How to reduce the alkali concentration in the electrolyzer over time
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During the operation of the electrolyzer, are there any good solutions if the alkali concentration exceeds the specified level?
Don’t you control the alkali concentration by not adding pure water?
Add pure water, but in the later stages the flow rate of pure water will keep increasing, so improvements will be made from other aspects.
What other methods are there besides adding pure water?
It’s likely that you didn’t add enough water, which created a vicious cycle: since the concentration of alkali entering is high, the concentration coming out will be even higher, and this cycle continues, so more and more water has to be added
More water means higher yield – isn’t that great?
Why does the concentration keep increasing over time in the electrolyzer?
According to the process design and related interlock designs, the system should be able to adjust itself under such conditions during operation, provided that the interlocks and related pneumatic valves are functioning properly. Personally, I think, as paul2100 said, there is a problem with the addition of pure water. During the production process, the amount of pure water added is adjusted according to the current in the electrolytic cell, following a y=kx relationship. The value of k is around 0.1088. Then it’s possible that the coefficient setting is too low ； Or it’s interlocking; there’s a problem with the valve. This is just my personal opinion; I welcome everyone’s corrections and discussions.
In the design, the flow rate of the pure water pump should be sufficient to meet the requirements of operation under maximum load, unless there are design flaws. Wouldn’t it be good to add water to it and sell it as caustic soda?
In an ion-exchange membrane cell, pure water is added directly; isn’t it better to add more of it so as to increase production? It’s not as if high alkali concentration in the diaphragm tank makes it difficult to reduce it later on