Gas-liquid separation testing device and gas-liquid separation device

Abstract

The utility model discloses a gas-liquid separation testing device and a gas-liquid separation device. The testing device comprises a gas inlet pipeline, a water circulation pipeline and a three-way valve, the air inlet pipeline is connected with the water circulation pipeline through a three-way valve; wherein the water circulation pipeline comprises a water storage tank, a water outlet manual valve, a variable frequency pump, a flow meter and a water inlet manual valve; a first transparent pipe is arranged at the top of the water storage tank; the water outlet manual valve is connected with a water outlet pipeline of the water storage tank, and the water outlet manual valve and the air inlet pipeline are jointly connected with the three-way valve; the variable frequency pump, the flow meter and the water inlet manual valve are sequentially connected through a pipeline and then connected with a water inlet of the water storage tank. The device is used for testing the influence of water flow, gas flow, liquid level height and pressure on bubble separation.

Description

Technical Field

[0001] The utility model relates to the technical field of gas-liquid separation, in particular to a gas-liquid separation testing device and a gas-liquid separation device. Background Art

[0002] Hydrogen energy, as a secondary energy source that is clean, environmentally friendly, has high calorific value, good safety, and has rich application scenarios, is an ideal alternative to traditional fossil fuels and is gradually becoming one of the important carriers of global energy transformation and development.

[0003] Green hydrogen is primarily produced by water electrolysis. The process of producing hydrogen by water electrolysis consists of three main steps: production, purification, and storage. Hydrogen production: When the electrolytic cell is connected to a DC power supply and the electrolysis current reaches a certain value, the water in the cell is electrolyzed into hydrogen and oxygen. Hydrogen purification: The hydrogen generated from the cathode of the electrolysis chamber, along with the circulating alkali solution, flows through the vent holes on the cathode side of the electrode plate, through the hydrogen channel ring, and out of the left and right electrode plates, where it merges and enters the hydrogen separator. In the hydrogen separator, gravity separates the hydrogen and alkali solution. Hydrogen storage: The separated hydrogen is cooled in a hydrogen cooler. After entrained water is removed through a hydrogen droplet trap and a hydrogen water separator, it passes through a differential pressure regulating valve and enters a hydrogen dryer. The dried hydrogen enters a hydrogen storage tank. Some of the hydrogen is further compressed and liquefied into liquid hydrogen for easier transportation and storage.

[0004] Currently, mainstream water electrolysis hydrogen production technologies include alkaline water electrolysis (ALK), proton exchange membrane electrolysis (PEM), high-temperature solid oxide electrolysis (SOEC), and solid polymer anion exchange membrane electrolysis (AEM). The performance of the electrolyzer is directly related to the hydrogen production efficiency of the entire hydrogen production system and also has a significant impact on energy consumption and safety. Therefore, the electrolyzer is the core of the water electrolysis process.

[0005] In the electrolyzer test platform, the gas (with entrained water) from the anode and cathode is separated by a gas-liquid separator, and the separated liquid is returned to the electrolyzer. Therefore, the water entering the electrolyzer must be free of hydrogen and oxygen. Otherwise, the gas after electrolysis will contain other gases, resulting in a decrease in purity. This gas-liquid separator can filter out tiny bubbles in the water, ensuring that the water entering the electrolyzer is as gas-free as possible. Currently, there is no parameterized evaluation of the filtering effect of gas-liquid separation filters. Conventional methods are visual inspections to see if there are bubbles in the separated water. Utility Model Content

[0006] The technical problem to be solved by the utility model is to provide a device for parameter evaluation of gas filtering performance of a gas-liquid separation filter.

[0007] In order to solve the above technical problems, the present invention provides the following technical solutions:

[0008] A gas-liquid separation testing device includes an air intake pipeline, a water circulation pipeline and a three-way valve 30; the air intake pipeline and the water circulation pipeline are connected through the three-way valve 30; wherein, the water circulation pipeline includes a water storage tank 11, a water outlet manual valve 12, a variable frequency pump 13, a flow meter 14 and a water inlet manual valve 15; a first transparent tube 101 is provided on the top of the water storage tank 11; and the water outlet manual valve 12 is connected to the water outlet pipeline of the water storage tank 11, and is connected to the three-way valve 30 together with the air intake pipeline; the variable frequency pump 13, the flow meter 14 and the water inlet manual valve 15 are connected in sequence through pipelines and then connected to the water inlet of the water storage tank 11.

[0009] In one embodiment of the present invention, the air intake pipeline includes an air source 21 , a flow controller 22 and a check valve 23 ; the air source 21 , the flow controller 22 and the check valve 23 are sequentially connected to the three-way valve 30 through pipelines.

[0010] In one embodiment of the present invention, a first liquid level tube 102 and a temperature sensor 103 are provided in the water storage tank 11 .

[0011] The utility model also provides a gas-liquid separation device, including a gas-liquid separator 100, which is connected to the gas-liquid separation testing device described above; wherein, the three-way valve 30 is also connected to the water-gas mixing inlet of the gas-liquid separator 100; and the variable frequency pump 13 is connected to the circulating water outlet of the gas-liquid separator 100.

[0012] In one embodiment of the present invention, a second transparent tube 111 is provided between the three-way valve 30 and the water-gas mixed inlet of the gas-liquid separator 100 ; a third transparent tube 112 is provided between the variable frequency pump 13 and the circulating water outlet of the gas-liquid separator 100 .

[0013] In one embodiment of the present invention, the gas-liquid separation device includes a pressure sensor 121 and a back pressure valve 122 ; the pressure sensor 121 and the back pressure valve 122 are sequentially located on a pipeline connected to the gas outlet of the gas-liquid separator 100 .

[0014] In one embodiment of the present invention, the gas-liquid separation device includes a second liquid level pipe 130 , which is disposed on a side of the gas-liquid separator 100 .

[0015] In one embodiment of the present invention, the gas-liquid separation device includes a water supply manual valve 141 and a deionized water source 142 ; the water supply manual valve 141 and the deionized water source 142 are sequentially arranged on a pipeline connected to the water supply and drainage interface of the gas-liquid separator 100 .

[0016] In one embodiment of the present invention, the gas-liquid separation device includes a manual drain valve 150 ; the manual drain valve 150 is provided on a pipeline connected to a supply and drainage interface of the gas-liquid separator 100 .

[0017] In one embodiment of the present invention, the deionized water supply pipeline and the drainage pipeline are two branched independent pipelines connected to the supply and drainage interfaces of the gas-liquid separator 100 .

[0018] Compared with the prior art, the beneficial effect of the present invention is that according to Henry's law, the volume change of the bubbles contained in the separated liquid is calculated through the water storage tank to evaluate the gas filtering performance of the gas-liquid separator.

[0019] The utility model can test the influence of water flow, gas flow, liquid level and pressure on bubble separation, and test the limit of the separation effect of the gas-liquid separator by changing these variables.

[0020] The pressure at the rear end of the gas-liquid separator is controllable. By adjusting the back pressure valve and reading the pressure sensor at the top rear end of the gas-liquid separator, the pressure of the gas-liquid separator can be controlled. The filtration conditions under various pressure environments can be tested.

[0021] After water is added through the water supply manual valve, the internal liquid level of the gas-liquid separator is controllable and can be monitored through a transparent liquid level tube.

[0022] The amount of circulating water is controllable, and the separation effect of gas-liquid mixture under different water inlet amounts can be tested. The flow rate of inlet air is controllable, and the separation effect of gas-liquid mixture under different flow rates can be tested. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 This is a circuit connection diagram of an embodiment of the present utility model. DETAILED DESCRIPTION

[0024] In order to facilitate those skilled in the art to understand the technical solution of the present invention, the technical solution of the present invention is further described in conjunction with the accompanying drawings.

[0025] The terms "first" and "second" are used for descriptive purposes only and should not be understood to indicate or imply relative importance or implicitly specify the number of the technical features indicated. Therefore, a feature specified as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of this application, "plurality" means two or more, unless otherwise specifically defined.

[0026] See also Figure 1 As shown, this embodiment discloses a gas-liquid separation testing device, including an air intake pipeline, a water circulation pipeline and a three-way valve 30 , and the air intake pipeline and the water circulation pipeline are connected through the three-way valve 30 .

[0027] In one embodiment of the present invention, the water circulation pipeline includes a water tank 11, a manual water outlet valve 12, a variable frequency pump 13, a flow meter 14, and a manual water inlet valve 15. The manual water outlet valve 12 is connected to the water outlet pipeline of the water tank 11 and, together with the air inlet pipeline, is connected to the three-way valve 30. The variable frequency pump 13, flow meter 14, and manual water inlet valve 15 are sequentially connected through pipelines and then connected to the water inlet of the water tank 11. The flow meter 14 is used to detect the amount of circulating water. A first transparent tube 101 is provided at the top of the water tank 11 to indicate changes in the liquid level within the water tank 11. The water tank 11 is used to collect liquid separated by the gas-liquid separator 100. A first liquid level tube 102 and a temperature sensor 103 are provided in the water tank 11. The first liquid level tube 102 is used to monitor the water level within the water tank 11, and the temperature sensor 103 is used to monitor the temperature of the liquid within the water tank 11.

[0028] In one embodiment of the present invention, the air intake pipeline includes an air source 21, a flow controller 22, and a check valve 23. The air source 21, flow controller 22, and check valve 23 are sequentially connected by pipeline and then connected to a three-way valve 30. The air intake pipeline can be used to provide air for the water-air mixture and control the air intake volume. The check valve 23 prevents water from flowing back into the flow controller 22.

[0029] See also Figure 1 As shown, the present invention also provides a gas-liquid separation device, including a gas-liquid separator 100, and the gas-liquid separator 100 is connected to the gas-liquid separation test device described above. The gas-liquid separator 100 is provided with a water-gas mixing inlet, a circulating water outlet, and a water supply and drainage interface. A three-way valve 30 is also connected to the water-gas mixing inlet of the gas-liquid separator 100, and a variable frequency pump 13 is connected to the circulating water outlet of the gas-liquid separator 100. The three-way valve 30 is used to mix gas and liquid, and the mixed gas and liquid enter the gas-liquid separator 100.

[0030] In one embodiment of the present invention, a second transparent tube 111 is provided between the three-way valve 30 and the water-gas mixing inlet of the gas-liquid separator 100 for observing the gas-liquid mixing. A third transparent tube 112 is provided between the variable frequency pump 13 and the circulating water outlet of the gas-liquid separator 100 for observing whether the water after the separator contains bubbles.

[0031] In one embodiment of the present invention, the gas-liquid separation device includes a pressure sensor 121 and a back pressure valve 122. The pressure sensor 121 and the back pressure valve 122 are sequentially located on a pipeline connected to the gas outlet of the gas-liquid separator 100. The back pressure valve 122 adjusts the back pressure by reading the reading of the pressure sensor 121.

[0032] In one embodiment of the present invention, the gas-liquid separation device further includes a second liquid level pipe 130, a water replenishment manual valve 141, a deionized water source 142, and a drain manual valve 150. The second liquid level pipe 130 is located on the side of the gas-liquid separator 100 to monitor the liquid level within the gas-liquid separator 100. The water replenishment manual valve 141 and the deionized water source 142 are sequentially arranged on a pipeline connected to the replenishment and drainage interface of the gas-liquid separator 100. When the water replenishment manual valve 141 is opened, deionized water is replenished into the gas-liquid separator 100. The drain manual valve 150 is arranged on a pipeline connected to the replenishment and drainage interface of the gas-liquid separator 100. When the drain manual valve 150 is opened, the deionized water in the gas-liquid separator 100 is discharged. The deionized water replenishment pipeline and the drain pipeline are two independent branch pipelines connected to the replenishment and drainage interface of the gas-liquid separator 100.

[0033] In one embodiment of the present invention, air flows through flow controller 22, passes through check valve 23, and enters three-way valve 30. The manual water outlet valve 12 is then opened, allowing water to be replenished within gas-liquid separator 100 through three-way valve 30. The water level is monitored via second liquid level tube 130 and does not exceed the water-gas mixing inlet level. The circulating water flow rate is controlled by varying the frequency of variable frequency pump 13 and monitored by flow meter 14.

[0034] The gas and liquid are mixed through the three-way valve 30, and the water-gas mixture enters the gas-liquid separator 100 through the second transparent tube 111. After entering the gas-liquid separator 100, the gas and liquid are separated. The liquid falls to the lower layer and the gas enters the upper layer. The separation effect of the filtered water can be judged by observing the bubbles in the third transparent tube 112.

[0035] The separated liquid enters the water storage tank 11 through the variable frequency pump 13. The liquid level in the water storage tank 11 is controlled to halfway through the top closed first transparent tube 101. After a long period of operation, the water in the water storage tank 11 can basically be considered as the liquid separated by the gas-liquid separator 100. At this time, the water outlet manual valve 12 and the water inlet manual valve 15 are closed, and the entire system is closed at the same time. The liquid level height of the first transparent tube 101 is recorded. After a long period of stillness, the water storage tank 11 can be knocked during the process to allow the unfiltered bubbles in the water to be fully separated. The separated bubbles will float upward, causing the liquid level in the top first transparent tube 101 to drop. The liquid level height in the first transparent tube 101 is recorded. The water storage tank 11 is cylindrical, and the liquid volume V in the tank can be calculated. The back pressure valve 122 is connected to the top of the gas-liquid separator 100 to control the pressure inside the gas-liquid separator 100.

[0036] In one embodiment of the present invention, the measurement principle is:

[0037] According to Henry's law, the influence of gas solubility before and after standing in the water storage tank 11 is calculated. The temperature when the water outlet manual valve 12 and the water inlet manual valve 15 are closed and the temperature after standing are measured. The temperature change will cause the solubility to be different. The difference in gas solubility before and after standing can be calculated. The volume of gas dissolved in water due to the temperature drop can be obtained based on the liquid volume. The volume of the precipitated gas can be calculated by the change in the liquid level of the first transparent tube 101 at the top. This volume plus the volume of gas dissolved in water due to the temperature drop can be used to obtain the gas content after filtering. This is used to test the bubble content in the water storage tank 11 and evaluate the performance of the gas-liquid separator in filtering gas.

[0038] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the present invention can be implemented in other specific forms without departing from the spirit or essential features of the present invention. Therefore, the embodiments should be considered in all respects as illustrative and non-restrictive, and the scope of the present invention is defined by the appended claims rather than the foregoing description. It is intended that all variations within the meaning and range of equivalents of the claims be encompassed within the present invention, and any reference numerals in the claims should not be construed as limiting the claims to which they relate.

[0039] The above-mentioned embodiments only represent the implementation methods of the utility model. The protection scope of the utility model is not limited to the above-mentioned embodiments. For those skilled in the art, several modifications and improvements can be made without departing from the concept of the utility model, which all fall within the protection scope of the utility model.

Claims

1. A gas-liquid separation test device, characterized in that: The invention comprises an air intake pipeline, a water circulation pipeline and a three-way valve (30); the air intake pipeline and the water circulation pipeline are connected via the three-way valve (30); wherein the water circulation pipeline comprises a water storage tank (11), a water outlet manual valve (12), a variable frequency pump (13), a flow meter (14) and a water inlet manual valve (15); a first transparent tube (101) is provided on the top of the water storage tank (11); and the water outlet manual valve (12) is connected to the water outlet pipeline of the water storage tank (11), and is connected to the three-way valve (30) together with the air intake pipeline; the variable frequency pump (13), the flow meter (14) and the water inlet manual valve (15) are connected to the water inlet of the water storage tank (11) in sequence through pipelines.

2. The gas-liquid separation testing device according to claim 1, characterized in that: The air inlet pipeline comprises an air source (21), a flow controller (22) and a check valve (23); the air source (21), the flow controller (22) and the check valve (23) are sequentially connected through pipelines and then connected to a three-way valve (30).

3. The gas-liquid separation testing device according to claim 1, characterized in that: A first liquid level tube (102) and a temperature sensor (103) are provided in the water storage tank (11).

4. A gas-liquid separation device, characterized in that: It comprises a gas-liquid separator (100), which is connected to the gas-liquid separation test device described in any one of claims 1 to 3; wherein the three-way valve (30) is also connected to the water-gas mixing inlet of the gas-liquid separator (100); and the frequency conversion pump (13) is connected to the circulating water outlet of the gas-liquid separator (100).

5. The gas-liquid separation device according to claim 4, characterized in that: A second transparent tube (111) is provided between the three-way valve (30) and the water-gas mixing inlet of the gas-liquid separator (100); and a third transparent tube (112) is provided between the variable frequency pump (13) and the circulating water outlet of the gas-liquid separator (100).

6. The gas-liquid separation device according to claim 4, characterized in that: The gas-liquid separation device comprises a pressure sensor (121) and a back pressure valve (122); the pressure sensor (121) and the back pressure valve (122) are sequentially located on a pipeline connected to a gas outlet of the gas-liquid separator (100).

7. The gas-liquid separation device according to claim 4, characterized in that: The gas-liquid separation device comprises a second liquid level pipe (130) which is arranged on the side of the gas-liquid separator (100).

8. The gas-liquid separation device according to claim 4, characterized in that: The gas-liquid separation device comprises a water supply manual valve (141) and a deionized water source (142); the water supply manual valve (141) and the deionized water source (142) are sequentially arranged on a pipeline connected to a water supply and drainage interface of the gas-liquid separator (100).

9. The gas-liquid separation device according to claim 8, characterized in that: The gas-liquid separation device comprises a manual drainage valve (150); the manual drainage valve (150) is arranged on a pipeline connected to a drainage interface of the gas-liquid separator (100).

10. The gas-liquid separation device according to claim 9, characterized in that: The pipeline for replenishing deionized water and the drainage pipeline are two branch independent pipelines connected to the replenishment and drainage interfaces of the gas-liquid separator (100).

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