Flue gas wet scrubbing system - comprises scrubber and crystalliser for conversion of acidic pollutants to calcium salts

摘要

Flue gas wet scrubbing system comprises a scrubber vessel through which a suspension of finely-divided CaCO3 in water is circulated in countercurrent flow against flue gases containing acidic components. A crystallisation vessel at the base of the scrubber collects crystals which are pumped to a suitable solids discharge location. Water from the scrubbing liquor lost by vaporisation is recovered in an external heat exchanger and returned to the crystalliser for recirculation. For the removal of acid gases from flue gases and their conversion to solid materials.