A fuel cell stack hydrogen circulation device

Abstract

The utility model discloses a kind of fuel cell stack hydrogen circulation devices, it is related to fuel cell technical field, including drying cabinet, the upper end of drying cabinet is equipped with drying cavity, the inside of drying cavity is equipped with drying mechanism, the upper end of drying cabinet is connected with closed mechanism, device slot is equipped with on the lateral wall of drying cabinet, second air pipe, first air pipe are respectively equipped with on the left and right two sides inner wall of drying cavity, the one end of second air pipe away from drying cavity extends to the inside of device slot, the one end of first air pipe away from drying cavity extends to the outside of drying cabinet, gas circulation pump is installed on the outer wall of drying cabinet, the input end of gas circulation pump is connected with first air pipe.The utility model can realize the efficient separation of water vapor, while effectively guaranteeing the sufficient drying of hydrogen, simple and compact structure, can effectively recycle the discharged hydrogen for recycling.

Description

TECHNICAL FIELD

[0001] The utility model relates to fuel cell technical field especially relates to a fuel cell stack hydrogen circulation device. BACKGROUND

[0002] Fuel cell is a kind of chemical device that the chemical energy of fuel is directly converted into electric energy, also called electrochemical generator.It is the fourth generation of power generation technology after water power generation, thermal power generation and atomic power generation, and is a very promising power generation technology.

[0003] With the practical application of fuel cell, it is found that the gas discharged by high-power fuel cell stack contains a large amount of unreacted hydrogen, and the hydrogen contains water vapor and liquid water. When recovering the unreacted hydrogen, water vapor and liquid water will enter the stack with hydrogen, causing waterlogging phenomenon, affecting the efficiency of the stack. Therefore, there is a fuel cell stack hydrogen circulation device in the market, with publication number CN213636059U and name of a kind of fuel cell stack hydrogen circulation device. In this patent, only the zigzag plate is provided to adsorb and dry the water vapor in the hydrogen, and the pre-treatment of the gas-water mixture is lacking, so that the drying and adsorption pressure of the zigzag plate is large, the service life of the zigzag plate is reduced, and the replacement operation of the zigzag plate in this patent is not convenient. UTILITY MODEL CONTENT

[0004] The utility model aims at solving the shortcomings in the prior art and provides a fuel cell stack hydrogen circulation device.

[0005] In order to achieve the above-mentioned purpose, the utility model adopts the following technical scheme:

[0006] A fuel cell stack hydrogen circulation device, comprising a drying box, a drying cavity is arranged at the upper end of the drying box, a drying mechanism is arranged in the drying cavity, a sealing mechanism is connected to the upper end of the drying box, a device slot is arranged through the side wall of the drying box, a second air pipe and a first air pipe are arranged through the left and right side inner walls of the drying cavity respectively, the end of the second air pipe away from the drying cavity extends to the inside of the device slot, the end of the first air pipe away from the drying cavity extends to the outside of the drying box, a gas circulation pump is installed on the outer wall of the drying box, the input end of the gas circulation pump is connected with the first air pipe, the other end of the gas circulation pump is connected with a gas circulation pipe, a water storage cavity is arranged below the device slot in the drying box, a serpentine condenser pipe is arranged in the device slot, the upper end of the serpentine condenser pipe is connected with the second air pipe, the lower end of the serpentine condenser pipe is connected with a water guide pipe, the water guide pipe penetrates the inner bottom wall of the device slot and extends to the inside of the water storage cavity, a gas-water input pipe is arranged through the inner wall of the device slot, and the side wall of the serpentine condenser pipe connected with the gas-water input pipe.

[0007] As a further improvement of this utility model, the drying mechanism includes a shell disposed inside the drying chamber, a zigzag plate fixed inside the shell, a calcium chloride coating on the surface of the zigzag plate, and through holes evenly distributed on the zigzag plate.

[0008] As a further improvement of this utility model, the sealing mechanism includes a box cover, which is hinged to the drying box via a hinge, and two mounting bolts are provided through the box cover, which are screwed to the upper end of the drying box.

[0009] As a further improvement of this utility model, a sealing gasket that mates with the drying chamber is fixed at the lower end of the box cover.

[0010] As a further improvement of this utility model, a fan facing the serpentine condenser tube is installed inside the device slot.

[0011] As a further improvement of this utility model, a drain pipe fixed to the drying box is provided through the side wall of the drying box, the drain pipe is connected to the inside of the water storage cavity, and a drain valve is installed on the drain pipe.

[0012] The beneficial effects of this utility model are:

[0013] The serpentine condenser tube can efficiently condense water vapor in the gas-water mixture, achieving efficient separation of water vapor and effectively separating most of the water vapor, while also reducing the pressure during subsequent water vapor absorption and treatment.

[0014] The drying mechanism can further dry and absorb any remaining water vapor in the hydrogen, effectively ensuring that the hydrogen is fully dried.

[0015] Because the sealing mechanism can be opened and closed, the drying mechanism can be loaded and unloaded by opening the lid. This makes it easy to replace the drying mechanism when it needs to be replaced after use, making it convenient to use.

[0016] This invention enables efficient separation of water vapor while effectively ensuring the thorough drying of hydrogen. It features a simple and compact structure and can effectively recover emitted hydrogen for recycling. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the structure of a hydrogen circulation device for a fuel cell stack according to the present invention from one perspective.

[0018] Figure 2 This is a schematic diagram of the hydrogen circulation device for a fuel cell stack proposed in this utility model from another perspective.

[0019] Figure 3This is a cross-sectional structural schematic diagram of a hydrogen circulation device for a fuel cell stack proposed in this utility model.

[0020] Figure 4 This is a schematic diagram of the structure of the tank cover and sealing gasket of a hydrogen circulation device for a fuel cell stack according to the present invention;

[0021] Figure 5 This is a schematic diagram of the drying mechanism of a hydrogen circulation device for a fuel cell stack proposed in this utility model.

[0022] In the diagram: 1. Drying oven, 2. Cover, 3. Mounting bolts, 4. Hinge, 5. Gas-water input pipe, 6. Gas circulation pipe, 7. Gas circulation pump, 8. First vent pipe, 9. Device slot, 10. Serpentine condenser pipe, 11. Water guide pipe, 12. Fan, 13. Drain pipe, 14. Drain valve, 15. Water storage chamber, 16. Second vent pipe, 17. Drying chamber, 18. Shell, 19. Bending plate, 20. Sealing gasket. Detailed Implementation

[0023] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0024] Reference Figures 1-5 A hydrogen circulation device for a fuel cell stack includes a drying chamber 1, a drying cavity 17 at the upper end of the drying chamber 1, a drying mechanism inside the drying cavity 17, a sealing mechanism connected to the upper end of the drying chamber 1, a device groove 9 penetrating the side wall of the drying chamber 1, a second vent pipe 16 and a first vent pipe 8 penetrating the inner walls of the left and right sides of the drying cavity 17 respectively, one end of the second vent pipe 16 away from the drying cavity 17 extending into the interior of the device groove 9, and one end of the first vent pipe 8 away from the drying cavity 17 extending into the exterior of the drying chamber 1, a gas circulation pump 7 installed on the outer wall of the drying chamber 1, the input end of the gas circulation pump 7 connected to the first vent pipe 8, and the other end of the gas circulation pump 7 connected to the gas circulation pipe 6, and a device located below the device groove 9 inside the drying chamber 1. The square water storage chamber 15 has a drain pipe 13 fixed to the drying chamber 1 through the side wall of the drying chamber 1. The drain pipe 13 is connected to the inside of the water storage chamber 15. A drain valve 14 is installed on the drain pipe 13. The drain valve 14 is a solenoid valve. Opening the drain valve 14 can drain the water inside the water storage chamber 15. The device tank 9 has a serpentine condenser tube 10 inside. A fan 12 facing the serpentine condenser tube 10 is installed inside the device tank 9. The upper end of the serpentine condenser tube 10 is connected to the second vent pipe 16. The lower end of the serpentine condenser tube 10 is connected to a water guide pipe 11. The water guide pipe 11 passes through the inner bottom wall of the device tank 9 and extends into the inside of the water storage chamber 15. A gas-water input pipe 5 passes through the inner wall of the device tank 9. The gas-water input pipe 5 is connected to the side wall of the serpentine condenser tube 10.

[0025] In this utility model, the drying mechanism includes a housing 18 disposed inside the drying chamber 17. A zigzag plate 19 is fixed inside the housing 18. The surface of the zigzag plate 19 is coated with calcium chloride, which can absorb water vapor. The zigzag plate 19 has through holes evenly distributed on it, which allow gas to pass through.

[0026] The sealing mechanism includes a lid 2, which is hinged to the drying chamber 1 via a hinge 4. Two mounting bolts 3 are threaded through the lid 2 and screwed onto the upper end of the drying chamber 1. A sealing gasket 20 that mates with the drying chamber 17 is fixed to the lower end of the lid 2. The sealing gasket 20 can fully seal the drying chamber 17 and prevent gas leakage.

[0027] When this utility model is in use, the fan 12 is started to cool the serpentine condenser 10. The gas-water mixture containing hydrogen enters the serpentine condenser 10 through the gas-water input pipe 5. The water vapor in the gas-water mixture can be condensed into liquid water through the serpentine condenser 10. Then the liquid water enters the water storage chamber 15 through the water guide pipe 11 for storage. Then the hydrogen enters the drying chamber 17 through the second vent pipe 16. There may still be residual water vapor in the hydrogen. It is further dried and absorbed by the zigzag plate 19. Then the dried hydrogen is exported through the first vent pipe 8 and output through the gas circulation pump 7 for recycling.

[0028] The above are merely preferred embodiments of this utility model, but the scope of protection of this utility model is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in this utility model, based on the technical solution and inventive concept of this utility model, should be included within the scope of protection of this utility model.

Claims

1. A hydrogen circulation device for a fuel cell stack, comprising a drying chamber (1), characterized in that, The upper end of the drying chamber (1) is provided with a drying chamber (17), and the drying chamber (17) is provided with a drying mechanism. The upper end of the drying chamber (1) is connected to a sealing mechanism. A device groove (9) is provided through the side wall of the drying chamber (1). A second vent pipe (16) and a first vent pipe (8) are respectively provided through the inner walls of the left and right sides of the drying chamber (17). The end of the second vent pipe (16) away from the drying chamber (17) extends into the interior of the device groove (9), and the end of the first vent pipe (8) away from the drying chamber (17) extends into the exterior of the drying chamber (1). A gas circulation pump (7) is installed on the outer wall of the drying chamber (1). The input end of the gas circulation pump (7) is... Connected to the first vent pipe (8), the other end of the gas circulation pump (7) is connected to the gas circulation pipe (6). The drying oven (1) has a water storage chamber (15) located below the device trough (9). The device trough (9) has a serpentine condenser (10) inside. The upper end of the serpentine condenser (10) is connected to the second vent pipe (16). The lower end of the serpentine condenser (10) is connected to a water guide pipe (11). The water guide pipe (11) penetrates the inner bottom wall of the device trough (9) and extends into the water storage chamber (15). A gas-water input pipe (5) is installed through the inner wall of the device trough (9). The gas-water input pipe (5) is connected to the side wall of the serpentine condenser (10).

2. The hydrogen recirculation device for a fuel cell stack according to claim 1, characterized in that, The drying mechanism includes a housing (18) disposed inside the drying chamber (17), a zigzag plate (19) fixed inside the housing (18), the surface of the zigzag plate (19) is coated with calcium chloride, and through holes are evenly distributed on the zigzag plate (19).

3. The hydrogen recirculation device for a fuel cell stack according to claim 1, characterized in that, The sealing mechanism includes a lid (2), which is hinged to the drying box (1) via a hinge (4). Two mounting bolts (3) are provided through the lid (2), and the mounting bolts (3) are screwed to the upper end of the drying box (1).

4. A hydrogen recirculation device for a fuel cell stack according to claim 3, characterized in that, The lower end of the box cover (2) is fixed with a sealing gasket (20) that mates with the drying chamber (17).

5. A hydrogen recirculation device for a fuel cell stack according to claim 1, characterized in that, A fan (12) facing the serpentine condenser tube (10) is installed inside the device slot (9).

6. A hydrogen recirculation device for a fuel cell stack according to claim 1, characterized in that, A drain pipe (13) fixed to the drying box (1) is provided through the side wall of the drying box (1). The drain pipe (13) is connected to the inside of the water storage chamber (15). A drain valve (14) is installed on the drain pipe (13).

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