Hydrogen fuel cell ejector and steam-water separator integrated structure

Abstract

The utility model relates to a hydrogen fuel cell ejector and steam-water separator integrated structure which comprises a shell, a snakelike coil pipe serving as an ejector pipeline is arranged in the shell, the snakelike coil pipe is provided with four vertical sections formed by vertically bending towards the interior of the shell, and the four vertical sections form a water baffle for realizing steam-water separation. One end of the snakelike coil pipe is communicated with fluid in the hydrogen storage tank, the other end of the snakelike coil pipe is connected with a nozzle for spraying the fluid into a hydrogen reactor, the steam-water separator and the ejector are integrated, and the snakelike coil pipe serving as an ejector pipeline is also used as a baffle in a traditional steam-water separator, so that steam-water separation is realized; the overall structure of the system is more compact; fluid heat in the steam-water separator is used for heating the ejector, the heat utilization efficiency of the system is also improved, and compared with a traditional pipeline connection mode, the flow resistance of fluid in the process of flowing from the steam-water separator to the ejector is reduced.

Description

Technical Field

[0001] This utility model relates to the field of hydrogen energy technology, and in particular to an integrated structure of a hydrogen fuel cell ejector and a gas-water separator. Background Technology

[0002] During the operation of a hydrogen fuel cell, unreacted hydrogen gas needs to pass through a vapor-water separator before being recycled back to the hydrogen inlet. The vapor-water separator uses multiple baffles to remove mixed liquid water, preventing liquid water from entering the fuel cell stack, clogging the gas diffusion layer, causing flooding, and affecting the normal operation of the fuel cell stack. At the same time, a pipe-shaped ejector is configured for backflow and pressure control, in order to generate a mixed fluid with a pressure higher than the low-pressure intake fluid but lower than the high-pressure moving fluid. This mixed fluid is accelerated into a high-speed fluid through a nozzle and enters the reactor for reaction.

[0003] In existing technologies, water-water separation is achieved by setting baffles arranged at intervals inside the water-water separator. However, since the water-water separator and the ejector are connected by pipes, the flow process will cause a large flow resistance to the fluid. At the same time, a separate heating device is required to heat the ejector pipe. Therefore, this split structure occupies a large space, and the fluid separated by the water-water separator is directly discharged outside the separator, resulting in low heat utilization of the entire system. Utility Model Content

[0004] The technical problem to be solved by this utility model is: in order to overcome the shortcomings of the prior art, this utility model provides a compact integrated structure of hydrogen fuel cell ejector and gas-water separator that is conducive to reducing flow resistance and improving heat utilization.

[0005] The technical solution adopted by this utility model to solve its technical problem is: an integrated structure of hydrogen fuel cell ejector and gas-water separator, including a shell, a serpentine coil provided inside the shell, the serpentine coil having a baffle plate that bends vertically inward to the inside of the shell to achieve gas-water separation, a first liquid inlet pipe connected to the upper end face of the shell to receive the fluid flowing out of the hydrogen storage tank, one end of the serpentine coil vertically upward connected to the first liquid inlet pipe, the other end of the serpentine coil horizontally extending to the right outside the right side wall of the shell and connected to a nozzle for injecting fluid into the hydrogen reactor, a second liquid inlet pipe connected to the upper part of the left side wall of the shell to receive the secondary fluid discharged from the hydrogen reactor, a drain outlet opened on the bottom wall on the right side of the shell to discharge the separated water droplets outside the shell, and a mixing chamber covering the nozzle installed on the right side wall of the shell.

[0006] The serpentine coil is composed of a first coil, a second coil, a third coil, and a fourth coil connected in sequence. One side of the first coil is arranged alongside the first inlet pipe to form a first baffle plate. The other side of the first coil is arranged alongside one side of the second coil to form a second baffle plate. The other side of the second coil is arranged alongside one side of the third coil to form a third baffle plate. The other side of the third coil is arranged alongside one side of the fourth coil to form a fourth baffle plate. The other side of the fourth coil is connected to the nozzle through a straight pipe.

[0007] The first and second water baffles are vertically downward, while the third and fourth water baffles are vertically upward. The first water baffle is located on the right side of the housing, the third water baffle is located on the left side of the housing, the second water baffle is located between the third and fourth water baffles, and the fourth water baffle is located between the first and second water baffles.

[0008] The inner bottom surface of the shell is an inclined plane sloping from left to right, and the drain outlet is located on the bottom wall of the shell at the lowest end of the inclined plane.

[0009] The beneficial effects of this utility model are as follows: This utility model integrates the steam-water separator and the ejector into one unit, and utilizes the serpentine coil, which serves as the ejector pipe, to also act as a baffle in the traditional steam-water separator, thereby achieving steam-water separation. The overall structure of the system is more compact. Furthermore, the use of the heat from the fluid in the steam-water separator to heat the ejector also improves the system's heat utilization efficiency. Compared with the traditional pipe connection method, it reduces the flow resistance of the fluid flowing from the steam-water separator to the ejector. Attached Figure Description

[0010] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0011] Figure 1 This is a three-dimensional structural schematic diagram of the present invention.

[0012] Figure 2 This is a schematic diagram of the main structure of this utility model.

[0013] Figure 3 This is a three-dimensional structural schematic diagram of the serpentine coil described in this utility model.

[0014] Figure 4 This is a schematic diagram of the fluid movement inside the shell in this utility model.

[0015] In the diagram: 1. Shell, 2. Snake-shaped coil, 2-1. First coil, 2-2. Second coil, 2-3. Third coil, 2-4. Fourth coil, 3. First inlet pipe, 4. Nozzle, 5. Second inlet pipe, 6. Drain, 7. Mixing chamber, 8-1. First baffle, 8-2. Second baffle, 8-3. Third baffle, 8-4. Fourth baffle. Detailed Implementation

[0016] The present invention will now be described in further detail with reference to the accompanying drawings. These drawings are simplified schematic diagrams, illustrating only the basic structure of the present invention, and therefore only show the components relevant to the present invention.

[0017] like Figures 1-3 The diagram shows an integrated structure of a hydrogen fuel cell ejector and a vapor-water separator, including a housing 1 with a right-angled trapezoidal cross-section serving as the outer shell of the vapor-water separator. The bottom edge of the housing 1 is the hypotenuse of the right-angled trapezoid. The inner bottom surface of the housing 1 is an inclined plane sloping from left to right. A drain outlet 6 is provided on the bottom wall of the housing 1 at the lowest point on the right side of the inclined plane to discharge the separated water droplets outside the housing 1. A first liquid inlet pipe 3 is installed on the right side of the middle of the upper end face of the housing 1, with its inner end vertically extending into the housing 1. The first liquid inlet pipe 3 receives the fluid flowing out of the hydrogen storage tank. A nozzle 4 is provided on the outer side of the right side wall of the housing 1 to inject the fluid into the hydrogen reactor. A second liquid inlet pipe 5 is connected to the upper part of the left side wall of the housing 1 to receive the secondary fluid discharged from the hydrogen reactor. A mixing chamber 7 is installed on the upper part of the right side wall of the housing 1, which encloses the nozzle 4.

[0018] The shell 1 is provided with a serpentine coil 2 inside. The serpentine coil 2 is integrated into the shell 1 of the steam-water separator as an ejector pipe. The serpentine coil 2 has four vertically arranged sections that bend vertically into the shell 1 at intervals. The four vertical sections constitute a baffle plate to achieve steam-water separation.

[0019] Specifically, the serpentine coil 2 is composed of a first coil 2-1, a second coil 2-2, a third coil 2-3, and a fourth coil 2-4 connected sequentially. The first coil 2-1, second coil 2-2, third coil 2-3, and fourth coil 2-4 are shaped like channel steel, with one side slightly shorter than the other. The first coil 2-1 and second coil 2-2 are located inside the upper part of the housing 1 with their openings facing downwards, while the third coil 2-3 and fourth coil 2-4 are located inside the lower part of the housing 1 with their openings facing upwards. The right side of the first coil 2-1 is connected to the first... The inlet pipes 3 are connected side by side to form the first baffle plate 8-1. The left side of the first coil 2-1 is connected side by side with the right side of the second coil 2-2 to form the second baffle plate 8-2. A right-angle pipe is connected to the left side of the second coil 2-2. The vertical part of the right-angle pipe is connected side by side with the left side of the third coil 2-3 to form the third baffle plate 8-3. The right side of the third coil 2-3 is connected side by side with the left side of the fourth coil 2-4 to form the fourth baffle plate 8-4. The right side of the fourth coil 2-4 is connected to the nozzle 4 through a straight pipe.

[0020] The first baffle plate 8-1 and the second baffle plate 8-2 are vertically downward, while the third baffle plate 8-3 and the fourth baffle plate 8-4 are vertically upward. The first baffle plate 8-1 is located on the right side of the housing 1, the third baffle plate 8-3 is located on the left side of the housing 1, the second baffle plate 8-2 is located between the third baffle plate 8-3 and the fourth baffle plate 8-4, and the fourth baffle plate 8-4 is located between the first baffle plate 8-1 and the second baffle plate 8-2. The third baffle plate 8-3 and the fourth baffle plate 8-4 are at the same height, while the bottom surfaces of the first baffle plate 8-1 and the fourth baffle plate 8-4 are lower than the top surfaces of the third baffle plate 8-3 and the fourth baffle plate 8-4. Thus, the third baffle plate 8-3, the second baffle plate 8-2, the fourth baffle plate 8-4, and the first baffle plate 8-1 are arranged alternately from left to right within the housing 1.

[0021] Workflow: See Figure 4 A schematic diagram of fluid motion, in which Figure 4 The solid arrows in the diagram indicate the direction of motion of the primary fluid, while the dashed arrows indicate the direction of motion of the secondary fluid.

[0022] Initial ejection: The primary fluid flowing out of the hydrogen storage tank flows into the first inlet pipe 3 and is accelerated into a high-speed fluid through the nozzle 4, and enters the hydrogen reactor to carry out the primary reaction;

[0023] Secondary fluid inflow: The secondary fluid from the hydrogen reactor enters the shell 1 of the steam-water separator through the second inlet pipe 5 and rushes towards the baffle plate of the serpentine coil 2, which acts as a baffle.

[0024] Initial separation: Under the obstruction of the first baffle plate 8-1, the second baffle plate 8-2, the third baffle plate 8-3 and the fourth baffle plate 8-4, the water droplets are initially separated from the fluid due to inertia. The water droplets gather at the bottom of the shell 1 and are discharged through the drain port 6, while the fluid continues to flow inside the shell 1.

[0025] Ejector inlet heating: The fluid in the steam-water separator heats the serpentine coil 2, which serves as the ejector pipe, thereby improving the working conditions of the ejector and increasing the kinetic energy of the ejected high-speed fluid.

[0026] Secondary ejection: The primary fluid re-enters and is accelerated by nozzle 4, while simultaneously driving the secondary fluid after water separation to mix in mixing chamber 7 before entering the hydrogen reactor for reaction.

[0027] This invention integrates a steam-water separator and an ejector into one unit. The serpentine coil 2, which serves as the ejector pipe, also acts as a baffle in a traditional steam-water separator to achieve steam-water separation. The heat from the fluid in the steam-water separator is used to heat the ejector inlet, which saves installation space, makes the overall structure of the steam-water separator more compact, and improves the heat utilization efficiency of the system. Compared with the traditional pipe connection method, it reduces the flow resistance of the fluid flowing from the steam-water separator to the ejector.

[0028] Based on the above-described preferred embodiments of this utility model, and through the foregoing description, those skilled in the art can make various changes and modifications without departing from the technical concept of this utility model. The technical scope of this utility model is not limited to the contents of the specification, but must be determined according to the scope of the claims.

Claims

1. An integrated structure of a hydrogen fuel cell ejector and a vapor-water separator, characterized in that: The device includes a housing (1), inside which is provided a serpentine coil (2). The serpentine coil (2) has a baffle plate that bends vertically into the housing (1) to achieve gas-water separation. The upper end of the housing (1) is connected to a first inlet pipe (3) for receiving fluid flowing out of the hydrogen storage tank. One end of the serpentine coil (2) is vertically upward connected to the first inlet pipe (3). The other end of the serpentine coil (2) extends horizontally to the right outside the right side wall of the housing (1) and is connected to a nozzle (4) for injecting fluid into the hydrogen reactor. The upper part of the left side wall of the housing (1) is connected to a second inlet pipe (5) for receiving secondary fluid discharged from the hydrogen reactor. A drain outlet (6) is provided on the bottom wall on the right side of the housing (1) to discharge the separated water droplets out of the housing (1). A mixing chamber (7) covering the nozzle (4) is installed on the right side wall of the housing (1).

2. The integrated structure of hydrogen fuel cell ejector and gas-water separator as described in claim 1, characterized in that: The serpentine coil (2) is formed by connecting the first coil (2-1), the second coil (2-2), the third coil (2-3), and the fourth coil (2-4) in sequence. One side of the first coil (2-1) is connected to the first inlet pipe (3) to form the first baffle plate (8-1). The other side of the first coil (2-1) is connected to the second coil (2-2) to form the second baffle plate (8-2). The other side of the second coil (2-2) is connected to the third coil (2-3) to form the third baffle plate (8-3). The other side of the third coil (2-3) is connected to the fourth coil (2-4) to form the fourth baffle plate (8-4). The other side of the fourth coil (2-4) is connected to the nozzle (4) through a straight pipe.

3. The integrated structure of hydrogen fuel cell ejector and gas-water separator as described in claim 2, characterized in that: The first baffle plate (8-1) and the second baffle plate (8-2) are vertically downward, and the third baffle plate (8-3) and the fourth baffle plate (8-4) are vertically upward. The first baffle plate (8-1) is located on the right side of the shell (1), the third baffle plate (8-3) is located on the left side of the shell (1), the second baffle plate (8-2) is located between the third baffle plate (8-3) and the fourth baffle plate (8-4), and the fourth baffle plate (8-4) is located between the first baffle plate (8-1) and the second baffle plate (8-2).

4. The integrated structure of hydrogen fuel cell ejector and gas-water separator as described in claim 1, characterized in that: The inner bottom surface of the shell (1) is an inclined surface that slopes from left to right, and the drain outlet (6) is opened on the bottom wall of the shell (1) at the lowest end of the inclined surface.

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