METHOD FOR STACK GAS DESULFURIZATION METHOD AND DEVICE THEREFOR

摘要

PURPOSE:To obtain a high desulfurization rate with a simple system by lowering the reactivity of a desulfurizer and CO2 in a desulfurizer storage device and dust collector. CONSTITUTION:The humidity and/or CO2 concn. in the atmosphere of the desulfurizer storage device 4 for supplying the desulfurizer A consisting of >=1 kinds of compds. among alkaline metals or alkaline earth metals to a desulfurization column 3 or exhaust gas flue 6 and/or the dust collector 7 for capturing particles contg. the unreacted desulfurizer (the particles recovered in the dust collector 7 are partly supplied as the desulfurizer again to the desulfurization column 3 or the exhaust gas flue 6) is previously removed. The humidity and the CO2 can both be decreased simply by supplying the dry air and the desulfurization performance is improved.