Double-tower efficient wet desulphurization device

The invention discloses a double-tower efficient wet desulphurization device which comprises four subsystems including the SO2 absorption system, the slurry supply system, the oxidation air system and the gypsum dehydration system. The SO2 absorption system is composed of a primary desulphurization tower and a secondary desulphurization tower which are of the same structure, are connected in series and share a set of the slurry supply system and the oxidation air system, gypsum slurry in the secondary desulphurization tower is delivered into the primary desulphurization tower, and gypsum in the primary desulphurization tower is discharged out of the tower through the gypsum dehydration system. The double-tower efficient wet desulphurization device has the advantages of being high in desulphurization efficiency, wide in application range, stable in operation, convenient to maintain and overhaul and the like. Flue gas purified by the desulphurization device can meet the increasingly strict SO2 ultralow emission