Patent ID: 7901645

Claim:
A mercury reduction system that reduces nitrogen oxide and mercury in flue gas discharged from a boiler, the mercury reduction system comprising: a chemical supplying unit that mixes at least two or more of a reducing agent for reducing nitrogen oxide in the flue gas on a denitration catalyst, a mercury chlorinating agent for oxidizing mercury in a presence of hydrogen chloride, and an oxidation-reduction agent for reducing nitrogen oxide in the flue gas on a denitration catalyst and for oxidizing mercury in the presence of hydrogen chloride, all in liquid states or all in gaseous states, and supplies a resultant mix into a flue of the boiler; a reduction denitration apparatus that includes a denitration catalyst for reducing nitrogen oxide in the flue gas with ammonia and for oxidizing mercury in the presence of hydrogen chloride; and a wet desulfurization apparatus that reduces mercury oxidized in the reduction denitration apparatus with an alkali absorbent.