Material selection for heat exchangers
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For media with a Cl ion content of over 5% and a temperature of ≤160°C, what material is suitable?
I don’t know what medium it is; how should I choose the material?
At this temperature, it is likely the heat exchanger or the reactor. Heat exchangers: Graphite and enamel heat exchangers can be used ； Reactor vessel: Epoxy coating can be used.
This post was last edited by LeWuHen1 on 2009-6-6 at 23:14. Q345 is acceptable; for a better option, composite panels can be considered as they’re more cost-effective.
It should be specified which salts produce the CL radicals, as different salts require different materials. Based solely on this condition, given its high temperature, I believe that ordinary titanium or other stainless steels cannot be used; instead, a titanium-palladium alloy or Hastelloy should be employed.
Graphite is cheap; if you have plenty of money, you can consider silicon carbide
This post was last edited by Wang Genrong on 2009-6-7 at 16:12; graphite heat exchangers should be the preferred choice. The thermal conductivity of graphite is three times that of stainless steel, and it exhibits excellent corrosion resistance to hydrochloric acid; it can be used for extended periods at the boiling point of hydrochloric acid of any concentration without suffering from corrosion ； The price is lower than that of titanium and comparable to that of stainless steel. Please contact us for further communication.