摘要
在热重分析仪上进行了燃烧特性试验,考察了CO2浓度对徐州烟煤及其煤焦燃烧特性的影响,并在固定床反应器上研究了CO2浓度对烟煤燃烧过程中气态污染物排放特性的影响.结果表明:在相同O2浓度下,随着CO2浓度的提高,煤及煤焦的着火温度略有上升,燃尽温度明显升高,煤焦的燃尽时间显著延长;SO2排放浓度随时间增加呈双峰析出,其排放量随CO2浓度的提高而减少;NO排放量随CO2浓度的提高而减少;CO排放量随CO2浓度的提高而增加;当温度低于烟煤的燃尽温度时,CO2对煤焦的气化作用使CO排放量大幅增加.
Effects of CO2 concentration on combustion and pollutant emission characteristics of Xuzhou bituminous coal and its char were studied respectively on a thermo-gravimetric analyzer and a fix bed reactor. Results show that for the same O2 concentration and with the rise of CO2 concentration, ignition temperatures of both the bituminous coal and its char increase slightly, while their burnout temperatures rise obviously and the burnout time of char delays noticeably; with the rise of CO2 concentration, SO2 emission reduces with two sulfur releasing peaks produced along with time, NO emission decreases and CO emission grows. When actual temperature is lower than the burnout temperature of coal, CO emission rises greatly due to char-CO2 gasification.
出处
《动力工程》
CSCD
北大核心
2009年第6期571-575,共5页
Power Engineering
基金
国家重点基础研究发展计划资助项目(2006CB705806)
东南大学优秀博士论文基金资助项目
关键词
富氧燃烧
热重分析
CO2浓度
燃烧特性
污染物排放特性
oxygen-enriched combustion
thermo-gravimetric analysis
C02 concentration
combustion characteristic
pollutant emission characteristic
