基于CH* 自发光信号图像，系统研究了常规及掺氨条件下生物质单颗粒燃烧过程的着火特性，分析生物质种类、氨气掺混、背景烟气氧浓度、生物质单颗粒粒径等因素对生物质燃料着火延迟时间等燃烧特性参数的影响。结果表明：掺氨工况下生物质单颗粒的脱挥发分过程和燃烧反应速率显著加快，玉米秸秆及小麦秸秆单颗粒的着火延迟时间缩短、燃烧强度提高；生物质单颗粒粒径的减小和背景烟气氧浓度的增加均会使得生物质燃料着火过程提前。

Based on CH* chemiluminescence signal images, the ignition characteristics of biomass single particles during the combustion processes in normal and ammonia-doped conditions were systematically investigated. The effects of various parameters including biomass fuel type, ammonia doping, oxygen content in the background gas and the particle size of biomass on the ignition delay time for biomass fuels were studied. The results revealed that the devolatilization process and combustion reaction rate of biomass particles were significantly accelerated. The ignition delay times of corn straw and wheat straw particles were shortened and the combustion intensities were enhanced. Increasing the oxygen content of background flue gas and decreasing the particle size could accelerate the ignition processes of biomass fuels.