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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.
The combustion characteristic test was carried out on a TGA. The effects of CO2 concentration on the combustion characteristics of Xuzhou bituminous coal and its coke were investigated. The effects of CO2 concentration on the emission characteristics of gaseous pollutants during the combustion of bituminous coal were studied on a fixed bed reactor .The results showed that with the increase of CO2 concentration, the ignition temperature of coal and coal char increased slightly at the same O2 concentration, the burnout temperature increased significantly, and the burnt-out time of coal char significantly increased.The concentration of SO2 emission over time The emission of CO2 decreases with the increase of CO2 concentration; the emission of NO decreases with the increase of CO2 concentration; the emission of CO2 increases with the increase of CO2 concentration; when the temperature is lower than the burnout temperature of bituminous coal, The CO2 gasification of coal char makes CO emissions increase significantly.