The saltwater inlet pipe of the electrolyzer is turning red; what could be the cause?
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This post was last edited by Valve Mingming on 2015-9-16 at 11:30. The saltwater pipeline leading into the electrolyzer has turned red – what causes this? Is it possible that an excessive amount of ferric chloride was used?
1. Excessive addition of ferric chloride. 2. Damage to the lining of steel-lined pipes or equipment, leading to corrosion and the release of iron ions; the problem can be resolved by analyzing the saline solution
The most likely possibility is that the anti-corrosion coating of the saltwater pipeline has been damaged
1. Since you doubt the amount of ferric chloride added, you can analyze the iron content in the secondary brine. 2. Additionally, if you suspect that an damage to the pipe lining is causing the increase in iron content, you can measure the iron content in different sections of the pipe to determine which section has an increased iron content, which will help in making a determination
1. When ferric trichloride is used as a flocculant in excessive amounts, there is an excess of reactant that proceeds to the next processing step； 2. Damage to the pipeline lining ； 3. Problems exist with adding acid ； 4. During the production of saline water, a high pH level leads to the formation of precipitates such as silicon and aluminum, resulting in a substance similar to clay ； 5. The salt used contains anti-caking agents, and iron **impurities cannot be removed during the production process. Found in the previous summary post on ion membrane production procedures
First, check whether the iron content in the secondary brine is above the limit. May I ask, do you at Haiyou use mineral salt or sea salt?
Are you the cell from the chlorine plant? Generally, the iron content is too high.
Fe ions – rust is the most likely cause. Apart from the situations mentioned above, it is recommended to check whether the material of the blind flange on the saltwater main pipe is incorrect If I’m not mistaken, is the material up to standard? Or whether a PTFE gasket is included.
From everyone’s answers, it is clear that they all agree that iron ions are the cause; I personally also tend to think it’s iron ions. As for the original poster’s question of whether it could be caused by an excessive amount of ferric chloride, ”Is this problem easy to solve? It can be determined from the analysis results of the iron ion content in the saltwater whether it is due to an excess of ferric chloride. If a pretreatment process combined with the Kay membrane technology is used, samples taken at the outlet of the pretreatment stage or at the inlet and outlet of the Kay membrane can be used for comparison. As for the reddening phenomenon in the pipeline carrying saltwater to the electrolyzer, it is not necessarily caused by ferric chloride; it could be a problem with the pipeline segment from the outlet of the resin tower to the electrolyzer.
After all this talk, has the Fe content actually been tested? There are no data; it’s all just speculation, which is meaningless. . Many people believe that adding ferric chloride will not cause an excess of iron. .
Thank you for the help. It was a pipeline issue, and it has been resolved