TREATMENT OF DESULFURIZATION WASTE WATER

摘要

PURPOSE: A method for treating desulfurization waste water discharged from a waste gas desulfurization facility for absorbing and separating sulfur oxide gas in a combustion waste gas by using an alkaline agent as an absorbent is provided which can stably operate waste treatment processes for a long period of time and does not need to supply gypsum from the outside. CONSTITUTION: A method comprises the steps of setting a solid-liquid separator for subjecting gypsum to solid-liquid separation in a line for extracting a concentrated waste water drained from an evaporator; separating gypsum from concentrated waster water and regenerating in the solid-liquid separator; adding all or a part of the regenerated gypsum to the evaporator or to the waste water fed to the evaporator; regenerating with gypsum formed in a desulfurization facility by discharging out of a system or returning to the desulfurization facility.