Efficient Use of the Heat Resulting from the Sulphuric Acid Production Process for the Concentration of Washing-Acids and Spent Acids Containing Solids
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Low-temperature process heat is utilized for concentration of the acid residues of gas purification and other recirculation processes. The most efficient heat recovery process is by indirect heat transfer from the acid circuits of the sulphuric acid production facility to the acid circuits of the concentrating facility. Acid concentration takes place at relatively low temperature and water vapour partial pressure as a function of acid temperature and concentration. The crystallizing solids are removed by filter pressing. (ERA citation 09:037877)
Efficient Use of the Heat Resulting from the Sulphuric Acid Production Process for the Concentration of Washing-Acids and Spent Acids Containing Solids