Sulfuric acid concentrating involves obtaining sulfuric acid under atmospheric pressure, which has higher temperature than boiling point of acid corresponding to atmospheric pressure

摘要

Sulfuric acid concentrating involves obtaining sulfuric acid (1) under atmospheric pressure, which has a higher temperature than boiling point of the acid corresponding to atmospheric pressure. Overheated sulfuric acid is obtained with a part in a downstream vacuum concentration (V1). Re-concentrated sulfuric acid (3) is mixed such that a mixture (2) results, whose temperature is lesser than the boiling point of the mixture relative to the atmospheric pressure. The mixture is promoted into a modifying step under atmospheric pressure in a downstream vacuum concentration by a pump (P1).