EXHAUST GAS PROCESSING DEVICE , AND METHOD OF USING THE SAME

摘要

In an exhaust gas processing device wherein in order to efficiently outwardly discharge heat at high temperatures of about 90 - 150 ºC released from a GGH reheater (9) during the shutdown of a desulfurizer, to prevent damage to equipment and corrosion preventive lining material, and to ensure long-term stabilized use of the exhaust gas processing device, at least a GGH heat recovery unit (5), an absorption tower (6), a mist eliminator (M/E) (8), and the GGH reheater (9) are placed in a duct for exhaust gases discharged from a fire furnace, in the order named as seen from the upstream side of a flow of exhaust gases, an exhaust gas duct (7) between the M/E (8) and the reheater (9) (the exhaust gas duct (7) between the M/E (8) and the reheater (9) may be provided with an SGH (16)) is provided with a heat radiation device (a blow-off valve (11), a blow-off pipeline (12)) or the like having a heat suppression function for suppressing dissipated heat from the reheater (9).