摘要
为了研究燃烧气氛、进口氧气浓度、生物质掺混比、燃烧温度以及过量氧气系数对循环流化床(CFB)富氧燃烧过程中NO,N_2O排放特性以及燃料中N的转化特性的影响,以棉秆和大同烟煤为燃料,在50 k W循环流化床燃烧试验台上进行了空气气氛和O_2/CO_2气氛下的生物质与煤混合燃烧试验。试验结果表明:与空气气氛相比,O2/CO2气氛下,NO,N_2O的排放量和燃料中N的转化率均降低;随着进口氧气浓度和燃烧温度的升高,NO的排放量均升高,N_2O的排放量和燃料中N的转化率均降低;随着生物质掺混比的增大,NO的排放量和燃料中N的转化率降低,N_2O的排放量升高;NO,N_2O的排放量以及燃料中N的转化率均随过量氧气系数增大而升高。
In order to study the effects of combustion atmospheres, inlet oxygen concentration, biomass blending ratio, combustion temperature, and excess oxygen coefficient on the NO and N20 emissions as well as the fuel nitrogen （fuel-N） conversion,, co-combustion experiments of cotton stalk and Datong bituminous coal were conducted under air and O/CO2 atmospheres in a 50 kW circulating fluidized bed（CFB） combustor. Results show that all the emissions of NO and N2O as well as the fuel-N conversion ratio under O2/CO2 atmosphere are lower than those under air atmosphere. With inlet oxygen concentration and combustion temperature increasing, NO emission increases, but N2O emission and fuel-N conversion ratio decrease. As biomass blending ratio increases,NO emission and fuel-N conversion ratio decrease while the N2O emission increases. The increase of excess oxygen coefficient leads to the increase of NO, N2O emission and fuel-N conversion ratio.
出处
《可再生能源》
CAS
北大核心
2017年第2期159-165,共7页
Renewable Energy Resources
基金
中国科学院战略性先导科技专项项目(XDA07030200)
国家国际科技合作专项项目(2014DFG61680)
关键词
循环流化床
富氧燃烧
生物质
混烧
NO排放
N2O排放
circulating fluidized bed （CFB）
oxy-fuel combustion
biomass
co-combustion
NO emission
N2O emission
