Patent ID: 7846406

Claim:
A scrubber for scrubbing at least one pollutant from flue gas, the scrubber comprising: a first stage configured to provide a chemical oxidant solution to a stream of flue gas; and a second stage configured to provide a second chemical or chemicals to the stream of flue gas, the second stage comprising a first nozzle array constructed and arranged to direct a first flow of the second chemical or chemicals in a first tangential direction into the stream of flue gas, a second nozzle array located downstream from the first nozzle array with respect to the direction of flow of the stream of flue gas, the second nozzle array constructed and arranged to direct a second flow of the second chemical or chemicals in a second tangential direction that is substantially opposite the first direction into the stream of flue gas to create hydraulic shear within the stream of flue gas, a recirculation feature configured to continuously recirculate a slurry-type medium or solution in the second stage, the slurry-type medium or solution being configured to capture and contain the at least one pollutant, and a by-product processing portion configured to remove and dewater a by-product from the slurry-type medium or solution, the by-product comprising a reaction product of at least one pollutant.