According to such problems as corrosion in brick flue duct and dry chimney

the structural strength of original brick flue duct be affected

expensive side-entering agitators

easy blocking of the desulfurizer preparing system and the high-level arrangement of vacuum belt dewatering machines that occurred during the FGD system transformation

the corresponding design optimization were proposed.For example

boosting modification of the induced draft fan

setting wet stack on top of the absorber

separating the absorber and the cyclic oxidation pool

cross-setting the discharge ports of bunker and that of slurry tanks

and conducting liquid-vapor separation with vacuum balance self-draining device.Application results showed that

the optimized system had such advantages as low investment

little maintenance

high reliability and stable operation

so it was suitable for desulfurization transformation for medium-sized power plant.