DESULFURIZING METHOD BY SPRAYING FINE POWDER DESULFURIZING AGENT TO WASTE COMBUSTION GAS

摘要

PURPOSE:To eliminate bad influence of molten desulfurizer in a boiler furnace on heat transfer tubes by spraying a fine powder desulfurizing agent to the flow passage of the waste combustion gas at the gas temp. ranging from 500 to 800 deg.C from the boiler furnace to the flue. CONSTITUTION:A fine powder desulfurizing agent is sprayed to the flow passage of the waste combustion as at the gas temp. ranging from 500 to 800 deg.C from the boiler furnace to the flue so as to desulfurize the waste combustion gas. This powder desulfurizing agent collects sulfur oxide in the waste gas. The combustion waste gas at high temp. in the boiler furnace is cooled in a first heat exchanger 7 and second heat exchanger 8. The exhaust gas is at 1500-1600 deg.C near the burner, though this depends on the boiler type, and cooled in the first heat exchanger 7 to 700-900 deg.C. By spraying the fine powder desulfurizing agent in the flow passage of the waste gas from the exit of the first heat exchanger 7, high desulfurizing effect can be obtd.