What material is used for the plate dilute acid cooler of the foam tower?
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The dilute acid cooler of the foam tower of our small sulfuric acid plant originally used a polypropylene graphite-impregnated tube heat exchanger. Now we want to switch to a plate heat exchanger. The dilute acid concentration is not higher than 10%. Can you please give us some advice on what material should be used? Thanks!
The commonly used material now is SMO (20\18\6), a special material that is resistant to chloride ions and needs to be imported.
The dilute acid cooler materials are mostly Avesta 254SMO or Hastelloy C-30. The latter is more expensive, but it can adapt to higher fluorine content and has a long service life. If the content of fluorine and chloride ions in dilute acid cannot be determined, C-30 material is generally used.
Hastelloy and Alfara valve plate changers are easy to use, but the domestic ones are not as good as the ones made in China.
, the plate changer of Alfalla Valve is not perfect either. Ours was corroded and scrapped after only one year of use, and the after-sales quality is not good either!
Nowadays, plate heat exchangers made of SMO254 are generally used in China.