Gas distribution structure and fuel cell power generation system

Abstract

The present invention relates to the field of fuel cell technology, and in particular to a gas distribution structure and a fuel cell power generation system. The gas distribution structure includes a gas distribution plate, and the gas distribution plate is provided with an air intake flow channel, a fuel intake flow channel, a fuel intake port, a fuel outlet, an air intake port and an air outlet. The fuel intake port and the fuel outlet are both connected to the fuel intake flow channel, and the fuel enters the fuel cell stack through the fuel intake flow channel. The air intake port and the air outlet are both connected to the air intake flow channel, and the air enters the fuel cell stack through the air intake flow channel, thereby realizing the supply of air and fuel to the fuel cell stack. The fuel intake port and the air intake port are connected to a heat exchanger. By setting the gas distribution plate, the fuel cell power generation system can integrate the pipeline structure connected to the fuel cell stack and the heat exchanger into the gas distribution plate, thereby effectively simplifying the structure of the fuel cell power generation system.

Description

Technical Field

[0001] The present invention relates to the technical field of fuel cells, and in particular to a gas distribution structure and a fuel cell power generation system. Background Art

[0002] The solid oxide fuel cell power generation system is mainly composed of an air supply unit, a fuel / water supply unit, a thermal component unit, a SOFC stack module, a power converter, a control unit and an auxiliary unit, etc., in order to generate electricity by catalyzing fuel.

[0003] As disclosed in the patent document with publication number CN102237540B, the fuel cell system may include a fuel cell stack, an oxidant supply unit in fluid communication with the fuel cell stack, and a reformer in fluid communication with the fuel cell stack through a reforming gas pipe. The reformer may include a reforming unit and a combustion unit. The fuel cell system may also include a fuel tank in fluid communication with the reformer, a water tank including an inlet and an outlet, and at least one gas pipe starting from the reformer and positioned to contact or pass through the water tank. The outlet is in fluid communication with the reformer.

[0004] It can be seen that in order to realize the gas supply to the burner, reformer and stack of the fuel cell system and the discharge of fuel gas, the existing fuel cell power generation system needs to connect pipeline components such as fuel inlet pipes and air inlet pipes to the burner, reformer, fuel cell and other equipment, resulting in a complex structure and large size of the fuel cell system and high production cost. Summary of the invention

[0005] In view of this, it is necessary to provide a gas distribution structure and a fuel cell power generation system to solve the technical problem that the structure of the fuel cell power generation system in the prior art is relatively complicated due to the arrangement of pipelines.

[0006] In order to achieve the above technical objectives, the technical solution of the present invention provides an air distribution structure, including an air distribution plate, wherein the air distribution plate is provided with an air intake channel, a fuel intake channel, a fuel intake port, a fuel outlet, an air intake port and an air outlet, wherein the fuel intake port and the fuel outlet are both communicated with the fuel intake channel, the air intake port and the air outlet are both communicated with the air intake channel, the fuel intake port and the air intake port are used for connecting a heat exchanger, and the fuel outlet and the air outlet are used for connecting a fuel supply port and an air supply port of a fuel cell stack;

[0007] The gas distribution plate includes a battery fixing area and a heat exchange reforming area located on one side of the battery fixing area, the battery fixing area is used to fix the fuel cell, the fuel outlet and the air outlet are both located in the battery fixing area, the heat exchange reforming area is used to fix the burner, and the fuel inlet and the air inlet are both located in the heat exchange reforming area.

[0008] Furthermore, the gas distribution plate is also provided with a gas outlet flow duct, a gas inlet and a gas outlet. The gas inlet and the gas outlet are respectively located in the battery fixing area and the heat exchange reforming area and are both connected to the gas outlet flow duct. The gas inlet is supplied to the exhaust port connected to the fuel cell stack for receiving excess fuel discharged from the fuel cell stack, and the gas outlet is supplied to the burner.

[0009] Furthermore, the gas distribution plate includes an insulating top plate and a heat conducting plate, the insulating top plate is provided with an installation cavity, the heat conducting plate is installed in the installation cavity and fits with the side wall of the installation cavity, the air inlet flow channel, the fuel inlet flow channel and the gas outlet flow channel are all arranged on the heat conducting plate, and the fuel inlet, the fuel outlet, the air inlet, the air outlet, the gas inlet and the gas outlet are all arranged on the insulating top plate.

[0010] Furthermore, the gas distribution plate is also provided with an exhaust gas outlet flow duct, an exhaust gas inlet and an exhaust gas outlet. The gas inlet and the gas outlet are respectively located in the battery fixing area and the heat exchange reforming area and are both connected to the gas outlet flow duct. The exhaust gas inlet is supplied to the exhaust port connected to the fuel cell stack for receiving excess air discharged from the fuel cell stack, and the gas outlet is supplied to the burner.

[0011] Furthermore, the cross-section of the air inlet flow passage gradually increases toward the air outlet.

[0012] Compared with the prior art, the beneficial effects of the gas distribution structure of the present invention include: by setting a gas distribution plate, the gas distribution plate is provided with an air intake flow channel, a fuel intake flow channel, a fuel air inlet, a fuel air outlet, an air intake port and an air outlet, the fuel air inlet port and the fuel outlet are both connected to the fuel intake flow channel, the fuel required by the fuel cell stack enters the fuel intake flow channel through the fuel air inlet port, flows along the fuel intake flow channel, and enters the fuel cell stack from the fuel outlet, the air inlet port and the air outlet are both connected to the air intake flow channel, the air required by the fuel cell stack enters the air intake flow channel through the air inlet port, flows along the air intake flow channel, and enters the fuel cell stack from the air outlet, thereby realizing the supply of air and fuel to the fuel cell stack, the fuel air inlet port and the air inlet port can be connected to a heat exchanger, so that the air and fuel can be heated under the heat exchange of the heat exchanger before being supplied to the fuel cell stack, and through the setting of the gas distribution plate, the pipeline structure connected with the fuel cell stack and the heat exchanger can be integrated into the gas distribution plate, thereby effectively simplifying the structure of the fuel cell power generation system and reducing the volume of the fuel cell power generation system.

[0013] In order to achieve the above-mentioned technical objectives, the technical solution of the present invention provides a fuel cell power generation system, including a heat exchanger, a fuel cell stack and a gas distribution plate, the fuel outlet and the air outlet of the heat exchanger are respectively connected to the fuel inlet and the air inlet, and the fuel supply inlet and the air supply inlet of the fuel cell stack are respectively connected to the fuel inlet and the air outlet.

[0014] Furthermore, the fuel cell power generation system also includes a burner, which is fixed to the heat exchange reforming zone and connected to the gas outlet and the exhaust gas outlet, and is used to burn the gas supplied from the gas outlet. The heat exchanger is fixed to the burner.

[0015] Furthermore, the fuel cell power generation system also includes a reformer, which is fixed to the heat exchanger. The heat exchanger is provided with a water supply port, which is used to supply water to the heat exchanger. The heat exchanger is used to heat the water body through the flue gas supplied by the burner to form steam, and the heat exchanger is used to reform the fuel through the steam.

[0016] Furthermore, the heat exchanger is also provided with an air inlet, which is communicated with the air inlet and is used to supply air to the heat exchanger. The heat exchanger is also used to heat the air through the flue gas supplied by the burner.

[0017] Compared with the prior art, the fuel cell power generation system of the present invention has the following beneficial effects: by setting up a gas distribution plate, the fuel cell power generation system can integrate the pipeline structure connected to the fuel cell stack and the heat exchanger into the gas distribution plate, thereby effectively simplifying the structure of the fuel cell power generation system and reducing the volume of the fuel cell power generation system. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 is a schematic structural diagram of a gas distribution plate provided in an embodiment of the present invention;

[0019] Figure 2 It is a schematic diagram of the structure of the gas distribution plate hidden heat insulation bottom plate provided by an embodiment of the present invention;

[0020] Figure 3 It is a schematic diagram of the structure of a fuel cell power generation system provided in an embodiment of the present invention.

[0021] Among them, the reference numerals in the figure are:

[0022] 10—gas distribution plate 11—battery fixing area 12—heat exchange reforming area

[0023] 13 - Insulation top plate 14 - Heat conduction plate 15 - Insulation bottom plate

[0024] 20—air intake duct 21—air inlet 22—air outlet

[0025] 30 - fuel inlet flow channel 31 - fuel inlet 32 ​​- fuel outlet

[0026] 40 - gas outlet duct 41 - gas inlet 42 - gas outlet

[0027] 50 - exhaust gas outlet 51 - exhaust gas inlet 52 - exhaust gas outlet

[0028] 60—heat exchanger 61—fuel intake pipe 62—air intake pipe

[0029] 63—Water supply port 64—Air inlet 65—Smoke outlet

[0030] 70 - fuel cell stack 80 - burner 90 - reformer

[0031] 91—Fuel supply port. DETAILED DESCRIPTION

[0032] The preferred embodiments of the present invention are described in detail below in conjunction with the accompanying drawings, wherein the accompanying drawings constitute a part of this application and are used together with the embodiments of the present invention to illustrate the principles of the present invention, but are not used to limit the scope of the present invention.

[0033] An embodiment of the present invention provides a gas distribution structure, which simplifies the structure of the fuel cell power generation system and reduces the volume of the fuel cell power generation system by integrating a pipeline structure connected to the fuel cell stack of the fuel cell power generation system into a plate structure in the form of a flow channel.

[0034] like Figure 1~2As shown, the air distribution structure includes an air distribution plate 10, which is provided with an air intake channel 20, a fuel intake channel 30, an air inlet 21, an air outlet 22, a fuel inlet 31 and a fuel outlet 32, the fuel inlet 31 and the fuel outlet 32 ​​are both connected to the fuel intake channel 30, the air inlet 21 and the air outlet 22 are both connected to the air intake channel 20, the fuel inlet 31 and the air inlet 21 are used for connecting to the heat exchanger 60, and the fuel outlet 32 ​​and the air outlet 22 are provided for the fuel supply port 91 and the air supply port connected to the fuel cell stack 70.

[0035] Specifically, the air distribution structure is provided with an air distribution plate 10, and the air distribution plate 10 is provided with an air intake channel 20, a fuel intake channel 30, a fuel intake port 31, a fuel outlet 32, an air intake port 21 and an air outlet 22, the fuel intake port 31 and the fuel outlet 32 ​​are both connected to the fuel intake channel 30, the fuel required by the fuel cell stack 70 enters the fuel intake channel 30 through the fuel intake port 31, flows along the fuel intake channel 30, and enters the fuel cell stack 70 from the fuel outlet 32, the air intake port 21 and the air outlet 22 are both connected to the air intake channel 20, and the air required by the fuel cell stack 70 The air enters the air intake duct 20 through the air inlet 21, flows along the air intake duct 20, and enters the fuel cell stack 70 from the air outlet 22, thereby realizing the supply of air and fuel to the fuel cell stack 70. The fuel inlet 31 and the air inlet 21 can be connected to the heat exchanger 60, so that the air and fuel can be heated under the heat exchange of the heat exchanger 60 before being supplied to the fuel cell stack 70. Through the setting of the air distribution plate 10, the pipeline structure connected to the fuel cell stack 70 and the heat exchanger 60 can be integrated into the air distribution plate 10, thereby effectively simplifying the structure of the fuel cell power generation system and reducing the volume of the fuel cell power generation system.

[0036] like Figure 1 and 3 As shown, in one embodiment, the gas distribution plate 10 includes a battery fixing area 11, and a heat exchange reforming area 12 located on one side of the battery fixing area 11, the battery fixing area 11 is used to fix the fuel cell, the fuel outlet 32 ​​and the air outlet 22 are both located in the battery fixing area 11, the heat exchange reforming area 12 is used to fix the burner 80, and the fuel inlet 31 and the air inlet 21 are both located in the heat exchange reforming area 12. Specifically, by setting the gas distribution plate 10 as the battery fixing area 11 and the heat exchange reforming area 12, the fuel cell stack 70 and the reforming unit can be installed in different areas, so that the two areas perform different functions respectively, ensuring the stable operation of the fuel cell power generation system while making the structure of the fuel cell system more compact.

[0037] like Figure 1~2As shown, in one embodiment, the gas distribution plate 10 is further provided with a gas outlet flow channel 40, a gas inlet 41 and a gas outlet 42. The gas inlet 41 and the gas outlet 42 are respectively located in the battery fixing area 11 and the heat exchange reforming area 12 and are both connected to the gas outlet flow channel 40. The gas inlet 41 is connected to the exhaust port of the fuel cell stack 70, and is used to receive the excess fuel discharged by the fuel cell stack 70. The gas outlet 42 is connected to the burner 80. Specifically, the gas that does not participate in the work of the fuel cell stack 70 will be discharged from the exhaust port of the fuel cell stack 70, and enter the gas outlet flow channel 40 through the gas inlet 41, flow along the gas outlet flow channel 40 to the gas outlet 42, and then enter the burner 80 through the gas outlet 42 for combustion by the burner 80. Through the provision of the gas outlet flow channel 40, the exhaust pipes connected to the fuel cell stack 70 and the burner 80 can be concentrated in the gas distribution plate 10 in the form of a flow channel, thereby simplifying the structure of the fuel cell power generation system.

[0038] like Figure 1~2 As shown, in one of the embodiments, the gas distribution plate 10 is also provided with an exhaust gas outlet flow duct 50, an exhaust gas inlet 51 and an exhaust gas outlet 52, the gas inlet 41 and the gas outlet 42 are respectively located in the battery fixing area 11 and the heat exchange reforming area 12 and are both connected to the gas outlet flow duct 40, the exhaust gas inlet 51 is supplied to the exhaust port connected to the fuel cell stack 70, and is used to receive excess air discharged by the fuel cell stack 70, and the gas outlet 42 is supplied to connect the burner 80. Specifically, the air that does not participate in the work of the fuel cell stack 70 will be discharged through the exhaust port of the fuel cell stack 70, and enter the exhaust gas outlet flow duct 50 through the exhaust gas inlet 51, flow along the exhaust gas outlet flow duct 50 to the exhaust gas outlet 52, and then enter the burner 80 through the exhaust gas outlet duct 52 to be used for combustion by the burner 80. Through the setting of the exhaust gas outlet flow duct 50, the pipes connecting the fuel cell stack 70 and the burner 80 can be concentrated on the gas distribution plate 10 in the form of flow channels, thereby simplifying the structure of the fuel cell power generation system.

[0039] like Figures 1 to 3As shown, in one embodiment, the gas distribution plate 10 includes an insulating top plate 13 and a heat conducting plate 14, the insulating top plate 13 is provided with an installation cavity, the heat conducting plate 14 is installed in the installation cavity and fits with the side wall of the installation cavity, the air inlet flow channel 20, the fuel inlet flow channel 30, the gas outlet flow channel 40 and the exhaust gas outlet flow channel 50 are all arranged on the heat conducting plate 14, and the fuel inlet port 31, the fuel outlet port 32, the air inlet port 21, the air outlet port 22, the gas inlet port 41, the gas outlet port 42, the exhaust gas inlet port 51 and the exhaust gas outlet port 52 are all arranged on the insulating top plate 13. Specifically, by setting the air distribution plate 10 as an insulating top plate 13 and a heat conducting plate 14, and the air inlet flow channel 20, the fuel inlet flow channel 30, the gas outlet flow channel 40 and the exhaust gas outlet flow channel 50 are all set on the heat conducting plate 14, the exhaust gas heat discharged by the fuel cell stack 70 in the gas outlet flow channel 40 and the exhaust gas outlet flow channel 50 can be guided to the fuel and air introduced into the air inlet flow channel 20 and the fuel inlet flow channel 30 through the heat conducting plate 14, thereby increasing the temperature of the fuel and air introduced into the fuel cell stack 70, providing convenience for the operation of the fuel cell stack 70. At the same time, the insulating top plate 13 can prevent the heat of the fuel and air from diffusing to the working units such as the fuel cell stack 70, thereby preventing heat loss and ensuring the stable operation of the working units such as the fuel cell stack 70.

[0040] like Figure 1 and 3 As shown, in one of the embodiments, the gas distribution plate 10 also includes an insulating bottom plate 15, which is fixed to the bottom wall of the insulating top plate 13 and adheres to the side of the heat conducting plate 14 away from the insulating top plate 13. The insulating bottom plate 15 can seal the air inlet flow channel 20, the fuel inlet flow channel 30, the gas outlet flow channel 40 and the exhaust gas outlet flow channel 50, and prevent the heat of the heat conducting plate 14 from being lost to the outside.

[0041] like Figure 2 As shown, in one embodiment, the cross section of the air inlet flow channel 20 gradually increases toward the air outlet 22. Specifically, through this arrangement, the air can be gradually diffused during the flow toward the air outlet 22, so that the air can be evenly distributed to each fuel cell of the fuel cell stack 70.

[0042] like Figure 2As shown, in one embodiment, the width of the exhaust gas outlet flow channel 50 gradually increases toward the exhaust gas outlet port 52, and the depth of the exhaust gas outlet flow channel 50 gradually decreases toward the exhaust gas outlet port 52. Specifically, since the width of the exhaust gas outlet flow channel 50 gradually increases toward the exhaust gas outlet port 52, the exhaust gas can be gradually diffused toward the exhaust gas outlet port 52 during the flow process, so that the exhaust gas can flow evenly to the burner 80, and the depth of the exhaust gas outlet flow channel 50 gradually decreases toward the exhaust gas outlet port 52, which can effectively control the cross-sectional area of ​​the exhaust gas outlet flow channel 50, and further can better control the flow rate of the exhaust gas, so that the exhaust gas flows to the burner 80 at a uniform flow rate, and the stability of the operation of the burner 80 is ensured.

[0043] like Figure 3 As shown, an embodiment of the present invention further provides a fuel cell power generation system, including a heat exchanger 60, a fuel cell stack 70 and a gas distribution plate 10, the fuel outlet and the air outlet of the heat exchanger 60 are respectively connected to the fuel inlet 31 and the air inlet 21, and the fuel supply inlet 91 and the air supply inlet of the fuel cell stack 70 are respectively connected to the fuel inlet 31 and the air outlet 22.

[0044] Specifically, the fuel cell power generation system is provided with a heat exchanger 60, a fuel cell stack 70 and a gas distribution plate 10. During the operation of the fuel cell power generation system, the fuel and air required for the operation of the fuel cell stack 70 enter the heat exchanger 60, and after heat exchange and temperature increase in the heat exchanger 60, enter the air intake flow channel 20 and the fuel intake flow channel 30 from the fuel outlet and the air outlet respectively, and then flow along the air intake flow channel 20 and the fuel intake flow channel 30, and enter each fuel cell of the fuel cell stack 70 through the fuel supply inlet 91 and the air supply inlet of the fuel cell stack 70, so as to be used by the fuel cell. By providing the gas distribution plate 10, the fuel cell power generation system can integrate the pipeline structure connected with the fuel cell stack 70 and the heat exchanger 60 into the gas distribution plate 10, thereby effectively simplifying the structure of the fuel cell power generation system and reducing the volume of the fuel cell power generation system.

[0045] In this embodiment, the fuel outlet and the air outlet of the heat exchanger 60 are communicated with the fuel inlet 31 and the air inlet 21 through the fuel inlet pipe 61 and the air inlet pipe 62 respectively.

[0046] like Figure 3As shown, in one embodiment, the fuel cell power generation system further includes a burner 80, which is fixed to the heat exchange reforming zone 12 and communicated with the gas outlet 42 and the tail gas outlet 52, and is used to burn the gas supplied from the gas outlet 42, and the heat exchanger 60 is fixed to the burner 80. Specifically, the fuel and air that do not participate in the reaction of the fuel cell stack 70 will enter the burner 80 through the gas outlet flow channel 40 and the tail gas outlet flow channel 50 respectively, so as to be burned by the burner 80. By connecting the burner 80 with the gas outlet 42 and the tail gas outlet 52, the fuel and air that do not participate in the reaction of the fuel cell stack 70 can be reused, and the required heat can be provided for the heat exchange of the heat exchanger 60, thereby realizing full utilization of the preheating of the fuel cell stack 70 with a relatively simple structure.

[0047] like Figure 3 As shown, in one embodiment, the fuel cell power generation system further includes a reformer 90, the reformer 90 is fixed to the heat exchanger 60, the heat exchanger 60 is provided with a water supply port 63, the water supply port 63 is used to supply water to the heat exchanger 60, the heat exchanger 60 is used to heat the water body through the flue gas supplied by the burner 80 to form steam, and the heat exchanger 60 is used to reform the fuel through steam. Specifically, the water body enters the heat exchanger 60 through the water supply port 63, and forms high-temperature steam under the heat supply of the heat exchanger 60. The high-temperature steam enters the reformer 90 and mixes with the fuel introduced into the reformer 90, thereby reforming the fuel to form the fuel gas required for the operation of the fuel cell stack 70.

[0048] In this embodiment, the reformer 90 is provided with a fuel supply inlet 91 , and the fuel required for reforming can be introduced into the reformer 90 through the fuel supply inlet 91 .

[0049] like Figure 3 As shown, in one embodiment, the reformer 90 is attached to the side wall of the heat exchanger 60, so as to provide the required heat for the reforming of the reformer 90 through the heat transfer of the side wall of the heat exchanger 60, while maintaining the uniformity of the heat inside the reformer 90 to improve the reforming quality of the fuel. The tail gas outlet of the reformer 90 is connected to the inside of the heat exchanger 60. The fuel gas formed after the reforming of the reformer 90 can enter the heat exchanger 60 for heat exchange and temperature rise, and then enter the fuel intake flow channel 30.

[0050] like Figure 3 As shown, in one embodiment, the heat exchanger 60 is further provided with an air inlet 64 , which is connected to the air inlet 21 for supplying air to the heat exchanger 60 . The heat exchanger 60 is also used to heat the air through the flue gas supplied by the burner 80 .

[0051] like Figure 3As shown, in this embodiment, the heat exchanger 60 is also provided with a smoke outlet 65. The high-temperature smoke generated by the burner 80 enters the heat exchanger 60, exchanges heat with the water, fuel and air in the heat exchanger 60, and is discharged from the smoke outlet 65.

[0052] The working principle of the fuel cell power generation system provided by the embodiment of the present invention is as follows: when the fuel cell power generation system is working, the fuel is introduced into the reformer 90 through the fuel supply inlet 91, and the water enters the heat exchanger 60 through the water supply inlet 63. High-temperature steam is formed under the heat supply of the heat exchanger 60. The high-temperature steam enters the reformer 90, mixes with the fuel in the reformer 90, and is reformed through the catalyst bed of the reformer 90 to form the fuel gas required for the operation of the fuel cell stack 70. After the fuel gas enters the heat exchanger 60 through the fuel gas, it is heated and heated, and then enters the fuel intake flow channel 30 through the fuel intake pipe 61. The air enters the heat exchanger 60 through the air inlet 64. After the air exchange is heated and heated by the heat exchanger 60, it enters the air intake flow channel 20 from the air intake pipe 62. The air and the gas flow along the air intake flow channel 20 and the fuel intake flow channel 30, and enter each fuel cell of the fuel cell stack 70 through the fuel supply inlet 91 and the air supply inlet of the fuel cell stack 70, so that the fuel cell stack 70 generates electricity.

[0053] The fuel gas and exhaust gas that are not involved in the operation of the fuel cell stack 70 enter the burner 80 through the fuel gas outlet flow channel 40 and the exhaust gas outlet flow channel 50 respectively for combustion by the burner 80. The high-temperature flue gas generated by the combustion of the burner 80 enters the heat exchanger 60. The heat of the high-temperature flue gas is exchanged with the water, fuel and air in the heat exchanger 60 and then discharged from the flue gas outlet 65, thereby realizing the utilization of the heat of the high-temperature flue gas.

[0054] By arranging the heat exchanger 60, fuel cell stack 70, gas distribution plate 10, burner 80 and reformer 90 of the fuel cell power generation system, it is possible to achieve full utilization of the system heat with a simplified structure while achieving normal power generation, thereby reducing the volume of the fuel cell power generation system and reducing the assembly cost of the fuel cell power generation system.

[0055] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any changes or substitutions that can be easily conceived by any technician familiar with the technical field within the technical scope disclosed by the present invention should be covered within the protection scope of the present invention.

Claims

1. A gas distribution structure, characterized in that: The invention comprises an air distribution plate, wherein the air distribution plate is provided with an air intake channel, a fuel intake channel, a fuel intake port, a fuel outlet, an air intake port and an air outlet, wherein the fuel intake port and the fuel outlet are both communicated with the fuel intake channel, the air intake port and the air outlet are both communicated with the air intake channel, the fuel intake port and the air intake port are used to connect to a heat exchanger, and the fuel outlet and the air outlet are used to connect to a fuel supply port and an air supply port of a fuel cell stack, respectively; The gas distribution plate includes a battery fixing area and a heat exchange reforming area located on one side of the battery fixing area, the battery fixing area is used to fix the fuel cell, the fuel outlet and the air outlet are both located in the battery fixing area, the heat exchange reforming area is used to fix the burner, and the fuel inlet and the air inlet are both located in the heat exchange reforming area; The gas distribution plate is also provided with a gas outlet flow channel, a gas inlet and a gas outlet, the gas inlet and the gas outlet are respectively located in the battery fixing area and the heat exchange reforming area and are both communicated with the gas outlet flow channel, the gas inlet is connected to the exhaust port of the fuel cell stack, and is used to receive the excess fuel discharged by the fuel cell stack, and the gas outlet is connected to the burner; The gas distribution plate includes a heat-insulating top plate and a heat-conducting plate, the heat-insulating top plate is provided with an installation cavity, the heat-conducting plate is installed in the installation cavity and fits with the side wall of the installation cavity, the air inlet flow channel, the fuel inlet flow channel and the gas outlet flow channel are all arranged on the heat-conducting plate, and the fuel inlet, the fuel outlet, the air inlet, the air outlet, the gas inlet and the gas outlet are all arranged on the heat-insulating top plate.

2. The gas distribution structure according to claim 1, characterized in that: The gas distribution plate is also provided with an exhaust gas outlet flow channel, an exhaust gas inlet and an exhaust gas outlet. The gas inlet and the gas outlet are respectively located in the battery fixing area and the heat exchange reforming area and are both connected to the gas outlet flow channel. The exhaust gas inlet is supplied to the exhaust port connected to the fuel cell stack, and is used to receive excess air discharged from the fuel cell stack. The gas outlet is supplied to the burner.

3. The gas distribution structure according to claim 1, characterized in that: The cross section of the air inlet flow passage gradually increases toward the air outlet.

4. A fuel cell power generation system, characterized in that: It comprises a heat exchanger, a fuel cell stack and the air distribution plate as claimed in claim 2, wherein the fuel outlet and the air outlet of the heat exchanger are respectively connected to the fuel inlet and the air inlet, and the fuel supply inlet and the air supply inlet of the fuel cell stack are respectively connected to the fuel inlet and the air outlet.

5. The fuel cell power generation system according to claim 4, characterized in that: The fuel cell power generation system also includes a burner, which is fixed to the heat exchange reforming zone and connected to the gas outlet and the exhaust gas outlet, and is used to burn the gas supplied from the gas outlet. The heat exchanger is fixed to the burner.

6. The fuel cell power generation system according to claim 5, characterized in that: The fuel cell power generation system also includes a reformer, which is fixed to the heat exchanger. The heat exchanger is provided with a water supply port, which is used to supply water to the heat exchanger. The heat exchanger is used to heat the water body through the flue gas supplied by the burner to form steam, and the heat exchanger is used to reform the fuel through the steam.

7. The fuel cell power generation system according to claim 6, characterized in that: The heat exchanger is also provided with an air inlet, which is communicated with the air inlet and is used to supply air to the heat exchanger. The heat exchanger is also used to heat the air through the flue gas supplied by the burner.

Images