AEM and ALK electrolytic cell composite test bench

Abstract

The invention relates to an AEM and ALK electrolytic cell composite test bench, which comprises a cathode independent liquid supply unit, an anode independent liquid supply unit and a mixed unified liquid supply unit. The device has the functions of double-side independent liquid supply and mixed unified liquid supply of the anode and the cathode of the electrolyte entering the tank, can complete double-side independent liquid supply test of the AEM electrolytic tank, independent liquid supply test of the anode of the AEM electrolytic tank and double-side mixed liquid supply test of the ALK electrolytic tank, and meets the composite test of the AEM electrolytic tank and the ALK electrolytic tank.

Description

Technical Field

[0001] The present invention relates to the field of electrolyzer testing, and particularly to a composite test bench for AEM and ALK electrolyzers. Background Art

[0002] With the rapid development of the hydrogen energy industry, the types of electrolyzers on the market are mainly divided into AME, ALK, and PEM electrolyzers. At present, in the existing technology, there are specific test methods for different electrolyzers. AEM requires bilateral independent pure water or alkaline solution supply and bilateral pressure difference testing, and ALK electrolyzers require bilateral mixed alkaline solution supply and bilateral non-pressure difference testing. How to achieve the testing of AEM and ALK electrolyzers on a single test device is a difficult point in the current electrolyzer testing. Summary of the Invention

[0003] The purpose of the present invention is to provide a composite test bench for AEM and ALK electrolyzers.

[0004] The present invention realizes the above purpose through the following technical solutions: A composite test bench for AEM and ALK electrolyzers includes a cathode independent liquid supply unit, an anode independent liquid supply unit, and a mixed unified liquid supply unit; the cathode independent liquid supply unit includes an electrolyzer, a cathode gas-liquid separation tank, a cathode electrolyte independent liquid supply check valve, a cathode electrolyte independent liquid supply switch valve, a cathode electrolyte circulation pump, a cathode electrolyte flow meter, and a cathode electrolyte inlet tank check valve arranged in sequence according to the circulating flow direction of the cathode electrolyte; the anode independent liquid supply unit includes an electrolyzer, an anode gas-liquid separation tank, an anode electrolyte independent liquid supply check valve, an anode electrolyte independent liquid supply switch valve, an anode electrolyte circulation pump, an anode electrolyte flow meter, and an anode electrolyte inlet tank check valve arranged in sequence according to the circulating flow direction of the anode electrolyte; the anode gas-liquid separation tank is also connected with an anode back pressure control valve; the mixed unified liquid supply unit includes a cathode electrolyte mixed liquid supply switch valve, an anode electrolyte mixed liquid supply switch valve, an electrolyte mixing tank, an electrolyte mixing liquid supply circulation pump, a cathode electrolyte inlet tank switch valve after mixing, and an anode electrolyte inlet tank switch valve after mixing.

[0005] Further, the cathode gas-liquid separation tank is also connected with a cathode back pressure control valve.

[0006] Further, the electrolyzer is shared by the cathode independent liquid supply unit and the anode independent liquid supply unit.

[0007] Further, the cathode gas-liquid separation tank and the anode gas-liquid separation tank are connected through a cathode-anode gas-liquid separation tank connection switch valve.

[0008] Further, the electrolyte mixing tank and the electrolyte mixing liquid supply circulation pump are arranged in sequence according to the electrolyte flow direction.

[0009] Compared with the prior art, the beneficial effects of the AEM and ALK electrolyzer composite test bench of the present invention are as follows: The present invention has the functions of independent liquid supply on both the anode and cathode sides and mixed unified liquid supply of the electrolyte entering the cell, and can complete the tests of independent liquid supply on both sides of the AEM electrolyzer, independent liquid supply on the anode side of the AEM electrolyzer, and mixed liquid supply on both sides of the ALK electrolyzer, meeting the composite test of the AEM electrolyzer and the ALK electrolyzer. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] Figure 1 is a schematic structural diagram of the present invention.

[0011] The reference numerals in the figure are as follows:

[0012] 1. Cathode electrolyte independent liquid supply switch valve, 2. Cathode electrolyte mixed liquid supply switch valve, 3. Cathode electrolyte inlet valve after mixing, 4. Cathode electrolyte independent liquid supply check valve, 5. Cathode electrolyte inlet check valve, 6. Cathode electrolyte circulation pump, 7. Cathode electrolyte flow meter, 8. Cathode gas-liquid separation tank, 9. Anode electrolyte independent liquid supply switch valve, 10. Anode electrolyte mixed liquid supply switch valve, 11. Anode electrolyte inlet valve after mixing, 12. Anode electrolyte independent liquid supply check valve, 13. Anode electrolyte inlet check valve, 14. Anode electrolyte circulation pump, 15. Anode electrolyte flow meter, 16. Anode gas-liquid separation tank, 17. Electrolyte mixing tank, 18. Electrolyte mixed liquid supply circulation pump, 19. Connecting switch valve for gas-liquid separation tank of anode and cathode, 20. Cathode back pressure control valve, 21. Anode back pressure control valve, 22. Electrolyzer. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0013] Embodiment

[0014] Term introduction: The anode represents the oxygen side, the cathode represents the hydrogen side, and the anode and cathode represent both the hydrogen and oxygen sides.

[0015] An AEM and ALK electrolyzer composite test bench includes a cathode independent liquid supply unit, an anode independent liquid supply unit, and a mixed unified liquid supply unit.

[0016] Among them, the cathode independent liquid supply unit includes an electrolyzer 22, a cathode gas-liquid separation tank 8, a cathode electrolyte independent liquid supply check valve 4, a cathode electrolyte independent liquid supply switch valve 1, a cathode electrolyte circulation pump 6, a cathode electrolyte flow meter 7, and a cathode electrolyte inlet check valve 5 arranged in sequence according to the circulating flow direction of the cathode electrolyte. The cathode gas-liquid separation tank 8 is also connected to a cathode back pressure control valve 20.

[0017] The anodic independent liquid supply unit includes an electrolytic cell 22, an anodic gas-liquid separation tank 16, an anodic electrolyte independent supply check valve 12, an anodic electrolyte independent supply switch valve 9, an anodic electrolyte circulation pump 14, an anodic electrolyte flowmeter 15, and an anodic electrolyte inlet tank check valve 13, which are arranged in sequence according to the circulating flow direction of the anodic electrolyte. The anodic gas-liquid separation tank 16 is also connected with an anodic back pressure control valve 21.

[0018] Among them, the electrolytic cell 22 is shared by the cathodic independent liquid supply unit and the anodic independent liquid supply unit. The cathodic gas-liquid separation tank 8 is connected with the anodic gas-liquid separation tank 16 through a cathode-anode gas-liquid separation tank connection switch valve 19.

[0019] The mixed unified liquid supply unit includes a cathodic electrolyte mixed supply switch valve 2, an anodic electrolyte mixed supply switch valve 10, an electrolyte mixing tank 17, an electrolyte mixing supply circulation pump 18, a cathodic electrolyte post-mixing inlet tank switch valve 3, and an anodic electrolyte post-mixing inlet tank switch valve 11. The electrolyte mixing tank 17 and the electrolyte mixing supply circulation pump 18 are arranged in sequence according to the electrolyte flow direction.

[0020] Both the cathodic electrolyte mixed supply switch valve 2 and the anodic electrolyte mixed supply switch valve 10 are connected with the electrolyte mixing tank 17. The cathodic electrolyte mixed supply switch valve 2 and the anodic electrolyte mixed supply switch valve 10 are both located upstream of the electrolyte mixing tank 17 and are in parallel. The cathodic electrolyte mixed supply switch valve 2 is connected between the cathodic electrolyte independent supply check valve 4 and the cathodic electrolyte independent supply switch valve 1. The anodic electrolyte mixed supply switch valve 10 is connected between the anodic electrolyte independent supply check valve 12 and the anodic electrolyte independent supply switch valve 9.

[0021] Both the cathodic electrolyte post-mixing inlet tank switch valve 3 and the anodic electrolyte post-mixing inlet tank switch valve 11 are connected with the electrolyte mixing supply circulation pump 18. The cathodic electrolyte post-mixing inlet tank switch valve 3 and the anodic electrolyte post-mixing inlet tank switch valve 11 are both located downstream of the electrolyte mixing supply circulation pump 18 and are in parallel. The cathodic electrolyte post-mixing inlet tank switch valve 3 is connected between the cathodic electrolyte circulation pump 6 and the cathodic electrolyte flowmeter 7. The anodic electrolyte post-mixing inlet tank switch valve 11 is connected between the anodic electrolyte circulation pump 14 and the anodic electrolyte flowmeter 15.

[0022] The test method is as follows:

[0023] 1. AEM electrolyzer bilateral independent liquid supply test: The cathode electrolyte mixing liquid supply switch valve 2, the cathode electrolyte inlet valve after mixing 3, the anode electrolyte mixing liquid supply switch valve 10, and the anode electrolyte inlet valve after mixing 11 are closed, and the electrolyte mixing liquid supply circulation pump 18 is not started. The lye in the cathode gas-liquid separation tank 8 is circulated through the cathode electrolyte circulation pump 6. At this time, the cathode electrolyte independent liquid supply switch valve 1 remains open, and the cathode electrolyte flowmeter 7 measures the electrolyte circulation flow and feeds back to the cathode electrolyte circulation pump 6 for flow regulation. The lye in the anode gas-liquid separation tank 16 is circulated through the anode electrolyte circulation pump 14. At this time, the anode electrolyte independent liquid supply switch valve 9 remains open. The anode electrolyte flowmeter 15 measures the electrolyte circulation flow and feeds back to the anode electrolyte circulation pump 14 for flow regulation. The cathode and anode gas-liquid separation tank connection switch valve 19 can control the connection and disconnection between the cathode and anode gas-liquid separation tanks, and can be controlled automatically or manually during operation. The cathode back pressure control valve 20 and the anode back pressure control valve 21 at both ends can independently control the back pressure on both sides for high-pressure and pressure difference tests.

[0024] 2. AEM electrolyzer anode independent liquid supply test: The cathode electrolyte mixing liquid supply switch valve 2, the cathode electrolyte inlet valve after mixing 3, the anode electrolyte mixing liquid supply switch valve 10, and the anode electrolyte inlet valve after mixing 11 are closed, and the electrolyte mixing liquid supply circulation pump 18 is not started. The cathode electrolyte circulation pump 6 is not started. At this time, the cathode electrolyte independent liquid supply switch valve 1 remains closed. The lye in the anode gas-liquid separation tank 16 is circulated through the anode electrolyte circulation pump 14. At this time, the anode electrolyte independent liquid supply switch valve 9 remains open. The anode electrolyte flowmeter 15 measures the electrolyte circulation flow and feeds back to the anode electrolyte circulation pump 14 for flow regulation. The cathode and anode gas-liquid separation tank connection switch valve 19 is closed to cut off the connection between the cathode and anode gas-liquid separation tanks. The cathode back pressure control valve 20 and the anode back pressure control valve 21 at both ends can independently control the back pressure on both sides for high-pressure and pressure difference tests.

[0025] 3. Double-sided mixed liquid supply test of ALK electrolyzer: The independent liquid supply switch valves 1 for cathode electrolyte and 9 for anode electrolyte are closed, and the cathode electrolyte circulation pump 6 and the anode electrolyte circulation pump 14 are not started. The mixed liquid supply switch valve 2 for cathode electrolyte, the switch valve 3 for cathode electrolyte to enter the cell after mixing, the mixed liquid supply switch valve 10 for anode electrolyte, and the switch valve 11 for anode electrolyte to enter the cell after mixing are opened. The alkali liquid in the cathode gas-liquid separation tank 8 and the alkali liquid in the anode gas-liquid separation tank 16 are circulated through the electrolyte mixed liquid supply circulation pump 18. The electrolyte mixing tank 17 can mix the alkali liquids on both sides during this process to adjust the alkali liquid concentration. The two alkali liquid flow meters, namely the cathode electrolyte flow meter 7 and the anode electrolyte flow meter 15, can feedback the flow signals to the electrolyte mixed liquid supply circulation pump 18 in real time. At this time, the connection switch valve 19 between the cathode and anode gas-liquid separation tanks is opened to connect the two gas-liquid separation tanks. The back pressure control valves 20 for the cathode and 21 for the anode at the rear control the liquid level difference and pressure difference between the two gas-liquid separation tanks respectively.

[0026] The present invention has the functions of independent liquid supply for both the cathode and anode of the electrolyte entering the cell and mixed unified liquid supply, and can complete the double-sided independent liquid supply test of the AEM electrolyzer, the anode independent liquid supply test of the AEM electrolyzer, and the double-sided mixed liquid supply test of the ALK electrolyzer, meeting the composite test of the AEM electrolyzer and the ALK electrolyzer.

[0027] The above are only some embodiments of the present invention. For those of ordinary skill in the art, without departing from the inventive concept of the present invention, several modifications and improvements can still be made, and these all belong to the protection scope of the present invention.

Claims

1. A composite test bench for AEM and ALK electrolyzers, characterized in that: It includes a cathode independent liquid supply unit, an anode independent liquid supply unit and a mixed unified liquid supply unit; the cathode independent liquid supply unit includes an electrolytic cell, a cathode gas-liquid separation tank, a cathode electrolyte independent liquid supply check valve, a cathode electrolyte independent liquid supply switch valve, a cathode electrolyte circulation pump, a cathode electrolyte flowmeter, and a cathode electrolyte inlet check valve arranged in sequence according to the circulation flow direction of the anode electrolyte; the anode independent liquid supply unit includes an electrolytic cell, an anode gas-liquid separation tank, an anode electrolyte independent liquid supply check valve, an anode electrolyte independent liquid supply switch valve, an anode electrolyte circulation pump, an anode electrolyte flowmeter, and an anode electrolyte inlet check valve arranged in sequence according to the circulation flow direction of the anode electrolyte; the anode gas-liquid separation tank is also connected to an anode back pressure control valve; the mixed unified liquid supply unit includes a cathode electrolyte mixed liquid supply switch valve, an anode electrolyte mixed liquid supply switch valve, an electrolyte mixing tank, an electrolyte mixed liquid supply circulation pump, a cathode electrolyte mixed inlet switch valve and an anode electrolyte mixed inlet switch valve.

2. The AEM and ALK electrolytic cell composite test bench according to claim 1, characterized in that: The cathode gas-liquid separation tank is also connected to a cathode back pressure control valve.

3. The AEM and ALK electrolytic cell composite test bench according to claim 1, characterized in that: The electrolytic cell is shared by the cathode independent liquid supply unit and the anode independent liquid supply unit.

4. The AEM and ALK electrolytic cell composite test bench according to claim 1, characterized in that: The cathode gas-liquid separation tank and the anode gas-liquid separation tank are connected via a cathode and anode gas-liquid separation tank connecting switch valve.

5. The AEM and ALK electrolytic cell composite test bench according to claim 1, characterized in that: The electrolyte mixing tank and the electrolyte mixing liquid supply circulation pump are arranged in sequence according to the flow direction of the electrolyte.

Images