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在空气和O2/CO2气氛下进行烟煤和褐煤的燃烧实验以考察压力和气氛对煤燃烧以及CO,NO,SO2析出过程的影响.采用排放峰值与排放总量2个指标来评估压力、气氛和温度等操作参数对煤在增压流化床富氧燃烧过程中NO及SO2生成的影响.结果表明:煤在增压富氧燃烧时CO,NO和SO2析出规律和增压空气燃烧时的规律相似,各组分气体均呈现单峰析出;O2/CO2气氛下,压力从0.1 MPa提高到0.7 MPa会抑制NO和SO2生成;随着温度的升高,NO和SO2的排放峰值和总量均增大,常压时两者增加的幅度要高于加压时.
Combustion experiments of bituminous coal and lignite in air and O2 / CO2 atmosphere were carried out to investigate the effect of pressure and atmosphere on the combustion of coal and the precipitation process of CO, NO and SO2. Two indicators of emission peak and total discharge were used to evaluate the effects of pressure and atmosphere Temperature and other operating parameters on the formation of NO and SO2 during the oxyfuel combustion in pressurized fluidized bed.The results show that the law of CO, NO and SO2 precipitation and the law of charge air combustion In the O2 / CO2 atmosphere, the pressure increased from 0.1 MPa to 0.7 MPa, which inhibited the formation of NO and SO2. As the temperature increased, the peak and the total amount of NO and SO2 emission were both Increase, the pressure increases both when the pressure is higher than the pressure.