergo a hydrolysis reaction to generate hydrogen at the cathode and oxygen at the anode.

[0057] S104. The high-temperature wet hydrogen composed of the hydrogen and the superheated steam of the micro-reaction 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; illustratively, the high-temperature wet hydrogen composed of the hydrogen produced by the cathode and the unreacted superheated steam is divided into two branches; a small part passes through the air volume conveying device 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 normal temperature water and continues to enter the water pump for circulation to obtain separated hydrogen.

[0058] S105: Dehydrate the separated hydrogen and store it in a reaction unit. For example, the separated hydrogen is pressurized to approximately 2 MPa by a hydrogen compressor 11 (the increased pressure also helps further reduce the water content in the hydrogen). It then enters a dryer 12 for further dehydration, producing dry hydrogen. The dry hydrogen enters a hydrogen medium-temperature heat recovery unit 9, where it is heated to 300-400°C. It is then split into two streams: one stream enters the MgH2 reactor 4 to participate in a hydrogen absorption reaction and be stored; the other stream enters a hydrogen high-temperature heat recovery unit 8, where it is further heated to 650-750°C. It then enters the TiH2 reactor 5 to participate in a hydrogen absorption reaction and be stored. Thus, while absorbing and storing hydrogen produced by the SOEC electrolyzer 6, the MgH2 reactor 4 and the TiH2 reactor 5 release medium- and high-temperature heat energy, which is used to produce superheated steam at 700-800°C, significantly reducing the electrical energy consumption of the SOEC hydrogen production process. During the specific implementation, 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.

[0059] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit its scope of protection. 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 may 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 scope of protection 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) is 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 delivery device (7), one end of which is installed between the reaction device and the SOEC electrolysis 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 the first end of the hydrogen medium-temperature heat recovery device (9) is connected to the hydrogen high-temperature heat recovery device (8), and the second end is connected to the reaction device; wherein the reaction device is a solid hydrogen storage reactor, the third end is connected to the condenser (10), and the fourth end is connected to the dryer (12), and 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 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 hydrogen 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 is 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), which 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 performed using the system according to any one of claims 1 to 9, comprising: Using a water supply device to deliver 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 a portion 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 generate 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 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.

Images