WET TYPE FLUE-GAS DESULFURIZATION APPARATUS AND APPLICATION METHOD OF THE WET TYPE FLUE-GAS DESULFURIZATION APPARATUS

摘要

PROBLEM TO BE SOLVED: To provide a wet type flue-gas desulfurization apparatus capable of reducing the consumed amount of a washing liquid and the treated amount of a waste liquid in the washing of a pH meter at an absorption tower in the wet type flue-gas desulfurization apparatus installed in a thermal power station and the like and stably controlling the limestone supply amount, and to provide an application method of the same.;SOLUTION: The adhesion of manganese over a specified quantity on the electrode surface of a pH meter is determined when the pH value of an absorption liquid slurry measured by the pH meter at an absorption tower in an exhaust gas desulfurizer using a wet lime stone-gypsum method exceeds a predetermined specific variation range. The pH meter is taken out from the absorption liquid slurry and the electrode of the pH meter is washed with a washing liquid. The pH meter after washing is immersed again in the absorption liquid slurry and the supply amount control of the absorption liquid slurry is performed so that the pH value of the absorption liquid slurry maintains an up-to-date pH value just after washing the electrode of the pH meter.;COPYRIGHT: (C)2015,JPO&INPIT