The electrolyzer feed brine pipe is red
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This post was last edited by sunjl1981 on 2013-1-6 23:59 What is the reason for the redness of the electrolytic cell feed brine pipe? # , , &
I suspect there is too much Feˇ3. It may be due to the peeling off of the pipe lining or other reasons.
The main reason for the redness of the electrolytic cell feed brine pipe is the deposition of iron ions.
The main reason is that your primary brine adopts the air flotation + microfiltration process, which requires the addition of coagulant, ferric chloride, brine pH 9-11, and ferric hydroxide (PH 3-4), which is easy to adhere to the inner walls of pipes and equipment and turn red. If you open the anode side of the ion membrane for inspection, you will also find this phenomenon. Therefore, you must control the amount of iron salt added during air flotation, and the floating mud will be slightly red. Of course, it also depends on your clarification effect. If you are using an Asahi Kasei tank, it is recommended that you take a look at the rotor of the PHRCA-314 on-site flow meter. Is it red?
If it is a problem with primary salt water, it must be a problem with FE salt. The formation of ferric chloride as a flocculant is the most likely.
Causes of red pipes: 1. Ferric chloride is used as a flocculant. If the amount is too large, there will be room for reaction and the process will proceed to the next step. ； 2. Pipe lining damage ； 3. There are problems with adding acid ； 4. During the production process of primary brine, the pH is too high, and silicon, aluminum, etc. are produced to form precipitates, which are similar to clay. ； 5. The salt used contains anti-caking agents, and iron cyanide cannot be removed during the production process.