Method and system for improving ALK alkaline electrolyzed water performance by changing electrode material distance

Abstract

The invention provides a method and a system for changing the distance of an electrode material to improve ALK alkaline electrolyzed water performance. The method comprises the following steps: acquiring parameter data of a current alkaline electrolytic cell; determining an adjustment parameter set based on the parameter data; and according to the adjustment parameter set, the first distance adjustment device is controlled to adjust the distance of the anode material, and / or the second distance adjustment device is controlled to adjust the distance of the cathode material. According to the method and system for improving the performance of the ALK alkaline electrolyzed water by changing the distance of the electrode materials, the electrolysis efficiency is improved by changing the distance of the electrode materials under the condition that the overall structure is not changed, and the performance is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of electrolysis, and particularly relates to a method and system for improving the performance of ALK alkaline electrolyzed water by changing the distance between electrode materials. Background Art

[0002] Alkaline electrolyzed water technology was discovered earliest among electrolyzed water technologies and is currently the most mature. An alkaline electrolyzer mainly consists of a power supply, an electrolyzer box body, an electrolyte, a cathode, an anode, a diaphragm, etc. Among them, the electrolyzer box body is a container for accommodating the electrolyte, the cathode and the anode are places for electrochemical reactions, and the diaphragm is used to separate the anode chamber and the cathode chamber to prevent hydrogen and oxygen from mixing. In addition, the alkaline electrolyzer also includes components such as end pressing plates, gaskets, electrode plates, and tension bolts, and these components together ensure the sealing and stability of the electrolyzer.

[0003] Its principle can be simply described as follows: A direct current is applied between two electrodes, and the anode and cathode are separated by a diaphragm. At the anode, OH- undergoes an oxidation reaction to generate oxygen, and at the cathode, H+ is reduced to generate hydrogen. Usually, a nickel-plated steel plate with a high specific surface area or nickel-copper-iron is used as the anode catalyst, and oxides of manganese, tungsten, and ruthenium are loaded on it. A KOH or NaOH solution with a mass fraction of 30% is used as the electrolyte, and a steel material plated with a high specific surface area nickel or nickel-cobalt alloy is used as the cathode catalyst when operating at 60 degrees Celsius.

[0004] The advantages of the alkaline electrolyzer are: low material cost, high tolerance to impurities, high hydrogen production capacity, working temperature range: the working temperature of the electrolyzer is between 70 and 100 °C, voltage stack efficiency: about 62 - 82%.

[0005] Therefore, how to improve the performance of ALK alkaline electrolyzed water has always been a technical problem that needs to be urgently solved. Summary of the Invention

[0006] One of the purposes of the present invention is to provide a method and system for improving the performance of ALK alkaline electrolyzed water by changing the distance between electrode materials. Without changing the overall structure, the electrolysis efficiency is improved by changing the distance between electrode materials, so that the performance is improved.

[0007] A method for improving the performance of ALK alkaline electrolyzed water by changing the distance between electrode materials provided by an embodiment of the present invention includes:

[0008] Obtain the parameter data of the current alkaline electrolyzer;

[0009] Based on the parameter data, determine the adjustment parameter set;

[0010] According to the adjustment parameter set, control the first distance adjustment device to adjust the distance of the anode material, and / or control the second distance adjustment device to adjust the distance of the cathode material.

[0011] Preferably, based on the parameter data, determining an adjustment parameter set includes:

[0012] Performing feature extraction on the parameter data to construct a state data set;

[0013] Querying a pre-configured adjustment library with the state data set to determine the adjustment parameter set.

[0014] Preferably, the adjustment library is constructed by analyzing experimental data in advance.

[0015] Preferably, the experiments for obtaining the experimental data include:

[0016] The anode material and the cathode material are placed at a position 1.8 mm away from the separator,

[0017] or,

[0018] The anode material and the cathode material are placed at a position 0.1 mm away from the separator,

[0019] or,

[0020] The anode material is at a position 1.8 mm away from the separator and the cathode material is at a position 0.1 mm away from the separator,

[0021] or,

[0022] The anode material is at a position 0.1 mm away from the separator and the cathode material is at a position 1.8 mm away from the separator.

[0023] Preferably, the parameters of the alkaline electrolyzer are 4 * 5 cm 2 .

[0024] Preferably, the anode material includes: nickel mesh; the cathode material includes: Raney nickel; the current collector is nickel foam.

[0025] The present invention also provides a system for improving the performance of ALK alkaline electrolyzed water by changing the distance between electrode materials, including: an acquisition module, a determination module, and a control module; wherein, the acquisition module acquires the parameter data of the current alkaline electrolyzer; the determination module determines an adjustment parameter set based on the parameter data; the control module controls the first distance adjustment device to adjust the distance of the anode material and / or controls the second distance adjustment device to adjust the distance of the cathode material according to the adjustment parameter set.

[0026] Preferably, the determination module determines an adjustment parameter set based on the parameter data, including:

[0027] Performing feature extraction on the parameter data to construct a state data set;

[0028] Querying a pre-configured adjustment library with the state data set to determine the adjustment parameter set.

[0029] Preferably, the adjustment library is constructed by analyzing experimental data in advance.

[0030] Preferably, the experiments for obtaining the experimental data include:

[0031] The anode material and the cathode material are placed at a position 1.8 mm away from the separator,

[0032] or,

[0033] The anode material and the cathode material are placed at a position 0.1 mm away from the separator,

[0034] or,

[0035] The anode material is at a position 1.8 mm away from the separator, and the cathode material is at a position 0.1 mm away from the separator,

[0036] or,

[0037] The anode material is at a position 0.1 mm away from the separator, and the cathode material is at a position 1.8 mm away from the separator.

[0038] Other features and advantages of the present invention will be described in the following specification, and, in part, will become apparent from the specification, or will be understood by implementing the present invention. The objectives and other advantages of the present invention can be achieved and obtained through the structures specifically pointed out in the written specification and the drawings.

[0039] The technical solution of the present invention will be further described in detail below through the drawings and embodiments. Description of the Drawings

[0040] The drawings are used to provide a further understanding of the present invention, and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation to the present invention. In the drawings:

[0041] Figure 1 It is a schematic diagram of a method for improving the performance of ALK alkaline electrolyzed water by changing the distance between electrode materials in an embodiment of the present invention;

[0042] Figure 2 It is a schematic diagram of a commercial alkaline electrolyzer (4*5 cm 2 ) used in the present invention;

[0043] Figure 3 It is the polarization curve of the anode and cathode materials near the plate side;

[0044] Figure 4 It is the polarization curve of the anode and cathode materials near the separator side;

[0045] Figure 5 It is the polarization curve of the anode material near the plate side and the cathode material near the separator side;

[0046] Figure 6 It is the polarization curve with the anode material close to the diaphragm side and the cathode material close to the plate side;

[0047] Figure 7 It is a schematic diagram of a system for improving the performance of ALK alkaline electrolyzed water by changing the distance between electrode materials in an embodiment of the present invention. Specific embodiments

[0048] The preferred embodiments of the present invention will be described below with reference to the accompanying drawings. It should be understood that the preferred embodiments described herein are only for the purpose of illustrating and explaining the present invention, and are not used to limit the present invention.

[0049] An embodiment of the present invention provides a method for improving the performance of ALK alkaline electrolyzed water by changing the distance between electrode materials. As Figure 1 shown, it includes:

[0050] Step 1: Obtain the parameter data of the current alkaline electrolytic cell;

[0051] Step 2: Determine the adjustment parameter set based on the parameter data;

[0052] Step 3: Control the first distance adjustment device to adjust the distance of the anode material and / or control the second distance adjustment device to adjust the distance of the cathode material according to the adjustment parameter set.

[0053] Among them, determining the adjustment parameter set based on the parameter data includes:

[0054] Extract features from the parameter data to construct a state data set; the parameter data includes: electrolysis current, solution concentration, position parameters of the current anode material and cathode material, electrolysis efficiency, etc.; each characteristic parameter in the state data set includes the parameter values obtained by quantifying the average value, maximum value, fluctuation, position, etc. of each data through a pre-configured quantization rule;

[0055] Query the pre-configured adjustment library with the state data set to determine the adjustment parameter set.

[0056] In actual use, by monitoring and analyzing the parameter data of the alkaline electrolytic cell, the distance between the anode material and the cathode material is adjusted to the best; the first distance adjustment device and the second distance adjustment device can be configured as a guide rail mechanism parallel to the liquid surface and a clamping mechanism for clamping the anode material or the cathode material; the guide rail mechanism includes two parallel guide rails and a single guide rail; both ends of the single guide rail can slide on one of the parallel guide rails respectively; a platform is provided on the single guide rail, and one end of the clamping mechanism is fixedly arranged on the platform; the movement of the guide rail mechanism realizes the arbitrary movement of the anode material and the cathode material;

[0057] During the electrolysis operation, small vibrations can also be applied by controlling the anode material and the cathode material to discharge the electrolysis substances in a more efficient manner. Among them, the control of the vibrations is carried out according to a set of control parameters determined by a pre-configured control library based on parameter data. The control library is pre-analyzed and configured by professionals.

[0058] Among them, the adjustment library is pre-constructed by analyzing experimental data.

[0059] Among them, the experiments for obtaining the experimental data include:

[0060] The anode material and the cathode material are placed at a position 1.8 mm away from the diaphragm,

[0061] Or,

[0062] The anode material and the cathode material are placed at a position 0.1 mm away from the diaphragm,

[0063] Or,

[0064] The anode material is at a position 1.8 mm away from the diaphragm, and the cathode material is at a position 0.1 mm away from the diaphragm,

[0065] Or,

[0066] The anode material is at a position 0.1 mm away from the diaphragm, and the cathode material is at a position 1.8 mm away from the diaphragm.

[0067] Among them, the parameters of the alkaline electrolytic cell are 4*5 cm 2 .

[0068] Among them, the anode material includes: nickel mesh; the cathode material includes: Raney nickel; the current collector is nickel foam.

[0069] The specific configuration of the experiment is as follows:

[0070] The schematic diagram of the commercial alkaline electrolytic cell (4*5 cm 2 ) adopted in the present invention is shown in Figure 2 . The electrolytic cell includes: anode side end plate 1, anode side insulating partition 2, anode plate 3, anode and current collector 4, anode side cell frame 5, diaphragm (PPS) 6, cathode and current collector 7, cathode side cell frame 8, cathode plate 9, cathode side insulating plate 10, cathode side end plate 11, mixed cathode test solution and hydrogen outlet 12, mixed anode test solution and oxygen outlet 13, anode test solution inlet 14, and cathode test solution inlet 15; the anode material is commercial nickel mesh, the cathode material is commercial Raney nickel, and the current collector is commercial nickel foam. Preparation work: Cut nickel mesh, Raney nickel, and nickel foam with a size of (4 cm * 5 cm), and first perform Figure 2Basic installation. Then adjust the position for installation: Place the anode material and the cathode material at a position 1.8 mm away from the diaphragm as S1. Place the anode material and the cathode material at a position 0.1 mm away from the diaphragm as S2. The anode material is at a position 1.8 mm away from the diaphragm, and the cathode material is at a position 0.1 mm away from the diaphragm, as S3. The anode material is at a position 0.1 mm away from the diaphragm, and the cathode material is at a position 1.8 mm away from the diaphragm, as S4. After the electrolytic cell is installed, first install it to the test equipment and introduce 30% potassium hydroxide solution, and start the equipment to raise its temperature to 60 degrees Celsius. Connect the alligator clips of the electrochemical workstation to the anode and cathode plates of the electrolytic cell "S1" respectively to perform the performance test of the polarization curve. The polarization curve performance of "S1" is as Figure 3 shown. Connect the alligator clips of the electrochemical workstation to the anode and cathode plates of the electrolytic cell "S2" respectively to perform the performance test of the polarization curve. The polarization curve performance of "S2" is as Figure 4 shown. Connect the alligator clips of the electrochemical workstation to the anode and cathode plates of the electrolytic cell "S3" respectively to perform the performance test of the polarization curve. The polarization curve performance of "S3" is as Figure 5 shown. Connect the alligator clips of the electrochemical workstation to the anode and cathode plates of the electrolytic cell "S4" respectively to perform the performance test of the polarization curve. The polarization curve performance of "S4" is as Figure 6 shown. As Figures 3 to 6 can be seen from the performance test results of the polarization curve. The performance of the anode material and the cathode material at the end close to the electrode plate is the highest, the performance of the anode material and the cathode material at the end close to the electrode plate is the lowest, and the performance of the cathode on the side close to the electrode plate is higher than that of the anode on the side close to the electrode plate.

[0071] The present invention also provides a system for improving the performance of ALK alkaline electrolyzed water by changing the distance between electrode materials, as Figure 7 shown, including: an acquisition module 31, a determination module 32 and a control module 33; wherein, the acquisition module 31 acquires the parameter data of the current alkaline electrolytic cell; the determination module 32 determines an adjustment parameter set based on the parameter data; the control module 33 controls the first distance adjustment device to adjust the distance of the anode material and / or controls the second distance adjustment device to adjust the distance of the cathode material according to the adjustment parameter set.

[0072] Among them, the determination module determines an adjustment parameter set based on the parameter data, including:

[0073] Performing feature extraction on the parameter data to construct a state data set;

[0074] Querying the pre-configured adjustment library with the state data set to determine the adjustment parameter set.

[0075] Among them, the adjustment library is constructed by analyzing experimental data in advance.

[0076] Among them, the experiments for obtaining experimental data include:

[0077] The anode material and the cathode material are placed at a position 1.8 mm away from the separator,

[0078] or,

[0079] The anode material and the cathode material are placed at a position 0.1 mm away from the separator,

[0080] or,

[0081] The anode material is at a position 1.8 mm away from the separator, and the cathode material is at a position 0.1 mm away from the separator,

[0082] or,

[0083] The anode material is at a position 0.1 mm away from the separator, and the cathode material is at a position 1.8 mm away from the separator.

[0084] Obviously, those skilled in the art can make various changes and modifications to the present invention without departing from the spirit and scope of the present invention. Thus, if these modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalent technologies, the present invention is also intended to include these changes and modifications.

Claims

1. A method for improving the performance of alkaline electrolyzed water of ALK by changing the distance between electrode materials, characterized in that, Including: Obtain the parameter data of the current alkaline electrolyzer; Determine the adjustment parameter set based on the parameter data; According to the adjustment parameter set, control the first distance adjustment device to adjust the distance of the anode material, and / or control the second distance adjustment device to adjust the distance of the cathode material.

2. The method for improving the performance of alkaline electrolyzed water of ALK by changing the distance between electrode materials according to claim 1, characterized in that Determine the adjustment parameter set based on the parameter data, including: Extract features from the parameter data to construct a state data set; Query the pre-configured adjustment library with the state data set to determine the adjustment parameter set.

3. The method for improving the performance of alkaline electrolyzed water of ALK by changing the distance between electrode materials according to claim 2, characterized in that The adjustment library is constructed by analyzing the experimental data in advance.

4. The method for improving the performance of alkaline electrolyzed water of ALK by changing the distance between electrode materials as claimed in claim 3, characterized in that The experiments to obtain the experimental data include: The anode material and the cathode material are placed at a position 1.8 mm away from the diaphragm, or, The anode material and the cathode material are placed at a position 0.1 mm away from the diaphragm, or, The anode material is at a position 1.8 mm away from the diaphragm and the cathode material is at a position 0.1 mm away from the diaphragm, or, The anode material is at a position 0.1 mm away from the diaphragm and the cathode material is at a position 1.8 mm away from the diaphragm.

5. The method for improving the performance of alkaline electrolyzed water of ALK by changing the distance between electrode materials as claimed in claim 4, wherein, The parameters of the alkaline electrolyzer are 4*5 cm 2 .

6. The method for improving the performance of ALK alkaline electrolyzed water by changing the distance between electrode materials as claimed in claim 5, wherein The anode material includes: nickel mesh; the cathode material includes: Raney nickel; the current collector is nickel foam.

7. A system for improving the performance of ALK alkaline electrolyzed water by changing the distance between electrode materials, characterized in that, Including: An acquisition module, a determination module and a control module; wherein, the acquisition module acquires the parameter data of the current alkaline electrolyzer; The determination module determines the adjustment parameter set based on the parameter data; the control module controls the first distance adjustment device to adjust the distance of the anode material according to the adjustment parameter set, and / or controls the second distance adjustment device to adjust the distance of the cathode material.

8. The system for improving the performance of ALK alkaline electrolyzed water by changing the distance between electrode materials according to claim 7, characterized in that, The determination module determines the adjustment parameter set based on the parameter data, including: Extract features from the parameter data to construct a state data set; Query the pre-configured adjustment library with the state data set to determine the adjustment parameter set.

9. The system for improving the performance of ALK alkaline electrolyzed water by changing the distance between electrode materials according to claim 8, characterized in that, The adjustment library is constructed by analyzing the experimental data in advance.

10. The system for improving the performance of ALK alkaline electrolyzed water by changing the distance between electrode materials as claimed in claim 9, wherein, The experiments to obtain the experimental data include: The anode material and the cathode material are placed at a position 1.8 mm away from the diaphragm, or, The anode material and the cathode material are placed at a position 0.1 mm away from the diaphragm, or, The anode material is at a position 1.8 mm away from the diaphragm and the cathode material is at a position 0.1 mm away from the diaphragm, or, The anode material is at a position 0.1 mm away from the diaphragm and the cathode material is at a position 1.8 mm away from the diaphragm.

Images