Separation device

Abstract

This application discloses a separation device relating to the field of hydrogen energy technology. The separation device includes a tank, a mist-catching mesh, and a swirling structure. The tank forms a gas collection chamber, with an exhaust port at the top and a drain port at the bottom. An air inlet is located on one side of the tank. The exhaust port, drain port, and air inlet are connected to the gas collection chamber. The mist-catching mesh is disposed within the tank and includes a first annular mesh segment, a second annular mesh segment, and a third annular mesh segment. The inner width of the first annular mesh segment is greater than the inner width of the third annular mesh segment, and the inner width of the second annular mesh segment gradually decreases from the first annular mesh segment to the third annular mesh segment. The swirling structure is disposed within the gas collection chamber and forms a centrifugal channel with the inner circumferential wall of the tank. The centrifugal channel is connected to the air inlet. The technical solution provided in this application employs a multi-segment mesh for droplet capture, adapting to gas-liquid separation at different power levels under varying loads in hydrogen production, thereby achieving more thorough separation of hydrogen and water vapor.

Description

Technical Field

[0001] The embodiments in this application relate to the field of hydrogen energy technology, and in particular to a separation device. Background Technology

[0002] Flexible water electrolysis for hydrogen production is an advanced hydrogen production technology that dynamically adjusts hydrogen production power based on the fluctuating characteristics of renewable energy sources, thereby efficiently converting unstable electrical energy into hydrogen for storage. This technology, through the adoption of flexible electrolyzer design and intelligent control system, achieves stable operation under different power loads, improving the adaptability and economy of the water electrolysis hydrogen production system. Flexible water electrolysis for hydrogen production not only effectively solves the problems of intermittency and instability of renewable energy sources but also promotes the diversified use of energy and sustainable development.

[0003] In the process of hydrogen production through water electrolysis, hydrogen and oxygen often carry water mist into subsequent equipment, affecting its operation. Existing gas-water separators mainly rely on gravity separation and collision-droplet separation technologies. However, in flexible water electrolysis hydrogen production processes, the hydrogen production power is constantly changing, and the flow rate of the mixed gas also changes accordingly, resulting in poor separation of hydrogen and water vapor. Utility Model Content

[0004] Several embodiments in this application propose a separation device aimed at providing a more thorough separation device for hydrogen and water vapor.

[0005] One embodiment of this application provides a separation device used for hydrogen production via water electrolysis, comprising:

[0006] The tank body has a gas collection chamber. The upper part of the tank body is provided with an exhaust port, the lower part of the tank body is provided with a drain port, and one side of the tank body is provided with an air inlet. The exhaust port, the drain port, and the air inlet are connected to the gas collection chamber.

[0007] A mist-catching mesh is disposed inside the tank and near the exhaust port. The mist-catching mesh includes a first annular mesh segment, a second annular mesh segment, and a third annular mesh segment. The inner cavity width of the first annular mesh segment is greater than the inner cavity width of the third annular mesh segment, and the inner cavity width of the second annular mesh segment gradually decreases from the first annular mesh segment to the third annular mesh segment.

[0008] A swirl structure is disposed within the gas collecting chamber and forms a centrifugal channel with the inner peripheral wall of the tank body. The centrifugal channel is connected to the air inlet.

[0009] In one embodiment, the second annular mesh segment has a first opening near the first annular mesh segment and a second opening near the third annular mesh segment, wherein the diameter of the first opening is equal to the inner cavity width of the first annular mesh segment, and the diameter of the second opening is equal to the inner cavity width of the third annular mesh segment.

[0010] In one embodiment, the first ring network segment, the second ring network segment, and the third ring network segment are arranged at intervals along a first direction.

[0011] In one embodiment, the swirling structure has a spiral groove, which, together with the inner peripheral wall of the tank, forms the centrifugal channel.

[0012] In one embodiment, the centrifugal channel has a centrifugal inlet and a centrifugal outlet, the centrifugal inlet being connected to the air inlet, and the centrifugal outlet being located below the centrifugal inlet.

[0013] In one embodiment, the tank body includes a first tank body, a second tank body, and a transition tank body, wherein the inner diameter of the first tank body is larger than the inner diameter of the second tank body, and the first tank body and the second tank body are connected through the transition tank body;

[0014] The first annular mesh segment is disposed on the inner peripheral wall of the first tank; the second annular mesh segment is disposed on the inner peripheral wall of the transition tank; the third annular mesh segment is disposed on the inner peripheral wall of the second tank.

[0015] The exhaust port is located on the side of the first tank facing away from the second tank, and the drain port is located on the side of the second tank facing away from the first tank.

[0016] In one embodiment, the inner peripheral wall of the transition tank is configured as an annular arc surface connecting the first tank and the second tank.

[0017] In one embodiment, the diameter of the mist-catching wire mesh is 0.1 mm to 0.3 mm, and / or,

[0018] The porosity of the mist-catching wire mesh is greater than or equal to 97%.

[0019] In one embodiment, the diameter of the mist-catching wire mesh is 0.28 mm.

[0020] In one embodiment, the vortex structure includes two spaced-apart horizontal plates and a vertical plate connecting the two horizontal plates, and the two horizontal plates, the vertical plate, and the inner peripheral wall of the tank form the centrifugal channel.

[0021] The two horizontal plates are welded to the tank body.

[0022] In several embodiments provided in this application, a swirling structure is provided at the inlet of the mixed gas, so that the swirling structure and the inner circumferential wall of the tube form a centrifugal channel. When the mixed gas of hydrogen and water vapor enters the centrifugal channel, the hydrogen and water vapor will separate due to the action of centrifugal force, thereby making the separation more thorough. Specifically, the separation device includes a tank, a mist-catching mesh, and a vortex structure. The upper part of the tank has an exhaust port for hydrogen output, and the lower part of the tank has a drain port for water vapor output. The air inlet is located on one side of the tank. When the mixed gas enters the tank, it first passes through the centrifugal channel formed by the vortex structure. Due to the different masses of hydrogen and water vapor, under the action of centrifugal force, the heavier water vapor is thrown to the outer wall of the centrifugal channel, while the lighter hydrogen is concentrated in the central area of ​​the centrifugal channel, thus achieving separation. The separated hydrogen and water vapor rise simultaneously. The mist-catching mesh has three annular mesh segments with different inner cavity widths, which can adapt to the gas-liquid separation of hydrogen production under different power levels. It is more reliable for capturing water vapor during variable load processes. The separated hydrogen is output through the exhaust port, and the captured water vapor is liquefied and discharged through the drain port at the bottom of the tank.

[0023] The entire separation process first uses a cyclone structure for centrifugal separation, and then uses a multi-segment wire mesh for adsorption separation. This dual separation makes the separation of hydrogen and water vapor more thorough and improves the purity of the output hydrogen. Attached Figure Description

[0024] To more clearly illustrate the technical solutions in the embodiments or prior art of this application, the drawings used in the description of the embodiments or prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0025] Figure 1 A schematic diagram of the structure of an embodiment of the separation device provided in this application;

[0026] Figure 2 for Figure 1 A schematic diagram of the vortex structure.

[0027] Explanation of icon numbers:

[0028] 100. Separation device; 1. Tank; 11. First tank; 12. Transition tank; 13. Second tank; 1a. Gas collection chamber; 1b. Centrifugal channel; 2. Fog-collecting mesh; 21. First annular mesh segment; 22. Second annular mesh segment; 221. First opening; 222. Second opening; 23. Third annular mesh segment; 3. Swirl structure; 31. Horizontal plate; 32. Vertical plate; 3a. Spiral groove; 3b. Centrifugal inlet; 3c. Centrifugal outlet; 4. Exhaust port; 5. Drain port; 6. Air inlet; 61. Guide pipe; 611. Straight pipe; 612. Bend. Detailed Implementation

[0029] The technical solutions of this application will be clearly and completely described below with reference to the accompanying drawings of several embodiments. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of the embodiments. Based on the embodiments of this application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of this application.

[0030] It should be noted that if directional indications (such as up, down, left, right, front, back, etc.) are involved in multiple embodiments of this application, the directional indications are only used to explain the relative positional relationship and movement of the components in a specific posture. If the specific posture changes, the directional indications will also change accordingly.

[0031] Furthermore, if multiple embodiments of this application involve descriptions such as "first" or "second," these descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the use of "and / or" or "and / or" throughout the text implies three parallel solutions. For example, "A and / or B" includes solution A, solution B, or a solution where both A and B are satisfied simultaneously. Furthermore, the technical solutions of various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed in this application.

[0032] Water electrolysis is the process of using electrical energy to break down water into hydrogen and oxygen in an electrolyzer. During the reaction, water molecules are decomposed into gaseous hydrogen and oxygen. In the process of producing hydrogen through water electrolysis, hydrogen and oxygen often carry water mist into subsequent equipment. This is because the temperature inside the electrolyzer is usually high, causing some liquid water to evaporate into water vapor, which mixes with the generated hydrogen and oxygen, affecting equipment operation. Existing gas-water separators mainly rely on gravity separation and collision-droplet separation technologies. However, in flexible water electrolysis for hydrogen production, the hydrogen production power is constantly changing, and the flow rate of the mixed gas also varies accordingly, resulting in poor separation of hydrogen and water vapor.

[0033] In view of the above problems, this application proposes a separation device 100 to solve the aforementioned technical problems.

[0034] Please see Figure 1 In one embodiment of this application, the separation device 100 includes a tank, a mist-catching mesh 2, and a vortex structure 3. The tank forms a gas collection chamber 1a, with an exhaust port 4 at the top and a drain port 5 at the bottom. An air inlet 6 is provided on one side of the tank. The exhaust port 4, drain port 5, and air inlet 6 are connected to the gas collection chamber 1a. The mist-catching mesh 2 is disposed inside the tank 1 and close to the exhaust port 4. The mist-catching mesh 2 includes a first annular mesh segment 21, a second annular mesh segment 22, and a third annular mesh segment 23. The inner width of the first annular mesh segment 21 is greater than the inner width of the third annular mesh segment 23. The inner width of the second annular mesh segment 22 gradually decreases from the first annular mesh segment 21 to the third annular mesh segment 23. The vortex structure 3 is disposed inside the gas collection chamber 1a and forms a centrifugal channel 1b with the inner peripheral wall of the tank. The centrifugal channel 1b is connected to the air inlet 6.

[0035] The separation device 100 proposed in this application is used in a flexible water electrolysis hydrogen production process. Flexible water electrolysis hydrogen production can dynamically adjust the hydrogen production power according to the fluctuating characteristics of renewable energy, thereby efficiently converting unstable electrical energy into hydrogen for storage. This technology, through the adoption of a flexible electrolyzer design and an intelligent control system, achieves stable operation under different power loads, improving the adaptability and economy of the water electrolysis hydrogen production system. Flexible water electrolysis hydrogen production not only effectively solves the problems of intermittency and instability of renewable energy, but also promotes the diversified utilization of energy and sustainable development.

[0036] Therefore, a mist-catching mesh 2 is installed at one end of the tank 1 near the exhaust port 4. The working principle of the mist-catching mesh 2 is based on inertia and interception mechanism. When the hydrogen gas after centrifugation through the centrifugal channel 1b still contains a small amount of water vapor, when the mixture of hydrogen and water vapor passes through the mist-catching mesh 2, the droplets in the water vapor deviate from the airflow direction due to inertia and collide with the fine filaments of the mesh. The surface tension of these filaments causes the droplets to adhere and coalesce into larger droplets, which eventually flow down the mesh and are discharged due to gravity. This process effectively captures and removes water vapor from the gas, ensuring that the discharged hydrogen gas is purer.

[0037] Furthermore, in order to meet the liquid capture requirements under different power levels during the variable load hydrogen production process, due to the fluctuation of hydrogen production power, the flow rate of the mixed gas is inconsistent under different power loads. Under low load, the flow rate is low, and the required diameter of the mist capture wire mesh is small; under high load, the required diameter of the mist capture wire mesh is large; when operating under variable load, the required diameter of the mist capture wire mesh changes with the flow rate. Therefore, the mist-catching wire mesh 2 includes three droplet-catching sections: a first annular section 21, a second annular section 22, and a third annular section 23. These three sections are designed for gas-liquid separation of mixed gases at different power levels. The inner width of the first annular section 21 is greater than that of the third annular section 23. The inner width of the second annular section 22 gradually decreases from the first annular section 21 to the third annular section 23, giving the second annular section 22 a tapered structure. The second annular section 22 has a first opening 221 at its upper end and a second opening 222 at its lower end. The diameter of the first opening 221 is equal to the diameter of the first annular section 21, and the diameter of the second opening 222 is equal to the diameter of the third annular section 23. The first annular section 21 is designed for processing mixed gases at 100% hydrogen production power, the second annular section 22 is designed for processing mixed gases at 30% to 100% hydrogen production power, and the third annular section 23 is designed for processing mixed gases at 30% hydrogen production power.

[0038] Understandably, the working principle of the mist-catching wire mesh 2 is based on the inertia of droplets. When gas carrying droplets passes through the mesh, the droplets deviate from the airflow direction due to inertia, colliding with the fine filaments of the mesh and adhering to its surface. As the droplets continuously coalesce, they gradually increase in size and eventually drip off. Variations in gas flow rate under different loads result in different droplet inertia, thus requiring mist-catching wire mesh 2 with different diameters to adapt. The cross-sectional area of ​​the droplet trap is proportional to the gas flow rate, reflecting that under different loads, in order to effectively capture droplets, the diameter of the mist-catching wire mesh 2 needs to be adjusted according to the gas flow rate. For example, when the gas flow rate is low, a smaller diameter mist-catching wire mesh 2 should be selected; when the gas flow rate is high, a larger diameter mist-catching wire mesh 2 should be selected. To adapt to power fluctuations in the flexible water electrolysis hydrogen production process, annular mesh segments of different diameters were designed to ensure efficient gas-liquid separation under different loads.

[0039] In several embodiments provided in this application, a swirling structure 3 is provided at the gas inlet 6 of the mixed gas, so that the swirling structure 3 and the inner peripheral wall of the tube form a centrifugal channel 1b. When the mixed gas of hydrogen and water vapor enters the centrifugal channel 1b, the hydrogen and water vapor will separate due to the action of centrifugal force, thereby making the separation more thorough. Specifically, the separation device 100 includes a tank, a mist-catching mesh 2, and a vortex structure 3. The upper part of the tank is provided with an exhaust port 4 for hydrogen output, and the lower part of the tank is provided with a drain port 5 for water vapor output. The air inlet 6 intakes from one side of the tank. When the mixed gas enters the tank, it first passes through the centrifugal channel 1b formed by the vortex structure 3. Due to the different masses of hydrogen and water vapor, under the action of centrifugal force, the heavier water vapor is thrown to the outer wall of the centrifugal channel 1b, while the lighter hydrogen is concentrated in the central area of ​​the centrifugal channel 1b, thereby achieving separation of the two. The separated hydrogen and water vapor rise simultaneously. The mist-catching mesh 2 has three annular mesh segments with different inner cavity widths, which can adapt to the gas-liquid separation of hydrogen production under different power levels. It is more reliable for capturing water vapor during variable load processes. The separated hydrogen is output through the exhaust port 4, and the captured water vapor is liquefied and discharged through the drain port 5 at the bottom of the tank. The entire separation process first involves centrifugal separation via the cyclone structure 3, followed by adsorption separation via the mist-catching wire mesh 2. This dual separation process ensures a more thorough separation of hydrogen and water vapor, thereby improving the purity of the output hydrogen.

[0040] In one embodiment of this application, the tank 1 is cylindrical in shape, mainly comprising an upper part and a lower part, and is composed of two connected cylindrical tanks. The tank 1 includes a first tank 11, a second tank 13, and a transition tank 12. For details, please refer to further reading. Figure 1 The inner diameter of the first tank 11 is larger than the inner diameter of the second tank 13. The first tank 11 and the second tank 13 are connected by a transition tank 12. A first annular mesh segment 21 is disposed on the inner peripheral wall of the first tank 11; a second annular mesh segment 22 is disposed on the inner peripheral wall of the transition tank 12; and a third annular mesh segment 23 is disposed on the inner peripheral wall of the second tank 13. Annular grooves are provided inside the first tank 11, the second tank 13, and the transition tank 12. The first annular mesh segment 21, the second annular mesh segment 22, and the third annular mesh segment 23 are fixed to the inner peripheral wall of the tanks through these annular grooves.

[0041] Due to power fluctuations during flexible water electrolysis for hydrogen production, a transition phase between 30% and 100% load occurs as the hydrogen production power increases from 30% to 100% or decreases from 100% to 30%. As the hydrogen production power gradually changes, the flow rate of the mixed gas also changes. Therefore, the inner diameter of the transition tank 12 gradually increases or decreases, and the inner diameter of the second annular pipe section installed on the inner circumferential wall of the transition tank 12 also changes accordingly to accommodate the changing gas flow rate. For example, as the hydrogen production power increases from 30% to 100%, the flow rate of the mixed gas gradually increases, and the inner width of the second annular mesh section 22 gradually increases to accommodate the gradually increasing flow rate of the mixed gas.

[0042] The transition tank 12 serves as a transition structure between the first tank 11 and the second tank 13, connecting two tanks with unequal inner diameters. Its cross-section can be a straight inclined plane or an arc-shaped surface curving outwards; this application does not impose any limitations on this. In one embodiment of this application, the transition tank 12 has an arc-shaped structure and curves outwards, which can more smoothly guide the airflow from the first tank 11 with a larger inner diameter to the second tank 13 with a smaller inner diameter. This design helps reduce turbulence and pressure loss at the tank connection, thereby improving the airflow efficiency of the entire system. Simultaneously, the arc-shaped structure increases the structural strength of the tank, enabling it to better withstand internal pressure and ensuring the stability and safety of the system. Furthermore, the arc-shaped transition tank 12 can optimize the spatial layout, making the entire device more compact and facilitating installation and maintenance.

[0043] In one embodiment of this application, the three annular segments of the mist-catching wire mesh 2 are all woven from multiple stainless steel wires, with each wire having a diameter of 0.1mm to 0.3mm. Stainless steel is corrosion-resistant, able to withstand the erosion of various chemical media, ensuring long-term stable operation of the equipment in harsh working environments and extending its service life. Secondly, stainless steel has high strength and good mechanical properties, capable of withstanding high working pressure and mechanical stress, ensuring the structural stability of the mist-catching wire mesh 2 under high load conditions. Furthermore, the smooth surface of stainless steel makes it difficult for impurities to adhere, contributing to improved gas-liquid separation efficiency and cleanliness. The preferred diameter of the stainless steel wire is 0.28mm, providing sufficient mechanical strength and corrosion resistance. The smaller wire diameter increases the specific surface area of ​​the mesh, helping to more effectively capture and coalesce droplets, further enhancing the separation effect. The porosity of the mesh is above 97%, which significantly reduces airflow resistance, decreases system pressure drop, and improves gas-liquid separation efficiency.

[0044] This scheme also employs centrifugal separation to separate water vapor and hydrogen. The working principle of centrifugal channel 1b is based on centrifugal force. When the mixture of hydrogen and water vapor enters centrifugal channel 1b through inlet 6, due to the channel's special design, the gas is forced to rotate along the inner wall of the channel. During this rotation, heavier water droplets are thrown towards the outer wall of the channel under centrifugal force, while lighter hydrogen gas concentrates in the central area of ​​the channel. As the water droplets accumulate and gradually increase in size on the channel wall, they eventually flow down the channel wall and are discharged through outlet 5, while pure hydrogen gas rises from the central area of ​​the channel and is discharged through exhaust outlet 4. This design effectively improves the efficiency of gas-water separation, especially achieving good separation results for smaller water mist particles.

[0045] It should be noted that the centrifugal channel 1b can be a C-shaped channel or a multi-layered spiral channel; this application does not limit this. In one embodiment of this application, the swirling structure 3 is a spiral structure, and the centrifugal channel 1b is formed by the swirling structure 3 and the inner circumferential wall of the tube. Due to its unique structural design, the spiral channel can guide the mixed gas to rotate upward or downward along the spiral path. This rotational motion generates a strong centrifugal force within the channel, causing heavier water droplets to be more effectively thrown towards the outer wall of the channel under the action of centrifugal force, while lighter hydrogen gas concentrates in the central area of ​​the channel. Because the spiral channel has a long and continuous path, the mixed gas rotates within the channel for a longer time, and the centrifugal force is more fully utilized, thereby achieving more efficient gas-water separation. In addition, the spiral channel design can also increase the contact area between the gas and the channel wall, further promoting the coagulation and separation of water droplets and improving the separation effect.

[0046] In one embodiment of this application, the swirling structure 3 is formed with a spiral groove 3a, which, together with the inner peripheral wall of the tank, forms a centrifugal channel 1b. For more details, please refer to the following documentation. Figure 2The opening of the spiral groove 3a faces the inner circumferential wall of the tank. It should be noted that the spiral groove 3a can have one or more turns; this application does not limit this. In one embodiment of this application, the spiral groove 3a rotates one turn. The number of rotations of the spiral groove 3a is closely related to the initial velocity and pressure of the mixed gas entering the centrifugal channel 1b. When the pressure and initial velocity of the mixed gas are high, the gas has sufficient kinetic energy to pass through more turns of the spiral groove 3a, completing a more thorough centrifugal separation process. Conversely, when the pressure and initial velocity are low, the gas may not be able to pass smoothly through multiple turns of the spiral groove 3a, or may even stagnate in the channel and fail to exit from the centrifugal outlet 3c. Therefore, the number of turns of the spiral groove 3a should be reduced. Thus, the number of rotations of the spiral groove 3a needs to be rationally designed according to the actual gas pressure and initial velocity to ensure that the gas can pass smoothly and exit from the centrifugal outlet 3c, achieving effective gas-water separation. Furthermore, this application does not limit the pitch of the spiral groove 3a, and it can be adaptively adjusted according to parameters such as the inlet pressure and initial velocity of the mixed gas.

[0047] Furthermore, the spiral groove 3a can spiral upwards or downwards in a direction perpendicular to the placement plane of the tank. This application does not limit this. In one embodiment of this application, the centrifugal channel 1b has a centrifugal inlet 3b and a centrifugal outlet 3c. The centrifugal inlet 3b is connected to the air inlet 6, and the centrifugal outlet 3c is located below the centrifugal inlet 3b, that is, the vortex structure 3 is arranged in a downward spiral. For details, please refer to further reading. Figure 2 The mixed gas enters through the higher inlet 6, rotates downwards along the spiral groove 3a, and exits through the lower centrifugal outlet 3c. Due to the lower outlet position, hydrogen and water vapor need to rise after exiting to reach the exhaust port 4. This rising process significantly prolongs the gas flow path and increases the residence time of the gas within the tank. This provides the mist-catching mesh 2 with more time and opportunity to fully capture droplets in the mixed gas, thus achieving more efficient gas-water separation. This design not only improves separation efficiency but also optimizes the performance of the entire separation device 100.

[0048] In one embodiment of this application, the vortex structure 3 includes two spaced-apart horizontal plates 31 and a vertical plate 32 connecting the two horizontal plates 31. For details, please refer to further details. Figure 2 Two horizontal plates 31 are welded to the inner circumferential wall of the tank. The two horizontal plates 31, the vertical plate 32, and the inner circumferential wall of the tank enclose and form a centrifugal channel 1b. Alternatively, the swirl structure 3 can also be an arc-shaped plate, which, together with the inner circumferential wall of the tank, forms the centrifugal channel 1b. This application does not limit the specific shape of the centrifugal channel 1b.

[0049] To ensure effective rotational motion of the mixed gas entering the vortex structure 3 from the inlet, a guide pipe 61 is connected to the inlet. The guide pipe 61 guides the mixed gas into the centrifugal channel 2b. Since the inlet 6 is located on the second tank 13, which is cylindrical, the guide pipe 61 can be located outside the tank 1, tangential to the outer wall of the second tank 13; alternatively, it can be directed towards the axis of the second tank 13, and then guided tangentially into the centrifugal channel 2b via a bend pipe 612. This application does not impose any limitations on this. In one embodiment, the guide pipe 61 includes a straight pipe 611 and a bend pipe 612 connected to the straight pipe 611. The axis of the outlet end of the bend pipe 612 is tangential to the centrifugal channel 2b, allowing the mixed gas to enter tangentially from the centrifugal channel 2b. When the gas enters the channel tangentially, a rotating airflow is formed within the channel. This rotational motion causes heavier droplets to be thrown towards the outer wall of the channel under centrifugal force, while lighter gas concentrates in the central region of the channel. By using tangential air intake, a stable rotating flow field can be formed in the channel, enhancing the effect of centrifugal force and thus improving the efficiency of gas-liquid separation.

[0050] The above description is merely an exemplary embodiment of this application and does not limit the patent scope of this application. Any equivalent structural transformations made based on the technical concept of this application and the contents of the specification and drawings of this application, or direct / indirect applications in other related technical fields, are included within the patent protection scope of this application.

Claims

1. A separation device applied to hydrogen production by electrolysis of water, characterized in that, include: The tank (1) has a gas collection chamber (1a). The upper part of the tank (1) is provided with an exhaust port (4), the lower part of the tank (1) is provided with a drain port (5), and one side of the tank (1) is provided with an air inlet (6). The exhaust port (4), the drain port (5) and the air inlet (6) are connected to the gas collection chamber (1a). A mist-catching mesh (2) is disposed inside the tank (1) and close to the exhaust port (4). The mist-catching mesh (2) includes a first annular mesh segment (21), a second annular mesh segment (22), and a third annular mesh segment (23). The inner width of the first annular mesh segment (21) is greater than the inner width of the third annular mesh segment (23). The inner width of the second annular mesh segment (22) gradually decreases from the first annular mesh segment (21) to the third annular mesh segment (23). A swirling structure (3) is disposed in the gas collecting chamber (1a) and surrounds the inner peripheral wall of the tank body (1) to form a centrifugal channel (1b), which is connected to the air inlet (6).

2. The separation device of claim 1, wherein, The second ring segment (22) has a first opening (221) near the first ring segment (21) and a second opening (222) near the third ring segment (23), the diameter of the first opening (221) being equal to the inner cavity width of the first ring segment (21), and the diameter of the second opening (222) being equal to the inner cavity width of the third ring segment (23).

3. The separation device of claim 1, wherein, The first ring network segment (21), the second ring network segment (22), and the third ring network segment (23) are arranged at intervals along the first direction.

4. The separation device of any one of claims 1 to 3, wherein, The swirling structure (3) has a spiral groove (3a), which, together with the inner circumferential wall of the tank (1), forms the centrifugal channel (1b).

5. The separation device of claim 4, wherein, The centrifugal channel (1b) has a centrifugal inlet (3b) and a centrifugal outlet (3c). The centrifugal inlet (3b) is connected to the air inlet (6), and the centrifugal outlet (3c) is located below the centrifugal inlet (3b).

6. The separation device of any one of claims 1 to 3, wherein, The tank (1) includes a first tank (11), a second tank (13) and a transition tank (12). The inner diameter of the first tank (11) is larger than the inner diameter of the second tank (13). The first tank (11) and the second tank (13) are connected through the transition tank (12). The first annular mesh segment (21) is disposed on the inner peripheral wall of the first tank (11); the second annular mesh segment (22) is disposed on the inner peripheral wall of the transition tank (12); and the third annular mesh segment (23) is disposed on the inner peripheral wall of the second tank (13). The exhaust port (4) is located on the side of the first tank (11) facing away from the second tank (13), and the drain port (5) is located on the side of the second tank (13) facing away from the first tank (11).

7. The separation device of claim 6, wherein, The inner peripheral wall of the transition tank (12) is configured as an annular arc surface connecting the first tank (11) and the second tank (13).

8. The separation device of any one of claims 1 to 3, wherein, The diameter of the mist-catching wire mesh (2) is 0.1 mm to 0.3 mm, and / or, The porosity of the mist-catching wire mesh (2) is greater than or equal to 97%.

9. The separation device of claim 8, wherein, The diameter of the mist-catching wire mesh (2) is 0.28 mm.

10. The separation device of any one of claims 1 to 3, wherein, The swirling structure (3) includes two spaced horizontal plates (31) and a vertical plate (32) connecting the two horizontal plates (31). The two horizontal plates (31), the vertical plate (32) and the inner peripheral wall of the tank (1) enclose the centrifugal channel (1b). The two horizontal plates (31) are respectively welded to the tank body (1).

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