秸秆涡旋燃烧颗粒排放特性影响研究

Study on influence of combustion parameters on particle emission from rice straw fueled vortex combustor

利用颗粒物分级采样及烟气实时监测技术,研究稻草在涡旋燃烧炉燃烧时燃烧温度、一二次风配比、过量空气系数等参数对飞灰颗粒排放特性的影响。实验表明稻草燃烧产生的亚微米颗粒PM1及微细颗粒PM1-2.5主要由KCl和K2SO4组成。提高燃烧温度、增大一二次风配比将增加PM1排放浓度。试验中随着一二次风配比的增大或燃烧过量空气系数的增大,不同粒径颗粒的S/Cl摩尔比将增大,而适当的燃烧过量空气系数有利于减少PM和CO排放。

The characteristics of particles emission were studied using the aerosol sampling technology and flue gas mo -nitor.The influence of ash particles properties with different operation parameters of rice straw combustion including the furnace combustion temperature , primary /secondary air ratio and excess air coefficient was investigated .The results showed that the submicron particles PM 1 and the micro-sized particles PM1 -2.5 mostly consisted of sulfate （K2 SO4 ） and potassium chloride （KCl）.A higher temperature and primary air /secondary air ratio can lead to increase emission of PM1 .In addition, a higher primary air /secondary air ratio can lead to decrease S /Cl mole ratios of different size parti-cles, as well as a lower excess air coefficient .It was also found that a properly reduction of excess air coefficient can lead a lower PM1 and CO emission.