COUNTERMEASURE AT THE TIME OF ABSORBENT SLURRY CONCENTRATION RISING IN FLUE GAS DESULFURIZER

摘要

PROBLEM TO BE SOLVED: To provide a countermeasure at the time of adsorbent slurry concentration rising in a flue gas desulfurizer for absorbing and removing a sulfur oxide in a flue gas by bringing an absorbent slurry into contact with a flue gas, which restores the adsorbent slurry concentration to the range of proper values promptly and efficiently when the adsorbent slurry concentration rises.;SOLUTION: The countermeasure when the operation standard value in the adsorption tower (70, 80) exceeds a predetermined range comprises the step of automatically adjusting the amount of ash dust from the flue gas (A) to be incorporated into the flue gas desulfurizer (gas-liquid contact apparatus 10), the step of increasing the circulation amount of the absorbent slurry (increase of the moving blade divergence of a circulation pump 74), the step of increasing the oxidized air flow rate supplied into the absorption tower (increase of the oxidized air flow rate by means of an air supply means 61), the step of decreasing the absorbent slurry flow rate to be supplied into the absorption tower (decrease of the flow rate of the slurry pump 50) and the step of increasing the absorbent slurry flow rate to be supplied into a dehydrator 30 (belt filter) (increase of the flow rate of an extraction pump 20).;COPYRIGHT: (C)2008,JPO&INPIT