Gas-water separation device of hydrogen fuel cell

Abstract

The utility model provides a gas-water separation device of a hydrogen fuel cell, which relates to the technical field of fuel cells and comprises a tank body, the separation assembly comprises an input pipe fixedly connected to the interior of the tank body, one end of the input pipe is fixedly connected with a flow dividing pipe, the bottom end of the flow dividing pipe is fixedly connected with a gas-liquid separation pipe, the top end of the outer side of the gas-liquid separation pipe is provided with a vent hole, and the bottom end of the gas-liquid separation pipe is fixedly connected with a bottom supporting disc; the interior of the separation assembly is fixedly connected with a water absorption assembly; by means of the design, efficient gas-water separation and automatic discharge of water are achieved, the purity and the circulation efficiency of hydrogen are improved, meanwhile, the situation that the active area of an electrode is reduced due to liquid water retention is avoided, and the problems that a traditional gas-liquid separation device carries liquid drops and the purity of hydrogen is reduced under the conditions of high humidity and high flow speed are effectively solved.

Description

Technical Field

[0001] This utility model relates to the field of fuel cell technology, and in particular to a hydrogen fuel cell gas-water separation device. Background Technology

[0002] In the fields of hydrogen energy utilization and chemical production, gas-liquid separation technology is a key link to achieve gas purification and efficient recovery of liquid by-products. Traditional gas-liquid separation devices usually use gravity sedimentation, centrifugal separation or filtration structure to achieve gas-liquid two-phase separation.

[0003] However, in practical applications, if the water generated by the electrochemical reaction is not quickly removed, the retention of liquid water will hinder the gas mass transfer inside the porous electrode, which will lead to a reduction in the electrode active area and an increase in ohmic impedance. Ultimately, this will manifest as fluctuations in the battery output voltage and a decrease in overall energy efficiency. In addition, if the directional recovery and redistribution of hydrogen gas retained at the anode cannot be achieved, the direct emission of unreacted gas will not only reduce the hydrogen energy utilization rate, but also exacerbate the system mass transfer and thermodynamic losses, thus restricting the long-term operational stability of the fuel cell stack.

[0004] Therefore, this utility model provides a hydrogen fuel cell gas-water separation device. Utility Model Content

[0005] The purpose of this invention is to overcome the shortcomings of the existing technology and provide a hydrogen fuel cell gas-water separation device.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: a hydrogen fuel cell gas-water separation device, including a tank;

[0007] The separation assembly includes an input pipe fixedly connected to the inside of the tank, a diversion pipe fixedly connected to one end of the input pipe, a gas-liquid separation pipe fixedly connected to the bottom end of the diversion pipe, a vent hole opened at the top outer side of the gas-liquid separation pipe, a bottom support plate fixedly connected to the bottom end of the gas-liquid separation pipe, and a water absorption assembly fixedly connected inside the separation assembly.

[0008] In a preferred embodiment, the water absorption assembly includes a return pipe fixedly connected to the input pipe, a limiting ring fixedly connected inside the return pipe, a retaining ball rotatably connected inside the limiting ring, a rotating column threadedly connected inside the retaining ball, and a linkage rod fixedly connected to the top of the rotating column.

[0009] In a preferred embodiment, a floating ring is fixedly connected to the end of the linkage rod away from the rotating column. The outer side of the floating ring is slidably connected to the inner wall of the tank, and the inner side of the floating ring is slidably connected to the outer side of the return pipe.

[0010] In a preferred embodiment, mounting brackets are fixedly connected to the four corners of the inner wall of the tank. The inside of the mounting brackets is fixedly connected to the outside of the return pipe, and the outside of the linkage rod is slidably connected to the inside of the mounting brackets.

[0011] In a preferred embodiment, the outer side of the rotating column passes through the outer side of the limiting ring and extends into the interior of the return pipe, the bottom end of the tank is fixedly connected to a water outlet pipe, and the top end of the tank is fixedly connected to an air outlet pipe.

[0012] In a preferred embodiment, a return water pipe is fixedly connected to one end of each of the four return pipes, and the outer side of the return water pipe is fixedly connected to the inside of the bottom support plate and extends towards the bottom.

[0013] Compared with the prior art, the advantages and positive effects of this utility model are as follows:

[0014] 1. A mixture of hydrogen and water is introduced into the tank through the input pipe, which then drives the diversion pipe to distribute the mixture evenly into the gas-liquid separation pipe, thus initiating the gas-liquid separation process. Inside the gas-liquid separation pipe, due to gravity and the influence of the special internal structure, the liquid water gradually settles and accumulates at the bottom of the pipe, while the hydrogen flows upward and is discharged through the vent. At the same time, the separated liquid water drives the bottom support plate to collect the water, thus causing the liquid water to accumulate stably in the tank. This design achieves efficient gas-liquid separation and automatic water discharge, improves the purity and circulation efficiency of hydrogen, and avoids the electrode active area caused by liquid water retention. It effectively solves the problems of droplet entrainment and hydrogen purity reduction in traditional gas-liquid separation devices under high humidity and high flow rate conditions.

[0015] 2. When the water level inside the tank rises or falls, the floating ring moves up and down accordingly, which in turn moves the linkage rod up and down, causing the rotating column to rotate. This causes the ball to rotate inside the limit ring. At this time, the return pipe will absorb the water on the bottom support plate. The return pipe guides the flow of the separated water, directing the water from the input pipe to the return pipe, and finally discharging it from the device. The mounting bracket supports the return pipe and provides a sliding track for the linkage rod, ensuring that the linkage rod slides smoothly, thereby driving the return pipe to operate stably. This achieves effective water discharge and stability of the internal structure of the device. Attached Figure Description

[0016] Figure 1 A perspective view of a hydrogen fuel cell gas-water separation device provided by this utility model;

[0017] Figure 2 A schematic diagram of the tank structure of a hydrogen fuel cell gas-water separation device provided by this utility model;

[0018] Figure 3A schematic diagram of the separation component structure of a hydrogen fuel cell gas-water separation device provided by this utility model;

[0019] Figure 4 A schematic diagram of the return water pipe structure of a hydrogen fuel cell gas-water separation device provided by this utility model;

[0020] Figure 5 A schematic diagram of the water absorption component structure of a hydrogen fuel cell gas-water separation device provided by this utility model;

[0021] Figure 6 A schematic diagram of the reflux pipe structure of a hydrogen fuel cell gas-water separation device provided by this utility model.

[0022] Legend:

[0023] 1. Tank body;

[0024] 2. Separation assembly; 21. Inlet pipe; 22. Diverter pipe; 23. Gas-liquid separator pipe; 24. Vent hole; 25. Bottom support plate;

[0025] 3. Water absorption assembly; 31. Mounting bracket; 32. Linkage rod; 33. Rotating column; 34. Limit ring; 35. Ball retainer; 36. Return pipe; 37. Floating ring; 38. Water return pipe;

[0026] 4. Water outlet pipe; 5. Air outlet pipe. Detailed Implementation

[0027] 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.

[0028] like Figure 1 - Figure 2 As shown, this embodiment provides a technical solution: a hydrogen fuel cell gas-water separation device, including a tank 1, a water outlet pipe 4 fixedly connected to the bottom end of the tank 1, and a gas outlet pipe 5 fixedly connected to the top end of the tank 1.

[0029] Tank 1 is used to contain a mixture of hydrogen and water and to provide a space for the gas-water separation process to take place. Tank 1 is usually designed with some structures inside to enhance the gas-water separation effect. Water outlet pipe 4 is used to discharge the separated liquid water from tank 1. It is set at the lowest point of tank 1 to ensure that the water can be completely discharged. Gas outlet pipe 5 is used to discharge the separated hydrogen from tank 1.

[0030] like Figure 1- Figure 3 As shown, the separation component 2 includes an input pipe 21 fixedly connected inside the tank body 1. One end of the input pipe 21 is fixedly connected to a diversion pipe 22. The bottom end of the diversion pipe 22 is fixedly connected to a gas-liquid separation pipe 23. A vent hole 24 is opened at the top outer side of the gas-liquid separation pipe 23. The bottom end of the gas-liquid separation pipe 23 is fixedly connected to a bottom support plate 25.

[0031] The inlet pipe 21 is the entrance to the entire separation assembly 2, responsible for introducing the mixed gas containing hydrogen and water into the tank 1, providing the mixture to be processed for the subsequent separation process. The diversion pipe 22 is connected to the inlet pipe 21, and its main function is to divert the input mixed gas, so that the gas can be evenly distributed into the gas-liquid separation pipe 23, increasing the contact area between the gas and the separation assembly 2, and promoting gas-liquid separation. The gas-liquid separation pipe 23 is the core part of the separation assembly 2, and its internal structure and design help to further separate hydrogen and water. When the mixed gas enters the gas-liquid separation pipe 23, due to gravity and the inside of the pipe... Due to the special structure, liquid water gradually settles and accumulates at the bottom of the tube, while hydrogen flows upward and eventually exits through the vent 24. The vent 24 is located at the top outer side of the gas-liquid separation tube 23 and is used to discharge the separated hydrogen. The size and distribution of the vent 24 are carefully designed to ensure that the hydrogen can be discharged smoothly while preventing the leakage of liquid water. The bottom support plate 25 is fixedly connected to the bottom end of the gas-liquid separation tube 23 and mainly serves to support and collect liquid water, providing a stable collection area for the separated liquid water and preventing water from flowing around in the tank 1, which would affect the separation effect.

[0032] like Figure 2 - Figure 6 As shown, a water absorption assembly 3 is fixedly connected inside the separation assembly 2. The water absorption assembly 3 includes a return pipe 36 fixedly connected to the input pipe 21. A limit ring 34 is fixedly connected inside the return pipe 36. A retaining ball 35 is rotatably connected inside the limit ring 34. A rotating column 33 is threadedly connected inside the retaining ball 35. A linkage rod 32 is fixedly connected to the top of the rotating column 33. A floating ring 37 is fixedly connected to the end of the linkage rod 32 away from the rotating column 33. The outer side of the floating ring 37 is slidably connected to the inner wall of the tank 1. The inner side of the moving coil 37 is slidably connected to the outer side of the return pipe 36. The four corners of the inner wall of the tank 1 are fixedly connected to the mounting brackets 31. The inner side of the mounting brackets 31 is fixedly connected to the outer side of the return pipe 36. The outer side of the linkage rod 32 is slidably connected to the inner side of the mounting bracket 31. The outer side of the rotating column 33 passes through the outer side of the limiting ring 34 and extends into the inner side of the return pipe 36. The near ends of the four return pipes 36 are fixedly connected to the return water pipes 38. The outer side of the return water pipes 38 is fixedly connected to the inner side of the bottom support plate 25 and extends into the bottom.

[0033] The return pipe 36 is a channel connecting the input pipe 21 and the return pipe 38, used to guide the flow of separated water, ensuring that water can flow smoothly from the input pipe 21 to the return pipe 38 and finally be discharged from the device. The limiting ring 34 is fixed inside the return pipe 36, mainly to limit the movement range of the retaining ball 35, ensuring that the retaining ball 35 can rotate within a predetermined area, thereby controlling the opening size of the return pipe 36. The retaining ball 35 is installed inside the limiting ring 34 and, through a threaded connection with the rotating column 33, can rotate under the drive of the rotating column 33, thereby changing the opening size of the return pipe 36 and controlling the flow rate and speed of water. The top end of the rotating column 33 is connected to the linkage rod 32, and the bottom end is threaded to the retaining ball 35. When the linkage rod 32 drives the rotating column 33 to rotate, the rotating column 33 will drive the retaining ball 35 to rotate inside the limiting ring 34, thereby adjusting the opening size of the return pipe 36. One end is connected to the rotating column 33, and the other end is connected to the floating ring 37. When the floating ring 37 floats up and down due to changes in water level, the linkage rod 32 will drive the rotating column 33 to rotate, thereby adjusting the position of the locking ball 35 and controlling the opening size of the return pipe 36. The outer side of the floating ring 37 is slidably connected to the inner wall of the tank 1, and the inner side is slidably connected to the outer side of the return pipe 36. When the water level inside the tank 1 rises or falls, the floating ring 37 will float up and down accordingly, driving the rotating column 33 to rotate through the linkage rod 32, thereby adjusting the opening size of the return pipe 36. The mounting bracket 31 is fixed at the four corners of the inner wall of the tank 1 to support the return pipe 36 and provide a sliding track for the linkage rod 32, ensuring that the linkage rod 32 can slide up and down smoothly while maintaining a good connection with the rotating column 33. The return water pipe 38 connects the four return pipes 36, collects the water and discharges it from the tank 1, and finally discharges it through the bottom support plate 25.

[0034] Working principle:

[0035] like Figure 1 - Figure 6 As shown:

[0036] In use: First, a mixture of hydrogen and water enters the tank 1 through the input pipe 21, which then drives the diversion pipe 22 to divide the mixture, ensuring it is evenly distributed into the gas-liquid separation pipe 23. This initiates the gas-liquid separation process, achieving initial separation of hydrogen and water. Inside the gas-liquid separation pipe 23, due to gravity and the special structure within the pipe, the liquid water gradually settles and accumulates at the bottom, while the hydrogen flows upward and is discharged through the vent 24. Simultaneously, the separated liquid water causes the bottom support plate 25 to collect the water, thus stabilizing the water level within the tank 1 and preventing water from flowing freely. When the water level rises or falls, the floating ring 37 floats up and down, which in turn drives the linkage rod 32 to move up and down, thereby driving the rotating column 33 to rotate. This causes the locking ball 35 to rotate inside the limiting ring 34, achieving automatic adjustment of the opening size of the return pipe 36. At this time, the return pipe 36 will absorb the water on the bottom support plate 25, thereby avoiding the accumulation of water. The return pipe 36 guides the flow of separated water, directing the water from the input pipe 21 to the return water pipe 38, and finally discharging it from the device. The mounting bracket 31 supports the return pipe 36 and provides a sliding track for the linkage rod 32, ensuring that the linkage rod 32 slides smoothly, thereby driving the return pipe 36 to operate stably, achieving effective water discharge and stability of the internal structure of the device.

[0037] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model in any other way. Any person skilled in the art may make changes or modifications to the above-disclosed technical content to create equivalent embodiments for application in other fields. However, any simple modifications, equivalent changes, and modifications made to the above embodiments based on the technical essence of the present utility model without departing from the technical solution of the present utility model shall still fall within the protection scope of the technical solution of the present utility model.

Claims

1. A hydrogen fuel cell gas water separation device comprising a can body (1), characterized in that ； The separation component (2) includes an input pipe (21) fixedly connected inside the tank (1), a diversion pipe (22) fixedly connected to one end of the input pipe (21), a gas-liquid separation pipe (23) fixedly connected to the bottom end of the diversion pipe (22), a vent hole (24) opened at the top of the outer side of the gas-liquid separation pipe (23), a bottom support plate (25) fixedly connected to the bottom end of the gas-liquid separation pipe (23), and a water absorption component (3) fixedly connected inside the separation component (2).

2. The hydrogen fuel cell gas-water separation device according to claim 1, characterized in that: The water absorption assembly (3) includes a return pipe (36) fixedly connected to the input pipe (21). A limit ring (34) is fixedly connected inside the return pipe (36). A retaining ball (35) is rotatably connected inside the limit ring (34). A rotating column (33) is threadedly connected inside the retaining ball (35). A linkage rod (32) is fixedly connected to the top of the rotating column (33).

3. The hydrogen fuel cell gas-water separation device according to claim 2, characterized in that: The end of the linkage rod (32) away from the rotating column (33) is fixedly connected to a floating ring (37). The outer side of the floating ring (37) is slidably connected to the inner wall of the tank (1), and the inner side of the floating ring (37) is slidably connected to the outer side of the return pipe (36).

4. A hydrogen fuel cell gas-water separation device according to claim 2, characterized in that: The inner wall of the tank (1) is fixedly connected to four corners of the mounting bracket (31). The inside of the mounting bracket (31) is fixedly connected to the outside of the return pipe (36), and the outside of the linkage rod (32) is slidably connected to the inside of the mounting bracket (31).

5. A hydrogen fuel cell gas-water separation device according to claim 2, characterized in that: The outer side of the rotating column (33) passes through the outer side of the limiting ring (34) and extends into the interior of the return pipe (36). The bottom end of the tank (1) is fixedly connected to the water outlet pipe (4), and the top end of the tank (1) is fixedly connected to the air outlet pipe (5).

6. A hydrogen fuel cell gas-water separation device according to claim 2, characterized in that: The four return pipes (36) are fixedly connected to a return water pipe (38) at one close end. The outer side of the return water pipe (38) is fixedly connected to the inside of the bottom support plate (25) and extends to the bottom.

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