Patent ID: 6555082
Filing Date: 2003-04-29
Classification: B01D

Abstract:
A method for wet flue gas desulfurization of a flue gas by contacting the flue gas with an absorption agent having calcium compounds, the method comprising:passing the flue gas through a first washer having a spray device for applying absorption agent supplied from a sump to the flue gas, the sump being supplied with oxygen for effecting the oxidation of calcium sulfite in the absorption agent to calcium sulfate thereat; thereafter passing the flue gas through a second washer having a spray device for applying absorption agent to the flue gas such that the flue gas is subjected to serial applications of absorption agent due to its passage through the first washer and the second washer; a container for the absorption agent; at least partially recovering used absorption agent from the second washer in a recovery device; discharging absorption agent from the recovery device along a return line to the container; and supplying oxygen into the return line to contact absorption agent thereat such that calcium sulfite in the absorption agent is oxidized to calcium sulfate.