Metal evaporation equipment resistant to formic acid
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The wastewater is evaporated; it contains 5% formic acid, 1% hydrochloric acid, with the remainder being water, and the solute is sodium chloride. Since premature neutralization affects the color of sodium chloride, evaporation is used for separation first, followed by the neutralization of the wastewater and salt. Consultation: Formic acid-resistant metal materials used for manufacturing circulation pumps, evaporators, pipes, etc.
Chromium 18 nickel 9 austenitic stainless steel
Thank you. 304 stainless steel can withstand up to 5% formic acid. There is also 1% hydrochloric acid in it. Material 304 is likely not durable.
Graphite, or enamel, should work!
Furan resin impregnated graphite and glass lining definitely work. Enameled steel can be used for evaporation crystallizers, and graphite can be used as heaters, but it’s unclear what the performance will be in terms of resistance to erosion For the metal options Ta10 or C276, hook testing is considered.
904L should work; it’s expensive, but fiberglass can be used if the environmental conditions permit
Only plastic and graphite materials are mature for acid-resistant evaporators; we use plastic