Fuel cell power generation system and method

Abstract

The invention relates to a fuel cell power generation system and method, and relates to the technical field of fuel cell power generation, and the fuel cell power generation system comprises a compressor, a gas compressor, a combustor, a turbine and a fuel cell; the compressor and the gas compressor are connected with the combustor, and the fuel device is connected with the turbine. The compressor is used for pressurizing the first tail gas and conveying the pressurized first tail gas to the combustor; the first tail gas is obtained by reaction after first fuel gas enters a fuel cell; the air compressor is used for pressurizing the first air and conveying the pressurized first air to the combustor; the combustor is used for combusting the pressurized first tail gas, the pressurized first air and second fuel gas to generate second tail gas; the turbine is used for generating electric energy by using the second tail gas. According to the technical scheme, the turbine is used for power generation at the beginning of the fuel cell power generation system, so that the starting speed of the fuel cell system is increased, and the power generation efficiency of the fuel cell power generation system is improved.

Description

Technical Field

[0001] The present disclosure relates to the technical field of fuel cell power generation, and in particular, to a fuel cell power generation system and method. Background Art

[0002] With the development and popularization of fuel cells, fuel cell power generation technology has become relatively mature, but ordinary fuel cells need to operate at high temperatures, but the heating speed is limited by ceramic materials and cannot be very fast. Therefore, the fuel cell power generation system must heat up slowly to reach the high temperature working temperature, which limits the startup speed of the system. As a result, the entire fuel cell power generation system starts slowly. Summary of the invention

[0003] In order to overcome the problems existing in the related art, the present disclosure provides a fuel cell power generation system and method.

[0004] According to a first aspect of an embodiment of the present disclosure, a fuel cell power generation system is provided, the system comprising: a compressor, an air compressor, a burner, a turbine, and a fuel cell; the compressor and the air compressor are connected to the burner, and the fuel burner is connected to the turbine;

[0005] The compressor is used to pressurize the first tail gas and deliver the pressurized first tail gas to the burner; wherein the first tail gas is obtained by the reaction of the first fuel gas entering the fuel cell;

[0006] The compressor is used to pressurize the first air and deliver the pressurized first air to the burner;

[0007] The burner is used to burn the pressurized first tail gas, the pressurized first air and the second fuel gas to generate the second tail gas;

[0008] The turbine is used to generate electric energy using the second exhaust gas.

[0009] Optionally, the system further comprises: a first heat regenerator, a second heat regenerator, a preheater, and a fan, wherein the first heat regenerator is connected to the fuel cell, the first heat regenerator is connected to the compressor, the second heat regenerator is connected to the preheater, the second heat regenerator is connected to the fuel cell, the preheater is connected to the fan, and the preheater is connected to the turbine;

[0010] The first regenerator is used to heat the first fuel gas;

[0011] The fan is used to pressurize the second air and transport the pressurized second air to the preheater;

[0012] The preheater is used to preliminarily heat the pressurized second air;

[0013] The second regenerator is used to perform secondary heating on the second air after the initial heating;

[0014] The fuel cell is used for reacting the second air heated twice with the first fuel gas heated to obtain the first tail gas and the third tail gas.

[0015] Optionally, the outlet of the compressor is connected to the inlet of the combustor, the outlet of the compressor is connected to the inlet of the fuel burner, and the outlet of the fuel burner is connected to the inlet of the turbine;

[0016] The first fuel gas enters through the first inlet of the first reheater, the first outlet of the first reheater is connected to the first inlet of the fuel cell, the first outlet of the fuel cell is connected to the second inlet of the first reheater, the second outlet of the first reheater is connected to the inlet of the compressor, the first inlet of the second reheater is connected to the first outlet of the preheater, the first outlet of the second reheater is connected to the second inlet of the fuel cell, the second outlet of the fuel cell is connected to the second inlet of the second reheater, the first inlet of the preheater is connected to the outlet of the fan, and the second inlet of the preheater is connected to the outlet of the turbine.

[0017] Optionally, the fuel burner is further used to deliver second exhaust gas obtained by burning the first exhaust gas, the first air and the second fuel gas to the turbine;

[0018] The turbine is further used to deliver the second exhaust gas to the preheater to preliminarily heat the supercharged second air.

[0019] Optionally, the system further comprises: a recovery module; the inlet of the recovery module is connected to the second outlet of the second regenerator, and the inlet of the recovery module is connected to the second outlet of the preheater;

[0020] The recovery module is used to recover energy of the second tail gas and the third tail gas.

[0021] According to a second aspect of an embodiment of the present disclosure, a fuel cell power generation method is provided, which is applied to a fuel cell power generation system, the system comprising: a compressor, an air compressor, a burner, a turbine, and a fuel cell; the compressor and the air compressor are connected to the burner, and the fuel burner is connected to the turbine, the method comprising:

[0022] The compressor pressurizes the first tail gas and delivers the pressurized first tail gas to the burner; wherein the first tail gas is obtained by the reaction of the first fuel gas entering the fuel cell;

[0023] The compressor pressurizes the first air and delivers the pressurized first air to the burner;

[0024] The burner burns the pressurized first tail gas, the pressurized first air, and the second fuel gas to generate the second tail gas;

[0025] The turbine generates electrical energy using the second exhaust gas.

[0026] Optionally, the fuel cell power generation system further includes: a first heat regenerator, a second heat regenerator, a preheater, and a fan, wherein the first heat regenerator is connected to the fuel cell, the first heat regenerator is connected to the compressor, the second heat regenerator is connected to the preheater, the second heat regenerator is connected to the fuel cell, the preheater is connected to the fan, and the preheater is connected to the turbine, and the method further includes:

[0027] The first regenerator heats the first fuel gas;

[0028] The fan pressurizes the second air and delivers the pressurized second air to the preheater;

[0029] The preheater preliminarily heats the pressurized second air;

[0030] The second regenerator performs secondary heating on the second air after the primary heating;

[0031] The fuel cell reacts the second air that has been heated twice with the heated first fuel gas to obtain the first tail gas and the third tail gas.

[0032] Optionally, the outlet of the compressor is connected to the inlet of the combustor, the outlet of the compressor is connected to the inlet of the fuel burner, and the outlet of the fuel burner is connected to the inlet of the turbine;

[0033] The first fuel gas enters through the first inlet of the first reheater, the first outlet of the first reheater is connected to the first inlet of the fuel cell, the first outlet of the fuel cell is connected to the second inlet of the first reheater, the second outlet of the first reheater is connected to the inlet of the compressor, the first inlet of the second reheater is connected to the first outlet of the preheater, the first outlet of the second reheater is connected to the second inlet of the fuel cell, the second outlet of the fuel cell is connected to the second inlet of the second reheater, the first inlet of the preheater is connected to the outlet of the fan, and the second inlet of the preheater is connected to the outlet of the turbine.

[0034] Optionally, the method further comprises:

[0035] The burner transmits the second exhaust gas obtained by burning the first exhaust gas, the first air and the second fuel gas to the turbine;

[0036] The turbine delivers the second exhaust gas to the preheater to preliminarily heat the supercharged second air.

[0037] Optionally, the fuel cell power generation system further comprises: a recovery module; the inlet of the recovery module is connected to the second outlet of the second regenerator, and the inlet of the recovery module is connected to the second outlet of the preheater, and the method further comprises:

[0038] The recovery module recovers energy of the second exhaust gas and the third exhaust gas.

[0039] The technical solution provided by the embodiments of the present disclosure may have the following beneficial effects:

[0040] In the above technical solution, the fuel cell power generation system includes: a compressor, an air compressor, a burner, a turbine, and a fuel cell; the compressor and the air compressor are connected to the burner, and the fuel burner is connected to the turbine; the compressor is used to pressurize the first tail gas and deliver the pressurized first tail gas to the burner; wherein the first tail gas is obtained by the reaction after the first fuel gas enters the fuel cell; the air compressor is used to pressurize the first air and deliver the pressurized first air to the burner; the burner is used to burn the pressurized first tail gas, the pressurized first air, and the second fuel gas to generate the second tail gas; the turbine is used to generate electricity using the second tail gas. Through the above technical solution, the fuel cell and the turbine are integrated, and the turbine is initially used to generate electricity when the fuel cell power generation system is started, thereby improving the startup speed of the fuel cell system and improving the power generation efficiency of the fuel cell power generation system.

[0041] Other features and advantages of the present disclosure will be described in detail in the following detailed description. BRIEF DESCRIPTION OF THE DRAWINGS

[0042] The accompanying drawings are used to provide a further understanding of the present disclosure and constitute a part of the specification. Together with the following specific embodiments, they are used to explain the present disclosure but do not constitute a limitation of the present disclosure. In the accompanying drawings:

[0043] Figure 1 is a schematic diagram of a fuel cell power generation system according to an exemplary embodiment.

[0044] Figure 2 is a schematic diagram of another fuel cell power generation system according to an exemplary embodiment.

[0045] Figure 3 is a schematic diagram of another fuel cell power generation system according to an exemplary embodiment.

[0046] Figure 4 is a block diagram of yet another fuel cell power generation system according to an exemplary embodiment.

[0047] Figure 5 The figure is a flow chart of a fuel cell power generation method according to an exemplary embodiment.

[0048] Figure 6 The figure is a flow chart showing another fuel cell power generation method according to an exemplary embodiment.

[0049] Figure 7 is a flow chart of yet another fuel cell power generation method according to an exemplary embodiment. DETAILED DESCRIPTION

[0050] Exemplary embodiments will be described in detail herein, examples of which are shown in the accompanying drawings. When the following description refers to the drawings, the same numbers in different drawings represent the same or similar elements unless otherwise indicated. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present disclosure. Instead, they are merely examples of devices and methods consistent with some aspects of the present disclosure as detailed in the appended claims.

[0051] It is to be understood that in the present disclosure, "plurality" refers to two or more than two, and other quantifiers are similar. "And / or" describes the association relationship of associated objects, indicating that three relationships may exist. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. The character " / " generally indicates that the associated objects before and after are in an "or" relationship. The singular forms "a", "the" and "the" are also intended to include plural forms, unless the context clearly indicates other meanings.

[0052] It is further understood that the terms "first", "second", etc. are used to describe various information, but such information should not be limited to these terms. These terms are only used to distinguish the same type of information from each other, and do not indicate a specific order or importance. In fact, the expressions "first", "second", etc. can be used interchangeably.

[0053] It is further understood that, although the operations are described in a specific order in the drawings in the embodiments of the present disclosure, it should not be understood as requiring the operations to be performed in the specific order shown or in a serial order, or requiring the execution of all the operations shown to obtain the desired results. In certain environments, multitasking and parallel processing may be advantageous.

[0054] It should be noted that all actions of acquiring signals, information or data in this application are carried out in compliance with the relevant data protection laws and policies of the country where they are located, and with the authorization given by the owner of the corresponding device.

[0055] Figure 1 is a schematic diagram of a fuel cell power generation system according to an exemplary embodiment. Figure 1 As shown, the fuel cell power generation system 10 includes: a compressor 101, an air compressor 102, a burner 103, a turbine 104, and a fuel cell 105; the compressor 101 and the air compressor 102 are connected to the burner 103, and the fuel burner 103 is connected to the turbine 104;

[0056] The compressor 101 is used to pressurize the first tail gas and deliver the pressurized first tail gas to the burner 103 ; wherein the first tail gas is obtained by the reaction of the first fuel gas entering the fuel cell 105 .

[0057] It is understood that the first tail gas is the anode tail gas generated by the anode of the fuel cell 105, that is, the waste gas released from the anode (negative electrode) during the operation of the fuel cell 105. The anode tail gas may contain water vapor, a small amount of unreacted hydrogen and carbon dioxide. The first tail gas is pressurized by the compressor 101, and the pressurized first tail gas is delivered to the burner 103. A reciprocating air compressor, a screw air compressor or other compressor can be used.

[0058] The compressor 102 is used to pressurize the first air and transport the pressurized first air to the burner 103.

[0059] It can be understood that, similarly, the first air is pressurized by a compressor, and the pressurized first air and the pressurized first exhaust gas are mixed and then enter the burner 103 for combustion, thereby improving the combustion efficiency.

[0060] The burner 103 is used to burn the pressurized first exhaust gas, the pressurized first air and the second fuel gas to generate the second exhaust gas.

[0061] It is understandable that the second fuel gas may be hydrogen, methanol or natural gas. Combusting the pressurized first tail gas, the pressurized first air and the second burner can increase the gas density and pressure in the burner 103, increase the combustion speed and heat release rate, and improve the combustion efficiency; by pressurizing, more first tail gas and first air can be pressed into the burner 103, resulting in a higher burner pressure, thereby increasing the power output of the burner; and, pressurizing can improve the completeness of the combustion of the first tail gas, the first air and the second combustion gas, and reduce unburned residues and exhaust emissions.

[0062] The turbine 104 is used to generate electric energy using the second exhaust gas.

[0063] It is understandable that when the fuel cell power generation system 10 needs to be started quickly, at this time, the burner 103, the turbine 104 and the compressor 102 are working. The second fuel gas enters the burner by relying on the back pressure of the system pipeline, and the first air enters the burner 103 after being pressurized by the compressor 102. The second fuel gas and the first air are burned in the burner 103. The exhaust gas after the combustion of the first air and the second fuel gas drives the turbine 103 to rotate, thereby generating electrical energy, thereby achieving a rapid start of the fuel cell power generation system. When the fuel cell power generation system 10 has been fully started and is operating normally, the second fuel gas enters the burner by relying on the back pressure of the system pipeline, the first air enters the burner 103 after being pressurized by the compressor 102, and the first exhaust gas enters the fuel gas 103 after being pressurized by the compressor 101. The first exhaust gas, the second fuel gas and the first air are burned in the burner 103, and the second exhaust gas obtained after combustion drives the turbine 103 to rotate, thereby generating electrical energy.

[0064] In the above technical solution, the fuel cell power generation system includes: a compressor, an air compressor, a burner, a turbine, and a fuel cell; the compressor and the air compressor are connected to the burner, and the fuel burner is connected to the turbine; the compressor is used to pressurize the first tail gas and deliver the pressurized first tail gas to the burner; wherein the first tail gas is obtained by the reaction after the first fuel gas enters the fuel cell; the air compressor is used to pressurize the first air and deliver the pressurized first air to the burner; the burner is used to burn the pressurized first tail gas, the pressurized first air, and the second fuel gas to generate the second tail gas; the turbine is used to generate electricity using the second tail gas. Through the above technical solution, the fuel cell and the turbine are integrated, and the turbine is initially used to generate electricity when the fuel cell power generation system is started, thereby improving the startup speed of the fuel cell system and improving the power generation efficiency of the fuel cell power generation system.

[0065] Optionally, Figure 2 is a schematic diagram of another fuel cell power generation system according to an exemplary embodiment. Figure 2 As shown, the fuel cell power generation system 10 further includes: a first reheater 106, a second reheater 107, a preheater 108, and a fan 109, wherein the first reheater 106 is connected to the fuel cell 105, the first reheater 106 is connected to the compressor 101, the second reheater 107 is connected to the preheater 108, the second reheater 107 is connected to the fuel cell 105, the preheater 108 is connected to the fan 109, and the preheater 108 is connected to the turbine 104;

[0066] The first regenerator 106 is used to heat the first fuel gas.

[0067] The fan 109 is used to pressurize the second air and transport the pressurized second air to the preheater 108 .

[0068] The preheater 108 is used to preliminarily heat the pressurized second air.

[0069] The second regenerator 107 is used for secondary heating of the second air after the primary heating.

[0070] The fuel cell 105 is used to react the second air that has been heated twice with the heated first fuel gas to obtain the first tail gas and the third tail gas.

[0071] Optionally, the fuel burner 103 is also used to deliver the second exhaust gas obtained by burning the first exhaust gas, the first air and the second fuel gas to the turbine 104 .

[0072] The turbine 104 is further used to deliver the second exhaust gas to the preheater 108 to preliminarily heat the boosted second air.

[0073] It can be understood that the first reheater 106 uses the waste heat of the first exhaust gas to heat the first fuel gas, the preheater 108 uses the waste heat of the first air, the second fuel gas and the second exhaust gas after the combustion of the first exhaust gas delivered by the turbine 104 to preliminarily heat the second air after supercharging, and the second reheater 107 uses the waste heat of the second exhaust gas to perform secondary heating on the preliminarily heated second air after supercharging, so as to improve the reaction efficiency of the second air at the fuel cell 105. Among them, the preheater can select common heat exchangers and other equipment, and the working range of the fuel cell 105 is generally 600-900°C, and a fuel cell with a higher temperature can be preferably selected to improve the system operation efficiency.

[0074] Optionally, Figure 3 is a schematic diagram of another fuel cell power generation system according to an exemplary embodiment. Figure 3As shown, the outlet of the compressor 101 is connected to the inlet of the combustor 103, the outlet of the compressor 102 is connected to the inlet of the fuel burner 103, and the outlet of the fuel burner 103 is connected to the inlet of the turbine 104; the first fuel gas enters through the first inlet of the first reheater 106, the first outlet of the first reheater 106 is connected to the first inlet of the fuel cell 105, the first outlet of the fuel cell 105 is connected to the second inlet of the first reheater 106, the second outlet of the first reheater 106 is connected to the inlet of the compressor 101, the first inlet of the second reheater 107 is connected to the first outlet of the preheater 108, the first outlet of the second reheater 107 is connected to the second inlet of the fuel cell 105, the second outlet of the fuel cell 105 is connected to the second inlet of the second reheater 107, the first inlet of the preheater 108 is connected to the outlet of the fan 109, and the second inlet of the preheater 108 is connected to the outlet of the turbine 104.

[0075] Optionally, Figure 4 is a block diagram of another fuel cell power generation system according to an exemplary embodiment. Figure 4 As shown, the fuel cell power generation system 10 further includes: a recovery module 110; the inlet of the recovery module 110 is connected to the second outlet of the second regenerator 107, and the inlet of the recovery module 110 is connected to the second outlet of the preheater 108;

[0076] The recovery module 110 is used to recover energy of the second tail gas and the third tail gas.

[0077] It is understandable that the recovery device 101 recovers the waste heat of the second tail gas passing through the preheater and the third tail gas passing through the second regenerator, thereby recycling energy. For example, a waste heat recovery device that can transfer heat in the gas to other media.

[0078] Through the above technical scheme, the exhaust gas of the fuel cell power generation system is used through a regenerator and a preheater to preheat the fuel gas and air entering the fuel cell power generation system, and the gas entering the fuel cell power generation system is pressurized, thereby improving the reaction efficiency of the gas and saving energy.

[0079] Figure 5 is a flow chart of a fuel cell power generation method according to an exemplary embodiment. Figure 5 As shown, the method is applied to a fuel cell power generation system, the fuel cell power generation system comprises: a compressor, an air compressor, a burner, a turbine, and a fuel cell; the compressor and the air compressor are connected to the burner, the fuel burner is connected to the turbine, and the method comprises:

[0080] In step S501, the compressor pressurizes the first exhaust gas and delivers the pressurized first exhaust gas to the burner; wherein the first exhaust gas is obtained by the reaction of the first fuel gas entering the fuel cell.

[0081] In step S502, the compressor pressurizes the first air and delivers the pressurized first air to the burner.

[0082] In step S503, the burner burns the pressurized first exhaust gas, the pressurized first air, and the second fuel gas to generate the second exhaust gas.

[0083] In step S504 , the turbine generates electrical energy using the second exhaust gas.

[0084] Optionally, Figure 6 is a flow chart of another fuel cell power generation method according to an exemplary embodiment. Figure 6 As shown, the fuel cell power generation system further includes: a first regenerator, a second regenerator, a preheater, and a fan, wherein the first regenerator is connected to the fuel cell, the first regenerator is connected to the compressor, the second regenerator is connected to the preheater, the second regenerator is connected to the fuel cell, the preheater is connected to the fan, and the preheater is connected to the turbine. The method further includes:

[0085] In step S505, the first regenerator heats the first fuel gas.

[0086] In step S506, the fan pressurizes the second air and delivers the pressurized second air to the preheater.

[0087] In step S507, the preheater preliminarily heats the supercharged second air.

[0088] In step S508, the second regenerator performs secondary heating on the second air after the primary heating.

[0089] In step S509, the combustion cell reacts the second air after secondary heating with the heated first fuel gas to obtain the first exhaust gas and the third exhaust gas.

[0090] Optionally, the outlet of the compressor is connected to the inlet of the combustor, the outlet of the compressor is connected to the inlet of the fuel burner, and the outlet of the fuel burner is connected to the inlet of the turbine;

[0091] The first fuel gas enters through the first inlet of the first reheater, the first outlet of the first reheater is connected to the first inlet of the fuel cell, the first outlet of the fuel cell is connected to the second inlet of the first reheater, the second outlet of the first reheater is connected to the inlet of the compressor, the first inlet of the second reheater is connected to the first outlet of the preheater, the first outlet of the second reheater is connected to the second inlet of the fuel cell, the second outlet of the fuel cell is connected to the second inlet of the second reheater, the first inlet of the preheater is connected to the outlet of the fan, and the second inlet of the preheater is connected to the outlet of the turbine.

[0092] Optionally, Figure 7 is a flow chart of another fuel cell power generation method according to an exemplary embodiment. Figure 7 As shown, the method may also include:

[0093] In step S510 , the combustor transmits the second exhaust gas obtained by burning the first exhaust gas, the first air and the second fuel gas to the turbine.

[0094] In step S511 , the turbine delivers the second exhaust gas to the preheater to preliminarily heat the supercharged second air.

[0095] Optionally, the fuel cell power generation system further includes: a recovery module; the inlet of the recovery module is connected to the second outlet of the second regenerator, and the inlet of the recovery module is connected to the second outlet of the preheater. The method may further include:

[0096] The recovery module recovers energy of the second exhaust gas and the third exhaust gas.

[0097] In the above technical solution, the fuel cell power generation system includes: a compressor, an air compressor, a burner, a turbine, and a fuel cell; the compressor and the air compressor are connected to the burner, and the fuel burner is connected to the turbine; the compressor is used to pressurize the first tail gas and deliver the pressurized first tail gas to the burner; wherein the first tail gas is obtained by the reaction after the first fuel gas enters the fuel cell; the air compressor is used to pressurize the first air and deliver the pressurized first air to the burner; the burner is used to burn the pressurized first tail gas, the pressurized first air, and the second fuel gas to generate the second tail gas; the turbine is used to generate electricity using the second tail gas. Through the above technical solution, the fuel cell and the turbine are integrated, and the turbine is initially used to generate electricity when the fuel cell power generation system is started, thereby improving the startup speed of the fuel cell system and improving the power generation efficiency of the fuel cell power generation system.

[0098] The preferred embodiments of the present disclosure are described in detail above in conjunction with the accompanying drawings; however, the present disclosure is not limited to the specific details in the above embodiments. Within the technical concept of the present disclosure, a variety of simple modifications can be made to the technical solution of the present disclosure, and these simple modifications all fall within the protection scope of the present disclosure.

[0099] It should also be noted that the various specific technical features described in the above specific embodiments can be combined in any suitable manner without contradiction. In order to avoid unnecessary repetition, the present disclosure will not further describe various possible combinations.

[0100] In addition, various embodiments of the present disclosure may be arbitrarily combined, and as long as they do not violate the concept of the present disclosure, they should also be regarded as the contents disclosed by the present disclosure.

Claims

1. A fuel cell power generation system, characterized in that: The system comprises: a compressor, an air compressor, a burner, a turbine, and a fuel cell; the compressor and the air compressor are connected to the burner, and the fuel burner is connected to the turbine; The compressor is used to pressurize the first tail gas and deliver the pressurized first tail gas to the burner; wherein the first tail gas is obtained by the reaction of the first fuel gas entering the fuel cell; The compressor is used to pressurize the first air and deliver the pressurized first air to the burner; The burner is used to burn the pressurized first tail gas, the pressurized first air and the second fuel gas to generate the second tail gas; The turbine is used to generate electrical energy using the second exhaust gas.

2. The system according to claim 1, characterized in that The system further comprises: a first heat exchanger, a second heat exchanger, a preheater, and a fan, wherein the first heat exchanger is connected to the fuel cell, the first heat exchanger is connected to the compressor, the second heat exchanger is connected to the preheater, the second heat exchanger is connected to the fuel cell, the preheater is connected to the fan, and the preheater is connected to the turbine; The first regenerator is used to heat the first fuel gas; The fan is used to pressurize the second air and transport the pressurized second air to the preheater; The preheater is used to preliminarily heat the pressurized second air; The second regenerator is used to perform secondary heating on the second air after the initial heating; The fuel cell is used for reacting the second air heated twice with the first fuel gas heated to obtain the first tail gas and the third tail gas.

3. The system according to claim 2, characterized in that The outlet of the compressor is connected to the inlet of the combustor, the outlet of the compressor is connected to the inlet of the fuel burner, and the outlet of the fuel burner is connected to the inlet of the turbine; The first fuel gas enters through the first inlet of the first reheater, the first outlet of the first reheater is connected to the first inlet of the fuel cell, the first outlet of the fuel cell is connected to the second inlet of the first reheater, the second outlet of the first reheater is connected to the inlet of the compressor, the first inlet of the second reheater is connected to the first outlet of the preheater, the first outlet of the second reheater is connected to the second inlet of the fuel cell, the second outlet of the fuel cell is connected to the second inlet of the second reheater, the first inlet of the preheater is connected to the outlet of the fan, and the second inlet of the preheater is connected to the outlet of the turbine.

4. The system according to claim 2, characterized in that The fuel burner is further used to deliver the second exhaust gas obtained by burning the first exhaust gas, the first air and the second fuel gas to the turbine; The turbine is further used to deliver the second exhaust gas to the preheater to preliminarily heat the supercharged second air.

5. The system according to claim 1, characterized in that The system further comprises: a recovery module; an inlet of the recovery module is connected to the second outlet of the second regenerator, and an inlet of the recovery module is connected to the second outlet of the preheater; The recovery module is used to recover energy of the second tail gas and the third tail gas.

6. A fuel cell power generation method, characterized in that: Applied to a fuel cell power generation system, the system comprises: a compressor, an air compressor, a burner, a turbine, and a fuel cell; the compressor and the air compressor are connected to the burner, the fuel burner is connected to the turbine, and the method comprises: The compressor pressurizes the first tail gas and delivers the pressurized first tail gas to the burner; wherein the first tail gas is obtained by the reaction of the first fuel gas entering the fuel cell; The compressor pressurizes the first air and delivers the pressurized first air to the burner; The burner burns the pressurized first tail gas, the pressurized first air, and the second fuel gas to generate the second tail gas; The turbine generates electrical energy using the second exhaust gas.

7. The method according to claim 6, characterized in that The fuel cell power generation system further includes: a first regenerator, a second regenerator, a preheater, and a fan, wherein the first regenerator is connected to the fuel cell, the first regenerator is connected to the compressor, the second regenerator is connected to the preheater, the second regenerator is connected to the fuel cell, the preheater is connected to the fan, and the preheater is connected to the turbine. The method further includes: The first regenerator heats the first fuel gas; The fan pressurizes the second air and delivers the pressurized second air to the preheater; The preheater preliminarily heats the pressurized second air; The second regenerator performs secondary heating on the second air after the primary heating; The combustion cell reacts the second air that has been heated twice with the heated first fuel gas to obtain the first tail gas and the third tail gas.

8. The method according to claim 6, characterized in that The outlet of the compressor is connected to the inlet of the combustor, the outlet of the compressor is connected to the inlet of the fuel burner, and the outlet of the fuel burner is connected to the inlet of the turbine; The first fuel gas enters through the first inlet of the first reheater, the first outlet of the first reheater is connected to the first inlet of the fuel cell, the first outlet of the fuel cell is connected to the second inlet of the first reheater, the second outlet of the first reheater is connected to the inlet of the compressor, the first inlet of the second reheater is connected to the first outlet of the preheater, the first outlet of the second reheater is connected to the second inlet of the fuel cell, the second outlet of the fuel cell is connected to the second inlet of the second reheater, the first inlet of the preheater is connected to the outlet of the fan, and the second inlet of the preheater is connected to the outlet of the turbine.

9. The method according to claim 7, characterized in that: The method further comprises: The burner transmits the second exhaust gas obtained by burning the first exhaust gas, the first air and the second fuel gas to the turbine; The turbine delivers the second exhaust gas to the preheater to preliminarily heat the supercharged second air.

10. The method according to claim 6, characterized in that The fuel cell power generation system further includes: a recovery module; the inlet of the recovery module is connected to the second outlet of the second regenerator, and the inlet of the recovery module is connected to the second outlet of the preheater. The method further includes: The recovery module recovers energy of the second exhaust gas and the third exhaust gas.

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