Gas-liquid separation device

Abstract

The utility model discloses a gas-liquid separation device which structurally comprises a tank body, a gas-liquid mixed liquid inlet is formed in the bottom of the tank body, a gas outlet is formed in the top of the tank body, a flow guide column is arranged in the tank body, the inlet end of the flow guide column is communicated with the liquid inlet, and the outlet end of the flow guide column is communicated with the interior of the tank body; a first filling body is arranged in the flow guide column, a supporting layer lower than the outlet end of the flow guide column is arranged outside the flow guide column in the tank body, a clear liquid outlet is formed in the side wall of the tank body below the supporting layer, a second filling body is arranged on the supporting layer, and the upper surface of the second filling body is higher than the outlet end of the flow guide column; the first filling body and the second filling body are both made of porous materials used for coalescing bubbles. The mixed liquid inlet and the clear liquid outlet are arranged below the tank body, and the flow guide column and the filling body made of the two-stage porous material are arranged in the tank body, so that bubbles are coalesced and separated in the flowing process of mixed liquid, a long flowing path is provided, and the gas-liquid separator has the characteristics that the gas-liquid separation efficiency is high, the separation is thorough, and the volume of the device is easy to miniaturize.

Description

Technical Field

[0001] The utility model belongs to the technical field of producing hydrogen by electrolyzing water in an alkaline electrolytic cell, and particularly relates to a gas-liquid separation device. Background Art

[0002] Hydrogen energy is a green energy with the characteristics of high energy density, clean and pollution-free. It is one of the main research directions of new energy. In the existing technology, alkaline water electrolysis to produce hydrogen is the most commonly used and most mature hydrogen production method. In this method, the electrolysis products hydrogen and oxygen flow out of the electrolytic cell together with the electrolyte, and the separation of liquid and gas is achieved in the gas-liquid separation device. How to efficiently and quickly separate the gas from the electrolyte plays an important role in improving production scale and efficiency. In the existing process, most of the separation processes use gravity sedimentation. This process has a slow separation speed and low separation efficiency. The equipment occupies a large area and is expensive. In addition, it is almost impossible to separate the fine bubbles dissolved in the electrolyte, resulting in the reflux electrolyte containing too much gas. There is a problem of easily causing gas back mixing and restricting electrolysis efficiency. There are safety hazards in the production process. In particular, the power of industrial electrolytic cells continues to increase, the gas production and gas production rate are higher, and the electrolyte gas content is also higher. This problem is more prominent. Utility Model Content

[0003] The purpose of the utility model is to provide a gas-liquid separation device to solve the problem of low electrolysis efficiency and potential safety hazards caused by incomplete gas-liquid separation in existing alkaline electrolysis cell systems.

[0004] The utility model is achieved through the following technical solutions:

[0005] The utility model proposes a gas-liquid separation device, the structure of which includes a tank body, a liquid inlet for a liquid-gas mixture is provided at the bottom of the tank body, a gas outlet is provided at the top of the tank body, a clear liquid outlet is provided on the lower side wall of the tank body, a guide column is provided in the tank body, the inlet end of the guide column is communicated with the liquid inlet, and the outlet end is communicated with the interior of the tank body; a first filling body is provided in the guide column, a support layer is provided outside the guide column in the tank body and is lower than the outlet end thereof, the clear liquid outlet is provided below the support layer, a second filling body is provided on the support layer, and the upper surface of the second filling body is higher than the outlet end of the guide column; the first filling body and the second filling body are both made of a porous material for coalescing bubbles;

[0006] Based on the above technical solution, by arranging the mixed liquid inlet and the clear liquid outlet at the bottom of the tank body, and arranging a guide column and a filling body made of two-stage porous material in the tank body, the mixed liquid can aggregate and separate bubbles during the flow process, and the flow path in the porous material is long, which has the characteristics of high gas-liquid separation efficiency, thorough separation and easy miniaturization of the equipment.

[0007] Furthermore, the porous material is a porous structure with a pore size of 10um to 200um and a porosity of 30% to 95%. The purpose of this design is to increase the flow path of the mixed liquid in the first and second filling bodies, and reasonably set the pore size to reduce the flow resistance of the liquid, thereby further improving the gas-liquid separation efficiency.

[0008] Furthermore, the porous material is a porous sponge, or a porous structure filled with particles, or a cotton mesh filled with fibers.

[0009] Preferably, the porous material is a three-dimensional cotton mesh structure made of metal fibers or organic fibers. The purpose of this design is to form a porous material surface with weak hydrophilicity or even hydrophobicity, so as to be more conducive to the capture of bubbles.

[0010] Preferably, the wire diameter of the metal fiber or organic fiber is 4um to 10um, and the metal fiber is stainless steel fiber, titanium fiber or titanium alloy fiber. The design purpose is to use fine fibers to increase the avoidance area of ​​the porous material, increase the capture points of bubbles, and be more conducive to the aggregation and growth of bubbles.

[0011] Furthermore, the thickness of the second filling body is not less than 1 cm. The purpose of this design is to ensure that after the mixed liquid flows out of the guide column, it still needs to flow through a path of sufficient length so that the bubbles in the mixed liquid can be fully separated, and then the clear liquid does not contain bubbles, thereby achieving the purpose of complete separation of gas and liquid.

[0012] Furthermore, the support layer is a porous plate or a wire mesh layer, so as to provide support for the second filling body without affecting the flow of the liquid.

[0013] Furthermore, an overflow plate is provided at the clear liquid outlet, and the top of the overflow plate does not contact the second filling body. The purpose of this design is to prevent the clear liquid from flowing out directly after sinking, and to control the outflow speed, thereby reserving a period of standing time before the clear liquid is discharged, providing more sufficient time for the bubbles to separate from the liquid.

[0014] Furthermore, an inverted L-shaped baffle is provided at the clear liquid outlet, and an overflow pipe with adjustable height is provided on the horizontally arranged baffle edge of the L-shaped baffle. The purpose of this design is to control the outflow speed of the clear liquid and adjust the standing time before the clear liquid is discharged through the overflow pipe with adjustable height, thereby providing more sufficient time for the bubbles to separate from the liquid.

[0015] Furthermore, there are two symmetrically arranged clear liquid outlets, and this design can form a micro-circular flow in the tank body, providing a pulling force for the liquid to form a circular flow in the second filling body.

[0016] Beneficial effects

[0017] The working principle and technical effects of the utility model are:

[0018] The gas-liquid separation tank of the present invention arranges the mixed liquid inlet and the clear liquid outlet at the bottom of the tank body. The gas-liquid mixed liquid containing a large number of bubbles extracted from the electrolytic cell first flows upward through the first filling body through the guide column to perform the first-level gas-liquid separation, and then flows in the second filling body under the action of gravity to perform the second-level gas-liquid separation. Since the first filling body and the second filling body are made of porous materials, during the flow of the mixed liquid, the suspended bubbles in the mixed liquid, especially the fine bubbles, are captured by the porous material and aggregated and grown into large bubbles. As the liquid flows, the large bubbles are separated from the liquid flow direction by buoyancy and float to the top of the tank, and then discharged from the gas outlet, while the remaining liquid continues to flow along the pores of the second filling body, and the fine bubbles it carries continue to be captured, aggregated and grown by the porous material of the second filling body. After all the suspended bubbles are fully separated, the clear liquid sinks to the bottom of the tank and is discharged through the clear liquid outlet, completing the gas-liquid separation.

[0019] The gas-liquid separation tank of the utility model captures suspended bubbles through porous materials and makes them coalesce and grow, and the setting of two-stage filling bodies does not require the porous material to have a pore size finer than the micro bubbles, has low flow resistance, can effectively extend the liquid flow path, captures bubbles more thoroughly, requires a lower tank volume, and has the characteristics of high gas-liquid separation efficiency, thorough separation and miniaturization of the equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Other features, objects and advantages of the present invention will become more apparent from the detailed description of the non-limiting embodiments with reference to the following drawings:

[0021] Figure 1 This is a schematic structural diagram of the first embodiment of the present utility model;

[0022] Figure 2 This is a schematic diagram of the working principle of the utility model;

[0023] Figure 3 This is a schematic structural diagram of the second embodiment of the present utility model;

[0024] Figure 4 This is a schematic structural diagram of the third embodiment of the present invention;

[0025] Figure 5 For this utility model Figure 4 Schematic diagram of the enlarged structure of part A;

[0026] In the figure: tank body 1; liquid inlet 11; clear liquid outlet 12; gas outlet 13; guide column 2; inlet end 21; outlet end 22; support layer 3; first filling body 4; second filling body 5; overflow plate 6; L-shaped baffle 7; overflow pipe 71. DETAILED DESCRIPTION

[0027] The present invention will be further described in detail below with reference to the embodiments, but the embodiments of the present invention are not limited thereto.

[0028] Example 1

[0029] like Figure 1 As shown, this embodiment provides a gas-liquid separation device, which includes a tank body 1, a liquid inlet 11 for a liquid-gas mixture is provided at the bottom of the tank body 1, a gas outlet 13 is provided at the top of the tank body 1, a clear liquid outlet 12 is provided on the lower side wall of the tank body 1, a guide column 2 is provided in the tank body 1, an inlet end 21 of the guide column 2 is communicated with the liquid inlet 11, and an outlet end 22 is communicated with the interior of the tank body 1; a first filling body 4 is provided in the guide column 2, and a support column 2 is provided outside the guide column 2 in the tank body 1 below its outlet end 22. The supporting layer 3 is a porous plate or a wire mesh layer, the clear liquid outlet 12 is arranged below the supporting layer 3, and a second filling body 5 is provided on the supporting layer 3, and the upper surface of the second filling body 5 is higher than the outlet end 22 of the guide column 2; the first filling body 4 and the second filling body 5 are both made of a porous material for agglomerating bubbles, wherein the first filling body 4 can completely fill or partially fill the guide column 2, and the filling thickness of the second filling body 5 is not less than 1 cm, and after filling, it fills the entire cross-section of the tank body 1.

[0030] Preferably, the porous material is a porous structure with a pore size of 10um to 200um and a porosity of 30% to 95%, and can be a porous sponge, a porous structure filled with particles, or a fiber-filled cotton mesh;

[0031] When the porous material is a fiber-filled cotton mesh, the fiber-filled cotton mesh is made of metal fibers with weak hydrophilicity or organic fibers that have been hydrophobically treated to form a three-dimensional cotton mesh structure. The wire diameter of the metal fibers or organic fibers is set to 4um to 10um, and the metal fibers are made of stainless steel fibers, titanium fibers or titanium alloy fibers to form a structure with a large specific surface area, which is more conducive to capturing bubbles; preferably, the metal fibers can also be metal fibers made of other materials that are resistant to alkali corrosion.

[0032] Preferably, when the porous material is a fiber-filled cotton mesh, the upper surface of the second filler 5 is further provided with a limiting layer made of a porous plate or a wire mesh to prevent the metal fibers from escaping into the liquid above due to the floating of bubbles and the action of liquid flow.

[0033] like Figure 2As shown, in actual use, the mixed liquid is introduced from the liquid inlet 11, and flows through the first filling body 4 in the guide column 2 and the second filling body 5 outside the guide column 2 in sequence, wherein the gathered and grown bubbles float to the top of the tank and are discharged from the gas outlet 13, and the clear liquid after the suspended bubbles are completely separated is discharged from the clear liquid outlet 12 on the bottom side wall of the tank body 1 and flows back into the electrolytic cell to complete the gas-liquid separation.

[0034] Example 2

[0035] like Figure 3 As shown, this embodiment provides a gas-liquid separation device, which differs from the first embodiment in that:

[0036] Based on the structure of the first embodiment, an overflow plate 6 is provided at the clear liquid outlet 12, the top of which does not contact the second filling body 5. The provision of the overflow plate 6 in this embodiment prevents the clear liquid from directly flowing out after sinking, thereby allowing a period of rest before the clear liquid is discharged. This prevents the formation of a large liquid flow pulling force that would cause the mixed liquid to flow too quickly within the first filling body 4 and the second filling body 5, causing some fine bubbles to be carried into the clear liquid by the liquid flow before they can be captured, thereby reducing the gas-liquid separation effect.

[0037] Example 3

[0038] like Figure 4 、 5 As shown, this embodiment provides a gas-liquid separation device, which differs from the first embodiment in that:

[0039] Based on the structure of the first embodiment, an inverted L-shaped baffle 7 is provided at the clear liquid outlet 12 , and an overflow pipe 71 with adjustable height is provided on the horizontally arranged sidewall of the L-shaped baffle 7 .

[0040] Preferably, there are two clear liquid outlets 12 and they are symmetrically arranged relative to the central axis of the tank body 1 . Correspondingly, the L-shaped baffles 7 are also provided in two groups symmetrically arranged relative to the central axis of the tank body 1 .

[0041] The advantages of this embodiment are: on the one hand, the L-shaped baffle 7 is used to prevent the clear liquid from flowing out directly after sinking, thereby reserving a period of standing time before the clear liquid is discharged, and avoiding the formation of a large liquid flow pulling force, so that the flow speed of the mixed liquid in the first filling body 4 and the second filling body 5 is too fast, and some fine bubbles are not captured in time and are carried into the clear liquid by the liquid flow, reducing the gas-liquid separation effect; on the other hand, a micro-circulation is formed in the tank body 1 through the symmetrically arranged clear liquid outlet 12, which promotes the pulling force of the liquid to form an annular flow in the second filling body 5.

[0042] The above description is merely a preferred embodiment of the present invention and does not limit the technical scope of the present invention. Therefore, any minor modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention still fall within the scope of protection of the present invention.

Claims

1. A gas-liquid separation device, characterized in that: Its structure includes a tank body, a liquid inlet for a liquid-gas mixture is provided at the lower part of the tank body, a gas outlet is provided at the top of the tank body, a clear liquid outlet is provided on the lower side wall of the tank body, a guide column is provided in the tank body, the inlet end of the guide column is connected with the liquid inlet, and the outlet end is connected with the interior of the tank body; a first filling body is provided in the guide column, a support layer is provided in the tank body outside the guide column and is lower than its outlet end, the clear liquid outlet is provided below the support layer, a second filling body is provided on the support layer, and the upper surface of the second filling body is higher than the outlet end of the guide column; the first filling body and the second filling body are both made of porous material for agglomerating bubbles.

2. A gas-liquid separation device according to claim 1, characterized in that: The porous material is a porous structure with a pore diameter of 10um to 200um and a porosity of 30% to 95%.

3. The gas-liquid separation device according to claim 1, characterized in that: The porous material is a porous sponge, or a porous structure filled with particles, or a cotton mesh filled with fibers.

4. A gas-liquid separation device according to claim 3, characterized in that: The porous material is a three-dimensional cotton mesh structure made of metal fibers or organic fibers.

5. A gas-liquid separation device according to claim 4, characterized in that: The diameter of the metal fiber or organic fiber is 4um to 10um, and the metal fiber is stainless steel fiber, titanium fiber or titanium alloy fiber.

6. The gas-liquid separation device according to claim 1, characterized in that: The thickness of the second filling body is not less than 1 cm.

7. The gas-liquid separation device according to claim 1, characterized in that: The supporting layer is a porous plate or a wire mesh layer.

8. The gas-liquid separation device according to claim 1, characterized in that: An overflow plate is provided at the clear liquid outlet, and the top end of the overflow plate does not contact the second filling body.

9. The gas-liquid separation device according to claim 1, characterized in that: An inverted L-shaped baffle is provided at the clear liquid outlet, and an overflow pipe with adjustable height is provided on the horizontally arranged sidewall of the L-shaped baffle.

10. The gas-liquid separation device according to claim 1, characterized in that: There are two clear liquid outlets symmetrically arranged.

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