Steam-water separator structure of fuel cell

Abstract

The invention discloses a steam-water separator structure of a fuel cell. The steam-water separator structure comprises a hydrogen inlet, a separator body, a cover plate and a hydrogen outlet, a hydrogen inlet is formed in the upper end of the left side of the separator body; a cover plate is arranged at the upper end of the separator body; a hydrogen outlet is formed close to the right end of the cover plate; a drain valve mounting opening is formed in the bottom of the separator body; a staggered baffle structure is arranged at the end, close to the hydrogen inlet, in the separator body. The baffle structures are arranged in the separator body close to the hydrogen inlet end in a staggered manner, so that the flow resistance is low, and the baffle structures have small influence on the flow velocity of fluid; the vapor-liquid mixture is separated through the first baffle and the second baffle, the flow speed is reduced, the vapor-liquid mixture passes through the horn mouth again, and the separation effect is better.

Description

Technical Field

[0001] The invention belongs to the field of fuel cell equipment, and in particular, relates to a fuel cell steam-water separator structure. Background Art

[0002] At present, the hydrogen gas in fuel cells passes through the steam-water separator with baffles or cyclone structures, and the separation effect is not very obvious. Most of the water in the hydrogen path is brought back to the air inlet, which can easily lead to flooding of the fuel cell stack and low power consumption of the fuel cell stack. The existing steam-water separator has a certain separation effect in a certain power range, and the separation effect will be poor when the power is greater or less than this power. Summary of the invention

[0003] Aiming at the problem that the existing fuel cell steam-water separator has poor separation effect in the steam-water separation process, the present invention provides a fuel cell steam-water separator structure.

[0004] In order to achieve the above technical objectives, the technical solution adopted by the present invention is as follows:

[0005] A fuel cell steam-water separator structure comprises a hydrogen inlet, a separator body, a cover plate and a hydrogen outlet;

[0006] A hydrogen inlet is provided at the upper left end of the separator body;

[0007] A cover plate is provided at the upper end of the separator body, and a hydrogen outlet is provided near the right end of the cover plate;

[0008] A drain valve installation port is provided at the bottom of the separator body;

[0009] A staggered baffle structure is arranged in the separator body near the hydrogen inlet end.

[0010] Furthermore, the baffle structure includes a first baffle and a second baffle, the upper end of the first baffle is fixedly connected to the cover plate, and a gas-liquid mixture flow channel is reserved between the lower end of the first baffle and the inner side of the bottom of the separator body; the bottom of the second baffle is fixedly connected to the inner side of the bottom of the separator body, and a gas-liquid mixture flow channel is reserved between the upper end of the second baffle and the cover plate. Both the first baffle and the second baffle play the role of slowing down the gas-liquid mixture.

[0011] Furthermore, a water flow hole is reserved at the connection between the second baffle and the bottom of the separator body. The water flows into a water storage box on the right side of the separator body through the water flow hole, and a drain port is provided at the bottom of the water storage box.

[0012] Furthermore, a reinforcing rib is provided at the connection between the first baffle and the cover plate, and the reinforcing rib is arranged near the hydrogen inlet. The reinforcing rib is arranged to increase the pressure impact strength of the first baffle against the high-speed inflow of the gas-liquid mixture; and to enhance the impact resistance of the first baffle.

[0013] Furthermore, a bell mouth is provided on the inner side of the cover plate to collect hydrogen, and the upper end of the bell mouth is fixedly connected to the hydrogen outlet. The hydrogen that has been decelerated twice passes through the bell mouth, and the gas and liquid are separated under the action of centrifugal force. The size and length of the bell mouth are designed according to the flow rate and flow size of the gas.

[0014] Furthermore, a water baffle is provided in the middle of the right side of the second baffle, the water baffle is arranged below the bell mouth, and the right side and the bottom of the water baffle are fixedly connected to the inner side wall of the separator body.

[0015] Further, four columns are arranged on the bottom of the right side of the separator body, and the water baffle is fixed on the upper end of the column. Four threaded connection holes are reserved on the water baffle, and then fixed on the column by screws.

[0016] Furthermore, the portion between the bottom of the left side of the separator body and the second baffle is an inclined italic structure. A drain port is set at the bottom of the right side of the separator body (i.e., the water storage box). After hydrogen passes through the first baffle and the second baffle, gas and liquid are separated and the water is discharged from the drain port through the italic structure.

[0017] Furthermore, a nitrogen exhaust valve installation port is provided on the front of the separator body, and the nitrogen exhaust valve installation port is arranged near the gas-liquid mixture flow channel reserved between the lower end of the first baffle and the inner side of the bottom of the separator body, so as to facilitate the discharge monitoring of nitrogen in the gas-liquid mixture.

[0018] Compared with the prior art, the present invention has the following beneficial effects:

[0019] Low flow resistance is achieved by staggered baffle structures arranged near the hydrogen inlet end in the separator body, and the baffle structure has little effect on the fluid flow rate;

[0020] After the gas-liquid mixture is separated by the first baffle and the second baffle and the flow rate is reduced, it passes through the bell mouth again, and the separation effect is better. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 This is a schematic diagram of the overall structure of a fuel cell gas-water separator structure in an embodiment of the present invention;

[0022] Figure 2 It is a front cross-sectional view of a fuel cell gas-water separator structure in an embodiment of the present invention;

[0023] Figure 3 The figure is a schematic diagram of the internal structure of a fuel cell gas-water separator structure in an embodiment of the present invention.

[0024] Markings in the figure: 1-hydrogen inlet, 2-separator body, 3-cover plate, 4-hydrogen outlet, 5-drain valve installation port, 6-first baffle, 7-second baffle, 8-water flow hole, 9-reinforcement rib, 10-bell mouth, 11-water baffle, 12-italic structure, 13-nitrogen exhaust valve installation port. DETAILED DESCRIPTION

[0025] In order to facilitate the understanding of those skilled in the art, the present invention is further described below in conjunction with embodiments and drawings. The contents mentioned in the implementation modes are not intended to limit the present invention.

[0026] like Figure 1 , Figure 2 and Figure 3 As shown, this embodiment provides a fuel cell gas-water separator structure, including a hydrogen inlet 1, a separator body 2, a cover plate 3 and a hydrogen outlet 4;

[0027] A hydrogen inlet 1 is provided at the upper left end of the separator body 2;

[0028] A cover plate 3 is provided at the upper end of the separator body 2, and a hydrogen outlet 4 is provided near the right end of the cover plate 3;

[0029] A drain valve installation port 5 is provided at the bottom of the separator body 2;

[0030] A staggered baffle structure is provided in the separator body 2 near the hydrogen inlet 1 .

[0031] The baffle structure includes a first baffle 6 and a second baffle 7. The upper end of the first baffle 6 is fixedly connected to the cover plate 3, and a gas-liquid mixture flow channel is reserved between the lower end of the first baffle 6 and the inner side of the bottom of the separator body 2; the bottom of the second baffle 7 is fixedly connected to the inner side of the bottom of the separator body 2, and a gas-liquid mixture flow channel is reserved between the upper end of the bottom of the second baffle 7 and the cover plate 3. The first baffle 6 and the second baffle 7 both play the role of slowing down the gas-liquid mixture.

[0032] A reinforcing rib 9 is provided at the connection between the first baffle plate 6 and the cover plate 3, and the reinforcing rib 9 is arranged near the hydrogen inlet 1. The reinforcing rib 9 is provided to increase the pressure impact strength of the first baffle plate 6 against the high-speed inflow of the gas-liquid mixture; and to enhance the impact resistance of the first baffle plate 6.

[0033] The length of the first baffle 6 and the distance from the hydrogen outlet are designed according to the flow rate and flow velocity of the system hydrogen, and have the functions of reducing the hydrogen flow velocity and separating liquid water. The hydrogen can flow out smoothly from the lower position, and the separated water can be collected.

[0034] The water separated on the first baffle 6 flows to the water storage box through the water flow hole 8 reserved at the connection between the second baffle 7 and the bottom of the separator body 2. The hydrogen gas decelerated by the first baffle 6 rises through the second baffle 7, and the saturated liquid condenses. When the hydrogen gas collides with the second baffle 7, liquid water condenses to achieve the separation effect. The water baffle 11 prevents the liquid water inside the water storage tank from being sucked back into the bell mouth 10 for the second time and prevents the liquid water from vibrating.

[0035] A bell mouth 10 is provided inside the cover plate 3 to collect hydrogen, and the upper end of the bell mouth 10 is fixedly connected to the hydrogen outlet 4. The hydrogen that has been decelerated twice passes through the bell mouth 10, and the gas and liquid are separated under the action of centrifugal force. The size and length of the bell mouth 10 are designed according to the flow rate and flow size of the gas.

[0036] A water baffle 11 is provided in the middle of the right side of the second baffle 7 . The water baffle 11 is arranged below the bell mouth 10 . The right side and the bottom of the water baffle 11 are fixedly connected to the inner wall of the separator body 2 .

[0037] The right bottom of the separator body 2 is provided with four columns, and a water baffle 11 is fixed on the upper end of the column. Four threaded connection holes are reserved on the water baffle 11, and then fixedly installed on the column by screws.

[0038] The part between the bottom of the left side of the separator body 2 and the second baffle 7 is an inclined italic structure 12, and a drain port is provided at the bottom of the right side of the separator body 2. After the hydrogen passes through the first baffle 6 and the second baffle 7, the gas and liquid are separated, and the water is discharged from the drain port through the italic structure 12.

[0039] The front of the separator body 2 is provided with a nitrogen exhaust valve installation port 13, which is arranged close to the gas-liquid mixture flow channel reserved between the lower end of the first baffle 6 and the inner side of the bottom of the separator body 2, so as to facilitate the discharge of nitrogen in the gas-liquid mixture.

[0040] Compared with the prior art, the present invention has the following beneficial effects:

[0041] Low flow resistance is achieved by staggered baffle structures arranged near the hydrogen inlet 1 in the separator body 2, and the baffle structure has little effect on the fluid flow rate;

[0042] After the vapor-liquid mixture is separated by the first baffle 6 and the second baffle 7 and the flow rate is reduced, it passes through the bell mouth 10 again, and the separation effect is better.

[0043] The above is a detailed introduction to a fuel cell gas-water separator structure provided by the present application. The description of the specific embodiment is only used to help understand the method and its core idea of ​​the present application. It should be pointed out that for ordinary technicians in this technical field, without departing from the principles of the present application, several improvements and modifications can be made to the present application, and these improvements and modifications also fall within the scope of protection of the claims of the present application.

Claims

1. A fuel cell steam-water separator structure, comprising a hydrogen inlet (1), a separator body (2), a cover plate (3) and a hydrogen outlet (4), characterized in that: A hydrogen inlet (1) is provided at the upper left end of the separator body (2); A cover plate (3) is provided at the upper end of the separator body (2), and a hydrogen outlet (4) is provided near the right end of the cover plate (3); A drainage valve installation opening (5) is provided at the bottom of the separator body (2); A staggered baffle structure is provided in the separator body (2) near the hydrogen inlet (1).

2. A fuel cell gas-water separator structure according to claim 1, characterized in that: The baffle structure comprises a first baffle (6) and a second baffle (7); the upper end of the first baffle (6) is fixedly connected to the cover plate (3), and a gas-liquid mixture circulation channel is reserved between the lower end of the first baffle (6) and the inner side of the bottom of the separator body (2); the bottom of the second baffle (7) is fixedly connected to the inner side of the bottom of the separator body (2), and a gas-liquid mixture circulation channel is reserved between the upper end of the bottom of the second baffle (7) and the cover plate (3).

3. A fuel cell gas-water separator structure according to claim 2, characterized in that: A water flow hole (8) is reserved at the connection between the second baffle (7) and the bottom of the separator body (2).

4. A fuel cell gas-water separator structure according to claim 3, characterized in that: A reinforcing rib (9) is provided at the connection between the first baffle plate (6) and the cover plate (3), and the reinforcing rib (9) is arranged close to one side of the hydrogen inlet (1).

5. A fuel cell gas-water separator structure according to claim 4, characterized in that: A bell mouth (10) is provided on the inner side of the cover plate (3) for collecting hydrogen, and the upper end of the bell mouth (10) is fixedly connected to the hydrogen outlet (4).

6. A fuel cell gas-water separator structure according to claim 5, characterized in that: A water baffle (11) is provided in the middle of the right side of the second baffle (7). The water baffle (11) is arranged below the bell mouth (10). The right side and bottom of the water baffle (11) are fixedly connected to the inner wall of the separator body (2).

7. A fuel cell gas-water separator structure according to claim 6, characterized in that: Four columns are arranged on the bottom of the right side of the separator body (2), and a water retaining plate (11) is fixed on the upper end of the column.

8. A fuel cell gas-water separator structure according to claim 7, characterized in that: The portion between the bottom of the left side of the separator body (2) and the second baffle (7) is an inclined italic structure (12).

9. A fuel cell gas-water separator structure according to claim 8, characterized in that: A nitrogen exhaust valve installation opening (13) is provided on the front of the separator body (2), and the nitrogen exhaust valve installation opening (13) is arranged close to a gas-liquid mixture flow channel reserved between the lower end of the first baffle (6) and the inner side of the bottom of the separator body (2).

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