AIR POLLUTION CONTROL APPARATUS

摘要

A discharge gas treatment device equipped with: a denitrator (12) whereby the nitrogen oxides are removed to an extremely low concentration from a discharge gas (11A) discharged from a boiler (B) and comprising nitrogen oxides, sulfur oxides, and carbon dioxide; a desulfurizer (13) which has been disposed downstream in the gas flow from the denitrator (12) and which removes the sulfur oxides from the discharge gas (11B) to an extremely low concentration; a device for finish denitration/desulfurization (14) which has been disposed downstream in the gas flow from the desulfurizer (13) and by which the NO2 and SO2 that remain in the discharge gas (11C) in extremely low concentrations are removed with a sulfite-containing absorbing liquid to finish the removal thereof; and a carbon dioxide recovery device (15) which has been disposed downstream in the gas flow from the device for finish denitration/desulfurization (14) and which removes and recovers the carbon dioxide from the discharge gas (11D).