Flue gas desulfurizatuin apparatus, flue gas desulfurization system, and method for operating flue gas desulfurization apparatus

摘要

A flue gas desulfurization apparatus including a catalyst unit formed of at least one activated carbon fiber board, and water-supply means for supplying, to the catalyst unit, water for forming sulfuric acid. The catalyst unit is provided in the apparatus in the form of a tower through which a discharge gas containing sulfur oxide can pass. The water-supply means is provided in the apparatus in the form of a tower. The apparatus comprises humidifying-cooling means for cooling and humidifying the discharge gas outside or inside the apparatus in the form of a tower and a liquid-feed line for feeding, to the humidifying-cooling means, dilute sulfuric acid which has been collected in the apparatus in the form of a tower and has a low concentration equal to or lower than a predetermined sulfuric acid concentration.