If the electrolyzer is shut down without draining the liquid, how should the ion concentration of the electrolyte be controlled?
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This post was last edited by sunjl1981 on 2013-1-6 20:21. If the electrolyzer is not drained after shutdown, how should the ion concentrations in the cathode and anode solutions be controlled? Should the ion concentration in the catholyte be higher than that in the anolyte, or the opposite? What is the reason for this? Does the ion concentration referred to mean the molar concentration of sodium ions? In my opinion, it is necessary to maintain an ion concentration in the catholyte – that is, the sodium ion concentration – that is higher than that in the anolyte; this prevents water molecules from migrating from the cathode to the anode, which could otherwise cause the ion membrane to delaminate and form bubbles I’m not sure if my understanding is correct; I hope everyone can help clarify it! ! # ， ， &
Ours are Woody electrolytic cells, and there are strict regulations regarding the situation mentioned by the original poster: generally, the operation time should not exceed 8 hours, otherwise drainage is required. However, after six years of operation so far, it is common to drain the liquid when the cycle is stopped for an extended period of time. Ensure the good condition of the cell and the normal operation of the membrane.
The analyses upstairs are all good, but over a long period of time, the concentration of the catholyte will decrease, and the decrease will be significant.
For chlorine production electrolyzers, it is required that if no maintenance is carried out after shutdown, the electrolyte be stored within the electrolyzer – that is, the liquid should not be drained and remain stored inside the electrolyzer!