Patent ID: 7976622

Claim:
A wet flue gas desulfurization system comprising: an absorber in which flue gas emitted from a combustion apparatus is introduced, and an absorbent liquid is sprayed into the flue gas from spray nozzles of spray headers provided in multiple stages along a direction of a flue gas flow to absorb and remove soot and dust contained in the flue gas, sulfur oxide, and substances caused by components included in a fuel used in the combustion apparatus; an absorbent recirculation tank provided in a lower portion of the absorber; and a plurality of absorbent liquid circulation paths that circulatively feed the absorbent liquid extracted out of the absorber from the absorbent recirculation tank again to the respective spray headers, respectively, wherein each circulation path comprises an absorber recirculation pump for each individual spray header, each absorber recirculation pump being provided externally of the absorber, the circulation path for each individual spray header extends through a wall surface of a void tower portion near the absorbent recirculation tank, and inside the absorber by way of an upwardly inclined pipe that extends in a longitudinal direction of the absorber, the circulation path further extending in a direction of flue gas flow at a center or in a vicinity of the center of the absorber, and a front-end portion of each of the circulation paths is connected to the respective individual spray header.