| 摘要 |
PURPOSE: To improve the desulfurizing and denitrating performance of a regenerated catalyst by adding ammonia to an inert gas which is to be supplied to an inert gas introducing region and utilized in the case of regeneration of used carbonaceous catalyst, e.g. activated carbon used for a dry desulfurizing and denitrating process to purify exhaust gas from a boiler. CONSTITUTION: After ammonia gas is introduced to an inlet of a cross-flow type fluidized-bed reactor R, exhaust gas from a boiler is introduced to the reactor R and sulfur oxides in the gas are absorbed as sulfuric acid and ammonium sulfate in a carbonaceous catalyst C. Meanwhile, nitrogen oxides in the exhaust gas are reduced to nitrogen gas by reduction reactions. After that, in the case used carbonaceous catalyst C is regenerated, the catalyst C is supplied to a regenerating apparatus 1 by a valve V1 , flows down in a thermally conductive tube 5..., and is heated by a heated gas 6 to release desorbed substances, e.g. sulfur dioxide, hydrogen chloride, and ammonia, and the desorbed substances are parted from the catalyst C by an inert gas 8 containing ammonia and discharged out of a line 9. |
