Gas-liquid separator and proton exchange membrane electrolytic cell
By incorporating nozzles, guide tubes, and blades inside the gas-liquid separator, and utilizing collision and centrifugal methods to improve separation efficiency, the problem of excessively large equipment size caused by gravity separation is solved, achieving efficient and miniaturized gas-liquid separation.
Patent Information
- Application Number
- CN202423221816.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-25
- Publication Date
- 2025-12-05
- Estimated Expiration
- 2034-12-25
AI Technical Summary
In existing technologies, gravity separation methods result in large gas-liquid separators, making it difficult to reduce the size of the equipment while ensuring efficient separation.
By installing nozzles, guide tubes, and multiple blades inside the gas-liquid separator, the separation efficiency is improved and the equipment size is reduced by increasing the collision and centrifugal effect during fluid movement.
While maintaining a separation efficiency of 99.9%, the diameter and length of the gas-liquid separator have been reduced by nearly half, and the separation time has been shortened to less than 60 seconds.
Smart Images
Figure CN223628271U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The present application relates to the field of hydrogen production by water electrolysis, in particular, to a gas-liquid separator and a proton exchange membrane electrolyzer. BACKGROUND
[0002] In the process of hydrogen production by a proton exchange membrane electrolyzer, the main function of the gas-liquid separator is to separate the mixed fluid of gas and liquid generated by the electrolyzer, for example, to separate the mixed fluid of hydrogen and water generated by the electrolyzer. In order to ensure good separation of hydrogen and water, the separation efficiency should be greater than 99%.
[0003] In the related art, the method of gravity separation is usually used. Under the action of gravity, hydrogen and water are immiscible and have different densities, and hydrogen can be separated by floating under the action of the density difference, thereby forming a certain proportion of gas phase and liquid phase.
[0004] Although the method of gravity separation in the related art can realize the separation of gas phase and liquid phase, in order to ensure good gas-liquid phase separation efficiency, the liquid phase should be ensured to have sufficient residence time in the separator. Therefore, the gas-liquid separator in the related art has a large demand for the length direction and diameter direction of the liquid phase movement, which will cause the size of the gas-liquid separator to be large. UTILITY MODEL CONTENT
[0005] The embodiments of the present application at least provide a gas-liquid separator and a proton exchange membrane electrolyzer. By arranging the internal members such as the spray pipe, the flow guide cylinder and the plurality of blades inside the gas-liquid separator body, the collision and centrifugal separation of the fluid movement are increased, thereby improving the separation efficiency of the gas-liquid phase, and further reducing the size of the gas-liquid separator on the basis of ensuring the separation efficiency.
[0006] In a first aspect, the embodiments of the present application provide a gas-liquid separator. The gas-liquid separator comprises a gas-liquid separator body. A gas-liquid mixture inlet is arranged at a position close to a first side face of the top of the gas-liquid separator body. A liquid outlet is arranged at a position close to a second side face of the bottom of the gas-liquid separator body. An exhaust port is arranged at a position close to the top of the first side face.
[0007] The gas-liquid separator body is internally provided with a spray pipe. The spray port of the spray pipe is close to the first side face.
[0008] The side of the spray pipe away from the first side face is fixedly connected with a flow guide cylinder.
[0009] The side of the flow guide cylinder away from the spray pipe is fixedly connected with a plurality of blades arranged in a ring array. The end of the plurality of blades away from the flow guide cylinder is close to the second side face.
[0010] In a possible implementation manner, the spray pipe is located below the gas-liquid mixture inlet.
[0011] In a possible implementation, the nozzle has a converging section and a diverging section connected in sequence, and the nozzle outlet of the diverging section is close to the first side.
[0012] In a possible implementation, the diverging section is located below the gas-liquid mixture inlet.
[0013] In a possible implementation, the Mach number of the converging section is less than 1, and the Mach number of the diverging section is greater than 1.
[0014] In a possible implementation, the nozzle outlet is provided with a liquid discharge hole close to the bottom end of the gas-liquid separator body.
[0015] In a possible implementation, the plurality of blades are away from the end of the flow guide cylinder above the liquid discharge hole.
[0016] In a possible implementation, the plurality of blades are conical blades or sector-shaped blades.
[0017] In a possible implementation, the flow guide cylinder is a circular tube.
[0018] In a possible implementation, the flow guide cylinder is a circular tube.
[0019] In a possible implementation, the flow guide cylinder is a circular tube.
[0020] Other advantages of the present application will be described in more detail in conjunction with the following description and drawings.
[0021] It should be understood that the above description is only a summary of the technical solutions of the present application, so as to enable a general understanding of the technical means of the present application, and then implement it according to the content of the description. In order to make the above and other purposes, features and advantages of the present application more obvious and easy to understand, the following specific embodiments of the present application are described. Attached Figure Description
[0022] To more clearly illustrate the technical solutions of the embodiments of this application, the accompanying drawings used in the embodiments will be briefly described below. The accompanying drawings are incorporated in and constitute a part of this specification. These drawings illustrate embodiments conforming to this application and are used together with the specification to explain the technical solutions of this application. It should be understood that the drawings only illustrate certain embodiments of this application and should not be considered as a limitation on the scope of protection. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort. Furthermore, the same reference numerals denote the same components throughout the drawings. In the drawings:
[0023] Figure 1 This is a schematic diagram of a gas-liquid separator provided in an embodiment of this application;
[0024] Figure 2 This is a schematic diagram of the left side of a gas-liquid separator provided in an embodiment of this application;
[0025] Figure 3 A three-dimensional schematic diagram of a gas-liquid separator provided in an embodiment of this application;
[0026] Figure 4 A schematic diagram of a nozzle having an expansion section and a contraction section is provided for an embodiment of this application;
[0027] Figure 5 A schematic diagram of a nozzle with a drainage hole provided for an embodiment of this application;
[0028] Figure 6 This is a schematic diagram of a structure of multiple blades provided in an embodiment of this application;
[0029] In the accompanying drawings, the same or corresponding reference numerals indicate the same or corresponding parts.
[0030] Wherein, 1-gas-liquid separator body; 101-first side; 102-second side; 11-gas-liquid mixture inlet; 12-drain outlet; 13-exhaust outlet; 2-nozzle; 21-contraction section; 22-expansion section; 201-drain hole; 3-guide tube; 4-blade. Detailed Implementation
[0031] Exemplary embodiments of this application will now be described in more detail with reference to the accompanying drawings. While exemplary embodiments of this application are shown in the drawings, it should be understood that this application can be implemented in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided to enable a more thorough understanding of this application and to fully convey the scope of this application to those skilled in the art.
[0032] In the description of the embodiments of the present application, it should be understood that terms such as "include" or "have" are intended to indicate that there exist the disclosed features, numbers, components, parts, or combinations thereof in the specification, and do not exclude the possibility that one or more other features, numbers, components, parts, or combinations thereof exist.
[0033] Unless otherwise specified, " / " means or, for example, A / B can mean A or B; "and / or" in this document only describes the association relationship of the associated objects, and means that there can be three relationships, for example, A and / or B can mean that A exists alone, A and B exist together, and B exists alone.
[0034] The terms "first", "second", and the like are only used to distinguish the same or similar technical features for the purpose of description, and cannot be understood as indicating or implying relative importance or quantity of the technical features. Therefore, the features defined by "first", "second", and the like can explicitly or implicitly include one or more such features. In the description of the embodiments of the present application, unless otherwise specified, the meaning of the term "a plurality of" is two or more than two.
[0035] In the related art, a method of gravity separation is generally used. Under the action of gravity, hydrogen and water are immiscible and have different densities, and hydrogen can be separated by floating under the action of the density difference, so as to form a certain proportion of gas phase and liquid phase.
[0036] Although the method of gravity separation in the related art can realize the separation of gas phase and liquid phase, in order to ensure good gas-liquid phase separation efficiency, the liquid phase should be ensured to have sufficient residence time in the separator, therefore, the gas-liquid separator in the related art has a large demand in the length direction and diameter direction of the liquid phase movement, which will cause the size of the gas-liquid separator to be large, for example, the diameter of the gas-liquid separator in the related art can be 406 mm, and the length can be 2140 mm.
[0037] In view of this, the present application provides a gas-liquid separator and a proton exchange membrane electrolytic cell, by arranging a nozzle, a flow guide cylinder and a plurality of blades inside the gas-liquid separator body, two ways of collision and centrifugation are added in the fluid movement, so as to improve the separation efficiency of the gas-liquid phase, and then the size of the gas-liquid separator can be reduced on the basis of ensuring the separation efficiency.
[0038] The present application will be described in detail below with reference to the accompanying drawings and in combination with embodiments.
[0039] As Figure 1 , Figure 2 and Figure 3As shown, the gas-liquid separator can include a gas-liquid separator body 1, a gas-liquid mixture inlet 11 is arranged at the top of the gas-liquid separator body 1 close to the first side 101, a liquid outlet 12 is arranged at the bottom of the gas-liquid separator body 1 close to the second side 102, and the first side 101 is provided with a gas outlet 13 close to the top;
[0040] The gas-liquid separator body 1 is internally provided with a spray pipe 2, and the spray pipe 2 is close to the first side 101.
[0041] The spray pipe 2 is fixedly connected with a flow guide cylinder 3 away from the first side 101.
[0042] The flow guide cylinder 3 is fixedly connected with a plurality of blades 4 arranged in a ring array away from the spray pipe 2, and the end of the plurality of blades 4 away from the flow guide cylinder 3 is close to the second side 102.
[0043] Specifically, the spray pipe 2, the flow guide cylinder 3 and the plurality of blades 4 arranged in a ring array are arranged in the gas-liquid separator body 1, after the mixed fluid enters the gas-liquid separator body 1 through the gas-liquid mixture inlet 11, the mixed fluid collides with the spray pipe 2 to be preliminarily separated, the gas collides and is easy to turn, after passing above the flow guide cylinder 3, the gas passes through the plurality of blades 4 arranged in a ring array, the plurality of blades 4 arranged in a ring array can play a centrifugal role, the preliminarily separated gas moves in a spiral shape along the plurality of blades 4, the liquid particles are easy to be thrown to the inner wall of the gas-liquid separator body 1 when the moving direction of the liquid particles changes, and then slide along the inner wall to the liquid outlet 12 and flow out, so that the plurality of blades 4 realizes re-separation, and the re-separated gas enters the flow guide cylinder 3, and then is discharged from the spray pipe 2 to the gas outlet 13 through the flow guide cylinder 3; and the preliminarily separated liquid particles collide with the spray pipe 2, and the small liquid particles gather to a certain size and then fall downward, and then flow out from the liquid outlet 12. That is to say, the collision and centrifugal methods are added to the fluid motion, so that the separation efficiency of the gas-liquid phase is improved, and then the size of the gas-liquid separator can be reduced on the basis of ensuring the separation efficiency. In actual application, the gas-liquid separator in the embodiment can have a diameter of 400 mm and a length of 1000 mm on the basis of ensuring the separation efficiency of 99.9%, which is nearly half of the size of the gas-liquid separator in the related art.
[0044] In a possible implementation, in order to ensure the collision effect of the spray pipe 2, the spray pipe 2 can be located below the gas-liquid mixture inlet 11.
[0045] In a possible implementation, on the basis of ensuring the separation efficiency, in order to further shorten the separation time of the gas-liquid, for example, Figure 4 As shown, the spray pipe 2 can have a contraction section 21 and an expansion section 22 connected in sequence, and the spray pipe 2 of the expansion section 22 is close to the first side 101.
[0046] By means of the nozzle 2 with the converging section 21 and the diverging section 22, the flow interface can be first reduced and then expanded during the process of discharging the separated gas from the nozzle 2 to the exhaust port 13, and the gas can obtain a higher flow rate and pressure in a shorter time, thereby escaping quickly. In practical applications, the separation time in the embodiment can be less than 60 s.
[0047] In a possible implementation, in order to ensure the collision effect of the nozzle 2, when the nozzle has the converging section 21 and the diverging section 22, the diverging section 22 can be located below the gas-liquid mixture inlet 11.
[0048] In a possible implementation, in order to ensure the quick escape of the gas, when the nozzle has the converging section 21 and the diverging section 22, the corresponding sizes can be determined by calculation, and in this case, the Mach number of the converging section 21 is less than 1, and the Mach number of the diverging section 22 is greater than 1.
[0049] In a possible implementation, as shown in Figure 5 , the nozzle 2 is provided with a liquid discharge hole 201 near the bottom end of the gas-liquid separator body 1, so that the liquid remaining in the gas can be discharged to the liquid discharge port 12 from the liquid discharge hole 201 at the bottom end during the process of escaping from the nozzle 2 to the exhaust port 13.
[0050] In a possible implementation, in order to ensure that the liquid after centrifugation can be quickly discharged from the liquid discharge port 12, the plurality of blades 4 away from the end of the flow guide cylinder 3 can be above the liquid discharge port 12.
[0051] In a possible implementation, the plurality of blades 4 can be conical blades or fan-shaped blades, as shown in Figure 6 , (a) in Figure 6 is a structural schematic view of the plurality of blades at a first viewing angle, Figure 6 (b) in Figure 6 is a structural schematic view of the plurality of blades at a second viewing angle, The plurality of blades in
[0052] may be 36 conical blades.
[0053] The embodiment of the application further provides a proton exchange membrane electrolyzer, which comprises the gas-liquid separator described in the foregoing embodiment, and the hydrogen path outlet of the proton exchange membrane electrolyzer is provided on the cathode side and connected with the gas-liquid mixture inlet 11 of the gas-liquid separator.
[0054] It should be noted that, in addition to the hydrogen path outlet of the proton exchange membrane electrolyzer, for a mixed fluid with a gas-liquid phase that is not soluble and with a gas component of more than 60%, the gas-liquid separator in the embodiment can be used for gas-liquid separation.
[0055] Therefore, the application provides a gas-liquid separator for a proton exchange membrane electrolyzer and a proton exchange membrane electrolyzer. The gas-liquid separator comprises a gas-liquid separator body. A gas-liquid mixture inlet is arranged at the top of the gas-liquid separator body close to the first side face. A liquid outlet is arranged at the bottom of the gas-liquid separator body close to the second side face. An exhaust port is arranged at the first side face close to the top. A spray pipe is arranged inside the gas-liquid separator body. The spray pipe is arranged close to the first side face. A flow guide cylinder is fixedly connected to the side of the spray pipe away from the first side face. A plurality of blades arranged in a ring array are fixedly connected to the side of the flow guide cylinder away from the spray pipe. The end of the plurality of blades away from the flow guide cylinder is arranged close to the second side face. By arranging the spray pipe, the flow guide cylinder and the plurality of blades inside the gas-liquid separator body, the collision and centrifugal motion of the fluid are increased, thereby improving the separation efficiency of the gas-liquid phase. In this way, the size of the gas-liquid separator can be reduced while ensuring the separation efficiency.
[0056] In the description of the present specification, the description referring to the terms "some possible embodiments", "some embodiments", "an example", "a specific example", or "some examples" and the like means that the specific features, structures, materials or characteristics described in connection with the embodiments or examples are included in at least one embodiment or example of the present application, and the above terms do not necessarily represent the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any appropriate manner in any one or more embodiments or examples. In addition, the person skilled in the art can combine and combine the different embodiments or examples described in the specification and the features of the different embodiments or examples without contradiction.
[0057] Although the spirit and principles of the present application have been described above with reference to several specific embodiments, it should be understood that the present application is not limited to the disclosed specific embodiments, and the division of aspects does not mean that the features in these aspects cannot be combined. The present application is intended to cover various modifications and equivalent arrangements included in the spirit and scope of the appended claims.
Claims
1. A gas-liquid separator characterized by, The gas-liquid separator comprises a gas-liquid separator body (1), a gas-liquid mixture feeding port (11) is arranged at the top of the gas-liquid separator body (1) near the first side (101), a liquid discharge port (12) is arranged at the bottom of the gas-liquid separator body (1) near the second side (102), and an exhaust port (13) is arranged at the position near the top of the first side (101); A nozzle (2) is arranged inside the gas-liquid separator body (1), and the nozzle outlet of the nozzle (2) is near the first side (101); A flow guide cylinder (3) is fixedly connected to the side of the nozzle (2) away from the first side (101); A plurality of blades (4) arranged in an annular array are fixedly connected to the side of the flow guide cylinder (3) away from the nozzle (2), and the end of the plurality of blades (4) away from the flow guide cylinder (3) is near the second side (102).
2. The gas-liquid separator of claim 1, wherein, The nozzle (2) is located below the gas-liquid mixture feeding port (11).
3. The gas-liquid separator of claim 1, wherein, The nozzle (2) has a converging section (21) and a diverging section (22) connected in sequence, and the nozzle outlet of the diverging section (22) is near the first side (101).
4. The gas-liquid separator of claim 3, wherein, The diverging section (22) is located below the gas-liquid mixture feeding port (11).
5. The gas-liquid separator of claim 3, wherein, The Mach number of the converging section (21) is less than 1, and the Mach number of the diverging section (22) is greater than 1.
6. The gas-liquid separator of claim 1, wherein, The nozzle outlet of the nozzle (2) is provided with a liquid discharge hole (201) near the bottom end of the gas-liquid separator body (1).
7. The gas-liquid separator of claim 1, wherein, The end of the plurality of blades (4) away from the flow guide cylinder (3) is above the liquid discharge port (12).
8. The gas-liquid separator of claim 1, wherein, The plurality of blades (4) are conical blades or fan-shaped blades.
9. The gas-liquid separator of claim 1, wherein, The flow guide cylinder (3) is a circular tube.
10. A proton exchange membrane electrolyzer comprising the gas-liquid separator according to any one of claims 1-9, and a hydrogen path outlet is arranged at the cathode side of the proton exchange membrane electrolyzer, and the hydrogen path outlet is connected with the gas-liquid mixture feeding port (11) of the gas-liquid separator.