SOx in flue gas is absorbed in the absorber by contact with absorbent slurry. Absorbent slurry is recycled by the absorber recycle pump. Absorbed SOx goes into the reaction sump which is located at the lower part of the absorber. In the reaction sump, SOx absorbed is changed to gypsum. Mist, which scatters from the absorber, is removal by the two stage mist eliminators. The system consists of the following equipment