The pH value of the brackish water at the electrolyzer outlet varies within the range of 2.02–3.59. What could be the possible causes?
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I would like to ask: when two electrolysis resin towers are in operation with one tower being regenerated and the equipment switched over, the pH value of the brackish water at the outlet of the electrolyzer fluctuates within the range of 2.02–3.59. What could be the possible causes for this? Colleagues, have you ever encountered such a situation? Liquid chlorine production discussion group
Take a look to see if this matches what you described. Reasons for abnormalities in the pH value of the dilute brine in the electrolyzer, and corresponding measures: 1. Excessive or insufficient acid addition – adjust the flow rate. 2. Changes in acid concentration or substandard quality – adjust the flow rate after analysis. 3. Changes in the flow rate of pure water used for adding acid – adjust the amount of acid promptly. 4. Changes in the flow rate of the circulating brine – adjust the amount of acid promptly. 5. Changes in the flow rate of the concentrated brine fed into the electrolyzer – adjust the amount of acid promptly. 6. Fluctuations in the pH value of the concentrated brine fed into the electrolyzer – adjust the amount of acid promptly. 7. Too rapid changes in current level – adjust the amount of acid promptly. 8. Membrane leakage – stop operation and replace the membrane. 9. During initial startup – adjust the amount of acid promptly. 10. Incorrect readings from instruments – calibrate the instruments
@Valve Ming has changed careers and started learning *technology
I posted on behalf of someone else; I haven’t changed careers
Unless there are problems with the regeneration process that lead to quality issues with the brine, the pH of the fresh brine exiting the system is typically between 3 and 5.
The pH fluctuations in the electrolyte cell after resin replacement indicate that internal leakage in the valves of the resin tower’s regeneration channel is the cause
Sampling and analysis at the resin tower outlet, sampling and analysis in the refined brine tank
Which company’s process is electrolysis? It may be caused by pressure fluctuations in the pure water and hydrochloric acid pipelines resulting from the switching of the resin tower. In the processes used by Kitakata Kikai and Asahi Kasei, the water pipeline for regenerating the resin tower and the water pipeline for mixing acid in the electrolyzer are connected to the same main pipeline. The resin tower requires a large amount of water temporarily and on an intermittent basis; each time it is used, this results in insufficient pressure at the point where water is added to the acid in the electrolyzer, leading to unstable concentrations of the acid. You can observe whether the fluctuations in the pure water supply used for mixing acids when it enters the resin tower, as well as the fluctuations in the acid flow rate, correspond to the curve of pH changes. If they do correspond, such fluctuations are still difficult to eliminate
Did this happen after the resin tower was put into operation? It was discussed earlier; the poster can search for a relevant post!