THE DE-NOX EFFICIENCY IMPROVEMENT AT LOW TEMPERATURE AND YELLOW PLUME REDUCTION SYSTEM BY FAST SCR

摘要

PURPOSE: A system for increasing low temperature denitrification efficiency and eliminating visible smoke is provided to efficiently eliminate nitric oxide at a temperature lower than or equal to 300 degrees Celsius using a selective catalytic reducing method. CONSTITUTION: Fixing type oxidation catalyst and variable type oxidation catalyst are installed. The variable type oxidation catalyst is moved to adjust the components of exhaust gas and a selective catalytic reducing method is accelerated. The ratio of NO_2 to NO_x becomes 0.5. The catalyst oxidizes NO into NO_2. The catalyst is installed between a boiler and a heat exchanger. The oxidation rate of the NO_2 is adjusted by mounting the catalyst in one of multiple ducts and adjusting the flow amount of exhaust gas using a damper(16).