The evaporation plates used for 50% caustic soda are constantly getting perforated – what should be done to address this issue, and what are the optimization measures?
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This post was last edited by sunjl1981 on 2013-1-6 23:32. Why do the plate heat exchangers used for evaporating 50% NaOH in our factory keep getting perforated? What’s going on? I hope the seniors can give me some advice! ! ! # + + .
What is the temperature of 50% NaOH? What is the material of plate heat exchangers? It wasn’t explained clearly, so it’s hard to explain. It is likely due to high temperatures, an inappropriate choice of material for the heat exchanger; or perhaps the material was chosen correctly, but the product purchased was of poor quality.
Reply to 2# Yienuo Zhang: We keep the temperature between 141 and 142 degrees, and the material used is nickel.
With what does the base exchange heat? Could you provide a detailed explanation?
Then use a tube-type exchanger; when the material contains suspended particles, a tube-type heat exchanger is generally employed
Check the material; it seems the purity level is not high enough
I’m willing to discuss with you the reasons for leaks in nickel heat exchangers; we have encountered such issues several times as well. I hope you can provide as detailed an introduction as possible.
For 50 caustic, plate heat exchangers can also be used. There are many different types of nickel materials available. I suspect that the chloride content in your 50 caustic is too high; not to mention heat exchangers, I’ve seen many evaporators that are severely corroded. It is recommended to analyze whether the chloride content in the caustic exceeds the allowed limits
Reply 4# renzongkai Heat exchange competition with water
Reply to 10# Di Xu: Is heat exchange taking place with the circulating water? Scaling is quite severe on the circulating water side; corrosion occurs there as well. There are green spots similar to rust on the circulating water side, and the plates on that side appear black.