CONTROL METHOD AND APPARATUS FOR DESULFURIZED WASTE WATER FROM WET TYPE FLUE-GAS DESULFURIZATION EQUIPMENT

摘要

PROBLEM TO BE SOLVED: To provide a control method for desulfurized waste water from wet type flue-gas desulfurization equipment which can inhibit the accumulation of fluorine, heavy metals, or the like, in a desulfurization equipment system to prevent the occurrence of the deterioration phenomenon of an absorbent activity, keep the pH of an absorption liquid in an absorption tower at a set pH value to ensure the desulfurization performance, and inhibit an increase in an absorbent excess ratio accompanied in the deterioration phenomenon of the absorbent activity to eliminate the loss of the absorbent, and an apparatus therefor.;SOLUTION: An extract line 28 which branches from the middle of a secondary overflow liquid line 27a and leads to a waste water treatment apparatus 18 is installed, thus when the deterioration phenomenon of the absorbent activity occurs, a secondary overflow liquid 25 from a secondary hydrocyclone 23 is discharged to the waste water treatment apparatus 18 as desulfurized waste water.;COPYRIGHT: (C)2004,JPO