High-temperature water electrolysis hydrogen production integrated thermal component

Abstract

The utility model relates to a high-temperature water electrolysis hydrogen production integrated heat part which comprises a cylindrical air heater, an air preheater, a steam generator, a steam preheater and a steam heater are sequentially and coaxially sleeved on the outer side of the circumference of the air heater, and the air preheater and the steam preheater are connected through an air tail gas connecting pipe. And a sleeve type integrated structure is formed, so that the heat transfer area among the components is large enough, and the heat exchange efficiency is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of energy engineering, in particular to an integrated thermal component for producing hydrogen by high-temperature water electrolysis. Background Art

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

[0003] High-temperature water electrolysis to produce hydrogen is based on a solid oxide electrolytic cell and requires the use of thermal components (components working at higher temperatures) to obtain high-temperature steam and air to produce hydrogen. Conventional thermal components are composed of multiple separate components in a high-temperature water electrolysis hydrogen production system. Affected by heat loss, it is difficult for the water preheater to completely evaporate liquid water, and a steam generator needs to be added. The steam generator uses an external heat source, which increases the energy consumption of the system. At the same time, the cold side inlet temperature of the steam recuperator is relatively high, and the heat produced by the electrolytic cell cannot be fully utilized, resulting in low system efficiency.

[0004] If the thermal components are arranged in an integrated manner, it is difficult to obtain an ideal heat exchange area due to the overly compact structure of components such as heaters and preheaters, resulting in unsatisfactory heat transfer efficiency of the thermal components. Utility Model Content

[0005] In order to solve the technical problems existing in the above-mentioned background technology, the utility model provides a high-temperature water electrolysis hydrogen production integrated thermal component, which, when used in conjunction with a solid oxide electrolysis cell, has the characteristics of small size, high integration, high power density, and convenient assembly, and can accurately adjust the flow rate and temperature to meet the needs of changing working conditions.

[0006] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0007] The utility model provides a high-temperature water electrolysis hydrogen production integrated heat component, comprising a cylindrical air heater, an air preheater, a steam generator, a steam preheater and a steam heater are coaxially sleeved on the circumferential outer side of the air heater in sequence, and the air preheater and the steam preheater are connected through an air tail gas connecting pipe.

[0008] Furthermore, the air heater is cylindrical, having an air heater inlet and an air heater outlet pipe, the air heater inlet is located outside the circumference of the cylinder, and the air heater outlet pipe is located on one of the end faces of the cylinder; the air heater inlet is connected to the air side outlet of the air preheater.

[0009] Furthermore, the air preheater has a hollow cylindrical structure, having an air cavity and an exhaust cavity which are connected together, the exhaust cavity is located inside the air cavity, one end face is provided with an air side inlet pipe and an air exhaust side outlet pipe, the other end face is provided with an air exhaust side inlet, and the inner side of the circumference is provided with an air side outlet; the air side inlet pipe and the air side outlet are connected to the air cavity, and the air exhaust side outlet pipe and the air exhaust side inlet are connected to the exhaust cavity.

[0010] Furthermore, the air side outlet of the air preheater is connected to the air heater inlet, and the air exhaust gas side inlet of the air preheater is connected to the steam preheater.

[0011] Furthermore, the steam generator has a hollow cylindrical structure, having an electrolytic gas production chamber and a mixed gas chamber which are sleeved together. The electrolytic gas production chamber is located inside the mixed gas chamber. A water inlet pipe, a hydrogen inlet pipe and an electrolytic gas production outlet pipe are provided on one end face of the steam generator, a steam side outlet of the steam generator is provided on the outer side of the circumference, and an electrolytic gas production inlet pipe is provided on the other end face; the electrolytic gas production outlet pipe and the electrolytic gas production inlet pipe are connected to the electrolytic gas production chamber, and the steam side outlet, water inlet pipe and hydrogen inlet pipe of the steam generator are connected to the mixed gas chamber.

[0012] Further, the steam side outlet of the steam generator is connected to the steam side inlet of the steam preheater.

[0013] Furthermore, the steam preheater has a hollow cylindrical structure, having an exhaust chamber and a steam chamber which are socketed together, and the exhaust chamber is located inside the steam chamber; an air exhaust side inlet pipe of the steam preheater is provided on one end face of the hollow cylindrical structure, and an air exhaust side outlet of the steam preheater is provided on the other end face, a steam side outlet of the steam preheater is provided on the outer side of the circumference, and a steam side inlet of the steam preheater is provided on the inner side of the circumference; the air exhaust side outlet and the air exhaust side inlet pipe of the steam preheater are both connected to the exhaust chamber, and the steam side inlet and the steam side outlet of the steam preheater are both connected to the steam chamber.

[0014] Furthermore, the steam side inlet of the steam preheater is connected to the steam side outlet of the steam generator, and the hydrogen-containing steam enters the steam preheater through the steam side inlet of the steam preheater.

[0015] Furthermore, the steam heater is in the shape of a hollow cylinder, with a steam outlet pipe at one end and a steam inlet at the inner side of the circumference.

[0016] Furthermore, the steam inlet of the steam heater is connected to the steam side outlet in the steam preheater, and the steam outlet pipe is used to connect to the solid oxide electrolysis cell.

[0017] Compared with the prior art, one or more of the above technical solutions have the following beneficial effects:

[0018] 1. With the air heater as the central axis, the other components are coaxially sleeved in sequence to form a sleeve structure. The structure is simple and easy to assemble. Each component is arranged in the space formed between the two components with the highest temperature, that is, the cylindrical air heater and the annular steam heater form a sleeve structure, and the other components are located in the annular space of the sleeve, so that each component exchanges heat through the wall surface, the heat exchange area is large, the heat transfer efficiency is high, and the exposed area can be reduced, reducing heat loss; the working fluid can be directly transmitted through the interface on the wall surface or through the connecting pipe on the end surface, which can make the transmission path of the working fluid shorter and help reduce pressure drop loss.

[0019] 2. For the mixture of hydrogen and water, after secondary heating with electrolysis gas and air exhaust as heat sources respectively, the steam heater located at the central axis is used to obtain mixed steam that meets the demand; for air, the residual heat after the heat release of the air exhaust is used for primary heating, and then the air heater is used to heat the air to obtain the air that meets the temperature required by the solid oxide electrolysis cell; it can form a multi-stage heat exchange utilization of the exhaust gas heat energy, reduce the additional heating power demand, and reduce the energy consumption of hydrogen production.

[0020] 3. The thermal components are highly integrated, small in size, and have high power density. The components are directly connected through the pipe openings on the outer shell, eliminating additional connecting pipes and helping to reduce pressure drop losses. The highly integrated structure can greatly reduce the exposed surface area of ​​the components, helping to reduce heat loss and improve heat exchange efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The drawings in the specification, which constitute a part of the present invention, are used to provide a further understanding of the present invention. The illustrative embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation on the present invention.

[0022] Figure 1 It is a schematic diagram of the structure of an integrated thermal component for high-temperature water electrolysis to produce hydrogen provided by one or more embodiments of the utility model;

[0023] Figure 2 It is a schematic diagram of the structure of an air heater in an integrated thermal component for high-temperature water electrolysis hydrogen production provided by one or more embodiments of the utility model;

[0024] Figure 3 It is a structural schematic diagram of an air preheater in a high-temperature water electrolysis hydrogen production integrated heat component provided by one or more embodiments of the utility model;

[0025] Figure 4 It is a schematic cross-sectional structure diagram of an air preheater in a high-temperature water electrolysis hydrogen production integrated heat component provided by one or more embodiments of the utility model;

[0026] Figure 5It is a structural schematic diagram of a steam generator in an integrated thermal component for producing hydrogen by high-temperature water electrolysis provided by one or more embodiments of the utility model;

[0027] Figure 6 It is a schematic cross-sectional structure diagram of a steam generator in a high-temperature water electrolysis hydrogen production integrated heat component provided by one or more embodiments of the utility model;

[0028] Figure 7 It is a structural schematic diagram of a steam preheater in a high-temperature water electrolysis hydrogen production integrated heat component provided by one or more embodiments of the utility model;

[0029] Figure 8 It is a schematic cross-sectional structure diagram of a steam preheater in a high-temperature water electrolysis hydrogen production integrated heat component provided by one or more embodiments of the utility model;

[0030] Fig. 9 It is a schematic diagram of the structure of a steam heater in an integrated thermal component for high-temperature water electrolysis hydrogen production provided by one or more embodiments of the utility model;

[0031] Fig.10 It is a schematic cross-sectional structure diagram of a steam heater of an integrated heat component for producing hydrogen by high-temperature water electrolysis provided by one or more embodiments of the utility model;

[0032] Fig.11 It is a schematic cross-sectional structure diagram of an integrated thermal component for producing hydrogen by high-temperature water electrolysis provided by one or more embodiments of the utility model;

[0033] Fig.12 It is a schematic diagram of the operating principle of the integrated thermal component for high-temperature water electrolysis to produce hydrogen provided by one or more embodiments of the utility model.

[0034] Figure 1 Middle: 1 air heater, 2 air preheater, 3 steam generator, 4 steam preheater, 5 steam heater, 6 air exhaust connecting pipe;

[0035] Figure 2 Middle: 7 air heater inlet, 8 air heater outlet pipe;

[0036] Figure 3-Figure 4 Middle: 9 air side inlet pipe, 10 air preheater air exhaust side outlet, 11 air side outlet, 12 air preheater air exhaust side inlet;

[0037] Figure 5-Figure 6 Middle: 13 steam generator steam side outlet, 14 water inlet pipe, 15 hydrogen inlet pipe, 16 electrolysis gas outlet pipe, 17 electrolysis gas inlet pipe;

[0038] Figure 7-Figure 8Middle: 18 steam preheater air exhaust gas side outlet, 19 steam preheater steam side outlet, 20 steam preheater air exhaust gas side inlet, 21 steam preheater steam side inlet;

[0039] Figure 9-10 Middle: 22 steam outlet pipe, 23 steam inlet. DETAILED DESCRIPTION

[0040] The utility model is further described below in conjunction with the accompanying drawings and embodiments.

[0041] It should be noted that the following detailed descriptions are exemplary and are intended to provide further explanation of the present invention. Unless otherwise specified, all technical and scientific terms used herein have the same meanings as those commonly understood by those skilled in the art to which the present invention belongs.

[0042] Terminology explanation:

[0043] Hot parts: Parts that operate at higher temperatures.

[0044] Integrated thermal component: Combining multiple components, such as multiple separate heat exchangers and heaters connected by pipes, etc., to form an integral component is called an integrated thermal component.

[0045] Hydrogen-containing steam: refers to a mixture of hydrogen and water vapor.

[0046] Electrolytic gas production: The product on the negative electrode side after the solid oxide electrolysis cell electrolyzes water, usually a mixture of a large amount of hydrogen and a small amount of water vapor.

[0047] Air exhaust: refers to the exhaust gas on the positive electrode side after the solid oxide electrolysis cell electrolyzes water, usually oxygen-enriched air.

[0048] Partition heat exchange: The cold and hot fluids exchange heat through a solid wall and do not mix with each other.

[0049] It should be noted that the terms used here are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the utility model. As used here, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprising" and / or "including" are used in this specification, it indicates the presence of features, steps, operations, devices, components and / or combinations thereof.

[0050] As introduced in the background technology, the conventional high-temperature water electrolysis hydrogen production system has multiple separate components as thermal components. Due to the influence of heat loss, it is difficult for the water preheater to completely evaporate the liquid water, and a steam generator needs to be added. The steam generator uses an external heat source, which increases the energy consumption of the system. At the same time, the cold side inlet temperature of the steam recuperator is relatively high, and the heat produced by the electrolyzer gas cannot be fully utilized, resulting in low system efficiency.

[0051] Therefore, the following embodiment provides a high-temperature water electrolysis hydrogen production integrated heat component, which includes an air heater, an air preheater, a steam generator, a steam preheater and a steam heater. When used in conjunction with a solid oxide electrolytic cell, it has the characteristics of small size, high integration, high power density, and convenient assembly, and can accurately adjust the flow rate and temperature to meet the needs of changing working conditions.

[0052] like Figure 1 As shown, the high-temperature water electrolysis hydrogen production integrated thermal component is composed of five sub-components, among which, from the center to the outside, are an air heater 1, an air preheater 2, a steam generator 3, a steam preheater 4 and a steam heater 5. The air preheater 2 and the steam preheater 4 are connected by an air exhaust connecting pipe 6.

[0053] The air heater 1 and the steam heater 5 are used as examples to illustrate the solution of this embodiment.

[0054] like Figure 2 As shown, the air heater 1 is cylindrical and includes an air heater inlet 7 and an air heater outlet pipe 8. The air heater inlet 7 is located outside the circumference of the cylinder, and the air heater outlet pipe 8 is located on one of the end faces of the cylinder.

[0055] When the high-temperature water electrolysis hydrogen production integrated heat component is coupled with equipment such as a solid oxide electrolytic cell for operation, the air preheated by the air preheater 2 enters the air heater 1 through the air heater inlet 6 and is further heated to the required temperature of the solid oxide electrolytic cell, and then enters the solid oxide electrolytic cell from the air heater outlet pipe 8.

[0056] like Figure 3-Figure 4 As shown, the air preheater 2 is a hollow cylindrical structure having an air cavity and an exhaust cavity which are connected together. The exhaust cavity is located inside the air cavity, one end face of which is provided with an air side inlet pipe 9 and an air exhaust side outlet pipe 10, the other end face is provided with an air exhaust side inlet 12, and an air side outlet 11 is provided on the inner side of the circumference.

[0057] The air side inlet pipe 8 and the air side outlet 11 are connected to the air cavity, and the air preheater air tail gas side outlet pipe 10 and the air preheater air tail gas side inlet 12 are connected to the tail gas cavity. The air side outlet 11 is connected to the air heater inlet 6, and the air preheater air tail gas side inlet 12 is connected to the steam preheater 4.

[0058] When the high-temperature water electrolysis hydrogen production integrated heat component is used in conjunction with the solid oxide electrolytic cell, in order to improve the system efficiency, the air exhaust gas discharged from the solid oxide electrolytic cell and the electrolysis gas are introduced into the heat component to reuse their thermal energy. After the air exhaust gas flows through the steam preheater 4, it enters the air preheater 2 from the air preheater air exhaust gas side inlet 12. At the same time, the air enters the air preheater 2 from the air side inlet pipe 9. The air exhaust gas and the air are subjected to a wall-to-wall heat exchange in the air preheater 2. After the heat exchange is completed, the air and the air exhaust gas are discharged from the air preheater 2 through the air side outlet 11 and the air preheater air exhaust gas side outlet pipe 10, respectively.

[0059] like Figure 5-Figure 6 As shown, the steam generator 3 is a hollow cylindrical structure, having an electrolytic gas production chamber and a mixed gas chamber which are connected together. The electrolytic gas production chamber is located inside the mixed gas chamber, and a water inlet pipe 14, a hydrogen inlet pipe 15 and an electrolytic gas production outlet pipe 16 are provided on one end face. A steam side outlet 13 of the steam generator is provided on the outer side of the circumference, and an electrolytic gas production inlet pipe 17 is provided on the other end face.

[0060] The electrolytic gas production outlet pipe 16 and the electrolytic gas production inlet pipe 17 are connected to the electrolytic gas production chamber, and the steam generator steam side outlet 13, the water inlet pipe 14 and the hydrogen inlet pipe 15 are connected to the mixed gas chamber.

[0061] The high-temperature electrolysis gas discharged from the solid oxide electrolysis cell enters the steam generator 3 through the electrolysis gas inlet pipe 17. At the same time, hydrogen enters the steam generator 3 through the hydrogen inlet pipe 15, and water enters the steam generator 3 through the water inlet pipe 14. The hydrogen and water are mixed and exchanged with the electrolysis gas in the steam generator 3. After the heat exchange is completed, the electrolysis gas is discharged from the high-temperature electrolysis water hydrogen production integrated heating component through the electrolysis gas outlet pipe 16, and the hydrogen-containing steam mixed with the water vapor generated after the water evaporates and the hydrogen is discharged from the steam generator 3 through the steam side outlet 13 of the steam generator and enters the steam preheater 4.

[0062] like Figure 7-Figure 8 As shown, the steam preheater 4 is a hollow cylindrical structure, having an exhaust chamber and a steam chamber that are sleeved together, the exhaust chamber is located inside the steam chamber, one end face is provided with a steam preheater air exhaust side inlet pipe 20, the other end face is provided with a steam preheater air exhaust side outlet 18, the outer side of the circumference is provided with a steam preheater steam side outlet 19, and the inner side of the circumference is provided with a steam preheater steam side inlet 21. The steam preheater air exhaust side outlet 18 and the air exhaust side inlet pipe 20 are in communication with the exhaust chamber, and the steam side inlet 21 and the steam side outlet 19 of the steam preheater are in communication with the steam chamber.

[0063] The steam preheater steam side inlet 21 is connected to the steam generator steam side outlet 13 in the steam generator 3 , and the hydrogen-containing steam enters the steam preheater 4 through the steam preheater steam side inlet 21 .

[0064] The exhaust air discharged from the solid oxide electrolytic cell enters the steam preheater 4 from the exhaust air side inlet pipe 20 of the steam preheater. The exhaust air and the hydrogen-containing steam are subjected to a wall-to-wall heat exchange in the steam preheater 4. After the heat exchange is completed, the exhaust air is discharged from the steam preheater 4 from the exhaust air side outlet 18 of the steam preheater, and goes to the air preheater 2 through the exhaust air side inlet 12 of the air preheater connected to the exhaust air side outlet 18 of the steam preheater. The hydrogen-containing steam is discharged from the steam preheater 4 from the steam side outlet 19 of the steam preheater, and goes to the steam heater 5.

[0065] like Figure 9-10 As shown, the steam heater 5 is a hollow cylinder, with a steam outlet pipe 22 at one end and a steam inlet 23 on the inner side of the circumference. The steam inlet 23 is connected to the steam preheater steam side outlet 19 in the steam preheater 4. The hydrogen-containing steam enters the steam heater 5 through the steam inlet 23, is heated by the core, and is discharged through the steam outlet pipe 22 to enter the solid oxide electrolytic cell.

[0066] like Figure 11-Figure 12 As shown, the components are tightly combined and interlocked, and the connection ports between the sub-components are directly connected. The sub-components can be sealed by sealing gaskets or welding to prevent gas leakage to the outside. The working process is as follows:

[0067] When the high-temperature water electrolysis hydrogen production integrated heat component is coupled with the solid oxide electrolysis cell for operation, the high-temperature electrolysis gas discharged from the solid oxide electrolysis cell enters the steam generator 3 through the electrolysis gas inlet pipe 17 .

[0068] Hydrogen enters the steam generator 3 through the hydrogen inlet pipe 15, and water enters the steam generator 3 through the water inlet pipe 14. The water flow rate and the hydrogen flow rate are dynamically adjusted according to the operating conditions of the integrated heat component. After the hydrogen and water are mixed, they are subjected to inter-wall heat exchange with the electrolytic gas in the steam generator 3.

[0069] After the heat exchange is completed, the electrolytic gas is discharged from the high-temperature water electrolysis hydrogen production integrated heating component through the electrolytic gas outlet pipe 16, and the hydrogen-containing steam formed by the water vapor generated after water evaporation and the mixture with hydrogen is discharged from the steam generator 3 through the steam generator steam side outlet pipe 13, reaches the steam preheater steam side inlet pipe 21 and enters the steam preheater 4.

[0070] The exhaust air discharged from the solid oxide electrolytic cell enters the steam preheater 4 from the exhaust air side inlet pipe 20 of the steam preheater. The exhaust air and the hydrogen-containing steam are subjected to a wall-type heat exchange in the steam preheater 4. After the heat exchange is completed, the exhaust air is discharged from the steam preheater 4 from the exhaust air side outlet 18 of the steam preheater to the air preheater 2.

[0071] The hydrogen-containing steam is discharged from the steam preheater 4 through the steam side outlet 19 of the steam preheater, enters the steam heater 5 through the steam inlet 23, and is heated to a temperature reaching the required operating value of the solid oxide electrolytic cell. Then, it is discharged through the steam outlet pipe 22 and passed into the solid oxide electrolytic cell.

[0072] At the same time, air enters the air preheater 2 from the air side inlet pipe 8, and its flow rate is dynamically adjusted according to the operating conditions of the integrated heat component. The exhaust air flows through the steam preheater 4 and enters the air preheater 2 from the exhaust air side inlet 12 of the air preheater. The exhaust air and the air undergo a wall-to-wall heat exchange in the air preheater 2.

[0073] After the heat exchange is completed, the air exhaust gas is discharged from the high-temperature water electrolysis hydrogen production integrated heating component through the air exhaust gas side outlet pipe 10 of the air preheater. The air is discharged from the air preheater 2 through the air side outlet 11, enters the air heater 1 through the air heater inlet 6, is further heated to the required temperature of the solid oxide electrolysis cell, and then passes into the solid oxide electrolysis cell from the air heater outlet pipe 8.

[0074] The thermal components of the above structure are highly integrated. During assembly, the sleeves are installed sequentially from the inside to the outside, and the installation is relatively convenient. The subcomponents are arranged in a sleeve-type structure with a small size and high power density. The connection paths between the subcomponents are short, and most of them are directly connected through interfaces on the outer shell, with only one exposed pipeline, which helps to reduce pressure drop losses. The sleeve-type structure can reduce the exposed surface area, which helps to reduce heat loss. The exhaust gas thermal energy is fully utilized through multi-stage heat exchange, which reduces the power demand for electric heating and reduces the energy consumption of hydrogen production.

[0075] The above description is only the preferred embodiment of the utility model, and is not intended to limit the utility model. For those skilled in the art, the utility model can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. A high-temperature water electrolysis hydrogen production integrated thermal component, characterized in that: The invention comprises a cylindrical air heater, wherein an air preheater, a steam generator, a steam preheater and a steam heater are coaxially sleeved on the outer circumference of the air heater in sequence, and the air preheater and the steam preheater are connected through an air tail gas connecting pipe.

2. A high-temperature water electrolysis hydrogen production integrated thermal component as claimed in claim 1, characterized in that: The air heater is cylindrical and has an air heater inlet and an air heater outlet pipe. The air heater inlet is located outside the circumference of the cylinder, and the air heater outlet pipe is located on one of the end faces of the cylinder; the air heater inlet is connected to the air side outlet of the air preheater.

3. A high-temperature water electrolysis hydrogen production integrated thermal component as claimed in claim 1, characterized in that: The air preheater has a hollow cylindrical structure, and has an air cavity and an exhaust gas cavity which are connected together. The exhaust gas cavity is located inside the air cavity, and an air side inlet pipe and an air exhaust gas side outlet pipe are provided on one end surface, an air exhaust gas side inlet is provided on the other end surface, and an air side outlet is provided on the inner side of the circumference; the air side inlet pipe and the air side outlet are connected to the air cavity, and the air exhaust gas side outlet pipe and the air exhaust gas side inlet are connected to the exhaust gas cavity.

4. A high-temperature water electrolysis hydrogen production integrated heat component as claimed in claim 3, characterized in that: The air side outlet of the air preheater is connected to the air heater inlet, and the air tail gas side inlet of the air preheater is connected to the steam preheater.

5. A high-temperature water electrolysis hydrogen production integrated thermal component as claimed in claim 1, characterized in that: The steam generator is of a hollow cylindrical structure, and comprises an electrolytic gas production chamber and a mixed gas chamber which are sleeved together. The electrolytic gas production chamber is located inside the mixed gas chamber. A water inlet pipe, a hydrogen inlet pipe and an electrolytic gas production outlet pipe are provided on one end face of the steam generator, a steam side outlet of the steam generator is provided on the outer side of the circumference, and an electrolytic gas production inlet pipe is provided on the other end face; the electrolytic gas production outlet pipe and the electrolytic gas production inlet pipe are in communication with the electrolytic gas production chamber, and the steam side outlet of the steam generator, the water inlet pipe and the hydrogen inlet pipe are in communication with the mixed gas chamber.

6. A high-temperature water electrolysis hydrogen production integrated heat component as claimed in claim 5, characterized in that: The steam side outlet of the steam generator is connected to the steam side inlet of the steam preheater.

7. A high-temperature water electrolysis hydrogen production integrated heat component as claimed in claim 1, characterized in that: The steam preheater is in a hollow cylindrical structure, having an exhaust chamber and a steam chamber which are sleeved together, and the exhaust chamber is located inside the steam chamber; an air exhaust side inlet pipe of the steam preheater is provided on one end face of the hollow cylindrical structure, and an air exhaust side outlet of the steam preheater is provided on the other end face, a steam side outlet of the steam preheater is provided on the outer side of the circumference, and a steam side inlet of the steam preheater is provided on the inner side of the circumference; the air exhaust side outlet and the air exhaust side inlet pipe of the steam preheater are both connected to the exhaust chamber, and the steam side inlet and the steam side outlet of the steam preheater are both connected to the steam chamber.

8. A high-temperature water electrolysis hydrogen production integrated heat component as claimed in claim 7, characterized in that: The steam side inlet of the steam preheater is connected to the steam side outlet of the steam generator, and the hydrogen-containing steam enters the steam preheater through the steam side inlet of the steam preheater.

9. The high-temperature water electrolysis hydrogen production integrated heat component according to claim 1, characterized in that: The steam heater is in the shape of a hollow cylinder, with a steam outlet pipe at one end and a steam inlet at the inner side of the circumference.

10. A high-temperature water electrolysis hydrogen production integrated heat component as claimed in claim 9, characterized in that: The steam inlet of the steam heater is connected to the steam side outlet in the steam preheater, and the steam outlet pipe is used to connect to the solid oxide electrolytic cell.

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