Gas-liquid separator and hydrogen production system

Abstract

According to the gas-liquid separator and the hydrogen production system, the baffles are arranged in the separator body, each baffle is fan-shaped, the arc part of each baffle is connected with the inner wall of the separator body, one end of each arc part is located on the center line of the top of the separator body, and the other end of each arc part is located on the side face of the separator body. Therefore, the baffle plate is additionally arranged in the separator body, so that the collision disturbance between the gas-liquid two-phase flow and the baffle plate can be increased, the gas in the gas-liquid two-phase flow entering the gas-liquid separator can be separated more easily, and the separation efficiency is improved.

Description

Technical Field

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

[0002] Green hydrogen is generated by renewable energy and then obtained by electrolyzing water. Hydrogen production by electrolysis of water is to decompose water molecules into hydrogen and oxygen through an electrochemical process under the action of direct current, and precipitate them at the cathode and anode respectively. The alkaline electrolysis of water to produce hydrogen technology is currently the most mature, lowest cost and more economical technology route.

[0003] For the current alkaline water electrolyzer, separation equipment plays a vital role. The two-phase flow of hydrogen / oxygen and alkali solution enters the gas-liquid separator from the electrolyzer for separation. After separation, it returns to the electrolyzer through the system circulation. In this process, the separation capacity of the gas-liquid separator plays an important role in the purity of hydrogen and the safety of the entire electrolyzer. The traditional gas-liquid separator uses gravity sedimentation separation. The liquid in the gas-liquid mixture entering the separator sinks to the bottom of the separator, and the gas part enters the upper space. However, this method has a poor separation effect, and it is easy for the gas to be mixed in the solution and further circulate into the entire hydrogen production system, resulting in the mixing of hydrogen and oxygen in the hydrogen production system. When the hydrogen concentration in the oxygen is too high, it will cause safety risks.

[0004] Based on this, there is an urgent need for a gas-liquid separator to solve the problem of poor separation effect of the gas-liquid separator in the prior art. Utility Model Content

[0005] The purpose of the present application is to provide a gas-liquid separator and a hydrogen production system to solve the technical problem of poor separation effect of the gas-liquid separator in the prior art.

[0006] In order to solve the above technical problems, this application is implemented as follows:

[0007] In a first aspect, the present application provides a gas-liquid separator, the gas-liquid separator comprising a separator body, a gas-liquid two-phase inlet, a gas outlet and a reflux port; the gas-liquid separator further comprises a plurality of baffles arranged inside the separator body;

[0008] The baffle is fan-shaped, and the arc portion of the baffle is connected to the inner wall of the separator body. One end of the arc portion is located on the top center line of the separator body, and the other end is located on the side of the separator body.

[0009] Optionally, any two adjacent baffles are arranged axially symmetrically with the central axis of the gas-liquid separator as the axis of symmetry.

[0010] Optionally, the central angle of the baffle is greater than 180° and less than 270°.

[0011] Optionally, the end of the arc portion located on the side of the separator body is lower than the liquid level of the liquid in the gas-liquid separator.

[0012] Optionally, a notch is provided at the bottom of the baffle.

[0013] Optionally, the shape of the notch is a sector, and the central angle of the notch is an obtuse angle.

[0014] Optionally, the distance between any two adjacent baffles is less than or equal to the inner diameter of the gas-liquid separator, and greater than or equal to one fifth of the inner diameter of the gas-liquid separator.

[0015] Optionally, the spacing between any two adjacent baffles is equal.

[0016] In a second aspect, the present application provides a hydrogen production system, which includes the gas-liquid separator as described above.

[0017] Optionally, the gas-liquid separator is arranged horizontally in the system.

[0018] Compared with the prior art, the present application provides a gas-liquid separator, by arranging a baffle inside the separator body, each baffle is fan-shaped, the arc portion of the baffle is connected to the inner wall of the separator body, one end of the arc portion is located on the top center line of the separator body, and the other end is located on the side of the separator body. In this way, the design of adding a baffle inside the separator body can increase the collision disturbance between the gas-liquid two-phase flow and the baffle, so that the gas in the gas-liquid two-phase flow entering the gas-liquid separator is easier to separate, and the separation efficiency is improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a front view of a gas-liquid separator provided in an embodiment of the present application;

[0020] Figure 2 is a top view of a gas-liquid separator provided in an embodiment of the present application;

[0021] Figure 3 is a structural schematic diagram of a baffle provided in an embodiment of the present application;

[0022] Figure 4a It is one of the schematic diagrams of the axisymmetric arrangement of the baffles provided in the embodiment of the present application;

[0023] Figure 4b This is the second schematic diagram of the axisymmetric arrangement of the baffles provided in the embodiment of the present application;

[0024] The following are the descriptions of the reference numerals:

[0025] 1-gas-liquid separator; 11-separator body; 12-gas-liquid two-phase inlet; 13-gas outlet; 14-reflux outlet; 15-baffle; 151-notch. DETAILED DESCRIPTION

[0026] In order to make the purpose, advantages and features of the present application clearer, the gas-liquid separator proposed in the present application is further described in detail below in conjunction with the accompanying drawings. It should be noted that the accompanying drawings are all in a very simplified form and are not in precise proportions, and are only used to conveniently and clearly assist in explaining the purpose of the embodiments of the present application.

[0027] In order to facilitate the understanding of the present application, the present application is described in more detail below in conjunction with the accompanying drawings and specific embodiments. It should be noted that when an element is described as "fixed to" another element, it can be directly on another element, or there can be one or more centered elements therebetween. When an element is described as "connected" to another element, it can be directly connected to another element, or there can be one or more centered elements therebetween. The terms "vertical", "horizontal", "left", "right", "inside", "outside" and similar expressions used in this specification are only for illustrative purposes. In the description of the present utility model, the terms "first" and "second" are used only for descriptive purposes and cannot be understood as indicating relative importance or implicitly indicating the number of technical features indicated. Therefore, unless otherwise specified, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features; the meaning of "multiple" is two or more. The term "include" and any variation thereof means non-exclusive inclusion, and one or more other features, integers, steps, operations, units, components and / or combinations thereof may be present or added.

[0028] In addition, unless otherwise expressly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, an indirect connection through an intermediate medium, or a connection between two components. All technical and scientific terms used in this specification have the same meaning as those commonly understood by technicians in the technical field of this application. The terms used in the specification of this application are only for the purpose of describing specific embodiments and are not used to limit the utility model. The term "and / or" used in this specification includes any and all combinations of one or more related listed items.

[0029] In addition, the technical features involved in the different embodiments of the present application described below can be combined with each other as long as they do not conflict with each other.

[0030] refer to Figure 1 and Figure 2 ,in, Figure 1 This is a front view of a gas-liquid separator provided in an embodiment of the present application. Figure 2 A top view of a gas-liquid separator provided in an embodiment of the present application, from Figure 1 and Figure 2 As can be seen from the figure, the gas-liquid separator 1 comprises a separator body 11 , a gas-liquid two-phase inlet 12 , a gas outlet 13 , a reflux port 14 and a plurality of baffles 15 .

[0031] Among them, the gas-liquid two-phase inlet 12, the gas outlet 13 and the reflux port 14 are all arranged on the outer wall of the separator body 1, and are all connected with the inner cavity of the separator body 11. The gas-liquid two-phase flow coming out of the electrolytic cell enters the inner cavity of the separator body 11 through the gas-liquid two-phase inlet 12. Due to the different densities of gas and liquid, most of the gas is distributed in the upper part of the inner cavity of the separator body 11, and then discharged through the gas outlet 13; due to gravity, the liquid is distributed in the lower part of the inner cavity of the separator body 11, and the liquid continues to move forward, flows out from the reflux port 14, and then flows back to the system for circulation.

[0032] like Figure 3 , which is a schematic diagram of the structure of a baffle provided in an embodiment of the present application. The baffle 15 is fan-shaped, and the central angle of the baffle 15 ( Figure 3 The setting of R) shown in FIG. 1 needs to consider the flow of liquid and gas at the same time, and can be set to be greater than 180° and less than 270°.

[0033] Furthermore, if the value of the central angle R is too large, the liquid flow resistance will increase, and if it is too small, the separation effect will be affected. In addition, the end of the arc portion on the side of the separator body 11 ( Figure 3 The position A) shown in the figure needs to be set to be lower than the liquid level of the liquid in the gas-liquid separator 1. Therefore, the value of the central angle R may preferably be in the range of greater than or equal to 210° and less than or equal to 240°.

[0034] When the baffle 15 is connected to the separator body 11, the arc portion ( Figure 3 The arc AB shown in FIG. 1 can be connected to the inner wall of the separator body 11, and one end of the arc portion ( Figure 3 The position B) shown in FIG. 1 may be located at the top center line of the separator body 11 ( Figure 2 L-L') shown in the figure, and the other end ( Figure 3 The position A) shown in FIG. 1 is located on the side of the separator body 11 .

[0035] Further, in the embodiment of the present application, any two adjacent baffles are arranged axially symmetrically with the central axis of the gas-liquid separator 1 as the symmetry axis. Figure 4a and Figure 4b, is a schematic diagram of the axisymmetric arrangement of the baffles provided in an embodiment of the present application, Figure 4a and Figure 4b The viewing angle may be a viewing angle viewed from the side of the gas-liquid separator 1 . Figure 4a Shown is a baffle located in the separator body 11, Figure 4b The separator body 11 is shown. Figure 4a The baffle shown in the figure is adjacent to another baffle, from Figure 4a and Figure 4b It can be seen that the two baffles are based on the central axis of the gas-liquid separator 1 ( Figure 4a and Figure 4b The H-H') shown in the figure is an axis of symmetry and is arranged axially symmetrically.

[0036] In this way, the baffles inside the gas-liquid separator are arranged axially symmetrically. This staggered distribution can separate the hydrogen and oxygen in the gas-liquid two-phase flow more thoroughly, while extending the flow path during gas separation, further improving the separation efficiency and ensuring the safety of the entire hydrogen production system.

[0037] Further, such as Figure 3 As shown, a notch 151 may be provided at the bottom of the baffle 15. The notch 151 is mainly provided to facilitate the discharge of the solution in the gas-liquid separator 1 during equipment maintenance.

[0038] The specific shape of the notch 151 may not be limited. In one embodiment, the shape of the notch 151 may be as follows: Figure 3 In the fan shape shown in FIG. 1 , in other possible implementations, the shape of the notch 151 may also be circular or rectangular, without specific limitation.

[0039] When the shape of the notch 151 is a sector, the central angle of the notch 151 may be an obtuse angle.

[0040] In the embodiment of the present application, the spacing between any two adjacent baffles 15 also needs to be arranged reasonably. If the spacing is too small, it is difficult to manufacture and maintain, and the flow resistance increases; if the spacing is too large, the separation effect will deteriorate. Based on this, in the embodiment of the present application, the spacing between any two adjacent baffles is set to be less than or equal to the inner diameter of the gas-liquid separator, and greater than or equal to one fifth of the inner diameter of the gas-liquid separator.

[0041] Furthermore, the baffles 15 disposed inside the separator body 11 may be evenly distributed, that is, the spacing between any two adjacent baffles may be equal.

[0042] In the embodiment of the present application, the material of the baffle 15 can be a metal material, such as an iron plate or a stainless steel plate, or other water-impermeable materials, without specific limitation.

[0043] In another embodiment of the present application, a hydrogen production system is also provided, which may include the gas-liquid separator described above.

[0044] Furthermore, the gas-liquid separator is arranged horizontally in the system.

[0045] The above description is only a description of the preferred embodiments of the present application, and is not intended to limit the scope of the present application. Any changes or modifications made by a person of ordinary skill in the art based on the above disclosure shall fall within the scope of protection of the claims.

Claims

1. A gas-liquid separator, comprising a separator body, a gas-liquid two-phase inlet, a gas outlet and a reflux port; characterized in that: The gas-liquid separator also includes a plurality of baffles arranged inside the separator body; The baffle is fan-shaped, and the arc portion of the baffle is connected to the inner wall of the separator body. One end of the arc portion is located on the top center line of the separator body, and the other end is located on the side of the separator body.

2. The gas-liquid separator according to claim 1, characterized in that: Any two adjacent baffles are arranged axially symmetrically with the central axis of the gas-liquid separator as the symmetry axis.

3. The gas-liquid separator according to claim 1, characterized in that: The central angle of the baffle is greater than 180° and less than 270°.

4. The gas-liquid separator according to claim 3, characterized in that: The end of the arc portion located on the side surface of the separator body is lower than the liquid level of the liquid in the gas-liquid separator.

5. The gas-liquid separator according to claim 1, characterized in that: A notch is arranged at the bottom of the baffle.

6. The gas-liquid separator according to claim 5, characterized in that: The shape of the notch is a sector, and the central angle of the notch is an obtuse angle.

7. The gas-liquid separator according to claim 1, characterized in that: The distance between any two adjacent baffles is less than or equal to the inner diameter of the gas-liquid separator, and greater than or equal to one fifth of the inner diameter of the gas-liquid separator.

8. The gas-liquid separator according to any one of claims 1 to 7, characterized in that: The distance between any two adjacent baffles is equal.

9. A hydrogen production system, characterized in that: The system comprises the gas-liquid separator according to any one of claims 1-8.

10. The hydrogen production system according to claim 9, characterized in that: The gas-liquid separator is horizontally arranged in the system.

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