SEAWATER DESULFURIZATION AND OXIDATION TREATMENT DEVICE AND SEAWATER FLUE-GAS DESULFURIZATION SYSTEM

摘要

A seawater desulfurization and oxidation treatment device is provided with an oxidation/aeration tank (16) for performing water quality restoration treatment on acid desulfurization seawater (13) containing sulfurous acid (H2SO3) generated by subjecting a sulfur oxide in exhaust gas from a boiler to seawater desulfurization, using dilution seawater (14) and air, and is configured by comprising: a main flow path (20A) which has an upstream-side weir (21A) formed on the inlet side in the longitudinal direction of the oxidation/aeration tank (16) and into which the dilution seawater (14) is introduced; an upstream-side mixing portion (22A) which is formed on the upstream side from the upstream-side weir (21A) and mixes the acid desulfurization seawater (13) with the dilution water (14) while introducing the acid desulfurization seawater therein; and a sub flow path (20B) which supplies the dilution water (14) that is detoured from the upstream-side from the upstream-side mixing portion (22A) of the oxidation/aeration tank (16) to post-dilute the acid desulfurization seawater (13) oxidized and aerated in the oxidation/aeration tank (16).