Separation device for hydrogen and water and hydrogen fuel cell system

Abstract

The utility model discloses a separation device for hydrogen and water and a hydrogen fuel cell system, and relates to the technical field of hydrogen fuel cell systems, the separation device can be applied to an electric pile of the hydrogen fuel cell system, and a hydrogen-water mixture output by the electric pile is input into a first pipeline from an input opening; due to the fact that the first pipeline is vertically arranged and the input opening is located in the top of the first pipeline, in the first pipeline, the hydrogen-water mixture moves downwards, and in the downward movement process, water molecules and water vapor in the hydrogen-water mixture are condensed on the side wall of the first pipeline and flow into the second pipeline. And the hydrogen is output from the hydrogen output opening, and the first distance is greater than the second distance, so that the first distance can ensure that the hydrogen-water mixture has enough distance in the movement process and can be condensed into water. Thus, the hydrogen and water separation device provided by the embodiment of the utility model can separate hydrogen and water, reduce moisture in hydrogen entering the electric pile, and ensure the service life of the electric pile.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of hydrogen fuel cell systems, and particularly relates to a separation device for hydrogen and water and a hydrogen fuel cell system. BACKGROUND

[0002] A hydrogen fuel cell is used to convert the chemical energy of hydrogen into electrical energy, and water is generated during operation. The water contains unreacted hydrogen. In the related art, a gas-liquid separator is usually installed at the outlet of the stack of the hydrogen fuel cell to separate hydrogen from water. The water is discharged from the gas-liquid separator, and the hydrogen is recycled to continue the reaction in the stack. Although the gas-liquid separator can separate hydrogen from water, the hydrogen passing through the gas-liquid separator still contains a large amount of water molecules or water vapor, which will adversely affect the stack and reduce the service life of the stack. CONTENT OF THE UTILITY MODEL

[0003] The present application aims to at least solve one of the technical problems in the prior art. To this end, the present application provides a separation device for hydrogen and water and a hydrogen fuel cell system, which can separate hydrogen and water, reduce the water content in the hydrogen entering the stack, and ensure the service life of the stack.

[0004] The separation device for hydrogen and water according to the first aspect of the present application comprises:

[0005] The body is provided with a first pipe and a second pipe. The first pipe is vertically arranged, and the bottom of the first pipe is in communication with the second pipe. The first pipe and the second pipe are perpendicular to each other. The top of the first pipe is provided with an input opening for receiving a hydrogen-water mixture. The side wall of the first pipe is provided with a hydrogen gas output opening. The first distance between the hydrogen gas output opening and the input opening is greater than the second distance between the hydrogen gas output opening and the bottom of the first pipe. The hydrogen gas output opening is used to output hydrogen in the hydrogen-water mixture. The second pipe is used to store water in the hydrogen-water mixture.

[0006] The separation device for hydrogen and water according to the embodiments of the present application has at least the following beneficial effects: the separation device can be applied to an electric pile of a hydrogen fuel cell system, the hydrogen-water mixture output by the electric pile is input into the first pipeline from the input opening, the hydrogen-water mixture moves downward in the first pipeline because the first pipeline is vertically arranged and the input opening is located at the top of the first pipeline, the water molecules in the hydrogen-water mixture condense on the side wall of the first pipeline and flow into the second pipeline during the downward movement, and the hydrogen is output from the hydrogen output opening, and the first distance is greater than the second distance, which can ensure that the hydrogen-water mixture has enough distance to condense into water during the movement. Therefore, the separation device for hydrogen and water according to the embodiments of the present application can separate hydrogen and water, reduce the water content in the hydrogen entering the electric pile, and ensure the service life of the electric pile.

[0007] According to some embodiments of the first aspect of the present application, the separation device further comprises an ejector and a hydrogen output pipeline, one end of the hydrogen output pipeline is arranged in the hydrogen output opening, and the other end of the hydrogen output pipeline is connected to the ejector.

[0008] According to some embodiments of the first aspect of the present application, the body is a metal product.

[0009] According to some embodiments of the first aspect of the present application, the separation device further comprises an input pipeline, one end of the input pipeline is arranged in the input opening, and the other end of the input pipeline is connected to the gas-liquid separator.

[0010] According to some embodiments of the first aspect of the present application, the second pipeline is provided with a liquid output port, and the liquid output port is used to discharge the water in the second pipeline.

[0011] According to some embodiments of the first aspect of the present application, the separation device further comprises a switch valve, the switch valve is installed on the liquid output port, and the switch valve is used to open or close the liquid output port.

[0012] According to some embodiments of the first aspect of the present application, the second distance is 10 mm.

[0013] According to some embodiments of the first aspect of the present application, the separation device further comprises a water level sensor, the water level sensor is arranged inside the second pipeline, the water level sensor is electrically connected to the switch valve, and the water level sensor is used to detect the water level in the second pipeline.

[0014] According to some embodiments of the first aspect of the present application, the separation device further comprises a mounting plate, the first pipeline and the second pipeline are arranged on the mounting plate, the opposite two side walls of the second pipeline form mounting grooves with the mounting plate respectively, and mounting holes are arranged on the bottom wall of the mounting grooves.

[0015] The second aspect embodiment of the present application provides a hydrogen fuel cell system, comprising:

[0016] The separation device for hydrogen and water as claimed in any one of the first aspect embodiments;

[0017] The electric pile;

[0018] The gas-liquid separator, one end of the gas-liquid separator is communicated with the output port of the electric pile, and the other end is communicated with the input opening of the separation device for hydrogen and water; the input port of the electric pile is communicated with the hydrogen gas output opening of the separation device for hydrogen and water.

[0019] Additional aspects and advantages of the present application will be in part apparent and in part pointed out hereinafter. BRIEF DESCRIPTION OF DRAWINGS

[0020] The present application will be further described below in conjunction with the drawings and embodiments, wherein:

[0021] Figure 1 The structure diagram of the separation device of the embodiment of the present application;

[0022] Figure 2 The structure diagram of the separation device of the embodiment of the present application from another angle;

[0023] Figure 3 The application diagram in the separation device of the embodiment of the present application.

[0024] Reference signs: first pipeline 100; input pipeline 110; hydrogen gas output pipeline 120; second pipeline 200; liquid output port 210; switch valve 220; mounting plate 300; mounting hole 310; ejector 400; gas-liquid separator 500. DETAILED DESCRIPTION

[0025] The embodiments of the present application are described in detail below, examples of which are shown in the drawings, wherein the same or similar reference signs represent the same or similar elements or elements with the same or similar functions throughout. The embodiments described below by referring to the drawings are exemplary, only for explaining the present application, and cannot be understood as limiting the present application.

[0026] In the description of the present application, it should be understood that the orientation description, such as the orientation or position relationship indicated by up, down, front, back, left, right, etc. is based on the orientation or position relationship shown in the drawings, only for the convenience of describing the present application and simplifying the description, and does not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application.

[0027] In the description of the present application, the meaning of several is more than one, the meaning of multiple is more than two, greater than, less than, more than, etc. are understood as not including the number, above, below, within, etc. are understood as including the number. If it is described as first, second, it is only used for the purpose of distinguishing technical features, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of indicated technical features or the sequence of indicated technical features.

[0028] In the description of the present application, unless otherwise explicitly limited, the words such as setting, installing, connecting, etc. should be broadly understood, and those skilled in the art can reasonably determine the specific meaning of the above words in the present application in combination with the specific content of the technical scheme.

[0029] In the description of the present application, the description of the terms "one embodiment", "some embodiments", "exemplary embodiment", "example", "specific example", or "some examples" means that the specific features, structures, materials or characteristics described in combination with the embodiment or example are included in at least one embodiment or example of the present application. In the present specification, the exemplary description of the above terms does not necessarily refer to the same embodiment or example. Moreover, the described specific features, structures, materials or characteristics can be combined in any one or more embodiments or examples in a suitable manner.

[0030] Referring to Figures 1 to 3 , Figure 1 It is a structural schematic diagram of a separation device of an embodiment of the present application. Figure 2 It is a structural schematic diagram of another angle of a separation device of an embodiment of the present application. Figure 3 It is a schematic diagram applied in a separation device of an embodiment of the present application. The separation device of the embodiment of the present application comprises a body, the body is provided with a first pipeline 100 and a second pipeline 200, the first pipeline 100 is vertically arranged, the bottom of the first pipeline 100 is communicated with the second pipeline 200, and the first pipeline 100 and the second pipeline 200 are perpendicular to each other; the top of the first pipeline 100 is provided with an input opening, the input opening is used for receiving a hydrogen water mixture; the side wall of the first pipeline 100 is provided with a hydrogen gas output opening, the first distance between the hydrogen gas output opening and the input opening is greater than the second distance between the hydrogen gas output opening and the bottom of the first pipeline 100, and the hydrogen gas output opening is used for outputting hydrogen gas in the hydrogen water mixture; the second pipeline 200 is used for storing water in the hydrogen water mixture.

[0031] The hydrogen and water separation device according to the embodiments of this application has at least the following beneficial effects: The separation device of this application embodiment can be applied to the stack of a hydrogen fuel cell system. The hydrogen-water mixture output from the stack enters the first pipe 100 through the input opening. Since the first pipe 100 is vertically arranged and the input opening is located at the top of the first pipe 100, the hydrogen-water mixture moves downward in the first pipe 100. During the downward movement, water molecules and water vapor in the hydrogen-water mixture condense on the side wall of the first pipe 100 and flow into the second pipe 200. Hydrogen is output from the hydrogen output opening, and since the first distance is greater than the second distance, the first distance can ensure that the hydrogen-water mixture has sufficient distance to condense into water during the movement. Thus, the hydrogen and water separation device of this application embodiment can separate hydrogen and water, reduce the moisture content in the hydrogen entering the stack, and ensure the service life of the stack.

[0032] It is worth noting that the hydrogen-water mixture is output from the fuel cell stack, and the hydrogen-water mixture refers to a mixture of hydrogen gas and water.

[0033] Understandably, referring to Figure 3 The separation device in this embodiment further includes an ejector 400 and a hydrogen output pipe 120. One end of the hydrogen output pipe 120 passes through a hydrogen output opening, and the other end is connected to the ejector 400. The ejector 400 can generate negative pressure by utilizing the continuous high-speed flow of fluid to draw passive fluid into the ejector 400 for mixing and acceleration. The ejector 400 is connected to the input port of the fuel cell stack for inputting hydrogen into the fuel cell stack.

[0034] Understandably, the main body is made of metal, which has good thermal conductivity, facilitating the condensation of water vapor into water, thus aiding in the separation of water and hydrogen in the hydrogen-water mixture. In one embodiment, the main body is made of SUS316L material, which has strong corrosion resistance, ensuring the service life of the separation device.

[0035] Understandably, referring to Figure 3 The separation device in this embodiment further includes an input pipe 110, one end of which passes through an input opening, and the other end of which is connected to a gas-liquid separator 500. The gas-liquid separator 500 is connected to the fuel cell stack. Thus, the hydrogen-water mixture output from the fuel cell stack first undergoes gas-liquid separation in the gas-liquid separator 500 before being input into the input opening. Further gas-liquid separation is performed by the separation device in this embodiment, which can further reduce the amount of water molecules and water vapor in the hydrogen-water mixture.

[0036] It can be understood that the second distance is 10 mm, so that the water in the second pipeline 200 can be prevented from flowing into the hydrogen output pipeline 120. The first distance is not specifically limited in the present application, and can be set according to actual needs by those skilled in the art.

[0037] It can be understood that, with reference to Figure 1 , the second pipeline 200 is provided with a liquid output port 210 for discharging water in the second pipeline 200.

[0038] It can be understood that, with reference to Figure 2 , the separation device of the embodiment of the present application further comprises a switch valve 220 installed on the liquid output port 210, and the switch valve 220 is used to open or close the liquid output port 210. By closing the liquid output port 210 through the switch valve 220, the hydrogen gas is prevented from flowing out of the liquid output port 210, thereby avoiding waste, and when water needs to be discharged, the liquid output port 210 is opened through the switch valve 220.

[0039] It can be understood that the separation device of the embodiment of the present application further comprises a water level sensor (not shown in the figure) arranged inside the second pipeline 200, and the water level sensor is electrically connected with the switch valve 220. The water level sensor is used to detect the water level in the second pipeline 200. When the water level sensor detects that the water level in the second pipeline 200 reaches a preset water level, a signal is sent to the switch valve 220 to open the liquid output port 210 to discharge water.

[0040] It can be understood that, with reference to Figure 1 and Figure 2 , the separation device of the embodiment of the present application further comprises a mounting plate 300, and the first pipeline 100 and the second pipeline 200 are arranged on the mounting plate 300. The opposite two side walls of the second pipeline 200 form mounting grooves with the mounting plate 300, respectively, and mounting holes 310 are arranged on the bottom wall of the mounting grooves. The number of the mounting grooves is 2, and the two mounting grooves are located on the opposite two sides of the second pipeline 200. The mounting holes 310 on the bottom wall of the mounting grooves are provided in plurality. The body is mounted on an external device for fixing the body through the mounting holes 310 on the mounting plate 300. For example, the body is mounted on the external device for fixing the body by passing screws or rivets through the mounting holes 310.

[0041] The second aspect embodiment of the present application provides a hydrogen fuel cell system, which comprises the separation device for hydrogen and water of the first aspect embodiment, and further comprises a stack and a gas-liquid separator 500. One end of the gas-liquid separator 500 is in communication with an output port of the stack, and the other end is in communication with an input opening of the separation device for hydrogen and water. An input port of the stack is in communication with a hydrogen output opening of the separation device for hydrogen and water.

[0042] The hydrogen-water mixture output by the stack is first subjected to gas-liquid separation in the gas-liquid separator 500, and then input into the input opening. Since the first pipeline 100 is vertically arranged and the input opening is located at the top of the first pipeline 100, in the first pipeline 100, the hydrogen-water mixture moves downward, and in the process of moving downward, the water molecules in the hydrogen-water mixture condense with water vapor on the side wall of the first pipeline 100 and flow into the second pipeline 200. The hydrogen gas is output from the hydrogen gas output opening, and since the first distance is greater than the second distance, the first distance can ensure that the hydrogen-water mixture has enough distance to condense into water in the process of moving. In this way, the separation device for hydrogen gas and water in the embodiment of the present application can separate hydrogen gas and water, reduce the water content in the hydrogen gas entering the stack, and ensure the service life of the stack.

[0043] The above describes the embodiments of the present application in detail in combination with the drawings, but the present application is not limited to the above embodiments, and various changes can be made within the knowledge of those skilled in the art without departing from the purpose of the present application. In addition, the embodiments of the present application and the features in the embodiments can be combined with each other without conflict.

Claims

1. A device for separating hydrogen and water, characterized in that, The utility model relates to a hydrogen water separation device, comprising: A body is provided with a first pipeline and a second pipeline, the first pipeline is vertically arranged, the bottom of the first pipeline is communicated with the second pipeline, and the first pipeline and the second pipeline are perpendicular to each other; The top of the first pipeline is provided with an input opening for receiving a hydrogen water mixture; The side wall of the first pipeline is provided with a hydrogen gas output opening, the first distance between the hydrogen gas output opening and the input opening is greater than the second distance between the hydrogen gas output opening and the bottom of the first pipeline, and the hydrogen gas output opening is used for outputting hydrogen in the hydrogen water mixture; The second pipeline is used for storing water in the hydrogen water mixture.

2. The device for separation of hydrogen and water according to claim 1, characterized in that, It also includes an ejector and a hydrogen gas output pipeline, one end of the hydrogen gas output pipeline is provided in the hydrogen gas output opening, and the other end is communicated with the ejector.

3. The apparatus for separating hydrogen and water according to claim 1, wherein The body is a metal product.

4. The apparatus for separating hydrogen and water of claim 1, wherein, It also includes an input pipeline, one end of the input pipeline is provided in the input opening, and the other end of the input pipeline is used for being communicated with a gas-liquid separator.

5. The apparatus for separation of hydrogen and water of claim 1, wherein, The second pipeline is provided with a liquid output port for discharging water in the second pipeline.

6. The device for separating hydrogen and water according to claim 5, characterized in that, It also includes a switch valve, the switch valve is installed on the liquid output port, and the switch valve is used to open or close the liquid output port.

7. The apparatus for separating hydrogen and water of claim 1, wherein, The second distance is 10mm.

8. The device for separation of hydrogen and water according to claim 6, characterized in that, It also includes a water level sensor, the water level sensor is arranged in the second pipeline, the water level sensor is electrically connected with the switch valve, and the water level sensor is used to detect the water level in the second pipeline.

9. The apparatus for separation of hydrogen and water of claim 1, wherein, It also includes a mounting plate, the first pipeline and the second pipeline are arranged on the mounting plate, the opposite two side walls of the second pipeline form mounting grooves with the mounting plate respectively, and mounting holes are arranged on the bottom wall of the mounting grooves.

10. A hydrogen fuel cell system characterized by comprising: The utility model relates to a hydrogen water separation device, comprising: The hydrogen water separation device according to any one of claims 1 to 9; A stack; A gas-liquid separator, one end of the gas-liquid separator is communicated with the output port of the stack, the other end is communicated with the input opening of the hydrogen water separation device, and the input port of the stack is communicated with the hydrogen gas output opening of the hydrogen water separation device.

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