Power generation hot area module and fuel cell

Abstract

The utility model relates to a power generation hot area module and a fuel cell, the power generation hot area module comprises a cell stack and a heat exchange module, the cell stack and the heat exchange module are arranged in a thermal insulation shell, and the cell stack is provided with a hydrogen inlet used for being connected with hydrogen production equipment outside the thermal insulation shell. The power generation hot area module does not need to be damaged when the hydrogen production equipment is replaced or repaired; the heat exchange module comprises a combustor and a first heat exchanger, an exhaust port of the cell stack is connected with a power generation waste gas inlet of the combustor, the combustor is connected with a combustion hot gas inlet of the first heat exchanger, the combustor ignites power generation waste gas to enable combustion hot gas to enter the first heat exchanger, and the first heat exchanger is provided with a cold gas inlet and a hot gas outlet. A hot air outlet in the hot gas outlet is connected with the cell stack through a pipeline to preheat air entering the cell stack, so that the resource utilization rate is increased; in the fuel cell applying the power generation hot area module, the power generation hot area module and the hydrogen production equipment are independently arranged, and only a connecting pipeline needs to be disconnected during maintenance and replacement.

Description

Technical Field

[0001] This utility model relates to the field of fuel cell technology, specifically to a power generation hot zone module and a fuel cell. Background Technology

[0002] Fuel cells are devices that convert the chemical energy of hydrogen and oxygen into electrical energy. They have a much higher efficiency than heat engines and produce less pollution, and are considered the best future development direction for energy power modules.

[0003] A typical high-efficiency fuel cell's power generation heat zone includes the fuel cell stack area, a combustion heat exchange module, and a hydrogen production module. The hydrogen production module and the combustion heat exchange module are integrated together, and the location of the hydrogen production module during integration is determined by the temperature range in which it is used. In this integrated design, the catalyst of the hydrogen production module is difficult to replace, and the entire hydrogen production module is also inconvenient to disassemble and replace. Generally, the hydrogen production module is disposable. Summary of the Invention

[0004] The purpose of this invention is to develop a power generation thermal zone module and a fuel cell, which features a separate layout design for the power generation thermal zone module and an external hydrogen production device. This eliminates the need to disassemble the power generation thermal zone module when replacing the catalyst, thereby improving the utilization rate of the device.

[0005] This utility model is achieved through the following technical solution:

[0006] A power generation hot zone module and fuel cell include a battery stack and a heat exchange module, wherein the battery stack and the heat exchange module are disposed within an insulated shell. The battery stack has a hydrogen inlet for connection to a hydrogen production device outside the insulated shell. The heat exchange module includes a burner and a first heat exchanger. The exhaust port of the battery stack is connected to the power generation exhaust gas inlet of the burner, and the burner is connected to the combustion hot gas inlet of the first heat exchanger. The first heat exchanger is provided with a cold gas inlet and a hot gas outlet, and the hot air outlet of the hot gas outlet is connected to the battery stack through a pipe.

[0007] The beneficial effects of the above technical solution are as follows: integrating the battery stack and heat exchange module into the insulation shell is beneficial for concentrating and fully utilizing heat; the battery stack is equipped with a hydrogen inlet for connecting to an external hydrogen production device, so that the battery stack and heat exchange module do not need to be damaged when replacing or repairing the hydrogen production device; at the same time, the exhaust gas generated by the battery stack enters the burner in the heat exchange module for ignition and heating, and the combustion hot gas enters the first heat exchanger for heating the gas, which can preheat the air entering the battery stack. In this way, the exhaust gas (containing hydrogen) is used for heating, thus improving the resource utilization rate.

[0008] Preferably, the heat exchange module further includes a second heat exchanger. The first heat exchanger is connected to the combustion exhaust gas inlet of the second heat exchanger. The second heat exchanger is provided with a cold water inlet, a hot water outlet, and a combustion exhaust gas outlet. The second heat exchanger further exchanges heat for the combustion exhaust gas output from the first heat exchanger and can be used as a water heater. Replacing the water in the second heat exchanger with other coolants is an equivalent replacement in this solution.

[0009] Preferably, the burner and the first heat exchanger are arranged side by side on one side of the battery stack, the second heat exchanger is arranged on the side of the first heat exchanger away from the battery stack, and the hydrogen inlet and gas delivery pipeline are arranged on the top of the battery stack. The above structural layout design is reasonable and effectively improves space utilization.

[0010] Preferably, the exhaust ports of the battery stack include a waste hydrogen exhaust port and a waste air exhaust port, and the power generation exhaust gas inlet of the burner includes a waste hydrogen inlet and a waste air inlet; the waste hydrogen exhaust port is connected to the waste hydrogen inlet of the burner, and the waste air exhaust port is connected to the waste air inlet of the burner, and is ignited by the ignition needle of the burner.

[0011] Preferably, the battery stack is equipped with an electric heating furnace for heating it. The area where the battery stack is located is surrounded by the electric heating furnace, which heats the battery stack to meet the conditions for power generation.

[0012] Preferably, the insulation shell includes a thermal insulation top seat and a thermal insulation top cover located on top of the battery stack. The thermal insulation top seat insulates the air intake pipe of the battery stack. The hydrogen inlet is located on the thermal insulation top cover or exposed outside the thermal insulation top cover, so as to facilitate the replacement or maintenance of the hydrogen production equipment connected to the power generation thermal zone module without disassembling the insulation shell.

[0013] This utility model also provides a fuel cell, including the aforementioned power generation hot zone module and hydrogen production equipment. In this fuel cell, the power generation hot zone module and the hydrogen production equipment are independent of each other and connected by pipelines, which facilitates the disassembly and maintenance of the hydrogen production equipment, the replacement of the catalyst, and the replacement of the hydrogen production equipment, making it convenient to study the impact of different hydrogen production modes on the power generation efficiency of the fuel cell stack.

[0014] Preferably, the hydrogen production equipment of the fuel cell is an ammonia cracking device. The cold gas inlet on the first heat exchanger includes a cold ammonia inlet and a cold air inlet, and the hot gas outlet on the first heat exchanger includes a hot ammonia outlet and a hot air outlet. The hot ammonia outlet is connected to the ammonia cracking device located outside the insulation shell through a pipeline, and the hot air outlet is connected to the battery stack through a pipeline. The above structure can preheat the ammonia used for cracking to produce hydrogen and the air used for power generation.

[0015] Preferably, the heat-insulating shell includes a heat exchange module heat-insulating shell covering the heat exchange module, and the cold ammonia inlet, cold air inlet, and hot ammonia outlet are located on the heat exchange module heat-insulating shell or exposed outside the heat exchange module heat-insulating shell to facilitate connection to a hydrogen production device located outside the heat-insulating shell. Attached Figure Description

[0016] Figure 1 A schematic diagram of the power generation thermal zone module provided by this utility model;

[0017] Figure 2 for Figure 1 A schematic diagram of the structure of the power generation thermal zone module after it is hidden in the insulation shell;

[0018] Figure 3 for Figure 2 A schematic diagram of the structure of the power generation heat zone module hidden behind the electric heating furnace;

[0019] Figure 4 for Figure 3 Another structural diagram of the power generation thermal zone module in the middle;

[0020] Figure 5 A schematic diagram of the burner provided by this utility model;

[0021] Figure 6 A schematic diagram of the structure of the first heat exchanger provided by this utility model;

[0022] Figure 7 This is a schematic diagram of the structure of the second heat exchanger provided by this utility model;

[0023] Figure 8 A block diagram of gas delivery for the fuel cell provided by this utility model;

[0024] In the diagram, 1. Battery stack; 11. Battery stack base plate; 12. Hydrogen inlet; 13. Conductive column; 14. Electric heating furnace; 2. Burner; 21. Ignition needle; 22. Backup ignition port; 23. Waste hydrogen inlet; 24. Waste air inlet; 31. First heat exchanger; 311. Cold ammonia inlet; 312. Cold air inlet; 313. Hot ammonia outlet; 314. Hot air outlet; 315. Combustion hot gas inlet; 32. Second heat exchanger; 321. Cold water inlet; 322. Hot water outlet; 323. Combustion exhaust gas outlet; 324. Combustion tail gas inlet; 4. Insulation shell; 41. Hot zone insulation top cover; 42. Hot zone insulation top seat; 43. Heat exchange module insulation shell. Detailed Implementation

[0025] First, those skilled in the art should understand that the following embodiments are merely used to explain the technical principles of the embodiments of this application and are not intended to limit the scope of protection of the embodiments of this application. Those skilled in the art can make adjustments as needed to adapt to specific application scenarios.

[0026] In the description of the embodiments of this application, it should be noted that, unless otherwise explicitly specified and limited, the terms "connected" and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in the embodiments of this application based on the specific circumstances.

[0027] In the embodiments of this application, unless otherwise expressly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0028] To make the objectives, features and advantages of this utility model more apparent and understandable, the specific embodiments are described in detail below with reference to the accompanying drawings.

[0029] like Figures 1 to 6 As shown, this embodiment provides a power generation thermal zone module, including a battery stack 1 and a heat exchange module. The battery stack 1 and the heat exchange module are disposed within an insulation shell 4. The battery stack 1 has a hydrogen inlet 12 for connecting to a hydrogen production device outside the insulation shell 4, and the hydrogen inlet 12 extends out of the insulation shell 4 through a pipe. The battery stack 1 has conductive pillars 13, and an electric heating furnace 14 is provided to heat the battery stack 1. The area where the battery stack 1 is located is surrounded by the electric heating furnace 14, which heats the battery stack 1 to meet the power generation conditions. The heat exchange module includes a burner. 2 and the first heat exchanger 31; the exhaust port of the battery stack 1 is connected to the power generation exhaust gas inlet of the burner 2, and the burner 2 is connected to the combustion hot gas inlet 315 of the first heat exchanger 31; the first heat exchanger 31 is provided with a cold gas inlet and a hot gas outlet, and the hot air outlet 314 of the hot gas outlet is connected to the battery stack 1 through a pipe. In this way, the hydrogen exhaust gas generated by the battery stack 1 enters the burner in the heat exchange module for ignition and heating, and the combustion hot gas enters the first heat exchanger to heat the gas, which can preheat the air input to the battery stack 1 and improve resource utilization.

[0030] In the above embodiment, the battery stack area where the battery stack 1 is located is enclosed by an electric heating furnace 14. The electric heating furnace 14 serves as both a start-up heating source and an insulation box. This battery stack area integrates four battery stacks 1 located on the base plate 11 of the battery stack area and has two gas distribution pipelines for air and hydrogen. (Refer to...) Figure 5 The burner 2 has a waste hydrogen inlet 23 and a waste air inlet 24, as well as an ignition needle 21. The ignition needle 21 ignites the hydrogen and air remaining from the power generation of the fuel cell stack and burns them into combustion heat.

[0031] In one embodiment, a second heat exchanger 32 is also provided (see reference 32). Figure 7 The combustion exhaust gas from the first heat exchanger 31 enters the second heat exchanger 32 through the combustion exhaust gas inlet 324. The second heat exchanger 32 is equipped with a cold water inlet 321, a hot water outlet 322, and a combustion exhaust gas outlet 323. After being cooled by heat exchange in the first heat exchanger 31, the combustion exhaust gas enters the second heat exchanger (water heater) 32 for further cooling. The waste heat is used to heat the hot water (cold water outside the insulation shell enters through the cold water inlet 321, and after heat exchange with the combustion exhaust gas in the second heat exchanger 32, it becomes hot water and flows out of the insulation shell through the hot water outlet 322). Finally, the combustion exhaust gas is discharged as cold exhaust gas, which can improve the efficiency and resource utilization of the entire system.

[0032] In one embodiment, the burner 2 and the first heat exchanger 31 are arranged side by side on one side of the battery stack 1, and the second heat exchanger 32 is arranged on the side of the first heat exchanger 31 away from the battery stack 1. The first heat exchanger 31 separates the battery stack 1 from the second heat exchanger 32. The hydrogen inlet 12 and the gas delivery pipe are arranged on the top of the battery stack 1. The above structural layout makes the heat distribution reasonable and effectively improves the space utilization rate.

[0033] In one embodiment, the exhaust port of the battery stack 1 includes a waste hydrogen exhaust port and a waste air exhaust port, and the power generation exhaust gas inlet of the burner 2 includes a waste hydrogen inlet 23 and a waste air inlet 24. The waste hydrogen exhaust port is connected to the waste hydrogen inlet 23 of the burner, and the waste air exhaust port is connected to the waste air inlet 24 of the burner 2. Ignition is performed by the ignition needle 21 of the burner 2. In this embodiment, the burner 2 also has a spare ignition port 22.

[0034] In one embodiment, the insulation shell 4 includes a thermal insulation top seat 42 and a thermal insulation top cover 41 located on top of the battery stack 1. The hydrogen inlet 12 is opened on the thermal insulation top cover 41 or extends through a pipe and is exposed outside the thermal insulation top cover 41. The thermal insulation top seat 42 insulates the gas inlet pipe of the battery stack 1 so as to facilitate the replacement or maintenance of the hydrogen production equipment connected to the power generation thermal zone module without disassembling the insulation shell.

[0035] An embodiment of a fuel cell is also provided, with reference to Figure 8 The hydrogen production equipment for this fuel cell is mainly an ammonia cracking hydrogen production device. This ammonia cracking hydrogen production device is combined with the power generation hot zone module provided in any of the aforementioned embodiments, so that the first heat exchanger 31 preheats the ammonia gas input into the ammonia cracking hydrogen production device. The specific structure is as follows: the cold gas inlet on the first heat exchanger 31 includes a cold ammonia gas inlet 311 and a cold air inlet 312, and the hot gas outlet on the first heat exchanger 31 includes a hot ammonia gas outlet 313 and a hot air outlet 314. The hot ammonia gas outlet 313 is connected to the ammonia cracking hydrogen production device located outside the insulation shell 4 through a pipeline, and the hot air outlet 314 is connected to the battery stack 1 through a pipeline. In operation, burner 2 mixes and burns the hydrogen and air remaining from the power generation of the fuel cell stack to produce combustion heat. The combustion heat enters the first heat exchanger 31 through combustion heat inlet 315, heating the newly entering fresh air (entering through cold air inlet 312) and cold ammonia (entering through cold ammonia inlet 311). The heated air enters the fuel cell stack 1 through hot air outlet 314 to generate electricity. The hot ammonia enters the ammonia cracking unit through a pipe connected to the hot ammonia outlet 313 to produce hydrogen. The hydrogen produced by the ammonia cracking is then transported through a pipe to the hydrogen inlet 12 of the fuel cell stack 1 for power generation.

[0036] Furthermore, the heat exchange module insulation shell 4 includes a heat exchange module insulation shell 43 covering the heat exchange module. The cold ammonia inlet 311, cold air inlet 312, and hot ammonia outlet 313 are exposed outside the heat exchange module insulation shell 43 to facilitate connection with the ammonia cracking hydrogen production device.

[0037] In the description of this application, the reference to terms such as "this embodiment," "an embodiment," etc., means that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in a suitable manner in any one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0038] The above description is merely a specific embodiment of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. A power generation hot zone module, comprising a cell stack (1) and a heat exchange module, characterized in that: the cell stack (1) and the heat exchange module are arranged in a heat preservation shell (4), the cell stack (1) has a hydrogen inlet (12) for connecting with a hydrogen production device outside the heat preservation shell (4); the heat exchange module comprises a burner (2) and a first heat exchanger (31); an exhaust port of the cell stack (1) is connected to a power generation exhaust gas inlet of the burner (2), the burner (2) is connected to a combustion hot gas inlet (315) of the first heat exchanger (31); a cold gas inlet and a hot gas outlet are arranged on the first heat exchanger (31), and a hot air outlet (314) in the hot gas outlet is connected to the cell stack (1) by a pipeline. The heat exchange module further comprises a second heat exchanger (32), the first heat exchanger (31) is connected to a combustion tail gas inlet (324) of the second heat exchanger (32), and a cold water inlet (321), a hot water outlet (322) and a combustion exhaust gas outlet (323) are arranged on the second heat exchanger (32).

2. The power zone module of claim 1, wherein: The burner (2) and the first heat exchanger (31) are arranged side by side on one side of the cell stack (1), the second heat exchanger (32) is arranged on the side of the first heat exchanger (31) away from the cell stack (1), and the hydrogen inlet (12) is arranged on the top of the cell stack (1).

3. The power zone module of claim 2, wherein: The exhaust port of the cell stack (1) comprises a waste hydrogen exhaust port and a waste air exhaust port, and the power generation exhaust gas inlet of the burner (2) comprises a waste hydrogen inlet (23) and a waste air inlet (24).

4. The power zone module of claim 1, wherein: The cell stack (1) is arranged in cooperation with an electric heating furnace (14) for heating the cell stack (1).

5. The power zone module of claim 1, wherein: The heat preservation shell (4) comprises a hot zone heat preservation top seat (42) and a hot zone heat preservation top cover (41) arranged on the top of the cell stack (1), and the hydrogen inlet (12) is arranged on the hot zone heat preservation top cover (41) or exposed outside the hot zone heat preservation top cover (41).

6. The power zone module of claim 1, wherein:

7. A fuel cell comprising the power generation hot zone module according to any one of claims 1-6. The hydrogen production device is an ammonia cracking device, the cold gas inlet of the first heat exchanger (31) comprises a cold ammonia inlet (311) and a cold air inlet (312), and the hot gas outlet of the first heat exchanger (31) comprises a hot ammonia outlet (313) and a hot air outlet (314); 8. The fuel cell of claim 7, comprising a hydrogen production device, characterized by: The hot ammonia outlet (313) is connected to the ammonia cracking device outside the heat preservation shell (4) by a pipeline, and the hot air outlet (314) is connected to the cell stack (1) by a pipeline. The heat preservation shell (4) comprises a heat exchange module heat preservation shell (43) covering the heat exchange module, and the cold ammonia inlet (311), the cold air inlet (312) and the hot ammonia outlet (313) are arranged on the heat exchange module heat preservation shell (43) or exposed outside the heat exchange module heat preservation shell (43).

9. The fuel cell of claim 8, wherein: ​

Images