Patent ID: 8741033

Claim:
An air pollution control apparatus comprising: an absorber that serves as a passage for flue gas, the absorber having an entrance for the flue gas on a side thereof; an absorbent spraying unit that sprays an absorbent into the absorber; a reservoir tank that reserves therein the absorbent; and a defoaming agent diffusing unit that diffuses a defoaming agent over foams of the absorbent in the reservoir tank, wherein the flue gas is brought into gas-liquid contact with the absorbent in the absorber to process the flue gas while the flue gas is sent from a lower area toward an upper area of the absorber, the absorbent after processing the flue gas is collected into and reserved in the reservoir tank, the reservoir tank is arranged at a bottom of the absorber and opens into the absorber, the defoaming agent diffusing unit is arranged above a foam wavefront of the absorbent in the reservoir tank, and below the entrance, and on a same plane as a plane on which the entrance is arranged, and the defoaming agent diffusing unit diffuses the defoaming agent when processing of the flue gas is stopped.