A solid oxide fuel cell power generation system

Abstract

The present invention discloses a solid oxide fuel cell power generation system, which includes a power generation cabinet, a high-temperature zone subsystem and a normal-temperature zone subsystem. The high-temperature zone subsystem is located in the upper part of the power generation cabinet and includes a fuel gas preheater, a reformer, a fuel cell stack, an air preheater and a steam generator; the reformer is respectively connected to the fuel gas preheater, the steam generator and the anodic inlet of the fuel cell stack; the cathodic inlet and the cathodic outlet of the fuel cell stack are respectively connected to the air preheater and the fuel gas preheater; the normal-temperature zone subsystem is located in the lower part of the power generation cabinet and includes a fuel gas supply device connected to the fuel gas preheater, a cathode gas supply device connected to the air preheater and a water supply device connected to the steam generator. According to the solid oxide fuel cell power generation system of the present invention, the high-temperature zone subsystem and the normal-temperature zone subsystem are respectively designed in a modular manner and then arranged in zones, which is beneficial to improving the integration degree, stability, fuel utilization rate and power generation efficiency of the system.

Description

Technical Field

[0001] The present invention relates to the technical field of fuel cells, and more particularly to a solid oxide fuel cell power generation system. Background Art

[0002] SOFC (Solid Oxide Fuel Cell) can convert the chemical energy stored in fuel into electrical energy. It is a power generation technology with high electrical efficiency, good waste heat quality, energy conservation and environmental protection. At the same time, SOFC has low requirements for fuel purity, wide adaptability, and good market prospects. The design of the SOFC power generation system is the key technology under research at present.

[0003] The operating temperature of SOFC is relatively high, with components operating at high temperatures and some at normal temperatures. Due to the structure of the current SOFC power generation system, the integration degree of the power generation system is low, which easily leads to uneven energy distribution in the system. Moreover, there is a problem of low fuel utilization rate, which is not conducive to improving the thermal efficiency of the system and thus affects the power generation efficiency. In addition, the structure of the current SOFC power generation system is not conducive to the installation and maintenance of the system, and also has a certain impact on the safety and stability of the system.

[0004] Therefore, it is necessary to provide a solid oxide fuel cell power generation system to at least partially solve the problems in the related technologies. Summary of the Invention

[0005] A series of simplified concepts are introduced in the Summary of the Invention section, which will be further elaborated in the Detailed Description section. The Summary of the Invention section of the present invention does not mean to attempt to define the key features and essential technical features of the claimed technical solution, nor does it mean to attempt to determine the protection scope of the claimed technical solution.

[0006] In order to at least partially solve the above problems, the present invention provides a solid oxide fuel cell power generation system, which includes:

[0007] A power generation cabinet;

[0008] A high-temperature zone subsystem located in the upper part of the power generation cabinet, the high-temperature zone subsystem includes:

[0009] A gas preheater;

[0010] A reformer connected to the gas preheater;

[0011] A fuel cell stack disposed adjacent to the reformer, the fuel cell stack includes an anode inlet, a cathode inlet, and a cathode outlet, the anode inlet is connected to the reformer, and the cathode outlet is connected to the gas preheater;

[0012] An air preheater, the air preheater being connected to the cathode air inlet;

[0013] A steam generator, the steam generator being connected to the reformer;

[0014] A normal temperature zone subsystem, the normal temperature zone subsystem being located at the lower part of the power generation cabinet, the normal temperature zone subsystem comprising:

[0015] A gas supply device, the gas supply device being arranged below the reformer and connected to the gas preheater;

[0016] A cathode gas supply device, the cathode gas supply device being arranged below the air preheater and connected to the air preheater;

[0017] A water supply device, the water supply device being connected to the steam generator.

[0018] In the solid oxide fuel cell power generation system according to the present invention, the high temperature zone subsystem and the normal temperature zone subsystem are respectively designed in a modular manner. Components with relatively high working temperatures such as the gas preheater, the reformer, the fuel cell stack, the air preheater, and the steam generator are centrally arranged in the high temperature zone subsystem, and components with relatively low working temperatures such as the gas supply device, the cathode gas supply device, and the water supply system device are centrally arranged in the normal temperature zone subsystem. Then, the high temperature zone subsystem and the normal temperature zone subsystem are arranged in separate zones, respectively set at the upper and lower parts of the power generation cabinet, which is beneficial to improving the integration degree of the power generation system, facilitating the assembly, adjustment, and maintenance of the power generation system, and can improve the stability of the power generation system. And it is convenient to carry out heat insulation design for the high temperature zone subsystem, which can effectively improve the fuel utilization rate and power generation efficiency of the power generation system.

[0019] Optionally, the high temperature zone subsystem further includes a steam superheater, the steam superheater being connected between the steam generator and the reformer, and the cathode gas outlet being connected to the steam superheater.

[0020] Optionally, the reformer includes a burner and a heat exchange flow channel, the fuel cell stack further includes an anode gas outlet, the anode gas outlet and the gas supply device are both connected to the burner, and the exhaust gas of the burner sequentially flows through the heat exchange flow channel, the air preheater, and the steam generator.

[0021] Optionally, the normal temperature zone subsystem further includes a cooling water tank, the cooling water tank being connected to the water supply device, and the exhaust gas of the burner flows through the heat exchange flow channel, the air preheater, the steam generator, and the cooling water tank.

[0022] Optionally, the normal temperature zone subsystem further includes an air filter, which is connected between the cathode gas supply device and the air preheater.

[0023] Optionally, the fuel cell stack further includes a power extraction interface for connecting to an external electrical load.

[0024] Optionally, the solid oxide fuel cell power generation system further includes a control device, which is arranged at the lower part of the door panel of the power generation cabinet, and the control system is configured to control the operation of the high temperature zone subsystem and the normal temperature zone subsystem.

[0025] Optionally, the solid oxide fuel cell power generation system further includes a fuel cell stack compression device, which is connected to the fuel cell stack and is used to adjust the pressure on the fuel cell stack according to the temperature change of the fuel cell stack.

[0026] Optionally, the normal temperature zone subsystem further includes a desulfurization device, which is connected between the gas supply device and the gas preheater.

[0027] Optionally, the high temperature zone subsystem further includes a frame structure. The gas preheater, the reformer, the fuel cell stack, the air preheater and the steam generator are all arranged in the frame structure. A heat insulation layer is also arranged in the frame structure, and a sealing plate is arranged around the frame structure. Description of the Drawings

[0028] The following drawings of the embodiments of the present invention are used as a part of the present invention to understand the present invention. The embodiments of the present invention shown in the drawings and their descriptions are used to explain the principles of the present invention.

[0029] In the drawings:

[0030] Figure 1 is a three-dimensional structural schematic diagram of a solid oxide fuel cell power generation system according to a preferred embodiment of the present invention;

[0031] Figure 2 is a structural schematic diagram of the high temperature zone subsystem of the solid oxide fuel cell power generation system according to an embodiment of the present invention; and

[0032] Figure 3 is a structural schematic diagram of the normal temperature zone subsystem of the solid oxide fuel cell power generation system according to an embodiment of the present invention.

[0033] Description of the Reference Numerals:

[0034] 100: Solid oxide fuel cell power generation system 110: Power generation cabinet

[0035] 111: Door panel 120: High-temperature zone subsystem

[0036] 121: Gas preheater 122: Reformer

[0037] 123: Battery stack 124: Air preheater

[0038] 125: Steam generator 126: Steam superheater

[0039] 127: Frame structure 130: Normal-temperature zone subsystem

[0040] 131: Gas supply device 132: Cathode gas supply device

[0041] 133: Water supply device 134: Cooling water tank

[0042] 135: Instruments 136: Desulfurization device

[0043] 140: Control device 150: Battery stack compression device Detailed implementation mode

[0044] In the following description, a large number of specific details are given to provide a more thorough understanding of the present invention. However, it is obvious to those skilled in the art that the embodiments of the present invention can be implemented without one or more of these details. In other examples, in order to avoid confusion with the embodiments of the present invention, some well-known technical features in the art are not described.

[0045] In order to thoroughly understand the present invention, a detailed description will be presented in the following to illustrate the solid oxide fuel cell power generation system 100 of the present invention. Obviously, the implementation of the present invention is not limited to the specific details familiar to those skilled in the art in the field of the solid oxide fuel cell power generation system 100. The preferred embodiments of the present invention are described in detail below. However, in addition to these detailed descriptions, the present invention can also have other embodiments.

[0046] The ordinal numbers such as "first" and "second" cited in the present invention are only identifiers and do not have any other meanings, such as a specific order, etc. Moreover, for example, the term "first component" itself does not imply the existence of a "second component", and the term "second component" itself does not imply the existence of a "first component". The terms "upper", "lower", "front", "rear", "left", "right" and similar expressions used in the present invention are only for clarity and are not restrictive.

[0047] Hereinafter, the specific embodiments of the present invention will be described in more detail with reference to the accompanying drawings. These drawings show representative embodiments of the present invention and do not limit the present invention.

[0048] ReferenceFigure 1 , according to a preferred embodiment of the present invention, a solid oxide fuel cell power generation system 100 includes a power generation cabinet 110, a high-temperature zone subsystem 120, and a normal-temperature zone subsystem 130. The high-temperature zone subsystem 120 is disposed at the upper part of the power generation cabinet 110 and includes components with relatively high operating temperatures such as a gas preheater 121, a reformer 122, a fuel cell stack 123, an air preheater 124, and a steam generator 125. The normal-temperature zone subsystem 130 is located at the lower part of the power generation cabinet 110, that is, below the high-temperature zone subsystem 120. The normal-temperature zone subsystem 130 includes components with relatively low operating temperatures such as a gas supply device 131, a cathode gas supply device 132, and a water supply device 133.

[0049] It should be noted that the operating temperature of the high-temperature zone subsystem 120 in the present invention is approximately around 700 °C, and the operating temperature of the normal-temperature zone subsystem 130 does not exceed 60 °C.

[0050] According to the solid oxide fuel cell power generation system 100 of the present invention, the high-temperature zone subsystem 120 and the normal-temperature zone subsystem 130 are respectively designed in a modular manner, and then the high-temperature zone subsystem 120 and the normal-temperature zone subsystem 130 are arranged in separate zones, respectively disposed at the upper and lower parts of the power generation cabinet 110, which is beneficial to improving the integration degree of the power generation system, facilitating the assembly, adjustment, and maintenance of the solid oxide fuel cell power generation system 100, and capable of enhancing the stability of the solid oxide fuel cell power generation system 100. And it is convenient to perform heat insulation design on the high-temperature zone subsystem 120, and can effectively improve the fuel utilization rate and power generation efficiency of the solid oxide fuel cell power generation system 100.

[0051] Specifically, referring to Figure 2 and Figure 3 , the reformer 122 is installed at a position approximately in the center of the high-temperature zone subsystem 120. The reformer 122 preferably adopts a multi-layer sleeve structure, and its interior includes a burner (not shown) and a heat exchange flow channel (not shown). Fuels such as natural gas are supplied from the gas supply device 131 disposed in the normal-temperature zone subsystem 130 to the reformer 122 to carry out a reforming reaction in the reformer 122 to generate hydrogen-rich gas, providing the gas required for the electrochemical reaction of the fuel cell stack 123 to generate electric energy. The burner is disposed at the lower part of the reformer 122, such as at the lower part of the sleeve structure, for providing the heat required for the reforming reaction of the reformer 122.

[0052] Part of the fuel of the burner comes from the gas supply device 131 of the normal-temperature zone subsystem 130. Fuels such as natural gas enter the burner from the gas supply device 131 for combustion to provide heat for the reforming reaction of the reformer 122 at the start-up stage of the solid oxide fuel cell power generation system 100.

[0053] To effectively shorten the gas transmission path, the gas supply device 131 is preferably arranged at the position corresponding to the reformer 122 in the normal temperature zone subsystem 130, that is, the gas supply device 131 is arranged below the reformer 122.

[0054] To improve the efficiency of the reforming reaction of fuels such as natural gas entering the reformer 122, a gas preheater 121 is preferably further arranged in the high temperature zone subsystem 120. The gas inlet end of the gas preheater 121 is connected to the gas supply device 131, and the gas outlet end of the gas preheater 121 is connected to the gas inlet of the reformer 122 to appropriately increase the temperature of fuels such as natural gas entering the reformer 122.

[0055] To ensure the stability and safety of the gas supply to the reformer 122, that is, to ensure the stability and safety of the operation of the solid oxide fuel cell power generation system 100, components such as control valves, flow meters, temperature sensors, and pressure sensors are respectively arranged on the gas supply pipeline between the gas supply device 131, the gas preheater 121, and the reformer 122 to effectively control the gas volume entering the reformer 122 and to monitor the temperature and pressure of the gas entering the reformer 122 in real time.

[0056] To remove the impurity sulfur in the gas entering the reformer 122 and ensure the purity of the gas entering the reformer 122, a desulfurization device 136 is preferably arranged in the normal temperature zone subsystem 130. The desulfurization device 136 is connected between the gas supply device 131 and the gas preheater 121 to purify the gas entering the gas preheater 121 and the reformer 122.

[0057] The water vapor required for the reforming reaction in the reformer 122 comes from the steam generator 125 arranged in the high temperature zone subsystem 120. The water required by the steam generator 125 comes from the water supply device 133 arranged in the normal temperature zone subsystem 130. The inlet of the steam generator 125 is connected to the outlet of the water supply device 133, and the outlet of the steam generator 125 is connected to the steam inlet of the reformer 122 to provide steam at an appropriate temperature for the reformer 122.

[0058] To ensure the temperature of the steam entering the reformer 122 and effectively improve the efficiency of the reforming reaction, a steam superheater 126 is preferably further arranged in the high temperature zone subsystem 120. The inlet of the steam superheater 126 is connected to the steam generator 125, and the outlet of the steam superheater 126 is connected to the steam inlet of the reformer 122 to provide superheated steam at an appropriate temperature for the reformer 122.

[0059] The battery stack 123 is installed at a position approximately in the center of the high-temperature zone subsystem 120 and is arranged adjacent to the reformer 122. The battery stack 123 includes an anode, a cathode, and a power extraction interface. Among them, the power extraction interface is used to connect to an external electrical load to output the electrical energy generated by the battery stack 123. The anode has an anode inlet and an anode outlet. The cathode has a cathode inlet and a cathode outlet. The anode inlet is connected to the outlet of the hydrogen-rich gas of the reformer 122 to receive the hydrogen-rich gas for an electrochemical reaction. The anode outlet is connected to the inlet of the burner to further burn the combustible gas in the anode exhaust gas, provide heat for the reforming reaction in the reformer 122, and further improve the fuel utilization rate.

[0060] During the process of the solid oxide fuel cell power generation system 100 starting up to reach a stable operating state, the supply of fuel to the burner by the gas supply device 131 is gradually reduced and then shut off. The heat required for the reforming reaction in the reformer 122 is mainly provided by the combustion of the anode exhaust gas entering the burner, so as to save fuel while ensuring the stable operation of the solid oxide fuel cell power generation system 100 and improve the fuel utilization rate.

[0061] In order to make full use of the waste heat of the exhaust gas generated by the burner, the exhaust gas generated by the burner first flows through the heat exchange channels of the reformer 122 to provide the heat required for the reforming reaction in the reformer 122; then it flows through the air preheater 124 and the steam generator 125 in sequence, which is used to heat the air entering the cathode from the air preheater 124 and the steam entering the reformer 122 from the steam generator 125, so as to make full use of the waste heat of the burner exhaust gas and achieve the cascaded utilization of waste heat.

[0062] The air required by the cathode of the battery stack 123 is provided by the cathode gas supply device 132 arranged in the normal temperature zone. In order to further improve the efficiency of the electrochemical reaction of the battery stack 123, an air preheater 124 is preferably arranged in the high-temperature zone subsystem 120. The air provided by the cathode gas supply device 132 is heated to an appropriate temperature by the air preheater 124 and then enters the cathode of the battery stack 123 from the cathode inlet for an electrochemical reaction.

[0063] In order to effectively shorten the air delivery path, the cathode gas supply device 132 is preferably arranged at the position corresponding to the air preheater 124 in the normal temperature zone subsystem 130, that is, the cathode gas supply device 132 is arranged below the air preheater 124.

[0064] To ensure the stability and safety of the cathode air supply, that is, to ensure the stability and safety of the operation of the solid oxide fuel cell power generation system 100, components such as a high-pressure blower, a control valve, a flowmeter, a temperature sensor, and a pressure sensor are provided on the air supply pipeline between the cathode air supply device 132, the air preheater 124, and the fuel cell stack 123, so as to effectively control the amount of air entering the cathode of the fuel cell stack 123 from the cathode air supply device 132 and to monitor the temperature and pressure of the air entering the cathode in real time.

[0065] The exhaust gas from the cathode is discharged through the cathode exhaust port. A part of the exhaust gas enters the burner through the cathode exhaust port to provide a certain amount of oxygen for the combustion reaction in the burner. Another part of the exhaust gas successively enters the steam superheater 126 and the fuel gas preheater 121 to heat the steam entering the reformer 122 from the steam superheater 126 and the fuel gas entering the reformer 122 from the fuel gas preheater 121, so as to make full use of the waste heat of the cathode exhaust gas and achieve the cascade utilization of the waste heat.

[0066] To remove impurities in the air entering the cathode and ensure the purity of the air entering the cathode, an air filter (not shown) is preferably provided in the normal temperature zone subsystem 130. The air filter is connected between the cathode air supply device 132 and the air preheater 124 to purify the air entering the cathode.

[0067] A cooling water tank 134 is preferably further provided in the normal temperature zone subsystem 130. The cooling water tank 134 is connected to the water supply device to provide a water source for the water supply device. The cooling water tank 134 is preferably arranged at a position near the reformer 122 in the normal temperature zone subsystem 130 and is arranged adjacent to the water supply device 133 to effectively shorten the water supply path. Heat exchange coils are preferably arranged inside the cooling water tank 134. The exhaust gas generated by the burner enters the heat exchange coils in the cooling water tank 134 after flowing through the steam generator 125 to heat the water in the cooling water tank 134, so as to further make full use of the waste heat of the burner exhaust gas and achieve the effect of cascade utilization of the waste heat.

[0068] While the cooling water tank 134 provides a water source for the water supply device 133 to ensure the operation of the solid oxide fuel cell power generation system 100, it also provides hot water for external use such as for daily life.

[0069] To ensure the stability and safety of the steam supply to the reformer 122, that is, to ensure the stability and safety of the operation of the solid oxide fuel cell power generation system 100, instruments and meters 135 such as water pumps, control valves, flow meters, temperature sensors, and pressure sensors are provided on the water supply pipeline between the cooling water tank 134, the water supply device 133, and the steam generator 125 to effectively control the amount of water entering the water supply device 133 and the steam generator 125 from the cooling water tank 134 and to monitor the temperature and pressure of the water entering the water supply device 133 and the steam generator 125 in real time; on the steam supply pipeline between the steam generator 125, the steam superheater 126, and the reformer 122, components such as control valves, flow meters, temperature sensors, and pressure sensors are provided to effectively control the amount of superheated steam entering the reformer 122 and to monitor the temperature and pressure of the superheated steam entering the reformer 122 in real time.

[0070] The solid oxide fuel cell power generation system 100 preferably further includes a control device 140. The control device 140 is arranged at the lower part of the door panel 111 of the power generation cabinet 110, close to the normal temperature zone subsystem 130. For specific reference Figure 1 , to ensure the normal operation of the control device 140 and avoid overheating of the control device 140. The control device 140 can be connected to components such as water pumps, high-pressure blowers, control valves, flow meters, temperature sensors, and pressure sensors in the solid oxide fuel cell power generation system 100 to achieve the control of the operation of the high-temperature zone subsystem 120 and the normal temperature zone subsystem 130.

[0071] To enable the overall disassembly and assembly of each component in the high-temperature zone subsystem 120, the high-temperature zone subsystem 120 preferably further includes a frame structure 127. For specific reference Figure 1 . The gas preheater 121, the reformer 122, the battery stack 123, the air preheater 124, and the steam generator 125 are all arranged within the frame structure 127. The bottom of the frame structure 127 can be fixed to the upper part of the power generation cabinet 110 by means of detachable connections such as screwing. After disconnecting the pipelines connecting the high-temperature zone subsystem 120 and the normal temperature zone subsystem 130, by disassembling the frame structure 127, each component within the high-temperature zone subsystem 120 can be removed together with the frame structure 127, facilitating the overhaul and replacement of each component.

[0072] Preferably, a sealing plate (not shown) is arranged around the frame structure 127 to form a relatively enclosed space, facilitating the heat preservation of the high-temperature zone subsystem 120.

[0073] More preferably, the inside of the frame structure 127 is filled with heat-insulating material to form a heat-insulating layer, that is, heat-insulating material is filled between the sealing plate and each component of the high-temperature zone subsystem 120 to further enhance the heat-insulating effect of the high-temperature zone subsystem 120. The heat-insulating material can be selected from common heat-insulating materials.

[0074] Temperature and pressure measurement point installation holes can be provided at the sealing plate to facilitate the detection of the operating temperature and pressure of the high-temperature zone subsystem 120.

[0075] To ensure the safe operation of the battery stack 123, the solid oxide fuel cell power generation system 100 preferably further includes a battery stack pressing device 150. For details, please refer to Figure 2 .. The battery stack pressing device 150 is connected to the battery stack 123, can apply an initial pressing force to the battery stack 123, and the pressure on the battery stack 123 can be automatically adjusted with the change of the temperature of the battery stack 123, so as to effectively avoid the structural deformation of the battery stack 123 during the operation of the solid oxide fuel cell power generation system 100, prevent the structural rupture of the battery stack 123, and thus ensure the safe operation of the solid oxide fuel cell power generation system 100.

[0076] In Figure 2 the illustrated embodiment, the operable part of the battery stack pressing device 150 extends beyond the top of the frame structure 127 of the high-temperature zone subsystem 120 and can penetrate through the sealing plate to facilitate the relevant operations of the operator.

[0077] Unless otherwise defined, the technical and scientific terms used herein have the same meanings as those commonly understood by those skilled in the technical field of the present invention. The terms used herein are only for the purpose of describing specific embodiments and are not intended to limit the present invention. Terms such as "arranged" that appear herein can mean that one component is directly attached to another component or that one component is attached to another component through an intermediate component. The features described in one embodiment herein can be applied to another embodiment alone or in combination with other features, unless the feature is not applicable or otherwise stated in that other embodiment.

[0078] The present invention has been described through the above embodiments, but it should be understood that the above embodiments are only for the purpose of illustration and example, and are not intended to limit the present invention to the scope of the described embodiments. Those skilled in the art can understand that according to the teachings of the present invention, more variations and modifications can be made, and these variations and modifications all fall within the scope claimed by the present invention.

Claims

1. A solid oxide fuel cell power generation system, characterized in that, The solid oxide fuel cell power generation system includes: A power generation cabinet; A high-temperature zone subsystem, which is located in the upper part of the power generation cabinet. The high-temperature zone subsystem includes: A gas preheater; A reformer, which is connected to the gas preheater; A fuel cell stack, which is arranged adjacent to the reformer. The fuel cell stack includes an anode inlet, an anode outlet, a cathode inlet, and a cathode outlet. The anode inlet is connected to the reformer, and the cathode outlet is connected to the gas preheater; An air preheater, which is connected to the cathode inlet; A steam generator, which is connected to the reformer; A normal-temperature zone subsystem, which is located in the lower part of the power generation cabinet. The normal-temperature zone subsystem includes: A gas supply device, which is arranged below the reformer and is connected to the gas preheater; A cathode gas supply device, which is arranged below the air preheater and is connected to the air preheater; A water supply device, which is connected to the steam generator; Wherein, the reformer includes a burner and a heat exchange flow channel. The burner is arranged in the lower part of the reformer. Both the anode outlet and the gas supply device are connected to the burner. The anode outlet is connected to the inlet of the burner to supply combustible gas in the anode exhaust gas to the burner. The exhaust gas of the burner flows through the heat exchange flow channel, the air preheater, and the steam generator in sequence.

2. The solid oxide fuel cell power generation system according to claim 1, wherein, The high-temperature zone subsystem further includes a steam superheater, which is connected between the steam generator and the reformer. The cathode outlet is connected to the steam superheater.

3. The solid oxide fuel cell power generation system according to claim 1, characterized in that The normal-temperature zone subsystem further includes a cooling water tank, which is connected to the water supply device. The exhaust gas of the burner flows through the heat exchange flow channel, the air preheater, the steam generator, and the cooling water tank.

4. The solid oxide fuel cell power generation system according to claim 1, characterized in that, The normal-temperature zone subsystem further includes an air filter, which is connected between the cathode gas supply device and the air preheater.

5. The solid oxide fuel cell power generation system according to any one of claims 1 to 4, characterized in that, The fuel cell stack further includes a power extraction interface, which is used to connect to an external electrical load.

6. The solid oxide fuel cell power generation system according to any one of claims 1 to 4, characterized in that, The solid oxide fuel cell power generation system further includes a control device, which is arranged in the lower part of the door panel of the power generation cabinet. The control device is configured to control the operation of the high-temperature zone subsystem and the normal-temperature zone subsystem.

7. The solid oxide fuel cell power generation system according to any one of claims 1 to 4, characterized in that The solid oxide fuel cell power generation system further includes a fuel cell stack compression device, which is connected to the fuel cell stack and is used to adjust the pressure on the fuel cell stack according to the temperature change of the fuel cell stack.

8. The solid oxide fuel cell power generation system according to any one of claims 1 to 4, characterized in that The normal-temperature zone subsystem further includes a desulfurization device, which is connected between the gas supply device and the gas preheater.

9. The solid oxide fuel cell power generation system according to any one of claims 1 to 4, characterized in that, The high-temperature zone subsystem further includes a frame structure. The gas preheater, the reformer, the fuel cell stack, the air preheater, and the steam generator are all arranged in the frame structure. A heat insulation layer is also arranged in the frame structure, and a sealing plate is arranged around the frame structure.

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