The utility model provides an apparatus for preparing sulphuric acid azanol uses, equipment includes: calcium salts quenching and tempering cooling cauldron, disulfonate preparation reation kettle and hydrolysis reactor, calcium salts quenching and tempering coolings cauldron all contain the agitator with disulfonate preparation reation kettle, sprinkler, pH value apparatus, heat exchange tube and feed inlet tingle, hydrolysis reactor contain heater, hydrolysis reaction cauldron and discharging pipe. The device of the utility model is simple in structure, the yield is high, can turn into the sulphuric acid azanol that the high added value usage is extensive with coal -fired flue gas lime stone wet?flue?gas desulfurization accessory substance resource cyclic utilization.