Small electrolytic bath for hydrogen production test for testing potential and service life of electrode

Abstract

The utility model relates to a hydrogen production test small electrolytic bath for testing potential and service life of an electrode, which belongs to the field of membrane polar distance membrane electrolytic baths and comprises an electrolytic bath and an electrolytic bath frame, the electrolytic bath is fixedly arranged on the electrolytic bath frame and connected with an electrolyte circulating system, and the electrolyte circulating system is connected with the electrolytic bath frame. The electrolyte circulating system realizes feeding and discharging of electrolyte in the electrolytic bath, the electrolytic bath comprises two conductive copper plates which are distributed front and back at an interval, a plurality of electrolysis units are arranged between the two conductive copper plates and are distributed from front to back, the two conductive copper plates are fixed in a bolted mode, and the two conductive copper plates are fixed in a bolted mode. According to the utility model, through different cathode and anode electrode combinations, the electrode performance is comprehensively judged; the test sample size is large, a plurality of sample experiments can be simultaneously carried out according to the number of the test electrolysis units, and the test conditions can be changed at any time to carry out omnibearing tests; real production conditions can better reflect actual conditions; long-term electrolysis test; the size is small, dismounting is convenient, and test cost is reduced.

Description

Technical Field

[0001] The utility model relates to a small hydrogen production test cell for testing electrode potential and life, belonging to the field of membrane-electrode distance ion membrane electrolyzers. Background Art

[0002] With the development of the global hydrogen industry, demand for artificial hydrogen production has exploded. Among all artificial hydrogen production methods, water electrolysis can effectively absorb unstable power from wind and photovoltaic power generation, as well as other surplus off-peak power. Hydrogen production by electrolysis falls within the field of electrochemical applications, and currently, green electricity electrolysis is the most common method. This involves using various green electricity sources in hydrogen production electrolyzers to electrolyze potassium-alkali water to produce hydrogen and oxygen.

[0003] Cathode electrode reaction 2H2O + 2e － =H2↑+2OH －

[0004] Anode electrode reaction 4OH － -4e － =O2↑+2H2O

[0005] The electrolyzer is the core equipment in the electrolytic hydrogen production industry. In hydrogen electrolysis production, electricity accounts for the main cost. For every standard cubic meter of hydrogen produced, the DC power consumption is about 4 kWh. The main factors affecting power consumption are:

[0006] 1. Structure and materials of electrolytic cell;

[0007] 2. Hydrogen evolution potential of the cathode electrode;

[0008] 3. Oxygen evolution potential of the anode electrode;

[0009] Selecting appropriate electrolytic cell structure and materials, reducing the hydrogen evolution potential of the electrode grid and active coating, reducing the oxygen evolution potential, and improving the electrode life have become the requirements of technological leadership. In terms of the determination of electrode potential and electrode life, the salt bridge method and weight loss method are mainly used, which have the following disadvantages:

[0010] 1. The conductive liquid of the salt bridge method also has a potential drop;

[0011] 2. The weight loss method only simulates the production environment, not the actual production;

[0012] 3. Enhanced life testing also deviates from the actual production environment.

[0013] Therefore, there is a need for a small hydrogen production test cell for testing electrode potential and life, so as to realize the measurement in actual production. Summary of the Invention

[0014] The technical problem to be solved by the utility model is: in order to overcome the deficiencies of the prior art, a small hydrogen production test cell for testing electrode potential and life span is provided, which can be used for carrying out measurements in actual production.

[0015] The technical solution adopted by the utility model to solve the above-mentioned problems is as follows: a small hydrogen production test cell for testing electrode potential and life, comprising an electrolytic cell and a cell frame, wherein the electrolytic cell is fixedly arranged on the cell frame, the electrolytic cell is connected to an electrolyte circulation system, and the electrolyte circulation system realizes the inflow and outflow of electrolyte in the electrolytic cell, the electrolytic cell comprises two conductive copper plates spaced apart from each other, a plurality of electrolytic units are arranged between the two conductive copper plates, the plurality of electrolytic units are distributed from front to back, the two conductive copper plates are bolted and fixed, an insulator is arranged between two adjacent electrolytic units, the conductive copper plates and the electrolytic units are clamped by the two conductive copper plates to achieve relative fixation, the electrolytic units are connected to a power supply through the conductive copper plates to enable the electrolytic units to work and achieve electrolysis;

[0016] The front side of the front conductive copper plate abuts against the battery tank frame, and the rear side of the rear conductive copper plate generates a forward thrust through the ejector rod;

[0017] The specific number of the push rods is two, the push rods are threadedly connected to the battery tank frame, and the push rods are parallel to the front-to-back direction;

[0018] A rotating disk is coaxially fixed on each of the two top rods, and a moving rod is provided between the two top rods. The moving rod is parallel to the top rod and is threadedly connected to the electric slot frame. A positioning plate is fixed on the front end of the moving rod. The positioning plate is perpendicular to the moving rod, and the rear sides of the two adjacent rotating disks are both in contact with the front side of the positioning plate.

[0019] Preferably, the conductive copper plate includes a conducting portion and two insulating portions, the two insulating portions are respectively located on both sides of the conducting portion, and the top rod, the electrolysis unit and the cell frame are all in contact with the insulating portions.

[0020] Preferably, the electrolysis unit comprises an anode electrode and a cathode electrode distributed front to back, and an ion membrane arranged between the anode electrode and the cathode electrode, and both the anode electrode and the cathode electrode are provided with a coating.

[0021] Preferably, the coating material is platinum ruthenium iridium.

[0022] Preferably, the electrolyte circulation system includes a liquid inlet main pipe, a liquid outlet main pipe, multiple liquid inlet hoses and multiple liquid outlet hoses. The liquid inlet main pipe and the liquid inlet main pipe are fixedly arranged on the electrolytic tank rack. The multiple liquid inlet hoses and the multiple liquid outlet hoses correspond one-to-one to multiple electrolytic units. The liquid inlet end of the electrolytic unit is connected to the liquid inlet main pipe through the liquid inlet hose, and the liquid outlet end of the electrolytic unit is connected to the liquid outlet main pipe through the liquid outlet hose.

[0023] Preferably, the length of the liquid inlet hose is 1000 mm, and the length of the liquid outlet hose is 600 mm.

[0024] Preferably, the electrolyte circulation system is provided with two groups, and the two groups of electrolyte circulation systems are arranged symmetrically on the left and right.

[0025] Preferably, the moving rod and the positioning plate are an integrally formed structure.

[0026] Preferably, the effective electrolysis area of ​​the electrolysis unit is 12cm´24cm.

[0027] Preferably, the electrolytic cell is provided with a plurality of sampling points and a plurality of windows.

[0028] Compared with the prior art, the advantages of the present invention are:

[0029] 1. Comprehensively judge the electrode performance through different combinations of anode and cathode electrodes;

[0030] 2. The test sample volume is large. Multiple sample experiments can be carried out simultaneously according to the number of test electrolysis units. The experimental conditions can be changed at any time to conduct all-round testing.

[0031] 3. Real production conditions can better reflect the actual situation;

[0032] 4. Long-term electrolysis test;

[0033] 5. Small size, easy disassembly and assembly, reducing test costs;

[0034] 6. By simultaneously fitting the two rotating disks to the positioning plate, the thrusts exerted by the two push rods on the electrolytic cell are ensured to be consistent, thus avoiding uneven force on the electrolytic cell and affecting the sealing of the anode electrode and cathode electrode to the ion membrane. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] Figure 1 This is a front view of a small hydrogen production test cell for testing electrode potential and life in the utility model;

[0036] Figure 2 Schematic diagram of the connection structure between the electrolytic cell and the cell frame.

[0037] in:

[0038] Electrolytic cell 1, cell frame 2, electrolyte circulation system 3, ejector rod 4, rotating disk 5, moving rod 6, positioning plate 7;

[0039] Conductive copper plate 11, electrolytic unit 12, insulator 13;

[0040] Current-carrying portion 111, insulating portion 112;

[0041] Anode electrode 121, cathode electrode 122, ion membrane 123;

[0042] Liquid inlet main pipe 31, liquid outlet main pipe 32, liquid inlet hose 33, liquid outlet hose 34. DETAILED DESCRIPTION

[0043] like Figure 1-2 As shown, in this embodiment, a small hydrogen production test cell for testing electrode potential and life includes an electrolytic cell 1 and a cell frame 2. The electrolytic cell 1 is fixedly arranged on the cell frame 2. The electrolytic cell 1 is used to produce hydrogen. Two sets of electrolyte circulation systems 3 are connected to the electrolytic cell 1. The two sets of electrolyte circulation systems 3 are arranged symmetrically on the left and right. The electrolyte circulation systems 3 realize the inlet and outlet of the electrolyte in the electrolytic cell 1. The effective electrolysis area of ​​the electrolysis unit 12 is 12 cm x 24 cm.

[0044] The electrolytic cell 1 includes two conductive copper plates 11 spaced apart from each other, a plurality of electrolytic units 12 disposed between the two conductive copper plates 11, and the plurality of electrolytic units 12 are distributed from front to back. The two conductive copper plates 11 are bolted together, and an insulator 13 is disposed between two adjacent electrolytic units 12. The conductive copper plates 11 clamp the electrolytic units 12 and the insulators 13 to achieve relative fixation between the conductive copper plates 11 and the electrolytic units 12. The electrolytic units 12 are connected to a power source via the conductive copper plates 11 to operate and perform electrolysis.

[0045] The front side of the front conductive copper plate 11 is against the cell frame 2, and the rear side of the rear conductive copper plate 11 generates a forward thrust through the push rod 4, thereby achieving the effect of fixing the electrolytic cell 1 on the cell frame 2, wherein the specific number of the push rods 4 is two, and the push rods 4 are threadedly connected to the cell frame 2, and the push rods 4 are parallel to the front-to-back direction;

[0046] The conductive copper plate 11 includes a conducting portion 111 and two insulating portions 112. The two insulating portions 112 are located on both sides of the conducting portion 111. The top rod 4, the electrolysis unit 12 and the battery tank frame 2 are all in contact with the insulating portions 112.

[0047] The electrolysis unit 12 includes an anode electrode 121 and a cathode electrode 122 distributed front to back, and an ion membrane 123 disposed between the anode electrode 121 and the cathode electrode 122. The anode electrode 121 and the cathode electrode 122 are both provided with a coating made of platinum ruthenium iridium. By rotating the push rod 4, the gap between the anode electrode 121 and the cathode electrode 122 is reduced, and the ion membrane 123 is sealed and enclosed by the anode electrode 121 and the cathode electrode 122.

[0048] The electrolyte circulation system 3 includes an oil inlet manifold 31, a liquid outlet manifold 32, a plurality of liquid inlet hoses 33, and a plurality of liquid outlet hoses 34. The oil inlet manifold 31 and the oil inlet manifold 31 are fixedly arranged on the battery rack 2. The plurality of liquid inlet hoses 33 and the plurality of liquid outlet hoses 34 correspond to the plurality of electrolysis units 12 one by one. The liquid inlet end of the electrolysis unit 12 is connected to the oil inlet manifold 31 through the liquid inlet hose 33, and the liquid outlet end of the electrolysis unit 12 is connected to the liquid outlet manifold 32 through the liquid outlet hose 34. The length of the liquid inlet hose 33 is 1000 mm, and the length of the liquid outlet hose 34 is 600 mm.

[0049] During operation, the electrolyte enters the oil inlet manifold 31 and then enters the electrolysis unit 12 through the liquid inlet hose 33 for electrolysis. The electrolyte in the electrolysis unit 12 is then transported to the liquid outlet manifold 32 through the liquid outlet hose 34.

[0050] In addition, in fact, the electrolytic cell 1 is provided with multiple sampling points and multiple windows, through which the electrochemical reaction inside the electrolytic cell 1 can be observed. By sampling and analyzing the composition, concentration and other data of the electrolyte at each set point, the electrode life can be judged according to the actual production electrode weight loss or coating content change;

[0051] The two levers 4 are coaxially fixed with a rotating disk 5, and a moving rod 6 is provided between the two levers 4, and the moving rod 6 is parallel to the lever 4, and the moving rod 6 is threadedly connected to the cell frame 2. The front end of the moving rod 6 is fixedly provided with a positioning plate 7, and the positioning plate 7 is perpendicular to the moving rod 6. The rear sides of the two adjacent rotating disks 5 are in contact with the front sides of the positioning plates 7 during the fixation of the electrolytic cell 1. After the positioning plate 7 is in contact with one of the two rotating disks 5, the lever 4 connected to the other rotating disk 5 is rotated so that the secondary rotating disk 5 is also in contact with the positioning plate 7. In this way, the thrust generated by the two levers 4 on the electrolytic cell 1 is consistent, so as to avoid uneven force on the electrolytic cell 1 and affect the sealing performance of the anode electrode 121 and the cathode electrode 122 on the ion membrane 123.

[0052] The moving rod 6 and the positioning plate 7 are an integrally formed structure;

[0053] In summary, the small hydrogen production test cell used to test electrode potential and life has the following characteristics:

[0054] 1. Comprehensively judge the electrode performance by using different combinations of anode and cathode electrodes 121;

[0055] 2. The test sample volume is large. According to the number of test electrolysis units 12, multiple sample experiments can be carried out at the same time, and the experimental conditions can be changed at any time to conduct a full range of tests;

[0056] 3. Real production conditions can better reflect the actual situation;

[0057] 4. Long-term electrolysis test;

[0058] 5. Small size, easy disassembly and assembly, reducing test costs;

[0059] 6. By simultaneously fitting the two rotating disks 5 to the positioning plate 7, the thrusts generated by the two push rods 4 on the electrolytic cell 1 are ensured to be consistent, thereby preventing uneven force on the electrolytic cell 1 from affecting the sealing of the anode electrode 121 and the cathode electrode 122 on the ion membrane 123.

[0060] In addition to the above embodiments, the present invention also includes other implementation methods. Any technical solutions formed by equivalent transformation or equivalent replacement should fall within the scope of protection of the claims of the present invention.

Claims

1. A small electrolytic cell for hydrogen production test for testing electrode potential and life, comprising an electrolytic cell (1) and an electrolytic cell frame (2), wherein the electrolytic cell (1) is fixedly arranged on the electrolytic cell frame (2), and an electrolyte circulation system (3) is connected to the electrolytic cell (1), wherein the electrolyte circulation system (3) realizes the inflow and outflow of electrolyte in the electrolytic cell (1), and is characterized in that: The electrolytic cell (1) comprises two conductive copper plates (11) spaced apart from each other in a front-to-back manner, a plurality of electrolytic units (12) being arranged between the two conductive copper plates (11), the plurality of electrolytic units (12) being arranged from front to back, the two conductive copper plates (11) being bolted and fixed, an insulator (13) being arranged between two adjacent electrolytic units (12), the conductive copper plates (11) and the electrolytic units (12) being relatively fixed by clamping the electrolytic units (12) and the insulators (13) by the two conductive copper plates (11), and the electrolytic units (12) being connected to a power source through the conductive copper plates (11) so that the electrolytic units (12) are operated to achieve electrolysis; The front side of the front conductive copper plate (11) abuts against the electric tank frame (2), and the rear side of the rear conductive copper plate (11) generates a forward thrust through the top rod (4); The specific number of the push rods (4) is two, the push rods (4) are threadedly connected to the battery tank frame (2), and the push rods (4) are parallel to the front-back direction; A rotating disk (5) is coaxially fixed on each of the two top rods (4), a moving rod (6) is provided between the two top rods (4), the moving rod (6) is parallel to the top rod (4), the moving rod (6) is threadedly connected to the electric tank frame (2), a positioning plate (7) is fixed at the front end of the moving rod (6), the positioning plate (7) is perpendicular to the moving rod (6), and the rear sides of the two adjacent rotating disks (5) are both in contact with the front side of the positioning plate (7).

2. A small hydrogen production test cell for testing electrode potential and life according to claim 1, characterized in that: The conductive copper plate (11) comprises a conducting portion (111) and two insulating portions (112), the two insulating portions (112) being located on both sides of the conducting portion (111), respectively, and the top rod (4), the electrolysis unit (12) and the battery tank frame (2) all being in contact with the insulating portions (112).

3. A small hydrogen production test cell for testing electrode potential and life according to claim 1, characterized in that: The electrolysis unit (12) comprises an anode electrode (121) and a cathode electrode (122) distributed front to back, and an ion membrane (123) arranged between the anode electrode (121) and the cathode electrode (122), wherein both the anode electrode (121) and the cathode electrode (122) are provided with a coating.

4. A small hydrogen production test cell for testing electrode potential and life according to claim 3, characterized in that: The coating material is platinum ruthenium iridium.

5. The small hydrogen production test cell for testing electrode potential and life according to claim 1, characterized in that: The electrolyte circulation system (3) comprises an oil inlet main pipe (31), a liquid outlet main pipe (32), a plurality of liquid inlet hoses (33) and a plurality of liquid outlet hoses (34). The oil inlet main pipe (31) and the oil inlet main pipe (31) are both fixedly arranged on the electrolytic tank frame (2). The plurality of liquid inlet hoses (33) and the plurality of liquid outlet hoses (34) correspond one-to-one to the plurality of electrolytic units (12). The liquid inlet ends of the electrolytic units (12) are connected to the oil inlet main pipe (31) via the liquid inlet hoses (33), and the liquid outlet ends of the electrolytic units (12) are connected to the liquid outlet main pipe (32) via the liquid outlet hoses (34).

6. A small hydrogen production test cell for testing electrode potential and life according to claim 5, characterized in that: The length of the liquid inlet hose (33) is 1000 mm, and the length of the liquid outlet hose (34) is 600 mm.

7. A small hydrogen production test cell for testing electrode potential and life according to any one of claims 1, 5, and 6, characterized in that: The electrolyte circulation system (3) is provided with two groups, and the two groups of electrolyte circulation systems (3) are arranged symmetrically on the left and right.

8. The small hydrogen production test cell for testing electrode potential and life according to claim 1, characterized in that: The moving rod (6) and the positioning plate (7) are an integrally formed structure.

9. The small hydrogen production test cell for testing electrode potential and life according to claim 1, characterized in that: The effective electrolysis area of ​​the electrolysis unit (12) is 12 cm x 24 cm.

10. The small hydrogen production test cell for testing electrode potential and life according to claim 1, characterized in that: The electrolytic cell (1) is provided with a plurality of sampling points and a plurality of viewing windows.

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