A PEM fuel cell with exhaust gas recirculation

Abstract

This utility model relates to the field of PEM fuel cell technology and discloses a PEM fuel cell with exhaust gas recirculation, including a mixing chamber, a reinforcement component fixedly installed on the side wall of the mixing chamber, and a processing assembly disposed on the side of the mixing chamber. The processing assembly includes a circulation mechanism disposed on the side of the mixing chamber, and a separation mechanism disposed on the side of the mixing chamber. The separation mechanism is connected to the circulation mechanism. The circulation mechanism includes a support plate fixedly installed on the side wall of the mixing chamber, a pre-humidifier fixedly installed on the top of the support plate, and a control valve pipe fixedly installed on the top of the pre-humidifier. This utility model solves the problem that in existing PEM fuel cells, only a small portion of the air introduced into the cathode participates in the reaction, while the remaining unreacted oxygen, water vapor, and inert nitrogen are directly discharged with the exhaust gas, resulting in a waste of oxygen resources.

Description

Technical Field

[0001] This utility model relates to the field of PEM fuel cell technology, specifically to a PEM fuel cell with exhaust gas recirculation. Background Technology

[0002] PEM fuel cell, short for proton exchange membrane fuel cell, is a clean power generation device that uses a proton exchange membrane (PEM) as the core electrolyte. It directly converts chemical energy into electrical energy through an electrochemical reaction in which hydrogen (H2) is oxidized at the anode and oxygen (O2, usually from the air) is reduced at the cathode. Its core features are "proton conduction" (only protons are allowed to pass through the electrolyte membrane, while electrons form an electric current through the external circuit) and "low-temperature efficiency" (the operating temperature is usually 40-80℃, and the start-up speed is fast). It does not require a combustion process, only produces water and a small amount of heat, and has no pollutant emissions. It is widely used in vehicle power (such as new energy vehicles), distributed power generation (such as home / industrial backup power), portable power (such as power supply for outdoor equipment), and other scenarios. Therefore, a PEM fuel cell with exhaust gas recirculation is required. In existing PEM fuel cells, only a small portion of the air introduced into the cathode participates in the reaction, while the remaining unreacted oxygen, water vapor, and inert nitrogen are directly emitted with the exhaust gas, resulting in a waste of oxygen resources. Summary of the Invention

[0003] The purpose of this invention is to provide a PEM fuel cell with exhaust gas recirculation, thereby solving the problems mentioned in the background art.

[0004] To achieve the above objectives, this utility model provides the following technical solution: a PEM fuel cell with exhaust gas recirculation, comprising a mixing chamber. Reinforcing members fixedly installed on the side wall of the mixing chamber; And a processing assembly located on the side of the mixing chamber; The processing assembly includes a circulation mechanism located on the side of the mixing chamber; A separation mechanism is provided on the side of the mixing chamber, and the separation mechanism is connected to the circulation mechanism.

[0005] Preferably, a discharge pipe is fixedly installed on the top of the mixing chamber, and a sealing plug is slidably installed on the inner wall of the discharge pipe.

[0006] Preferably, the circulation mechanism includes a support plate, which is fixedly installed on the side wall of the mixing chamber. A pre-humidifier is fixedly installed on the top of the support plate, and a control valve pipe is fixedly installed on the top of the pre-humidifier. The other end of the control valve pipe is fixedly connected to the side wall of the mixing chamber. A socket block is fixedly installed on the side wall of the pre-humidifier, and the side wall of the socket block is fixedly connected to the side wall of the mixing chamber. A circulation pump is fixedly installed on the top of the support plate, and a connector is fixedly installed on one end of the circulation pump. A connecting pipe is fixedly installed on the side wall of the connector, and the other end of the connecting pipe is fixedly connected to the side wall of the mixing chamber. A transport pipe is fixedly installed on the side wall of the connector.

[0007] Preferably, the inner wall of the pre-humidifier is connected to the inside of the control valve pipe, the inner wall of the connector is connected to the inside of the connecting pipe, and the inner wall of the connector is connected to the inside of the transport pipe.

[0008] Preferably, the separation mechanism includes a second support plate, which is fixedly installed on the side wall of the mixing chamber. A steam-water separator is fixedly installed on the top of the second support plate, a support block is fixedly installed on the top of the steam-water separator, a condenser is fixedly installed on the top of the support block, an arc-shaped tube is fixedly installed on the side wall of the condenser, the other end of the arc-shaped tube is fixedly connected to the side wall of the steam-water separator, a discharge hopper is fixedly installed on the side wall of the steam-water separator, and the other end of the discharge hopper is fixedly connected to the side wall of the transport pipe.

[0009] Preferably, the inner wall of the condenser is connected to the interior of the arc-shaped tube, the inner wall of the arc-shaped tube is connected to the interior of the steam-water separator, and the inner wall of the steam-water separator is connected to the interior of the discharge hopper.

[0010] Preferably, there are four reinforcing components, all of which are of equal shape and size, and are fixedly installed at equal intervals on the side wall of the mixing chamber.

[0011] This invention provides a PEM fuel cell with exhaust gas recirculation. It has the following advantages: (1) In this utility model, the operator turns on the circulation pump, and the circulation pump transports the "oxygen-enriched gas" after gas-water separation to the inner wall of the connecting pipe through the transport pipe, and further transports it to the inner wall of the mixing chamber. The mixing chamber is connected to the outlet of the pre-humidifier of the cathode gas supply system, and the recirculated gas and fresh compressed air are mixed in a certain proportion and sent into the cathode of the fuel cell stack to realize the "water-gas" synergistic utilization and realize the recycling unit and the water recycling unit.

[0012] (2) When the operator uses the device, the condenser exchanges heat with the exhaust through cooling water to condense the water vapor in the exhaust into liquid water. The steam-water separator adopts a cyclone separation structure to further separate the residual mist water droplets, so as to avoid the liquid water entering the subsequent pipeline and causing corrosion or blockage. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the appearance and structure of this utility model; Figure 2 This is a side view of the present invention. Figure 3 This is a schematic diagram of the structure of the circulation mechanism of this utility model; Figure 4 This is a schematic diagram of the separation mechanism of this utility model.

[0014] In the diagram: 1. Mixing chamber; 2. Reinforcing component; 3. Sealing plug; 4. Processing assembly; 41. Circulation mechanism; 411. Connecting block; 412. Pre-humidifier; 413. Control valve pipe; 414. Support plate one; 415. Circulation pump; 416. Connector; 417. Connecting pipe; 418. Transport pipe; 42. Separation mechanism; 421. Condenser; 422. Support block; 423. Gas-water separator; 424. Arc-shaped pipe; 425. Discharge hopper; 426. Support plate two; 5. Discharge pipe. Detailed Implementation

[0015] To provide a clearer understanding of the technical features, objectives, and effects of this utility model, the specific embodiments of this utility model are now described with reference to the accompanying drawings.

[0016] Example 1: A preferred embodiment of the PEM fuel cell with exhaust gas recirculation provided by this utility model is as follows: Figures 1 to 4 As shown: A PEM fuel cell with exhaust gas recirculation includes a mixing chamber 1, a discharge pipe 5 fixedly installed on the top of the mixing chamber 1, and a sealing plug 3 slidably installed on the inner wall of the discharge pipe 5. Four reinforcement members 2 are fixedly installed on the side wall of the mixing chamber 1. The four reinforcement members 2 are all the same in shape and size and are fixedly installed at equal intervals on the side wall of the mixing chamber 1. And the processing component 4 is located on the side of the mixing chamber 1; Processing component 4 includes a circulation mechanism 41 located on the side of mixing chamber 1; A separation mechanism 42 is provided on the side of the mixing chamber 1, and the separation mechanism 42 is connected to the circulation mechanism 41.

[0017] The circulation mechanism 41 includes a support plate 414, which is fixedly installed on the side wall of the mixing chamber 1. A pre-humidifier 412 is fixedly installed on the top of the support plate 414. A control valve pipe 413 is fixedly installed on the top of the pre-humidifier 412. The other end of the control valve pipe 413 is fixedly connected to the side wall of the mixing chamber 1. A socket block 411 is fixedly installed on the side wall of the pre-humidifier 412. The side wall of the socket block 411 is fixedly connected to the side wall of the mixing chamber 1. A circulation pump 415 is fixedly installed on the top of the support plate 414. A connector 416 is fixedly installed on one end of the circulation pump 415. A connecting pipe 417 is fixedly installed on the side wall of the connector 416. The other end of the connecting pipe 417 is fixedly connected to the side wall of the mixing chamber 1. A transport pipe 418 is fixedly installed on the side wall of the connector 416.

[0018] In this embodiment, the inner wall of the pre-humidifier 412 is connected to the inside of the control valve pipe 413, the inner wall of the connector 416 is connected to the inside of the connecting pipe 417, and the inner wall of the connector 416 is connected to the inside of the transport pipe 418.

[0019] In the specific implementation process, the operator turns on the circulation pump 415. The circulation pump 415 delivers the "oxygen-enriched gas" after gas-water separation to the inner wall of the connecting pipe 417 through the transport pipe 418, and further transports it to the inner wall of the mixing chamber 1. The mixing chamber 1 is connected to the outlet of the pre-humidifier 412 of the cathode gas supply system, and mixes the recirculated gas with fresh compressed air in a certain proportion and sends it into the cathode of the fuel cell stack to realize the "water-gas" synergistic utilization and realize the recycling unit and water recycling unit.

[0020] Example 2: Based on Example 1, a preferred embodiment of the PEM fuel cell with exhaust gas recirculation provided by this utility model is as follows: Figures 1 to 4 As shown: The separation mechanism 42 includes a second support plate 426, which is fixedly installed on the side wall of the mixing chamber 1. A steam-water separator 423 is fixedly installed on the top of the second support plate 426. A support block 422 is fixedly installed on the top of the steam-water separator 423. A condenser 421 is fixedly installed on the top of the support block 422. An arc-shaped tube 424 is fixedly installed on the side wall of the condenser 421. The other end of the arc-shaped tube 424 is fixedly connected to the side wall of the steam-water separator 423. A discharge chamber 425 is fixedly installed on the side wall of the steam-water separator 423. The other end of the discharge chamber 425 is fixedly connected to the side wall of the transport pipe 418.

[0021] In this embodiment, the inner wall of the condenser 421 is connected to the interior of the arc-shaped tube 424, the inner wall of the arc-shaped tube 424 is connected to the interior of the steam-water separator 423, and the inner wall of the steam-water separator 423 is connected to the interior of the discharge hopper 425.

[0022] In the actual implementation process, when the operator uses the device, the condenser 421 exchanges heat with the exhaust through cooling water to condense the water vapor in the exhaust into liquid water. The steam-water separator 423 adopts a cyclone separation structure to further separate the residual mist water droplets, so as to avoid the liquid water from entering the subsequent pipeline and causing corrosion or blockage.

[0023] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to the embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A PEM fuel cell with exhaust gas recirculation, comprising a mixing chamber (1). The reinforcement component (2) is fixedly installed on the side wall of the mixing chamber (1); and a processing assembly (4) disposed on the side of the mixing chamber (1); characterized in that: The processing component (4) includes a circulation mechanism (41) located on the side of the mixing chamber (1). A separation mechanism (42) is provided on the side of the mixing chamber (1), and the separation mechanism (42) is connected to the circulation mechanism (41).

2. A PEM fuel cell with exhaust gas recirculation according to claim 1, characterized in that: The top of the mixing chamber (1) is fixedly installed with a discharge pipe (5), and a sealing plug (3) is slidably installed on the inner wall of the discharge pipe (5).

3. A PEM fuel cell with exhaust gas recirculation according to claim 1, characterized in that: The circulation mechanism (41) includes a support plate (414), which is fixedly installed on the side wall of the mixing chamber (1). A pre-humidifier (412) is fixedly installed on the top of the support plate (414), and a control valve pipe (413) is fixedly installed on the top of the pre-humidifier (412). The other end of the control valve pipe (413) is fixedly connected to the side wall of the mixing chamber (1). A socket block (411) is fixedly installed on the side wall of the pre-humidifier (412). The side wall of the socket block (411) is fixedly connected to the side wall of the mixing chamber (1). A circulation pump (415) is fixedly installed on the top of the support plate (414). A connector (416) is fixedly installed on one end of the circulation pump (415). A connecting pipe (417) is fixedly installed on the side wall of the connector (416). The other end of the connecting pipe (417) is fixedly connected to the side wall of the mixing chamber (1). A transport pipe (418) is fixedly installed on the side wall of the connector (416).

4. A PEM fuel cell with exhaust gas recirculation according to claim 3, characterized in that: The inner wall of the pre-humidifier (412) is connected to the inside of the control valve pipe (413), the inner wall of the connector (416) is connected to the inside of the connecting pipe (417), and the inner wall of the connector (416) is connected to the inside of the transport pipe (418).

5. A PEM fuel cell with exhaust gas recirculation according to claim 1, characterized in that: The separation mechanism (42) includes a second support plate (426), which is fixedly installed on the side wall of the mixing chamber (1). A steam-water separator (423) is fixedly installed on the top of the second support plate (426). A support block (422) is fixedly installed on the top of the steam-water separator (423). A condenser (421) is fixedly installed on the top of the support block (422). An arc-shaped tube (424) is fixedly installed on the side wall of the condenser (421). The other end of the arc-shaped tube (424) is fixedly connected to the side wall of the steam-water separator (423). A discharge chamber (425) is fixedly installed on the side wall of the steam-water separator (423). The other end of the discharge chamber (425) is fixedly connected to the side wall of the transport pipe (418).

6. A PEM fuel cell with exhaust gas recirculation according to claim 5, characterized in that: The inner wall of the condenser (421) is connected to the interior of the arc-shaped tube (424), the inner wall of the arc-shaped tube (424) is connected to the interior of the steam-water separator (423), and the inner wall of the steam-water separator (423) is connected to the interior of the discharge hopper (425).

7. A PEM fuel cell with exhaust gas recirculation according to claim 1, characterized in that: There are four reinforcement components (2), all of which are equal in shape and size, and are fixedly installed at equal intervals on the side wall of the mixing chamber (1).

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