Abstract
Low excess air ratio combustion brings about suppression of DXN, high efficiency of boiler and downsizing flue gas treatment because of high temperature and decrement of flue gas. However, it is possible that incombustibles gas, such as CO, increase at furnace exit under low excess air ratio combustion. The experimental and simulation studies are carried out with actual MSW incinerator (180ton/24h) in order to study the effect of combustion near solid phase and at secondary combustion zone. The simulation of incinerator includes solid phase and gas phase with coupling. The simulation results agree with the experimental results of temperature and gas composition profile. Under low excess air ratio operation, it keeps less than 2.0 ppm of CO and stable steam rate in commercial MSW incinerator.
