Newbie’s question: In the saline pretreatment process, what consequences can occur if an excessive amount of ferric chloride is used?
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During a saltwater pretreatment process, what consequences can occur if an excessive amount of ferric chloride is used, and how can this be addressed? Newbie seeking help, thanks for the assistance.
It increases the burden on the resin column, and in severe cases, resin iron poisoning may occur, as the resin preferentially exchanges with iron ions. Saline water with a high iron content entering the electrolyzer will result in the formation of electrolytic products at the cathode, which affects factors such as cell voltage and current efficiency. It is best to keep it within the acceptable range, with the Fe level in the brine of the resin tower at ≤0.05 ppm. The raw salt we use is required to have, as much as possible, no iron-based anti-caking agents added by the manufacturer. Proper anti-corrosion treatment should be applied to the equipment pipes.
1. High consumption of ferric chloride. 2. As mentioned above, this results in uneconomical operation of the membrane