REDUCTION OF SULFUR OXIDES IN CHLORINE BYPASS EXHAUST GAS

摘要

PROBLEM TO BE SOLVED: To provide a method for reducing SOx in a chlorine bypass exhaust gas, enabling the minimization of the increase of the SOx in the final exhaust gas by the chlorine bypass exhaustion. SOLUTION: A chlorine bypass exhaust gas sucked with a bypass fan 7 through a dust collector 13 is returned to the calcination oven 26 of an NSP kiln and then sufficiently supplied to a desulfurization reaction in the lower portion of an about 800-1,200 deg.C preheater 25 wherein the desulfurization reaction is actively carried out, thus desulfurizing the SOx in the chlorine bypass exhaust gas. Thereby, SOx in the final exhaust gas exhausted from a chimney 24 is reduced to several ppm or less.