Mercury removing system and mercury removing method

摘要

According to the present invention, a mercury removing system (A) includes a reaction gas supplier (20) that supplies reaction gas to treatment target gas; de-nitration equipment (2) that reduces nitrogen oxide in the treatment target gas to be removed and oxidizes low water-soluble mercury in the treatment target gas to obtain water-soluble mercury; and desulfurization equipment (7) that removes sulfur oxide and the low water-soluble mercury in the treatment target gas. The mercury removing system further includes an oxidation gas vaporizer (124) that heats an oxidation gas generating liquid to generate oxidation gas and a gas mixer (13) that mixes the oxidation gas with reducing gas to obtain the reaction gas, outside a flue and on the upstream side of the reaction gas supplier (20).