Denitrification additive, denitration additive oxidation-reduction method, using wet flue gas denitration agent to oxidize NO to NO2, and then reducing NO2 to N2 with aqueous solution. This method can be combined with wet desulfurization technology using CaCO3 (limestone) as desulfurizer, and the reaction product of desulfurization can also be used as a reducing agent for NO2. The denitration of wet flue gas denitration agent
The rate can reach 95% and desulfurization can be achieved simultaneously.