Patent ID: 9327234
Filing Date: 2016-05-03
CPC Classification: B01D

Claim Text:
1. A flue gas desulfurization system comprising: means for absorbing acidic gases from a flue gas, the absorbing means comprising a tower, a contact zone within the tower, an inlet into the tower through which the flue gas enters the tower, and means for contacting the flue gas within the tower with a scrubbing media containing ammonium sulfate to produce a stream of scrubbed flue gas; means for collecting the scrubbing media containing the absorbed acidic gases, the collecting means comprising a tank in which the scrubbing media containing the absorbed acidic gases is collected to define a quantity of collected scrubbing media within the tank, the tank having an inlet below a surface of the collected scrubbing media through which the scrubbing media is received and an outlet below the inlet so that the collected scrubbing media flows downwardly from the inlet to the outlet of the tank; means for injecting a source of ammonia into the collected scrubbing media between the inlet and the outlet of the tank, the source of ammonia being laden with at least one compound chosen from the group consisting of hydrogen sulfide and mercaptans, the source of ammonia being absorbed into and reacted with the collected scrubbing media; means within the tank for stripping the at least one compound from the collected scrubbing media by causing the at least one compound to exit the collected scrubbing media as stripped gases, the stripping means comprising means for injecting an oxygen-containing gas into the collected scrubbing media at a location below where the source of ammonia is injected into the collected scrubbing media and above the outlet of the tank; means for collecting the stripped gases of the at least one compound without allowing the stripped gases to enter the stream of scrubbed flue gas; and means for isolating and removing the at least one compound from the flue gas desulfurization system.