A hydrogen gas purification and recycling device for flow battery

Abstract

The utility model discloses a kind of liquid flow battery hydrogen gas clean filter recovery devices, including hydrogen filter and containing box, the hydrogen filter includes lower shell and upper shell, filter core is embedded between the inner wall of lower shell and upper shell, the inner wall of lower shell is equipped with side liquid outlet and bottom liquid outlet, the inner wall of upper shell is fixedly connected with compression plate, the inner wall of compression plate is equipped with backflow, the top outer wall of upper shell is equipped with exhaust pipe.Hydrogen filter, hydrogen in liquid storage tank is filtered, electrolyte gasification in hydrogen is filtered out and is discharged back to liquid storage tank, among them, mainly there is lower shell, upper shell, side liquid outlet in hydrogen filter, mainly electrolyte in hydrogen filter is discharged back to liquid storage tank, bottom liquid outlet, when filter core is compressed, among electrolyte gasification is absorbed to become liquid and can be discharged to liquid storage tank by bottom liquid outlet.

Description

Technical Field

[0001] This utility model belongs to the field of new energy battery technology, specifically relating to a hydrogen purification and recovery device for a flow battery. Background Technology

[0002] During the cyclic charging and discharging of a flow battery stack, the entire system is in a closed state. Driven by a pump, the electrolyte continuously circulates in and out of the system, forming a closed liquid flow loop. However, during charging, hydrogen gas is generated and discharged into the electrolyte storage tank through the liquid flow pipeline. If a large amount of hydrogen gas is stored in the tank and not discharged in time, the tank pressure will increase, potentially leading to the tank rupturing due to excessive pressure. To address this issue...

[0003] The most common practice is to directly vent hydrogen into the atmosphere through external pipelines in the storage tank. However, this leads to a problem: the venting of hydrogen will carry away some of the vaporized electrolyte from the entire flow battery system. This results in a continuous reduction of electrolyte during charge-discharge cycles, affecting the chemical reaction balance of the stack, reducing energy efficiency, causing additional losses, and at the same time, hydrogen cannot be effectively recycled. Utility Model Content

[0004] To address the shortcomings of existing technologies, the purpose of this invention is to provide a hydrogen purification and recovery device for flow batteries, which has the advantage of easy filtration and recovery.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a hydrogen purification and recovery device for a flow battery, comprising a hydrogen filter and a housing, wherein the hydrogen filter comprises a lower housing and an upper housing, a filter element is embedded between the inner walls of the lower housing and the upper housing, a side drain port and a bottom drain port are provided on the inner wall of the lower housing, a compression plate is fixedly connected to the inner wall of the upper housing, a return port is provided on the inner wall of the compression plate, and an exhaust pipe is provided on the top outer wall of the upper housing.

[0006] The hydrogen filter described above purifies the hydrogen in the storage tank, removing the vaporized electrolyte and returning it to the storage tank. The hydrogen filter mainly consists of a lower shell, an upper shell, a side drain port (for returning the electrolyte to the storage tank), a bottom drain port (for discharging the vaporized electrolyte back into the storage tank after compression), a first protrusion (which works with a second protrusion to maintain the working height and position of the hydrogen filter), an exhaust pipe (providing a discharge path for the hydrogen), a compression plate (compressing the filter element by raising and lowering the device to discharge the electrolyte), and a return port (allowing excess electrolyte to overflow from the top shell after compression back into the filter element and then back into the storage tank).

[0007] Preferably, the bottom drain port is located at the center of the lower housing, and the side drain port is located outside the bottom drain port.

[0008] The above technical solution can achieve the effect of diverting the flow. The bottom drain and the side drain are located in different positions, thus forming two flow channels.

[0009] Preferably, the side of the compression plate closest to the exhaust pipe is tapered, and the return port is located at the center of the compression plate.

[0010] The above technical solution can facilitate liquid flow. One side of the compression plate is conical, which facilitates liquid flow and avoids liquid residue.

[0011] Preferably, the outer wall of the lower housing is fixedly connected to a first boss, and the outer wall of the upper housing is fixedly connected to a second boss, with the inner walls of the first boss and the second boss fitting together.

[0012] The above technical solution optimizes the fixing effect by hot-melt welding the lower shell of the hydrogen filter to the top of the liquid storage tank. During normal operation of the flow battery system, the lower shell boss and the upper shell pressure drop platform are aligned, ensuring that the filter element is in a relaxed state and filters out the vaporized electrolyte in the hydrogen to a greater extent. When the flow battery system stops operating, the upper shell pressure drop platform is rotated so that the lower shell boss and the second boss are embedded, compressing the filter element and allowing the filtered electrolyte to drain back into the electrolyte storage tank through the filter element drain port, completing one operating cycle of the device.

[0013] Preferably, an electric stack is fixedly connected to the inner wall of the container, a liquid storage tank is fixedly connected to the inner wall of the container, the liquid storage tank is connected to the bottom drain port of the hydrogen filter, a recovery pipe is connected to the outer wall of the exhaust pipe at the top of the hydrogen filter, and a storage tank is connected to the outer wall of the recovery pipe.

[0014] The above technical solution can achieve the effect of collection. After the hydrogen is separated from the liquid, the separated hydrogen can be collected through the storage tank.

[0015] Compared with the prior art, the beneficial effects of this utility model are: 1. Hydrogen filter: This filter removes the vaporized electrolyte from the hydrogen in the storage tank and returns it to the storage tank. The hydrogen filter mainly consists of a lower shell, an upper shell, a side drain port (for returning the electrolyte to the storage tank), a bottom drain port (to allow the vaporized electrolyte to be absorbed and discharged into the storage tank after the filter element is compressed), a first boss (which works with the second boss to maintain the working height and position of the hydrogen filter), an exhaust pipe (to provide a path for the hydrogen to exit), a compression plate (to compress the filter element and discharge the electrolyte by raising and lowering the device), and a return port (to allow excess electrolyte to overflow from the filter element into the upper shell after compression, flowing back into the filter element and then back into the storage tank).

[0016] 2. The bottom drain and side drain positions are different, thus forming two flow channels. One side of the compression plate is conical, which facilitates liquid convergence and avoids liquid residue. The lower shell of the hydrogen filter is heat-fused and welded to the top of the storage tank. When the flow battery system is running normally, the lower shell boss and the upper shell pressure drop platform are aligned, which ensures that the filter element is in a relaxed state, filtering out the vaporized electrolyte in the hydrogen to a greater extent. When the flow battery system stops running, the position of the upper shell pressure drop platform is rotated so that the lower shell boss and the second boss are embedded, compressing the filter element and allowing the filtered electrolyte to be discharged back into the electrolyte storage tank through the filter element drain port, completing one operating cycle of the device. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the main structure of this utility model; Figure 2 This is a schematic diagram of the hydrogen filter structure of this utility model; Figure 3 This is a cross-sectional view of the hydrogen filter of this utility model.

[0018] In the diagram: 1. Container tank; 2. Fuel cell stack; 3. Liquid storage tank; 4. Hydrogen filter; 5. Recovery pipe; 6. Storage tank; 7. Lower shell; 8. Upper shell; 9. Side drain port; 10. Bottom drain port; 11. First boss; 12. Exhaust pipe; 13. Second boss; 14. Compression plate; 15. Return port; 16. Filter element. Detailed Implementation

[0019] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0020] Example 1: Please see Figures 1-3 This utility model provides a technical solution: a hydrogen purification and recovery device for a flow battery, including a hydrogen filter 4 and a housing 1. The hydrogen filter 4 includes a lower housing 7 and an upper housing 8. A filter element 16 is embedded between the inner walls of the lower housing 7 and the upper housing 8. The inner wall of the lower housing 7 has a side drain port 9 and a bottom drain port 10. A compression plate 14 is fixedly connected to the inner wall of the upper housing 8. A return port 15 is opened on the inner wall of the compression plate 14. An exhaust pipe 12 is opened on the top outer wall of the upper housing 8.

[0021] In this embodiment, the hydrogen filter 4 filters the hydrogen in the storage tank 3, removing the vaporized electrolyte from the hydrogen and returning it to the storage tank 3. The hydrogen filter 4 mainly consists of a lower shell 7, an upper shell 8, a side drain port 9 (mainly for returning the electrolyte in the hydrogen filter 4 to the storage tank 3), a bottom drain port 10 (when the filter element 16 is compressed, the vaporized electrolyte is absorbed and becomes liquid, which can be discharged into the storage tank 3 through the bottom drain port 10), a first protrusion 11 (mainly cooperates with the second protrusion 13 to maintain the working height and position of the hydrogen filter 4), an exhaust pipe 12 (used to provide an exhaust path for hydrogen), a compression plate 14 (compresses the filter element 16 by raising and lowering the height of the device, discharging the electrolyte inside), and a return port 15 (when too much electrolyte in the filter element 16 overflows to the top upper shell 8 after compression, it can flow back into the filter element 16 through the return port 15 and then be discharged back into the storage tank 3).

[0022] Example 2: Please see Figures 1-3 Based on Embodiment 1, this utility model provides a technical solution: the bottom drain port 10 is located at the center of the lower housing 7, the side drain port 9 is located outside the bottom drain port 10, the compression plate 14 is conical on the side near the exhaust pipe 12, the return port 15 is opened at the center of the compression plate 14, the outer wall of the lower housing 7 is fixedly connected to the first boss 11, the outer wall of the upper housing 8 is fixedly connected to the second boss 13, and the inner walls of the first boss 11 and the second boss 13 are in contact with each other.

[0023] In this embodiment, the bottom drain port 10 and the side drain port 9 are located at different positions, thus forming two flow channels. One side of the compression plate 14 is conical, which facilitates liquid convergence and avoids liquid residue. The lower housing 7 of the hydrogen filter 4 is heat-fused and welded to the top of the liquid storage tank 3. When the flow battery system is running normally, the protrusion of the lower housing 7 and the pressure drop platform of the upper housing 8 are aligned. This ensures that the filter element 16 is in an expanded state, thus filtering out the vaporized electrolyte in the hydrogen to a greater extent. When the flow battery system stops running, the pressure drop platform of the upper housing 8 is rotated so that the protrusion of the lower housing 7 and the second protrusion 13 are embedded, compressing the filter element 16 and allowing the filtered electrolyte to be discharged back into the electrolyte storage tank 3 through the drain port of the filter element 16, completing one working cycle of the device.

[0024] Example 3: Please see Figures 1-3 Based on Embodiment 1 and Embodiment 2, this utility model provides a technical solution: an electric stack 2 is fixedly connected to the inner wall of the container 1, a liquid storage tank 3 is fixedly connected to the inner wall of the container 1, the liquid storage tank 3 is connected to the bottom drain port 10 at the bottom of the hydrogen filter 4, a recovery pipe 5 is connected to the outer wall of the exhaust pipe 12 at the top of the hydrogen filter 4, and a storage tank 6 is connected to the outer wall of the recovery pipe 5.

[0025] In this embodiment, after the hydrogen gas is separated from the liquid, the separated hydrogen gas can be collected through the storage tank 6.

[0026] The working principle and usage process of this utility model are as follows: The hydrogen filter 4 filters the hydrogen in the storage tank 3, removing the vaporized electrolyte and returning it to the storage tank 3. The hydrogen filter 4 mainly consists of a lower shell 7, an upper shell 8, a side drain port 9 (mainly for returning the electrolyte from the hydrogen filter 4 to the storage tank 3), a bottom drain port 10 (when the filter element 16 is compressed, the vaporized electrolyte is absorbed and becomes liquid, which can be discharged into the storage tank 3 through the bottom drain port 10), a first protrusion 11 (mainly cooperates with the second protrusion 13 to maintain the working height and position of the hydrogen filter 4), an exhaust pipe 12 (used to provide an exhaust path for the hydrogen), a compression plate 14 (compresses the filter element 16 by raising and lowering the device, discharging the electrolyte inside), and a return port 15 (when excessive electrolyte overflows from the filter element 16 to the top upper shell 8 after compression, it can flow through the return port 15 to the storage tank 3). In filter element 16, the liquid is discharged back into the storage tank 3. The bottom drain port 10 and the side drain port 9 are in different positions, thus forming two flow channels. One side of the compression plate 14 is conical, which facilitates liquid convergence and avoids liquid residue. The lower housing 7 of the hydrogen filter 4 is heat-fused and welded to the top of the storage tank 3. When the flow battery system is running normally, the protrusion of the lower housing 7 and the pressure drop platform of the upper housing 8 are aligned. This ensures that filter element 16 is in an expanded state, filtering out the vaporized electrolyte in the hydrogen to a greater extent. When the flow battery system stops running, the pressure drop platform of the upper housing 8 is rotated so that the protrusion of the lower housing 7 and the second protrusion 13 are embedded, compressing filter element 16 and allowing the filtered electrolyte to be discharged back into the electrolyte storage tank 3 through the drain port of filter element 16, completing one working cycle of the device. After the hydrogen and liquid are separated, the separated hydrogen can be collected through the storage tank 6.

[0027] 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 these 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 hydrogen purification and recovery device for a flow battery, comprising a hydrogen filter (4) and a container (1), characterized in that: The hydrogen filter (4) includes a lower housing (7) and an upper housing (8). A filter element (16) is embedded between the inner walls of the lower housing (7) and the upper housing (8). The inner wall of the lower housing (7) is provided with a side drain port (9) and a bottom drain port (10). The inner wall of the upper housing (8) is fixedly connected with a compression plate (14). The inner wall of the compression plate (14) is provided with a return port (15). The top outer wall of the upper housing (8) is provided with an exhaust pipe (12).

2. The hydrogen purification and recovery device for a flow battery according to claim 1, characterized in that: The bottom drain port (10) is located at the center of the lower housing (7), and the side drain port (9) is located outside the bottom drain port (10).

3. The hydrogen purification and recovery device for a flow battery according to claim 1, characterized in that: The side of the compression plate (14) near the exhaust pipe (12) is tapered, and the return port (15) is located at the center of the compression plate (14).

4. The hydrogen purification and recovery device for a flow battery according to claim 1, characterized in that: The outer wall of the lower housing (7) is fixedly connected to a first boss (11), and the outer wall of the upper housing (8) is fixedly connected to a second boss (13). The inner walls of the first boss (11) and the second boss (13) fit together.

5. The hydrogen purification and recovery device for a flow battery according to claim 1, characterized in that: The inner wall of the container (1) is fixedly connected to the fuel cell stack (2), and the inner wall of the container (1) is fixedly connected to the liquid storage tank 3 (3). The liquid storage tank 3 (3) is connected to the bottom drain port (10) at the bottom of the hydrogen filter (4). The outer wall of the exhaust pipe (12) at the top of the hydrogen filter (4) is connected to the recovery pipe (5), and the outer wall of the recovery pipe (5) is connected to the storage tank (6).

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