TREATMENT OF EXHAUST GAS BY ADDITION OF OZONE/AMMONIA

摘要

PURPOSE:To simultaneously remove NOx and SOx by a dry process, in a method for treating exhaust gas, by adding O3 and NH3 to exhaust gas containing NOx and SOx to convert NOx and SOx to solid products. CONSTITUTION:Exhaust gas containing NOx and SOx is introduced into an O3-reaction tank while O3 is added to said exhaust gas and NOx is oxidized to HNO3 or HNO2 by O3 and water. The amount to be added of O3 is determined and regulated by the optimum condition of the whole of a process. In the next stage, NH3 is added to respectively convert HNO3 and HNO2 to NH4NO3 and NH4NO2 and SOx receives oxidation reaction to form (NH4)2SO4. NH4NO2 in the front stage of an NH3-reaction tank is further oxidized to NH4NO3 and the formed salt is collected bya collector while treated gas is exhausted from a chimney through a blower.