Simultaneous removal of NO, SO, and Hg from flue gas in FGD absorber with oxidant injection (NaClO)- full-scale investigation.

Unlabelled: This article presents the results of an industrial-scale study (on 400 MW lignite fired unit) of simultaneous NO, SO, and Hg removal in FGD absorber with oxidant injection (NaClO) into flue gas. It was confirmed that the injection of sodium chlorite upstream the FGD (Flue Gas Desulfurization) absorber oxidize NO to NO, Hg to Hg, and enhancing NO and Hg removal efficiency from exhaust gas in FGD absorber. Mercury removal efficiency grows with the rise of degree of oxidation NO to NO and was limited by the phenomenon of re-emission.