Gas-liquid separation device and electrolytic hydrogen production equipment

Abstract

The utility model relates to the technical field of electrolytic hydrogen production, in particular to a gas-liquid separation device and electrolytic hydrogen production equipment, and the gas-liquid separation device comprises a shell which is provided with a connecting inlet, an exhaust port and a liquid discharge port; the tube plate is arranged in the shell, the inner space of the shell is divided into an exhaust cavity and a liquid storage cavity by the tube plate, the exhaust port is communicated with the exhaust cavity, and the liquid discharge port is communicated with the liquid storage cavity; the tube plate is provided with an airflow channel which is communicated with the exhaust cavity; a liquid outlet is formed in the tube plate and can be communicated with the liquid storage cavity. According to the gas-liquid separation device, the pipe plate is arranged in the shell, the height space layout is compact, pipeline connection is simple, internal secondary drainage is achieved, a secondary drainage pipeline, a secondary liquid level control structure and other structures do not need to be additionally arranged on the shell, the use amount of valves is reduced, and on the basis of ensuring the water separation effect, compared with an existing coalescence separator, the gas-liquid separation device has the advantages that the structure is simple, and the cost is low. According to the gas-liquid separation device, the structure and the pipeline layout are effectively simplified.

Description

Technical Field

[0001] The present application relates to the technical field of electrolytic hydrogen production, and particularly to a gas-liquid separation device and an electrolytic hydrogen production device. Background Art

[0002] Currently, in the existing water electrolysis hydrogen production system, efficient gas-liquid separation can reduce equipment costs and improve process effects. The gas-liquid separator using a gas-liquid coalescence filter element has a filtration accuracy of up to 0.1 um. However, there are difficulties: 1) The coalescence separation effect is related to the liquid carry-over at the inlet, and a large amount of liquid water needs to be removed by pre-separation or primary separation; 2) In order to discharge the coalesced droplets, a secondary liquid storage cavity and a drain port need to be added, and the pipeline connection is complex; 3) The height space is easily limited and requires a compact layout. Utility Model Content

[0003] The purpose of the present application is to provide a gas-liquid separation device and an electrolytic hydrogen production device, so as to solve to a certain extent the technical problems in the existing technology that the existing coalescence separator requires pre-separation and an additional secondary drainage structure, resulting in a complex structure of the coalescence separator and a complex pipeline connection.

[0004] The present application provides a gas-liquid separation device, including:

[0005] A housing, the housing is provided with a connection inlet, an exhaust port, and a liquid discharge port;

[0006] A tube sheet, the tube sheet is arranged inside the housing, the tube sheet divides the internal space of the housing into an exhaust cavity and a liquid storage cavity, the exhaust port is communicated with the exhaust cavity, and the liquid discharge port is communicated with the liquid storage cavity;

[0007] The tube sheet is provided with an air flow channel, and the air flow channel is communicated with the exhaust cavity;

[0008] The tube sheet is provided with a liquid outlet, and the liquid outlet can be communicated with the liquid storage cavity.

[0009] In the above technical solution, further, the tube sheet includes:

[0010] A connecting plate portion, the connecting plate portion is connected to the inner wall surface of the housing;

[0011] A liquid guiding plate portion, the liquid guiding plate portion includes a surrounding plate and a panel which are connected to each other, the surrounding plate is connected to the connecting plate portion, and along the gas flow direction, the diameter of the surrounding plate gradually decreases; the air flow channel is arranged on the panel.

[0012] In any of the above technical solutions, further, the gas-liquid separation device further includes a liquid drainage baffle, which is arranged in the housing. The height of the liquid drainage baffle extends along the height direction of the housing. The liquid drainage baffle is connected to the tube sheet, and is spaced from the inner wall surface of the housing. A liquid drainage channel communicating with the liquid storage cavity is formed between the liquid drainage baffle and the inner wall surface of the housing; the liquid outlet is communicated with the liquid drainage channel.

[0013] In any of the above technical solutions, further, the gas-liquid separation device further includes a liquid seal plate, which includes a first plate portion and a second plate portion arranged at an angle. The first plate portion is connected to the inner wall surface of the housing below the liquid drainage baffle, and the second plate portion faces the inner wall surface of the housing. A part of the liquid drainage baffle is located between the second plate portion and the inner wall surface of the housing, and neither the first plate portion nor the second plate portion contacts the liquid drainage baffle.

[0014] In any of the above technical solutions, further, the gas-liquid separation device further includes a coalescing filter element, which is arranged in the exhaust cavity, and one end of the air flow channel away from the tube sheet is connected to the coalescing filter element.

[0015] In any of the above technical solutions, further, the gas-liquid separation device further includes a wire mesh, which is arranged in the housing or on the tube sheet;

[0016] The height of the position where the wire mesh is located is lower than the height of the position where the air flow channel is located.

[0017] In any of the above technical solutions, further, the connection inlet is communicated with the liquid storage cavity, and the height of the position where the connection inlet is located is lower than the height of the position where the wire mesh is located.

[0018] In any of the above technical solutions, further, the housing is provided with a first liquid level detection port and a second liquid level detection port, and the height of the position where the first liquid level detection port is located is higher than the height of the position where the second liquid level detection port is located;

[0019] The first liquid level detection port and the second liquid level detection port are respectively communicated with the liquid storage cavity;

[0020] The height of the position where the liquid discharge port is located is lower than the height of the position where the second liquid level detection port is located.

[0021] In any of the above technical solutions, further, the gas-liquid separation device further includes a liquid level detection device, and the first liquid level detection port and the second liquid level detection port are respectively provided with the liquid level detection device.

[0022] The present application also provides an electrolytic hydrogen production device, which includes the gas-liquid separation device described in any of the above technical solutions. Therefore, it has all the beneficial technical effects of this gas-liquid separation device, and will not be elaborated here.

[0023] Compared with the prior art, the beneficial effects of the present application are as follows:

[0024] The gas-liquid separation device provided by the present application includes: a housing, which is provided with a connection inlet, an exhaust port and a liquid discharge port; a tube sheet, which is arranged inside the housing, and the tube sheet divides the internal space of the housing into an exhaust cavity and a liquid storage cavity. The exhaust port is communicated with the exhaust cavity, and the liquid discharge port is communicated with the liquid storage cavity; the tube sheet is provided with an air flow channel, and the air flow channel is communicated with the exhaust cavity; the tube sheet is provided with a liquid outlet, and the liquid outlet can be communicated with the liquid storage cavity.

[0025] For the gas-liquid separation device provided by the present application, by arranging a tube sheet inside the housing, the height space layout is compact, the pipeline connection is simple, and internal secondary drainage is realized. There is no need to additionally arrange structures such as secondary drainage pipelines and secondary liquid level control for the housing, and the number of valves used is reduced. On the basis of ensuring the water separation effect, compared with the existing coalescing separator, the structure and pipeline layout of this gas-liquid separation device are effectively simplified.

[0026] The electrolytic hydrogen production device provided by the present application includes the above-mentioned gas-liquid separation device. Therefore, through this gas-liquid separation device, gas-liquid separation can be carried out, the gas-liquid separation effect is good, the structure is simple, there are few external pipelines and joints, the operation is stable, and the difficulty of maintenance and repair is low. Description of the Drawings

[0027] In order to more clearly illustrate the specific embodiments of the present application or the technical solutions in the prior art, the following will briefly introduce the drawings required for use in the description of the specific embodiments or the prior art. Obviously, the drawings in the following description are some embodiments of the present application. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0028] Figure 1 It is a schematic structural diagram of the gas-liquid separation device provided in Embodiment 1 of the present application;

[0029] Figure 2 It is a schematic structural diagram of the gas-liquid separation device provided in Embodiment 2 of the present application.

[0030] Reference Signs:

[0031] 1 - Housing, 101 - Connection inlet, 102 - Exhaust port, 103 - Drain port, 2 - Tube sheet, 201 - Connection plate part, 202 - Liquid guide plate part, 2021 - Enclosure, 2022 - Panel, 203 - Air flow channel, 3 - Exhaust cavity, 4 - Liquid storage cavity, 5 - Drain baffle, 501 - Drain channel, 6 - Liquid seal plate, 601 - First plate part, 602 - Second plate part, 7 - Liquid storage space, 8 - Coalescing filter element, 9 - First liquid level detection port, 10 - Second liquid level detection port, 11 - Wire mesh. Detailed implementation manners

[0032] The technical solutions of the present application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are some, but not all, of the embodiments of the present application.

[0033] Generally, the components of the embodiments of the present application described and shown in the drawings here can be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of the present application provided in the drawings is not intended to limit the scope of the present application claimed, but merely represents the selected embodiments of the present application.

[0034] All other embodiments obtained by those of ordinary skill in the art based on the embodiments in the present application without creative efforts shall fall within the protection scope of the present application.

[0035] In the description of the present application, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation to the present application. In addition, the terms "first", "second", "third" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0036] In the description of the present application, it should be noted that unless otherwise clearly specified and limited, the terms "installed", "connected", "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to specific situations.

[0037] The following refers to Figure 1 and Figure 2 Describe the gas-liquid separation device and electrolytic hydrogen production equipment described in the embodiments of the present application.

[0038] In a first aspect, embodiments of the present application provide the following two gas-liquid separation devices. The gas-liquid separation device provided in this embodiment is particularly applicable to a coalescing gas-liquid separator for PEM.

[0039] Embodiment 1. Refer to Figure 1 As shown, Embodiment 1 of the present application provides a gas-liquid separation device. The gas-liquid separation device includes: a housing 1 and a tube sheet 2 disposed inside the housing 1. Among them, the edge of the tube sheet 2 is connected to the inner wall surface of the housing 1, thereby dividing the internal space of the housing 1 into an exhaust chamber 3 and a liquid storage chamber 4. A connection inlet 101, an exhaust port 102, and a liquid discharge port 103 are provided on the side wall of the housing 1. Among them, the connection inlet 101 is used to introduce a gas-liquid mixture into the housing 1. Preferably, the installation position of the connection inlet 101 is lower than the installation position of the tube sheet 2; the exhaust port 102 is communicated with the exhaust chamber 3, and the liquid discharge port 103 is communicated with the liquid storage chamber 4. The tube sheet 2 is provided with an air flow channel 203, and the air flow channel 203 is communicated with the exhaust chamber 3. After the gas-liquid mixture flows into the housing 1 through the connection inlet 101, the liquid settles and accumulates in the liquid storage chamber 4. Preferably, the liquid discharge port 103 is provided at the bottom of the housing 1. The liquid accumulated in the liquid storage chamber 4 can finally be discharged out of the housing 1 through the liquid discharge port 103. The gas rises and flows into the exhaust chamber 3 through the air flow channel 203. The gas in the exhaust chamber 3 can finally be discharged out of the housing 1 through the exhaust port 102.

[0040] The tube sheet 2 is provided with a liquid outlet, and the liquid outlet can be communicated with the liquid storage chamber 4. A small amount of liquid carried by the gas will be separated from the gas again during the flow of the gas and fall on the tube sheet 2. The liquid falling on the tube sheet 2 can flow into the liquid storage chamber 4 through the liquid outlet to be mixed with the liquid in the liquid storage chamber 4.

[0041] Specifically, the tube sheet 2 includes a connecting plate portion 201 and a liquid guiding plate portion 202. The connecting plate portion 201 and the liquid guiding plate portion 202 are connected to each other. Preferably, the connecting plate portion 201 and the liquid guiding plate portion 202 have an integral structure and are integrally processed and formed. A liquid outlet is opened on the connecting plate portion 201, and the liquid outlet penetrates the upper and lower surfaces of the connecting plate portion 201. The connecting plate portion 201 has an annular structure. The annular structure of the connecting plate portion 201 has an inner ring and an outer ring. The shape of the outer ring is adapted to the cross-sectional shape of the housing 1, and the outer ring edge is connected to the inner wall surface of the housing 1. The liquid guiding plate portion 202 is disposed inside the inner ring.

[0042] The liquid guide plate part 202 includes a surrounding plate 2021 and a panel 2022. The panel 2022 is connected to the surrounding plate 2021. Preferably, the panel 2022 and the surrounding plate 2021 have an integral structure and are integrally processed and formed. Among them, the surrounding plate 2021 has a cylindrical structure. The surrounding plate 2021 is coaxially arranged with the connecting plate part 201, and the upper surface of the surrounding plate 2021 bulges upward relative to the upper surface of the connecting plate part 201. Along the flowing direction of the gas flowing into the housing 1, the diameter of the surrounding plate 2021 gradually decreases, so that the whole surrounding plate 2021 is in a horn shape, and a guiding inclined surface is formed on the outer surface of the surrounding plate 2021. The liquid flowing into the exhaust cavity 3 along with the air flow can fall to the tube plate 2 and then flow along the guiding inclined surface to the connecting plate part 201, and finally the liquid flows out through the liquid outlet to the liquid storage cavity 4.

[0043] It should be noted that by optimizing the structure of the tube plate 2, the tube plate 2 has an upwardly arched structure, which increases the height of the liquid storage cavity 4 below the tube plate 2, effectively improves the highest liquid level of the liquid storage cavity 4, and increases the volume of the liquid storage cavity 4. At the same time, since the tube plate 2 is upwardly arched, it also increases the flow path of the gas carrying liquid droplets between the connection inlet 101 and the air flow channel 203. There is enough height space margin above the liquid level in the liquid storage cavity 4 to ensure that under the action of gravity, most of the liquid in the gas-liquid mixture can sink and be stored in the liquid storage cavity 4, reducing the amount of moisture carried in the gas.

[0044] The shape of the panel 2022 is adapted to the shape of the upper port of the surrounding plate 2021 (that is, the port with a smaller diameter). At least one air flow channel 203 is provided on the panel 2022. Preferably, in this embodiment, the number of the air flow channels 203 is specifically determined by the number of the coalescing filters 8 described below. The liquid storage cavity 4 and the exhaust cavity 3 are locally communicated through the air flow channel 203, so that the gas in the gas-liquid mixture flowing in through the connection inlet 101 can flow upward through the air flow channel 203 and into the exhaust cavity 3.

[0045] Furthermore, the gas-liquid separation device further includes a liquid discharge baffle 5. One end of the liquid discharge baffle 5 is connected to the edge of the liquid outlet on the connecting plate part 201, and the other end of the liquid discharge baffle 5 extends towards the bottom of the liquid storage cavity 4. Preferably, the liquid discharge baffle 5 is connected to the side position of the liquid outlet away from the inner wall of the housing 1. The shape of the liquid discharge baffle 5 can be a flat plate or an arc-shaped plate. When the liquid discharge baffle 5 is an arc-shaped plate, the radian of the liquid discharge baffle 5 is adapted to the radian of the inner wall surface of the housing 1. The height of the liquid discharge baffle 5 is arranged in the same direction as the height of the housing 1, and the liquid discharge baffle 5 is spaced from the inner wall surface of the housing 1, so that a liquid discharge channel 501 is formed between the liquid discharge baffle 5 and the inner wall surface of the housing 1. The liquid falling in the exhaust cavity 3 falls to the connecting plate part 201 and then flows into the liquid storage cavity 4 through the liquid outlet and the liquid discharge channel 501.

[0046] Further, the gas-liquid separation device further includes a liquid seal plate 6. The liquid seal plate 6 includes a first plate portion 601 and a second plate portion 602 which are connected to each other. Preferably, the first plate portion 601 and the second plate portion 602 have an integral structure and are vertically distributed. The first plate portion 601 is located below the liquid discharge baffle 5, and one side edge of the first plate portion 601 is connected to the inner wall surface of the housing 1. The second plate portion 602 is arranged facing the inner wall surface of the housing 1 and is spaced from the housing 1. The lower end portion of the liquid discharge baffle 5 is located between the second plate portion 602 and the housing 1. The liquid discharge baffle 5 does not contact the first plate portion 601 and the second plate portion 602. The liquid discharge baffle 5 and the liquid seal plate 6 jointly define a U-shaped liquid storage space 7. The liquid flowing down along the liquid discharge channel 501 first converges in the liquid storage space 7, and this part of the liquid forms a liquid seal structure in the liquid storage space 7, which can block the gas in the gas-liquid mixture flowing into the housing 1 through the connection inlet 101 from flowing into the liquid discharge channel 501. When the accumulated amount of liquid in the liquid storage space 7 is greater than the carrying capacity of the liquid storage space 7, the liquid can overflow into the liquid storage chamber 4 and converge with the liquid in the liquid storage chamber 4.

[0047] Further, the gas-liquid separation device further includes a coalescing filter element 8. The coalescing filter element 8 is arranged in the exhaust chamber 3. The coalescing filter element 8 is a common device in the field of gas-liquid separation and has hydrophilic properties. It can not only filter out mechanical impurities in the medium but also separate the moisture flowing into the exhaust chamber 3 with the gas. Preferably, in this embodiment, the number of the coalescing filter elements 8 is at least two, and all the coalescing filter elements 8 are spaced on the panel 2022. The number of the air flow channels 203 on the panel 2022 is the same as and corresponds to the number of the coalescing filter elements 8 one by one. The moisture flowing into the air flow channels 203 together with the gas is separated from the gas after flowing through the coalescing filter elements 8, and the separated liquid flows to the enclosing plate 2021 and the connecting plate portion 201.

[0048] Further, a first liquid level detection port 9 and a second liquid level detection port 10 are provided on the side wall of the housing 1. Both the first liquid level detection port 9 and the second liquid level detection port 10 are communicated with the liquid storage chamber 4, and the first liquid level detection port 9 is located above the second liquid level detection port 10. The first liquid level detection port 9 is used to reflect the highest liquid level of the liquid storage chamber 4, and the second liquid level detection port 10 is used to reflect the lowest liquid level of the liquid storage chamber 4. When the liquid level in the liquid storage chamber 4 reaches the highest liquid level, the drain valve of the drain port 103 is manually or electrically controlled to open to drain the liquid in the liquid storage chamber 4. When the liquid level in the liquid storage chamber 4 reaches the lowest liquid level, the drain valve is closed.

[0049] Furthermore, the gas-liquid separation device further includes a liquid level detection device, specifically a liquid level gauge. The first liquid level detection port 9 and the second liquid level detection port 10 are respectively provided with a liquid level detection device, and the liquid level in the liquid storage cavity 4 is detected and monitored by the liquid level detection device to timely and accurately judge the liquid level situation in the liquid storage cavity 4.

[0050] In summary, for the gas-liquid separation device provided in this application, by arranging a tube sheet 2 in the housing 1, the height space layout is compact, the pipeline connection is simple, and internal secondary drainage is realized. There is no need to additionally arrange structures such as secondary drainage pipelines and secondary liquid level control for the housing 1, reducing the usage amount of valves. On the basis of ensuring the water separation effect, compared with the existing coalescing separator, the gas-liquid separation device effectively simplifies the structure and pipeline layout.

[0051] In addition, for the gas-liquid separation device provided in this embodiment, through the structural optimization of the tube sheet 2, there is enough margin in the local height between the tube sheet 2 and the highest liquid level of the liquid storage cavity 4, so that gas-liquid primary separation can be achieved by gravity without installing the wire mesh 11.

[0052] Embodiment Two. Refer to Figure 2 As shown, Embodiment Two of this application provides another gas-liquid separation device, and this gas-liquid separation device includes all the contents in Embodiment One above.

[0053] In addition, the gas-liquid separation device provided in this Embodiment Two further includes a wire mesh 11. The wire mesh 11 is arranged in the housing 1, and the edge of the wire mesh 11 is connected to the inner wall surface of the housing 1. Preferably, in this embodiment, the wire mesh 11 is arranged on the tube sheet 2. The liquid guiding plate portion 202 of the tube sheet 2 arches upward, so that a receiving space is formed below the liquid guiding plate portion 202. The wire mesh 11 is arranged in the receiving space, and the edge of the wire mesh 11 is connected to the lower surface of the liquid guiding plate portion 202, and the mesh surface of the wire mesh 11 faces the panel 2022. So that the gas in the gas-liquid mixture flowing into the housing 1 through the connection inlet 101 can first flow through the wire mesh 11. The wire mesh 11 is formed with a plurality of pores. When the gas flows through the wire mesh 11, the droplet diameter entrained by the gas can be made less than 100um, avoiding excessive liquid entrainment caused by gas flow entrainment, liquid surface oscillation, etc., ensuring the efficient water separation of the coalescing filter element 8. Most of the liquid in the air flow is blocked by the wire mesh 11, improving the gas-liquid separation effect and reducing the liquid separation pressure of the coalescing filter element 8, which helps to extend the service life of the coalescing filter element 8 to a certain extent.

[0054] In summary, the gas-liquid separation device provided by the present application has a compact height space layout and simple pipeline connection by arranging a tube sheet 2 in the housing 1, realizing internal secondary drainage. There is no need to additionally arrange structures such as secondary drainage pipelines and secondary liquid level control for the housing 1, reducing the usage of valves. On the basis of ensuring the water separation effect, compared with the existing coalescence separator, the gas-liquid separation device of the present application effectively simplifies the structure and pipeline layout.

[0055] In addition, the gas-liquid separation device provided by this embodiment can further improve the separation effect and efficiency by installing a wire mesh 11.

[0056] In the second aspect, the embodiments of the present application also provide an electrolytic hydrogen production device, including the gas-liquid separation device described in any of the above embodiments. Therefore, it has all the beneficial technical effects of the gas-liquid separation device, which will not be elaborated here.

[0057] In summary, the electrolytic hydrogen production device provided by the present application has good gas-liquid separation effect, simple structure, few external pipelines and joints, stable operation, and low maintenance and repair difficulty.

[0058] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, not to limit them; although the present application has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements on some or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A gas-liquid separation device, characterized in that: include: A housing, wherein the housing is provided with a connecting inlet, an exhaust port and a drain port; a tube sheet, the tube sheet being arranged in the shell, the tube sheet dividing the inner space of the shell into an exhaust cavity and a liquid storage cavity, the exhaust port being communicated with the exhaust cavity, and the liquid discharge port being communicated with the liquid storage cavity; The tube sheet is provided with an air flow channel, and the air flow channel is communicated with the exhaust cavity; The tube sheet is provided with a liquid outlet, and the liquid outlet can be communicated with the liquid storage cavity.

2. The gas-liquid separation device according to claim 1, characterized in that: The tube sheet comprises: A connecting plate portion, the connecting plate portion being connected to the inner wall surface of the shell; The liquid guide plate portion comprises a surrounding plate and a panel connected to each other, the surrounding plate is connected to the connecting plate portion, and the diameter of the surrounding plate gradually decreases along the gas flow direction; the air flow channel is arranged on the panel.

3. The gas-liquid separation device according to claim 1, characterized in that: The gas-liquid separation device also includes a drainage baffle, which is arranged in the shell. The height of the drainage baffle extends along the height direction of the shell. The drainage baffle is connected to the tube plate. The drainage baffle is spaced apart from the inner wall surface of the shell. A drainage channel connected to the liquid storage chamber is formed between the drainage baffle and the inner wall surface of the shell; the liquid outlet is connected to the drainage channel.

4. The gas-liquid separation device according to claim 3, characterized in that: The gas-liquid separation device also includes a liquid sealing plate, which includes a first plate portion and a second plate portion arranged at an angle, the first plate portion being connected to the inner wall surface of the shell below the liquid drainage baffle, the second plate portion being arranged facing the inner wall surface of the shell, a portion of the liquid drainage baffle being located between the second plate portion and the inner wall surface of the shell, and neither the first plate portion nor the second plate portion is in contact with the liquid drainage baffle.

5. The gas-liquid separation device according to claim 1, characterized in that: The gas-liquid separation device further comprises a coalescing filter element, which is arranged in the exhaust cavity, and one end of the air flow channel away from the tube plate is connected to the coalescing filter element.

6. The gas-liquid separation device according to claim 1, characterized in that: The gas-liquid separation device further comprises a wire mesh, wherein the wire mesh is arranged in the shell, or the wire mesh is arranged on the tube sheet; The height of the wire mesh is lower than the height of the air flow channel.

7. The gas-liquid separation device according to claim 6, characterized in that: The connecting inlet is communicated with the liquid storage cavity, and the connecting inlet is located at a height lower than the screen.

8. The gas-liquid separation device according to any one of claims 1 to 7, characterized in that: The housing is provided with a first liquid level detection port and a second liquid level detection port, and the height of the first liquid level detection port is higher than the height of the second liquid level detection port; The first liquid level detection port and the second liquid level detection port are respectively connected to the liquid storage cavity; The height of the position of the liquid discharge port is lower than the height of the position of the second liquid level detection port.

9. The gas-liquid separation device according to claim 8, characterized in that: The gas-liquid separation device further includes a liquid level detection device, and the first liquid level detection port and the second liquid level detection port are respectively provided with the liquid level detection device.

10. An electrolytic hydrogen production device, characterized in that: A gas-liquid separation device comprising the gas-liquid separation device according to any one of claims 1 to 9.

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