Patent ID: 8398944
Filing Date: 2013-03-19
Classification: B01D,C02F,F23J,F23L

Abstract:
1. An air pollution control system comprising: a boiler that burns fuel; a NO a desulfurizer that causes sulfur oxides in flue gas having passed through the NO a waste-water treatment device including a solid-liquid separating unit that separates desulfurized waste water discharged from the desulfurizer into a solid and a liquid, and a mercury removing unit that removes mercury in the desulfurized waste water; and a treated waste-water returning unit that returns at least a part of treated waste water treated by the waste-water treatment device to the desulfurizer, wherein the mercury removing unit includes a separating unit that separates mercury solids from the desulfurized waste water by adding a coagulation aid into the desulfurized waste water to solidify the mercury, the coagulation aid is sulfide, and the waste-water treatment device includes an auxiliary-agent oxidizing unit that oxidizes the coagulation aid contained in separate liquid in which the mercury solids have been separated.