Novel gas-liquid separation device for water electrolysis

Abstract

The novel gas-liquid separation device comprises a main shell and a liquid return pipe which are vertically arranged, a gas inlet assembly is arranged at the bottom of the main shell, and a gas exhaust hole is formed in the top of the main shell; a gas-liquid hole communicated with an air outlet hole of the electrolytic bath is formed in the air inlet assembly; one end of the liquid return pipe is positioned in the main shell, and the other end penetrates through the main shell and is communicated with alkali liquor of the electrolytic bath; a liquid return hole is formed in the liquid return pipe between the gas-liquid hole and the exhaust hole, a retention cavity for accommodating alkali liquor after gas-liquid separation is formed between the liquid return hole and the bottom of the main shell, and a separation cavity is formed between the liquid return hole and the exhaust hole; a gas-liquid separation assembly is arranged in the separation cavity; the gas-liquid separation assembly comprises a first separation plate, and a first vent hole is formed in the first separation plate. The gas-liquid separator is reasonable in structural design and has good gas-liquid separation efficiency.

Description

TECHNICAL FIELD

[0001] The utility model relates to gas -liquid separation technical field especially a kind of novel gas-liquid separation device for water electrolysis. BACKGROUND

[0002] Hydrogen combustion has the characteristics of high calorific value, fast and sufficient combustion speed and zero carbon emission, and is an excellent fuel in high-temperature applications. With the development of green electricity, water electrolysis is an excellent way to produce hydrogen and oxygen gas for combustion. When water electrolysis is used to produce hydrogen and oxygen gas, gas-liquid separation of hydrogen and oxygen gas is required to prevent water (alkali solution) from being lost and the alkali solution from corroding the pipeline and accessories. However, the current gas-liquid separation device for water electrolysis has the problem of low separation efficiency.

[0003] Therefore, there is an urgent need to design a new gas-liquid separation device for water electrolysis with high separation efficiency. SUMMARY

[0004] In order to overcome the shortcomings of the prior art, the technical scheme adopted by the utility model is as follows:

[0005] A novel gas-liquid separation device for water electrolysis, characterized by comprising a vertically arranged main housing and a liquid return pipe, the bottom of the main housing is provided with an air inlet assembly, and the top of the main housing is provided with an air outlet hole; the air inlet assembly is provided with a gas-liquid hole communicated with the air outlet hole of the electrolytic cell;

[0006] One end of the liquid return pipe is located inside the main housing, and the other end penetrates through the bottom of the main housing and is communicated with the alkali solution of the electrolytic cell; a liquid return hole is provided on the liquid return pipe between the gas-liquid hole and the air outlet hole, and the liquid return hole and the bottom of the main housing form a retention cavity for accommodating the separated alkali solution, and the liquid return hole and the air outlet hole form a separation cavity; a gas-liquid separation assembly is arranged in the separation cavity;

[0007] The gas-liquid separation assembly comprises a first separation plate, and the first separation plate is provided with a first air hole;

[0008] The liquid level of the liquid return hole is higher than that of the alkali solution in the electrolytic cell.

[0009] Preferably, a secondary housing is arranged between the gas-liquid separation assembly and the air outlet hole, the secondary housing is filled with a plurality of fire extinguishing balls in the form of microparticle spherical structure, and a ball blocking plate in the form of porous plate structure is arranged between the fire extinguishing balls and the main housing.

[0010] Preferably, the material of the fire extinguishing balls and the secondary housing is a heat-conducting material.

[0011] Preferably, the material of the fire extinguishing balls is one of steel, aluminum or copper.

[0012] Preferably, the gas-liquid separation assembly includes a first separation plate and a second separation plate arranged vertically from bottom to top, and the first separation plate and the second separation plate are respectively provided with a first vent hole and a second vent hole; the first vent hole and the second vent hole are projected in the vertical direction, and their projected outlines do not overlap.

[0013] Preferably, the first separation plate has an umbrella-shaped structure with a first vent located at the bottom of the umbrella shape; the second separation plate has a funnel-shaped structure with a second vent located at the bottom of the funnel shape.

[0014] Preferably, there are two or more of the first separation plate and the second separation plate arranged alternately.

[0015] Preferably, a pressure monitoring component is provided between the gas-liquid separation component and the exhaust port, and the pressure monitoring component includes a pressure gauge.

[0016] Preferably, the pressure monitoring component includes a pressure gauge, a sealed water tank, and a pressure pipe. The bottom of the water tank is filled with water, and an air gap is provided above the water. The air gap is connected to the interior of the main housing above the gas-liquid separation component through a connecting pipe. One end of the pressure pipe is located outside the water tank, and the other end passes through the top of the water tank and the air gap is located below the water surface. The pressure gauge is connected to the pressure pipe located at the end outside the water tank.

[0017] Preferably, the air intake assembly includes a diffuser tube with an annular structure disposed at the bottom of the main housing, and a check pipe extending upward and higher than the return liquid hole on one side of the diffuser tube. The check pipe is connected to the air outlet of the electrolytic cell through the air intake tube; the diffuser tube is provided with a plurality of gas-liquid holes.

[0018] Preferably, a gas-blocking plate with a porous plate structure is provided between the gas-liquid hole and the return liquid hole.

[0019] Preferably, a heat dissipation device is provided at the position corresponding to the retention cavity of the main housing.

[0020] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0021] This utility model has a reasonable structural design and good gas-liquid separation efficiency. BRIEF DESCRIPTION OF DRAWINGS

[0022] FIG. 1 This is a cross-sectional view of the overall structure of this utility model;

[0023] FIG. 2 for FIG. 1 A schematic diagram of the internal structure.

[0024] Wherein: main shell 10, exhaust hole 11, vice shell 12, stop ball plate 13, fire extinguishing ball 14, gas blocking plate 15, retention cavity 16, separation cavity 17, air inlet assembly 20, air inlet pipe 21, check pipe 22, diffusion pipe 23, gas-liquid hole 24, gas-liquid separation assembly 30, first separation plate 31, first air hole 31a, second separation plate 32, second air hole 32a, liquid return pipe 40, liquid return hole 41, pressure monitoring assembly 50, pressure gauge 51, water storage tank 52, pressure pipe 53, water 54, communication pipe 55, electrolytic cell 60, lye 61. DETAILED DESCRIPTION

[0025] For the convenience of understanding the present application, the present application will be described more fully below with reference to the accompanying drawings. The preferred embodiments of the present application are shown in the drawings. However, the present application can be realized in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided so that the disclosure of the present application can be more thoroughly and completely understood.

[0026] It should be noted that when an element is referred to as being "fixed" to another element, it can be directly on the other element or there can be intervening elements. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements can be present. As used herein the terms "vertical", "horizontal", "left", "right", "upper", "lower", and the like are used for clarity to provide relative positional information with respect to the embodiments.

[0027] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used in the description of the application herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. As used herein, the term "and / or" includes any and all combinations of one or more of the associated listed items.

[0028] The present application will be further described below with reference to the drawings and specific embodiments:

[0029] As shown in FIG. 1 , 2 A new gas-liquid separation device for water electrolysis, comprising a vertically arranged main shell 10 and a liquid return pipe 40, the bottom of the main shell 10 is provided with an air inlet assembly 20, and the top of the main shell 10 is provided with an exhaust hole 11; the air inlet assembly 20 is provided with a gas-liquid hole 24 in communication with the gas outlet hole of the electrolytic cell 60;

[0030] One end of the liquid return pipe 40 is located inside the main housing 10, and the other end penetrates through the bottom of the main housing 10 and communicates with the alkali liquor 61 of the electrolytic cell 60; a liquid return hole 41 is arranged on the liquid return pipe 40 between the gas-liquid hole 24 and the exhaust hole 11, and the liquid return hole 41 and the bottom of the main housing 10 form a retention cavity 16 for accommodating the alkali liquor 61 after gas-liquid separation, and the liquid return hole 41 and the exhaust hole 11 form a separation cavity 17; a gas-liquid separation assembly 30 is arranged in the separation cavity 17;

[0031] The gas-liquid separation assembly 30 includes a first separation plate 31, and the first separation plate 31 is provided with a first air passage 31a.

[0032] The liquid return hole is higher than the liquid level of the alkali liquor 61 in the electrolytic cell 60.

[0033] Further, a secondary housing 12 is arranged between the gas-liquid separation assembly 30 and the exhaust hole 11, and the secondary housing 12 is filled with a plurality of fire extinguishing balls 14, and the fire extinguishing balls 14 and the main housing 10 are provided with a ball blocking plate 13 in a porous plate structure.

[0034] Further, the fire extinguishing ball 14 is a heat-conducting body in a microparticle spherical structure, and the material of the secondary housing 12 is a heat-conducting material.

[0035] Further, the material of the fire extinguishing ball 14 is one of steel, aluminum or copper.

[0036] The irregular channels formed by filling the heat-conducting fire extinguishing balls 14 in a microparticle spherical structure in the embodiment can increase the flame propagation resistance, make the flame change direction constantly when propagating therein, increase the length and complexity of the propagation path; at the same time, the high-thermal-conductivity heat dissipation is used to quickly consume the flame energy, so that the temperature is lower than the ignition point and the flame is extinguished, thereby realizing the backfire blocking function.

[0037] The heat-conducting fire extinguishing ball 14 can also further cool the hydrogen-oxygen gas, so that the residual trace amount of gaseous alkali liquor is completely liquefied, and the gas-liquid separation efficiency is further improved.

[0038] Further, the gas-liquid separation assembly 30 includes a first separation plate 31 and a second separation plate 32 arranged vertically from bottom to top, and the first separation plate 31 and the second separation plate 32 are respectively provided with a first air passage 31a and a second air passage 32a; the first air passage 31a and the second air passage 32a take the vertical direction as the projection direction, and the projection profiles of the two do not coincide.

[0039] In the embodiment, the first separation plate 31 and the second separation plate 32 are arranged, and the first air passage 31a and the second air passage 32a with non-coinciding projection profiles are arranged, so that the gas-liquid mixture forms a vortex between the first separation plate 31 and the second separation plate 32, and the separation efficiency is improved.

[0040] Further, in order to improve the separation efficiency and make the separated liquid return quickly, the first separation plate 31 is in the shape of an umbrella, and the first vent hole 31a is arranged at the bottom of the umbrella; the second separation plate 32 is in the shape of a funnel, and the second vent hole 32a is arranged at the bottom of the funnel.

[0041] Further, the first separation plate 31 and the second separation plate 32 arranged alternately are respectively provided with two or more.

[0042] Further, in order to facilitate the monitoring of the internal pressure of the separation device, the gas-liquid separation assembly 30 is provided with a pressure monitoring assembly 50 between the gas-liquid separation assembly 30 and the exhaust hole 11, and the pressure monitoring assembly 50 comprises a pressure gauge 51.

[0043] Further, the pressure monitoring assembly 50 comprises a pressure gauge 51, a sealed water storage tank 52, and a pressure pipe 53, the bottom of the water storage tank 52 is provided with water 54, the upper part of the water 54 is provided with an air gap, the air gap is communicated with the inside of the main shell 10 above the gas-liquid separation assembly 30 through a communication pipe 55; one end of the pressure pipe 53 is located outside the water storage tank 52, the other end penetrates the top of the water storage tank 52 and the air gap below the water surface of the water 54, and the pressure gauge 51 is connected with the pressure pipe 53 at the end outside the water storage tank 52.

[0044] In order to enhance the conductivity of water during electrolysis, NaOH or KOH is usually added to water, so the lye 61 is alkaline. In this embodiment, in order to avoid corrosion of the pressure gauge 51 in long-term use, the pressure gauge 51 is separated from the separation cavity 17 by using water or other liquids with neutral pH value.

[0045] Further, in order to make the gas-liquid mixture fully contact with the lye 61 in the retention cavity 16, and avoid the lye 61 in the retention cavity 16 flowing back from the gas inlet pipe 21, the gas inlet assembly 20 comprises a diffusion pipe 23 arranged at the bottom of the main shell 10 in the shape of a ring, one side of the diffusion pipe 23 is provided with a check pipe 22 extending upward and higher than the liquid return hole 41, the check pipe 22 is communicated with the gas outlet hole of the electrolytic cell 60 through the gas inlet pipe 21; a plurality of gas-liquid holes 24 are arranged on the diffusion pipe 23.

[0046] Further, a gas blocking plate 15 in the shape of a porous plate is arranged between the gas-liquid hole 24 and the liquid return hole 41.

[0047] In this embodiment, the high-pressure and high-speed hydrogen-oxygen gas and lye 61 mixture sprayed out of the gas-liquid hole 24 is broken into tiny and discontinuous bubbles and the gas flow speed is slowed down when passing through the gas blocking plate 15 in the shape of a porous plate, thereby achieving the following two purposes:

[0048] 1、initial gas-liquid separation: when the lye 61 is retained in the retention cavity 16, the retained lye 61 contacts with the tiny gas bubbles, so that the gaseous lye 61 is liquefied and separated from the hydrogen-oxygen gas, and is retained in the retention cavity 16;

[0049] 2、when the backfire occurs, the discontinuous gas bubbles in the lye 61 can prevent the flame from spreading to the electrolytic tank 60.

[0050] Further, in order to control the lye 61 in the retention cavity 16 at a lower temperature and make the gaseous lye in the gas-liquid mixture quickly liquefied, the main shell 10 is provided with a heat dissipation device at a position corresponding to the retention cavity 16.

[0051] In use, first, the gas-liquid hole 24 is communicated with the gas outlet hole of the electrolytic tank 60, and the liquid return pipe 40 is communicated with the lye 61 of the electrolytic tank 60.

[0052] After electrolysis, the lye 61 produces hydrogen-oxygen gas, and the high temperature in the electrolysis process also inevitably causes the lye to gasify, so that when the hydrogen-oxygen gas is discharged from the electrolytic tank 60, the gaseous and aerosol lye 61 is inevitably brought out to form a gas-liquid mixture.

[0053] When the gas-liquid mixture passes through the gas-liquid separation assembly 30, under the action of the first separation plate 31 and the second separation plate 32, a vortex is formed to separate the gas and the liquid, and the separated lye flows back to the retention cavity 16, when the liquid surface of the lye 61 in the retention cavity 16 reaches the liquid return hole 41, the lye 61 automatically flows back to the electrolytic tank 60 through the liquid return pipe 40.

[0054] When the lye 61 is retained in the retention cavity 16, under the action of the lye 61 and the gas blocking plate 15, the lye 61 in the gas-liquid mixture can be initially separated; the lye 61 in the retention cavity 16 is controlled at a lower temperature by the heat dissipation device, which can accelerate the liquefaction of the gaseous lye 61 in the gas-liquid mixture, thereby improving the separation efficiency.

[0055] For those skilled in the art, other various corresponding changes and deformations can be made according to the above-described technical solutions and concepts, and all of these changes and deformations should belong to the protection scope of the utility model patent claim.

Claims

1. A novel gas-liquid separation device for water electrolysis, characterized by: The application relates to a vertical electrolysis tank, which comprises a main shell (10) and a liquid return pipe (40), the bottom of the main shell (10) is provided with an air inlet assembly (20), and the top of the main shell (10) is provided with an air outlet hole (11); the air inlet assembly (20) is provided with an air-liquid hole (24) which is communicated with an air outlet hole of an electrolysis tank (60); one end of the liquid return pipe (40) is located in the interior of the main shell (10), the other end penetrates through the bottom of the main shell (10) and is communicated with alkali liquor (61) of the electrolysis tank (60); a liquid return hole (41) is arranged on the liquid return pipe (40) between the air-liquid hole (24) and the air outlet hole (11), the liquid return hole (41) and the bottom of the main shell (10) form a retention cavity (16) for containing the alkali liquor (61) after gas-liquid separation, and the liquid return hole (41) and the air outlet hole (11) form a separation cavity (17); a gas-liquid separation assembly (30) is arranged in the separation cavity (17); the gas-liquid separation assembly (30) comprises a first separation plate (31), and the first separation plate (31) is provided with a first air passage (31a).

2. The novel gas-liquid separation device for water electrolysis according to claim 1, characterized by: The liquid return hole (41) is higher than the liquid level of the alkali liquor (61) in the electrolysis tank (60).

3. The novel gas-liquid separation device for water electrolysis according to claim 1, characterized by: A secondary shell (12) is arranged between the gas-liquid separation assembly (30) and the air outlet hole (11), the secondary shell (12) is filled with a plurality of fire extinguishing balls (14) in the form of microparticle spherical structures, the fire extinguishing balls (14) and the main shell (10) are provided with a ball blocking plate (13) in the form of a porous plate structure; the material of the fire extinguishing balls (14) is one of steel, aluminum or copper.

4. The novel gas-liquid separation device for water electrolysis according to claim 1, characterized by: The gas-liquid separation assembly (30) comprises a first separation plate (31) and a second separation plate (32) arranged vertically from bottom to top, the first separation plate (31) and the second separation plate (32) are respectively provided with a first air passage (31a) and a second air passage (32a); the first air passage (31a) and the second air passage (32a) take a vertical direction as a projection direction, and the projection profiles of the two do not coincide.

5. The novel gas-liquid separation device for water electrolysis according to claim 4, characterized by: The first separation plate (31) is in the form of an umbrella-shaped structure, and the first air passage (31a) is arranged at the bottom of the umbrella-shaped structure; the second separation plate (32) is in the form of a funnel-shaped structure, and the second air passage (32a) is arranged at the bottom of the funnel-shaped structure; the first separation plate (31) and the second separation plate (32) are staggered and arranged with two or more than two.

6. The novel gas-liquid separation device for water electrolysis according to claim 1, characterized by: A pressure monitoring assembly (50) is arranged between the gas-liquid separation assembly (30) and the air outlet hole (11), and the pressure monitoring assembly (50) comprises a pressure gauge (51).

7. The novel gas-liquid separation device for water electrolysis according to claim 6, characterized by: The pressure monitoring assembly (50) comprises a pressure gauge (51), a sealed water storage tank (52) and a pressure pipe (53), the bottom of the water storage tank (52) is provided with water (54), the upper side of the water (54) is provided with an air gap, the air gap is communicated with the inside of the main shell (10) above the gas-liquid separation assembly (30) through a communication pipe (55); one end of the pressure pipe (53) is located outside the water storage tank (52), the other end penetrates the top of the water storage tank (52) and the air gap below the liquid level of the water (54), and the pressure gauge (51) is connected with the pressure pipe (53) at one end outside the water storage tank (52).

8. The novel gas-liquid separation device for water electrolysis according to claim 1, characterized by: The air inlet assembly (20) comprises a diffusion pipe (23) in the form of an annular structure arranged at the bottom of the main shell (10), one side of the diffusion pipe (23) is provided with a check pipe (22) extending upwards and higher than the liquid return hole (41), the check pipe (22) is communicated with the air outlet hole of the electrolytic tank (60) through an air inlet pipe (21); a plurality of gas-liquid holes (24) are arranged on the diffusion pipe (23).

9. The novel gas-liquid separation device for water electrolysis according to claim 1, characterized by: A gas blocking plate (15) in the form of a porous plate structure is arranged between the gas-liquid hole (24) and the liquid return hole (41).

10. The novel gas-liquid separation device for water electrolysis according to claim 1, characterized by: The main shell (10) is provided with a heat dissipation device at a position corresponding to the retention cavity (16).

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