EXPERIMENT STUDY OF REDUCING NO_x EMISSION IN CORNER-FIRED BOILER WITH AIR-STAGED COMBUSTION

摘要

In the thesis, furnace temperature, NO_x density in flue gases, denox efficiency and heat efficiency are introduced on the 3# boiler of Wulashan Electric Power Plant after air-staged combustion reformation and the results are discussed. After air-staged combustion is adopted on bituminous coal burned boiler of the plant 3# unit NO_x emission is controlled evidently. NO_x density in gases is reduced less than 500mg/Nm~3 (7% O_2) and denox efficiency is increased to 50%. Adopting combustion of combining axial air-staged and radial air-staged unit high heat efficiency is achieved and ash sticking as well as high temperature corrosion is controlled effectively. Burner nozzle working condition is ameliorated so that the working life is prolonged.