摘要
通过恒温燃烧污染物在线监测系统,研究玉米芯焦掺混比例、玉米芯焦碳化温度及温度等对玉米芯焦与煤混燃过程中NO_(x)生成释放特性的影响。结果表明:与原煤燃烧相比,煤与玉米芯焦混燃时,单位质量试样的NO_(x)释放总量减少。随碳化温度的升高,NO、NO_(2)释放过程加快,NO释放峰值基本不变,约为33 mg/m^(3),NO_(2)释放峰值由26 mg/m^(3)减至16 mg/m^(3)。随混合样品中玉米芯焦掺混比例的增加,NO_(2)释放量由0.8 mg/g增至2.85 mg/g,NO释放量由4.22 mg/g减至1.90 mg/g。随燃烧温度的升高,NO释放量由1.33 mg/g增至4.74 mg/g,NO_(2)释放量由3.29 mg/g减至0.12 mg/g。同时,低温(800~900℃)下,混合样品燃烧时释放的NO_(2)量高于NO释放量,而高温(900~1100℃)下则相反。
In this study,the NO_(x)emission characteristics of torrefied corncob blended with coal were investigated by using a modified fixed bed thermogravimetric apparatus.The effects of biochar blending ratio,pyrolysis temperature,and experimental temperature on the NO_(x)emission characteristics were studied.The results show that compared with the combustion of Qingshuigou anthracite,the total amount of NO_(x)released is reduced during the co-firing of Qingshuigou anthracite and torrefied corncob.As the pyrolysis temperature of corncob increased,the formation and release process of NO and NO_(2)had been accelerated,the release peak of NO increased slightly,and the release peak of NO_(2)decreased from 26 mg/m^(3) to 16 mg/m^(3).With the increase of biochar blending ratio,the amount of NO_(2)released increased from 0.8 mg/g to 2.85 mg/g while the amount of NO released decreased from 4.22 mg/g to 1.90 mg/g.The amount of NO released increased from 1.33 mg/g to 4.74 mg/g and the amount of NO_(2)released decreased from 3.29 mg/g to 0.12 mg/g with the experimental temperature rose.Besides,the amount of NO_(2)released was higher than that of NO released during the co-firing at lowtemperature section(800-900℃).On the contrary,the amount of NO_(2)released was lower than that of NO released during the co-firing at high-temperature section(900-1100℃).
作者
许旭斌
许紫阳
王锋涛
杨硕
冯斌
Xu Xubin;Xu Ziyang;Wang Fengtao;Yang Shuo;Feng Bin(Rundian Energy Science and Technology Co.,Ltd.,Zhengzhou 450000,China;School of Energy and Power Engineering,North China Electric Power University,Baoding 071003,China)
出处
《太阳能学报》
EI
CAS
CSCD
北大核心
2021年第11期387-394,共8页
Acta Energiae Solaris Sinica
关键词
生物质
煤
燃烧
NO_(x)释放特性
碳化
biomass
coal
combustion
NO_(x)emission characteristics
carbonization
