Gas-liquid separation system for producing hydrogen by electrolyzing water

Abstract

The utility model relates to the technical field of hydrogen production by electrolysis of water, in particular to a gas-liquid separation system for hydrogen production by electrolysis of water, which is characterized in that a rotary vane type gas-liquid separator is provided with a rotary vane assembly and a cylindrical assembly, and the rotary vane assembly throws alkali liquor to the inner wall of the cylindrical assembly through centrifugal action; the corrugated plate type gas-liquid separator is positioned below the rotary vane type gas-liquid separator and is provided with a corrugated plate to intercept alkali liquor; the mesh surface type gas-liquid separator is positioned below the corrugated plate type gas-liquid separator and is provided with a mesh surface assembly to intercept alkali liquor and discharge hydrogen; the rotary vane type gas-liquid separator, the corrugated plate type gas-liquid separator and the net surface type gas-liquid separator are combined into a whole, efficient gas-liquid separation of the hydrogen-alkali mixed flow with the high liquid content is completed only by means of pressure difference and self-gravity driving of the hydrogen-alkali mixed flow, and the good separation effect of alkali liquor and hydrogen is achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of hydrogen production by water electrolysis, and in particular to a gas-liquid separation system for hydrogen production by water electrolysis. Background Art

[0002] As one of the important energy sources for the country to promote clean energy, hydrogen energy plays a vital role in realizing the reform of my country's energy structure. As an important way to prepare hydrogen, it is necessary to optimize the separation process of hydrogen preparation and improve the safety of hydrogen preparation and separation. The existing hydrogen separation method is difficult to meet the needs of separating hydrogen and alkali liquid in large quantities, quickly and safely.

[0003] In the process of producing hydrogen by electrolysis of water, the hydrogen-alkali mixed flow produced in the electrolyzer often carries a certain proportion of alkaline liquid fluid. Since higher purity hydrogen is often required in the energy and industrial fields, it is necessary to separate the hydrogen-alkali mixed flow into gas and liquid.

[0004] It is difficult to ensure fast and efficient hydrogen separation by using the traditional static separation method. Gas-liquid separation technology is widely used in the fields of water electrolysis for hydrogen production and steam power. However, the gas-liquid separator in the prior art has poor separation effect on alkali liquid and hydrogen, and it is difficult to separate hydrogen from a hydrogen-alkali mixed flow with a high liquid content. Utility Model Content

[0005] Therefore, the technical problem to be solved by the utility model is to overcome the defects of the gas-liquid separator in the prior art in that the separation effect of alkali solution and hydrogen is poor and it is difficult to separate hydrogen from the hydrogen-alkali mixed flow with a high liquid content.

[0006] In order to solve the above problems, the utility model provides an improved gas-liquid separation system for producing hydrogen by electrolysis of water, comprising:

[0007] The rotary vane gas-liquid separator is provided with a rotary vane assembly and a cylindrical assembly, wherein the rotary vane assembly is suitable for throwing the alkali liquid in the hydrogen-alkali mixed flow onto the inner wall of the cylindrical assembly through centrifugal action;

[0008] A corrugated plate type gas-liquid separator is located below the rotary vane type gas-liquid separator; the corrugated plate type gas-liquid separator is provided with a plurality of corrugated plates arranged in parallel, and the corrugated plate type gas-liquid separator is suitable for receiving the hydrogen-alkali mixed flow treated by the rotary vane type gas-liquid separator, and using the corrugated plates to intercept the alkali liquid in the hydrogen-alkali mixed flow;

[0009] The mesh-type gas-liquid separator is located below the corrugated plate type gas-liquid separator; the mesh-type gas-liquid separator is provided with a mesh component, and the mesh-type gas-liquid separator is suitable for receiving the hydrogen-alkali mixed flow treated by the corrugated plate type gas-liquid separator, and using the mesh component to intercept the alkali liquid in the hydrogen-alkali mixed flow, and discharge and collect the hydrogen.

[0010] Optionally, the rotary vane gas-liquid separator comprises:

[0011] A first cylindrical member, with a first inlet at the top, the first inlet is suitable for introducing a hydrogen-alkali mixed flow; the rotary vane assembly is arranged in the first cylindrical member, the rotary vane assembly is suitable for throwing the alkali solution in the hydrogen-alkali mixed flow flowing through to the inner wall of the first cylindrical member through centrifugal action;

[0012] The second cylindrical member is arranged around the lower inner side of the first cylindrical member at intervals, and the top of the second cylindrical member is provided with a first collecting port, and the first collecting port is suitable for receiving the hydrogen-alkali mixed flow output by the first cylindrical member; an annular first liquid outlet is formed between the first cylindrical member and the second cylindrical member; the first liquid outlet is suitable for receiving the alkali solution flowing down from the inner wall of the first cylindrical member; the inner wall of the second cylindrical member is suitable for receiving the alkali solution thrown out by the rotary vane assembly;

[0013] The third cylindrical member is arranged around the lower inner side of the second cylindrical member at intervals, and the top of the third cylindrical member is provided with a second collecting port, and the second collecting port is suitable for receiving the hydrogen-alkali mixed flow output by the second cylindrical member; an annular second liquid outlet is formed between the third cylindrical member and the second cylindrical member; the second liquid outlet is suitable for receiving the alkali solution flowing down from the inner wall of the second cylindrical member; the first cylindrical member, the second cylindrical member and the third cylindrical member together constitute a cylindrical assembly;

[0014] The liquid storage structure is arranged at the lower end of the second liquid outlet, and the liquid storage structure is connected with the first liquid outlet and the second liquid outlet; the liquid storage structure is suitable for receiving the alkali solution transported by the first liquid outlet and the second liquid outlet, and discharging the alkali solution through the first liquid drainage pipe.

[0015] Optionally, a contraction section with an internal opening size gradually decreasing from top to bottom is provided at the lower portion of the first cylindrical member.

[0016] Optionally, a bumper plate is provided at the bottom outlet of the third cylindrical member.

[0017] Optionally, the corrugated plate type gas-liquid separator comprises:

[0018] A container is provided with a second inlet at the top and an outlet at the bottom of the container; the second inlet is suitable for introducing a hydrogen-alkali mixed flow treated by a rotary vane gas-liquid separator; the outlet is suitable for outputting the treated hydrogen-alkali mixed flow; a plurality of parallel arranged corrugated plates are arranged in the container, and a first hook-shaped liquid drainage groove is provided at the trough of each corrugated plate; the first hook-shaped liquid drainage groove is suitable for collecting alkali liquid accumulated at the trough; the first hook-shaped liquid drainage groove discharges the alkali liquid through a second liquid drainage pipe.

[0019] Optionally, a second hook-shaped drainage groove is provided at the extension of the last wave crest on each corrugated plate along the flow direction of the hydrogen-alkali mixed flow; the size of the second hook-shaped drainage groove is larger than that of the first hook-shaped drainage groove; and the second hook-shaped drainage groove discharges the alkali solution through a second drainage pipe.

[0020] Optionally, the mesh-type gas-liquid separator comprises:

[0021] The fourth cylindrical member has a third inlet at the top, and the third inlet is suitable for introducing the hydrogen-alkali mixed flow treated by the corrugated plate gas-liquid separator; a first mesh surface component is provided near the bottom outlet of the fourth cylindrical member;

[0022] A liquid storage cylinder is arranged around the lower outer side of the fourth cylindrical member at intervals; a second mesh assembly is arranged in the annular cavity between the liquid storage cylinder and the fourth cylindrical member; the first mesh assembly and the second mesh assembly together constitute a mesh assembly;

[0023] An outer cover is arranged around the outer side of the upper part of the liquid storage cylinder at intervals, and the top end of the outer cover extends beyond the top end of the liquid storage cylinder; the annular cavity is connected with the external cavity of the outer cover;

[0024] The mesh-type gas-liquid separator is suitable for intercepting alkali liquid in the hydrogen-alkali mixed flow through the first mesh component, and continuing to intercept alkali liquid in the hydrogen-alkali mixed flow after intercepting alkali liquid once through the second mesh component; the separated hydrogen gas rises through the external cavity of the outer cover and is discharged and collected through the gas drainage pipe; the alkali liquid intercepted by the first mesh component and the second mesh component falls to the bottom of the liquid storage cylinder and is discharged through the third gas drainage pipe.

[0025] Optionally, the first mesh surface assembly and the second mesh surface assembly are located at the same horizontal height.

[0026] Optionally, the rotary vane assembly includes: a central column coaxially arranged with the cylindrical assembly and rotary vanes arranged around the outer circumference of the central column, and the top end of the central column is in the shape of a bullet head.

[0027] Optionally, the mesh surface assembly has no less than five mesh surface layers, and the spacing between adjacent mesh surfaces does not exceed 10 mm.

[0028] The above technical solution of the utility model has the following advantages compared with the prior art:

[0029] 1. The gas-liquid separation system for producing hydrogen by electrolysis of water provided by the utility model comprises: a rotary vane gas-liquid separator, provided with a rotary vane assembly and a cylindrical assembly, wherein the rotary vane assembly is suitable for throwing the alkali liquid in the hydrogen-alkali mixed flow onto the inner wall of the cylindrical assembly through centrifugal action; a corrugated plate gas-liquid separator, located below the rotary vane gas-liquid separator; the corrugated plate gas-liquid separator is provided with a plurality of corrugated plates arranged in parallel, the corrugated plate gas-liquid separator is suitable for receiving the hydrogen-alkali mixed flow treated by the rotary vane gas-liquid separator, and using the corrugated plates to intercept the alkali liquid in the hydrogen-alkali mixed flow; a mesh surface gas-liquid separator, located below the corrugated plate gas-liquid separator; the mesh surface gas-liquid separator is provided with a mesh surface assembly, the mesh surface type The gas-liquid separator is suitable for receiving the hydrogen-alkali mixed flow treated by the corrugated plate gas-liquid separator, and using the mesh component to intercept the alkali liquid in the hydrogen-alkali mixed flow, and discharge and collect the hydrogen; the present application adopts the above-mentioned technical scheme, and combines the rotary blade gas-liquid separator, the corrugated plate gas-liquid separator and the mesh gas-liquid separator into an integral three-stage gas-liquid separation system, which only relies on the pressure difference of the hydrogen-alkali mixed flow and its own gravity drive throughout the process to complete the efficient gas-liquid separation of the hydrogen-alkali mixed flow with a high liquid content, and achieve a good separation effect of alkali liquid and hydrogen. In theory, it can separate hydrogen from the hydrogen-alkali mixed flow generated by the water electrolysis hydrogen production system without external assistance, thereby further improving the safety of the hydrogen separation process.

[0030] 2. The rotary vane gas-liquid separator of the utility model comprises: a first cylindrical member, a first inlet is provided on the top, and the first inlet is suitable for introducing a hydrogen-alkali mixed flow; the rotary vane assembly is arranged in the first cylindrical member, and the rotary vane assembly is suitable for throwing the alkali liquid in the hydrogen-alkali mixed flow flowing through to the inner wall of the first cylindrical member through centrifugal action; a second cylindrical member, which is arranged around the inner side of the lower part of the first cylindrical member at intervals, and a first collecting port is provided on the top of the second cylindrical member, and the first collecting port is suitable for receiving the hydrogen-alkali mixed flow output by the first cylindrical member; a first annular liquid outlet is formed between the first cylindrical member and the second cylindrical member; the first liquid outlet is suitable for receiving the alkali liquid flowing down from the inner wall of the first cylindrical member; the inner wall of the second cylindrical member is suitable for receiving the alkali liquid thrown out by the rotary vane assembly; a third cylindrical member, which is arranged around the inner side of the lower part of the second cylindrical member at intervals, and a second collecting port is provided on the top of the third cylindrical member, and the second The collecting port is suitable for receiving the hydrogen-alkali mixed flow output by the second cylindrical member; a ring-shaped second liquid outlet is formed between the third cylindrical member and the second cylindrical member; the second liquid outlet is suitable for receiving the alkali solution flowing down from the inner wall of the second cylindrical member; the first cylindrical member, the second cylindrical member and the third cylindrical member together constitute a cylindrical assembly; the liquid storage structure is arranged at the lower end of the second liquid outlet, and the liquid storage structure is connected with the first liquid outlet and the second liquid outlet; the liquid storage structure is suitable for receiving the alkali solution transported by the first liquid outlet and the second liquid outlet, and discharging the alkali solution through the first drain pipe; the present application adopts the above-mentioned technical scheme, by setting the first collecting port and the second collecting port, the incoming hydrogen-alkali mixed flow is better collected; by setting the first liquid outlet and the second liquid outlet, it is prevented that when the amount of alkali solution is large, the alkali solution is prevented from being attached to the inner wall surface in large quantities and being difficult to be discharged in time, resulting in reduced separation efficiency, effectively reducing the amount of alkali solution and improving the gas-liquid separation effect.

[0031] 3. The utility model provides a contraction section at the lower part of the first cylindrical member, with the internal opening size gradually decreasing from top to bottom; the application adopts the above technical scheme, which not only improves the adhesion rate of the separated alkali solution on the inner wall of the contraction section and increases the alkali solution separation amount, but also gathers the hydrogen-alkali mixed flow for easy transportation to the second cylindrical member, thereby improving the gas-liquid separation efficiency.

[0032] 4. The corrugated plate type gas-liquid separator of the utility model comprises: a container, a second inlet is provided at the top, and an outlet is provided at the bottom of the container; the second inlet is suitable for introducing the hydrogen-alkali mixed flow treated by the rotary vane gas-liquid separator; the outlet is suitable for outputting the treated hydrogen-alkali mixed flow; a plurality of parallel arranged corrugated plates are arranged in the container, and a first hook-shaped liquid drainage groove is provided at the trough of each corrugated plate; the first hook-shaped liquid drainage groove is suitable for collecting the alkali liquid accumulated at the trough; the first hook-shaped liquid drainage groove discharges the alkali liquid through the second liquid drainage pipe; the present application adopts the above technical scheme to prevent the alkali liquid droplets from adhering to and accumulating in large quantities at the trough when the hydrogen-alkali mixed flow containing a large amount of alkali liquid flows through the trough, resulting in a decrease in the separation efficiency of the corrugated plate type gas-liquid separator. In addition, compared with the corrugated plate type gas-liquid separator without the first hook-shaped liquid drainage groove, the corrugated plate type gas-liquid separator of the present application is equipped with a first hook-shaped liquid drainage groove, which improves the interception amount and retention efficiency of the alkali liquid when the hydrogen-alkali mixed flow flows through the corrugated plate, thereby further improving the overall gas-liquid separation efficiency of the gas-liquid separation system used for electrolysis of water to produce hydrogen.

[0033] 5. The utility model is provided with a second hook-shaped drainage groove at the extension of the last wave crest on each corrugated plate along the flow direction of the hydrogen-alkali mixed flow; the size of the second hook-shaped drainage groove is larger than the size of the first hook-shaped drainage groove; the second hook-shaped drainage groove discharges the alkali liquid through the second drainage pipe; the present application adopts the above technical scheme, and collects the alkali liquid that is not separated and discharged by the first hook-shaped drainage groove through the second hook-shaped drainage groove, thereby improving the gas-liquid separation efficiency. In addition, compared with the corrugated plate type gas-liquid separator without the second hook-shaped drainage groove, the corrugated plate type gas-liquid separator provided with the second hook-shaped drainage groove in the present application improves the interception amount and retention efficiency of the alkali liquid when the hydrogen-alkali mixed flow flows through the corrugated plate, thereby further improving the overall gas-liquid separation efficiency of the gas-liquid separation system for hydrogen production by electrolysis of water.

[0034] 6. The mesh-type gas-liquid separator of the utility model comprises: a fourth cylindrical member, a third inlet is provided on the top, and the third inlet is suitable for introducing the hydrogen-alkali mixed flow treated by the corrugated plate gas-liquid separator; a first mesh assembly is provided at the fourth cylindrical member near the bottom outlet; a liquid storage cylinder is arranged around the lower outer side of the fourth cylindrical member at intervals; a second mesh assembly is provided in the annular cavity between the liquid storage cylinder and the fourth cylindrical member; the first mesh assembly and the second mesh assembly together constitute a mesh assembly; an outer cover member is arranged around the upper outer side of the liquid storage cylinder at intervals, and the top end of the outer cover member extends beyond the top end of the liquid storage cylinder; The annular cavity is connected to the external cavity of the outer cover; the mesh-type gas-liquid separator is suitable for intercepting alkali liquid in the hydrogen-alkali mixed flow through the first mesh component, and continuing to intercept alkali liquid in the hydrogen-alkali mixed flow after intercepting alkali liquid once through the second mesh component; the separated hydrogen rises through the external cavity of the outer cover and is discharged and collected through the gas drainage pipe; the alkali liquid intercepted by the first mesh component and the second mesh component falls to the bottom of the liquid storage cylinder and is discharged through the third gas drainage pipe; the present application adopts the above-mentioned technical solution, and performs multiple separations through the first mesh component and the second mesh component, and can still maintain extremely high separation efficiency when facing a hydrogen-alkali mixed flow with a high alkali liquid content. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] In order to more clearly illustrate the specific implementation methods of the utility model or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0036] Figure 1 This is a schematic diagram of the structure of a gas-liquid separation system for producing hydrogen by electrolysis of water provided in an embodiment of the utility model;

[0037] Figure 2 It is a structural schematic diagram of a rotary vane gas-liquid separator provided in an embodiment of the utility model;

[0038] Figure 3 This is a schematic diagram of the structure of a corrugated plate type gas-liquid separator provided in an embodiment of the utility model;

[0039] Figure 4 It is a schematic structural diagram of the mesh type gas-liquid separator provided in an embodiment of the utility model.

[0040] Description of reference numerals:

[0041] 1. Rotary vane gas-liquid separator; 2. Corrugated plate gas-liquid separator; 3. Mesh surface gas-liquid separator; 4. First cylindrical member; 5. Second cylindrical member; 6. Third cylindrical member; 7. Rotary vane assembly; 8. First inlet; 9. Contraction section; 10. First liquid outlet; 11. First collecting port; 12. Second collecting port; 13. Second liquid outlet; 14. Liquid storage structure; 15. First drainage pipe; 16. Anti-collision plate; 17. Container; 18. Corrugated plate; 19. First hook-shaped drainage groove; 20. Outlet; 21. Second hook-shaped drainage groove; 22. Second inlet; 23. Second drainage pipe; 24. Fourth cylindrical member; 25. Liquid storage cylinder; 26. Cover member; 27. Third inlet; 28. First mesh surface assembly; 29. ​​Second mesh surface assembly; 30. Air drainage pipe; 31. Third drainage pipe. DETAILED DESCRIPTION

[0042] The technical solution of the utility model will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0043] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention 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 limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0044] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" 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 a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0045] In addition, the technical features involved in the different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0046] like Figures 1 to 4A specific embodiment of the gas-liquid separation system for producing hydrogen by electrolysis of water is shown, comprising: a rotary vane gas-liquid separator 1, a corrugated plate gas-liquid separator 2 and a mesh surface gas-liquid separator 3.

[0047] like Figures 1 to 4 As shown, the rotary vane gas-liquid separator 1 is provided with a rotary vane assembly 7 and a cylindrical assembly, and the center line of the rotary vane assembly 7 and the center line of the cylindrical assembly are located on the same vertical axis. The rotary vane assembly 7 is suitable for throwing the alkali liquid in the hydrogen-alkali mixed flow onto the inner wall of the cylindrical assembly through centrifugal action. The corrugated plate type gas-liquid separator 2 is located below the rotary vane type gas-liquid separator 1; the corrugated plate type gas-liquid separator 2 is provided with a plurality of corrugated plates 18 arranged in parallel, and the corrugated plate type gas-liquid separator 2 is suitable for receiving the hydrogen-alkali mixed flow treated by the rotary vane type gas-liquid separator 1, and using the corrugated plates 18 to intercept the alkali liquid in the hydrogen-alkali mixed flow. The mesh surface type gas-liquid separator 3 is located below the corrugated plate type gas-liquid separator 2; the mesh surface type gas-liquid separator 3 is provided with a mesh surface assembly, and the mesh surface type gas-liquid separator 3 is suitable for receiving the hydrogen-alkali mixed flow treated by the corrugated plate type gas-liquid separator 2, and using the mesh surface assembly to intercept the alkali liquid in the hydrogen-alkali mixed flow, and discharge and collect the hydrogen. Among them, Figure 1 The thick arrow at the upper part indicates the flow direction of the hydrogen-alkali mixed flow, the thick arrow at the lower left part indicates the flow direction of the hydrogen gas, and the thin arrow at the right part indicates the flow direction of the alkali solution.

[0048] like Figure 2 As shown, the rotary vane gas-liquid separator 1 includes: a first cylindrical member 4 , a second cylindrical member 5 , a third cylindrical member 6 and a liquid storage structure 14 .

[0049] The top of the first cylindrical member 4 is provided with a first inlet 8, which is suitable for introducing a hydrogen-alkali mixed flow; the rotary vane assembly 7 is arranged in the first cylindrical member 4, and the rotary vane assembly 7 is suitable for throwing the alkali liquid in the hydrogen-alkali mixed flow flowing through to the inner wall of the first cylindrical member 4 through centrifugal action. The second cylindrical member 5 is arranged around the inner side of the lower part of the first cylindrical member 4 at intervals, and the top of the second cylindrical member 5 is provided with a first collecting port 11, which is suitable for receiving the hydrogen-alkali mixed flow output by the first cylindrical member 4; an annular first liquid outlet 10 is formed between the first cylindrical member 4 and the second cylindrical member 5; the first liquid outlet 10 is suitable for receiving the alkali liquid flowing down from the inner wall of the first cylindrical member 4; the inner wall of the second cylindrical member 5 is suitable for receiving the alkali liquid thrown out by the rotary vane assembly 7. The third cylindrical member 6 is arranged around the lower inner side of the second cylindrical member 5 at intervals, and a second collecting port 12 is provided at the top of the third cylindrical member 6, and the second collecting port 12 is suitable for receiving the hydrogen-alkali mixed flow output by the second cylindrical member 5; an annular second liquid outlet 13 is formed between the third cylindrical member 6 and the second cylindrical member 5; the second liquid outlet 13 is suitable for receiving the alkali solution flowing down from the inner wall of the second cylindrical member 5; the first cylindrical member 4, the second cylindrical member 5 and the third cylindrical member 6 together constitute a cylindrical assembly. The liquid storage structure 14 is arranged at the lower end of the second liquid outlet 13, and the liquid storage structure 14 is connected with the first liquid outlet 10 and the second liquid outlet 13; the liquid storage structure 14 is suitable for receiving the alkali solution transported by the first liquid outlet 10 and the second liquid outlet 13, and discharging the alkali solution through the first liquid drainage pipe 15.

[0050] Furthermore, a contraction section 9 whose internal opening size gradually decreases from top to bottom is provided at the lower part of the first cylindrical member 4. An anti-collision plate 16 is provided at the bottom outlet of the third cylindrical member 6.

[0051] Specifically, the rotary vane assembly 7 includes: a central column coaxially arranged with the cylindrical assembly and rotary vanes arranged around the outer periphery of the central column, and the top of the central column is in the shape of a bullet head. The rotary vanes are rotated by the impact of the hydrogen-alkali mixed flow, thereby obtaining centrifugal force.

[0052] For the rotary vane gas-liquid separator 1, after the hydrogen-alkali mixed flow passes through the rotary vane, the centrifugal force causes the alkali liquid droplets to adhere to the inner side of the first cylindrical member 4, and the alkali liquid droplets flow out through the first liquid outlet 10 under the action of gravity and centrifugal force, thereby realizing the primary separation of the hydrogen-alkali mixed flow. After the hydrogen-alkali mixed flow that has undergone the primary separation enters the second cylindrical member 5, the residual centrifugal force causes the alkali liquid droplets to adhere to the inner wall of the second cylindrical member 5, and the alkali liquid droplets flow out through the second liquid outlet 13 under the action of gravity and centrifugal force, thereby realizing the secondary separation of the hydrogen-alkali mixed flow. The rotary vane gas-liquid separator 1 adopts a two-time separation method, and when facing a hydrogen-alkali mixed flow containing a large amount of alkali liquid, it can effectively reduce the alkali liquid content in the hydrogen-alkali mixed flow and improve the gas-liquid separation effect.

[0053] like Figure 3 As shown, the corrugated plate type gas-liquid separator 2 includes: a container 17.

[0054] A second inlet 22 is provided at the top of the container 17, and an outlet 20 is provided at the bottom of the container 17; the second inlet 22 is suitable for introducing the hydrogen-alkali mixed flow treated by the rotary vane gas-liquid separator 1; the outlet 20 is suitable for outputting the treated hydrogen-alkali mixed flow; a plurality of parallel arranged corrugated plates 18 are arranged in the container 17; the profile of the corrugated plates 18 is a streamline wave type, which effectively reduces the resistance when the fluid flows through and reduces the speed loss when the fluid flows through. A hydrogen-alkali mixed flow channel is formed between every two corrugated plates 18, and the corrugated plates 18 have staggered troughs and crests. A first hook-shaped liquid-draining groove 19 is provided at the trough of each corrugated plate 18; the first hook-shaped liquid-draining groove 19 is suitable for collecting the alkali liquid accumulated at the trough; the first hook-shaped liquid-draining groove 19 discharges the alkali liquid through the second liquid-draining pipe 23. Since the hydrogen-alkali mixed flow contains a large amount of alkali liquid, the alkali liquid droplets are easily accumulated in the troughs of the corrugated plate 18 to form a liquid film, and the gas-liquid separation efficiency decreases; a first hook-shaped liquid drainage groove 19 is provided at the troughs of the corrugated plate 18 through which the hydrogen-alkali mixed flow flows, so that the alkali liquid droplets accumulated in the troughs can be discharged from the troughs in time, thereby improving the gas-liquid separation efficiency compared to the case where the first hook-shaped liquid drainage groove 19 is not provided.

[0055] Furthermore, a second hook-shaped drain groove 21 is provided at the extension of the last wave crest on each corrugated plate 18 along the flow direction of the hydrogen-alkali mixed flow; the size of the second hook-shaped drain groove 21 is larger than the size of the first hook-shaped drain groove 19; the second hook-shaped drain groove 21 discharges the alkali solution through the second drain pipe 23. The angle of the first hook-shaped drain groove 19 and the second hook-shaped drain groove 21 is in the range of 45° to 75°, and both too large and too small angles will affect the gas-liquid separation efficiency.

[0056] For the corrugated plate type gas-liquid separator 2, the hydrogen-alkali mixed flow enters from the second inlet 22 above, flows through the flow channel formed by the corrugated plates 18, and the alkali liquid droplets adhere to the wall surface of the flow channel formed by the corrugated plates 18. Under the action of gravity and inertia, part of the alkali liquid droplets are discharged through the first hook-shaped liquid-repelling groove 19 at the trough, and the other part of the alkali liquid is intercepted and discharged by the second hook-shaped liquid-repelling groove 21. After the discharged alkali liquid is collected, it is discharged from the second liquid-repelling pipe 23.

[0057] When manufacturing the corrugated plate type gas-liquid separator 2, the arrangement spacing of each corrugated plate 18 should be moderate, and too large a spacing will affect the gas-liquid separation efficiency. The size of the first hook-shaped hydrophobic groove 19 and the second hook-shaped hydrophobic groove 21 is adapted to the size of the corrugated plate 18. Both too large and too small hydrophobic grooves will affect the gas-liquid separation efficiency.

[0058] Through the corrugated plate type gas-liquid separator 2, the hydrogen-alkali mixed flow passing through can complete the gas-liquid separation process only by gravity and inertia without relying on external force. When facing the hydrogen-alkali mixed flow containing a large amount of alkali liquid, the first hook-shaped liquid-repelling groove 19 can timely discharge the alkali liquid droplets accumulated at the trough to avoid the formation of liquid film and the decrease of gas-liquid separation efficiency. The second hook-shaped liquid-repelling groove 21 intercepts the alkali liquid that is not successfully collected and separated when flowing through the corrugated plate 18, thereby further improving the gas-liquid separation efficiency.

[0059] like Figure 4 As shown, the mesh-type gas-liquid separator 3 includes: a fourth cylindrical member 24 , a liquid storage cylinder 25 and an outer cover member 26 .

[0060] The top of the fourth cylindrical member 24 is provided with a third inlet 27, and the third inlet 27 is suitable for introducing the hydrogen-alkali mixed flow treated by the corrugated plate gas-liquid separator 2; a first mesh assembly 28 is provided near the bottom outlet of the fourth cylindrical member 24. The liquid storage cylinder 25 is arranged around the lower outer side of the fourth cylindrical member 24 at intervals; a second mesh assembly 29 is provided in the annular cavity between the liquid storage cylinder 25 and the fourth cylindrical member 24; the first mesh assembly 28 and the second mesh assembly 29 together constitute a mesh assembly. The outer cover member 26 is arranged around the upper outer side of the liquid storage cylinder 25 at intervals, and the top end of the outer cover member 26 extends beyond the top end of the liquid storage cylinder 25; the annular cavity is connected to the external cavity of the outer cover member 26. The mesh-type gas-liquid separator 3 is suitable for intercepting alkali liquid in the hydrogen-alkali mixed flow through the first mesh assembly 28, and passing the hydrogen-alkali mixed flow after intercepting alkali liquid once through the second mesh assembly 29 to continue intercepting alkali liquid; the separated hydrogen gas rises through the external cavity of the outer cover 26, and is discharged and collected through the gas drainage pipe 30; the alkali liquid intercepted by the first mesh assembly 28 and the second mesh assembly 29 falls to the bottom of the liquid storage cylinder 25 and is discharged through the third gas drainage pipe 31. When the diameter of the alkali liquid droplet is larger than the gap between the wire meshes of the mesh assembly, it cannot pass through the wire mesh and is thus intercepted; for alkali liquid droplets with small diameters, since the alkali liquid has a certain viscosity, the droplets have an irregular shape at high speed, and when passing through the gap formed by the wire mesh, a "bridging" phenomenon will occur, thereby being intercepted by the wire mesh. The intercepted alkali liquid droplets fall into the liquid storage cylinder 25 under the action of gravity and inertia.

[0061] Specifically, the first mesh surface assembly 28 and the second mesh surface assembly 29 are located at the same horizontal height. The mesh surface assembly has at least five mesh surface layers, and the spacing between adjacent mesh surfaces does not exceed 10 mm.

[0062] Obviously, the above embodiments are merely examples for the purpose of clear explanation, and are not intended to limit the implementation methods. For those skilled in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the implementation methods here. The obvious changes or modifications derived from these are still within the scope of protection of the invention of the utility model.

Claims

1. A gas-liquid separation system for producing hydrogen by electrolysis of water, characterized in that: include: A rotary vane gas-liquid separator (1) is provided with a rotary vane assembly (7) and a cylindrical assembly, wherein the rotary vane assembly (7) is suitable for throwing the alkali liquid in the hydrogen-alkali mixed flow onto the inner wall of the cylindrical assembly through centrifugal action; A corrugated plate type gas-liquid separator (2) is located below the rotary vane type gas-liquid separator (1); the corrugated plate type gas-liquid separator (2) is provided with a plurality of corrugated plates (18) arranged in parallel, the corrugated plate type gas-liquid separator (2) is suitable for receiving the hydrogen-alkali mixed flow treated by the rotary vane type gas-liquid separator (1), and using the corrugated plates (18) to intercept the alkali liquid in the hydrogen-alkali mixed flow; The mesh-surface gas-liquid separator (3) is located below the corrugated plate-type gas-liquid separator (2); the mesh-surface gas-liquid separator (3) is provided with a mesh surface component, and the mesh-surface gas-liquid separator (3) is suitable for receiving the hydrogen-alkali mixed flow treated by the corrugated plate-type gas-liquid separator (2), and using the mesh surface component to intercept the alkali liquid in the hydrogen-alkali mixed flow, and discharge and collect the hydrogen.

2. The gas-liquid separation system for producing hydrogen by electrolysis of water according to claim 1, characterized in that: The rotary vane gas-liquid separator (1) comprises: The first cylindrical member (4) is provided with a first inlet (8) at the top, and the first inlet (8) is suitable for introducing a hydrogen-alkali mixed flow; the rotary vane assembly (7) is arranged in the first cylindrical member (4), and the rotary vane assembly (7) is suitable for throwing the alkali liquid in the hydrogen-alkali mixed flow flowing through onto the inner wall of the first cylindrical member (4) through centrifugal action; A second cylindrical member (5) is arranged around the lower inner side of the first cylindrical member (4) at intervals, and a first collecting port (11) is provided at the top of the second cylindrical member (5), and the first collecting port (11) is suitable for receiving the hydrogen-alkali mixed flow output by the first cylindrical member (4); an annular first liquid outlet (10) is formed between the first cylindrical member (4) and the second cylindrical member (5); the first liquid outlet (10) is suitable for receiving the alkali liquid flowing down from the inner wall of the first cylindrical member (4); and the inner wall of the second cylindrical member (5) is suitable for receiving the alkali liquid thrown out by the rotary vane assembly (7); The third cylindrical member (6) is arranged around the lower inner side of the second cylindrical member (5) at intervals, and the top of the third cylindrical member (6) is provided with a second collecting port (12), and the second collecting port (12) is suitable for receiving the hydrogen-alkali mixed flow output by the second cylindrical member (5); an annular second liquid outlet (13) is formed between the third cylindrical member (6) and the second cylindrical member (5); the second liquid outlet (13) is suitable for receiving the alkali liquid flowing down from the inner wall of the second cylindrical member (5); the first cylindrical member (4), the second cylindrical member (5) and the third cylindrical member (6) together constitute a cylindrical assembly; A liquid storage structure (14) is arranged at the lower end of the second liquid outlet (13), and the liquid storage structure (14) is in communication with the first liquid outlet (10) and the second liquid outlet (13); the liquid storage structure (14) is suitable for receiving the alkali liquid transported by the first liquid outlet (10) and the second liquid outlet (13), and discharging the alkali liquid through the first liquid drainage pipe (15).

3. The gas-liquid separation system for producing hydrogen by electrolysis of water according to claim 2, characterized in that: A contraction section (9) is provided at the lower portion of the first cylindrical member (4), the inner opening size of which gradually decreases from top to bottom.

4. The gas-liquid separation system for producing hydrogen by electrolysis of water according to claim 2, characterized in that: An impact plate (16) is provided at the bottom outlet of the third cylindrical member (6).

5. The gas-liquid separation system for producing hydrogen by electrolysis of water according to any one of claims 1 to 4, characterized in that: The corrugated plate type gas-liquid separator (2) comprises: A container (17) is provided with a second inlet (22) at the top and an outlet (20) at the bottom of the container (17); the second inlet (22) is suitable for introducing a hydrogen-alkali mixed flow treated by a rotary vane gas-liquid separator (1); the outlet (20) is suitable for outputting the treated hydrogen-alkali mixed flow; a plurality of parallel-arranged corrugated plates (18) are arranged in the container (17), and a first hook-shaped liquid-draining groove (19) is provided at the trough of each corrugated plate (18); the first hook-shaped liquid-draining groove (19) is suitable for collecting alkali liquid accumulated at the trough; the first hook-shaped liquid-draining groove (19) discharges the alkali liquid through a second liquid-draining pipe (23).

6. The gas-liquid separation system for producing hydrogen by electrolysis of water according to claim 5, characterized in that: A second hook-shaped drainage groove (21) is provided at the extension of the last wave crest on each corrugated plate (18) along the flow direction of the hydrogen-alkali mixed flow; the size of the second hook-shaped drainage groove (21) is larger than the size of the first hook-shaped drainage groove (19); and the second hook-shaped drainage groove (21) discharges alkali liquid through a second drainage pipe (23).

7. The gas-liquid separation system for producing hydrogen by electrolysis of water according to any one of claims 1 to 4, characterized in that: The mesh-type gas-liquid separator (3) comprises: A fourth cylindrical member (24) is provided with a third inlet (27) at the top, wherein the third inlet (27) is suitable for introducing the hydrogen-alkali mixed flow treated by the corrugated plate gas-liquid separator (2); a first mesh surface assembly (28) is provided near the bottom outlet of the fourth cylindrical member (24); The liquid storage cylinder (25) is arranged around the lower outer side of the fourth cylindrical member (24) at intervals; a second mesh assembly (29) is provided in the annular cavity between the liquid storage cylinder (25) and the fourth cylindrical member (24); the first mesh assembly (28) and the second mesh assembly (29) together constitute a mesh assembly; An outer cover (26) is disposed around and sleeved on the upper outer side of the liquid storage cylinder (25) at intervals, and the top end of the outer cover (26) extends beyond the top end of the liquid storage cylinder (25); the annular cavity is communicated with the external cavity of the outer cover (26); The mesh-type gas-liquid separator (3) is suitable for intercepting alkali liquid in the hydrogen-alkali mixed flow through the first mesh component (28), and passing the hydrogen-alkali mixed flow after the alkali liquid is intercepted once through the second mesh component (29) to continue to intercept the alkali liquid; the separated hydrogen gas rises through the external cavity of the outer cover (26) and is discharged and collected through the gas drainage pipe (30); the alkali liquid intercepted by the first mesh component (28) and the second mesh component (29) falls to the bottom of the liquid storage cylinder (25) and is discharged through the third gas drainage pipe (31).

8. The gas-liquid separation system for producing hydrogen by electrolysis of water according to claim 7, characterized in that: The first mesh surface component (28) and the second mesh surface component (29) are located at the same horizontal height.

9. The gas-liquid separation system for producing hydrogen by electrolysis of water according to any one of claims 1 to 4, characterized in that: The rotary blade assembly (7) comprises: a central column arranged coaxially with the cylindrical assembly and rotary blades arranged around the outer circumference of the central column, and the top end of the central column is in the shape of a bullet head.

10. The gas-liquid separation system for producing hydrogen by electrolysis of water according to any one of claims 1 to 4, characterized in that: The mesh surface assembly has no less than five mesh surface layers, and the spacing between adjacent mesh surfaces does not exceed 10 mm.

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