METHOD OF REMOVING SULFUR DIOXIDE FROM FLUE GASES, ESPECIALLY POWER PLANT FLUE GASES AND FLUE GASES FROM GARBAGE INCINERATOR PLANTS

摘要

SO2 containing flue gas is scrubbed with a scrubbing solution made up from ammonia water, untreated ammonium sulfate scrubbing solution recycled from the bottom of the scrubbing zone and ammonium sulfate solution formed by oxidizing a portion of the recovered ammonium sulfite scrubbing solution. The ammonium sulfite/ammonium sulfate mixing ratio is maintained at 15:1 to 3:1.