摘要
为给大型循环流化床O2/CO2燃烧系统在高氧气浓度下的燃烧提供参考,在燃烧室直径140 mm、高度6 000 mm的0.15 MW循环流化床燃烧试验系统上,在O2/N2气氛中,进行了煤在高氧浓度下的燃烧试验。实验结果表明,在一次风氧气浓度49.0%～53.3%、二次风氧气浓度50.8%～56.0%时仍可以安全、稳定燃烧。煤在燃烧过程中SO2收率为92.2%～94.0%,配风对SO2收率影响不大。不同风量配比下,NOx收率为6.71%～7.64%,N2O收率为5.13%～7.23%。降低一次风氧量,有助于降低NOx收率和N2O收率。推迟二次风加入时间,有助于降低N2O收率,但会使NOx收率升高。
To offer reference for the combustion in a large-sized circulating fluidized bed of an O2/CO2 combustion system at a high oxygen concentration,a combustion test was performed of coal at a high oxygen concentration in O2/CO2 atmosphere in a 0.15 MW circulating fluidized bed combustion test system with a combustion chamber having a diameter of 140 mm and a height of 6000 mm.The test results show that when the oxygen concentration of the primary air ranges from 49.0% to 53.3% and that of the secondary air is in a range from 50.8% to 56.0%,the above-mentioned combustion system can still undergo a safe and stable combustion.During the combustion process of coal,the SO2 yield was in a range from 92.2% to 94.0% and the air provided had little influence on the SO2 yield.At various air quantities,the NOx yield ranged from 6.71% to 7.64% and the N2O yield from 5.13% to 7.23%.To reduce the oxygen content of the primary air will help reduce both NOx and N2O yield.To delay the time of the admission of the secondary air will help reduce the N2O yield but enhance the NOx one.
出处
《热能动力工程》
CAS
CSCD
北大核心
2012年第3期350-354,395,共5页
Journal of Engineering for Thermal Energy and Power
基金
国家自然科学基金资助项目(50906084)
中国科学院知识创新工程重要方向项目(KGCX2-YX-399+3)
中国博士后科学基金资助项目(20090450578)
