STUDY ON NO HETEROGENEOUS REDUCTION WITH COAL AND CHARS IN AN ENTRAINED FLOW REACTOR DURING REBURNING

摘要：

The effects of coal types with wide volatile matter including lignite, bituminous coal and lean coal, reaction temperature, coal particle size, the primary-zone stoichiometry (SR1) and reburning zone stoichiometry (SR2), etc. on NO reduction efficiency were carried out systematically in an entrained flow reactor, the heterogeneous NO reduction mechanism was analyzed. The results indicate that the NO reduction efficiencies increase with decreasing of SR2 and coal particle size, and increasing of reaction temperature; The char contributions to the total NO reduction efficiency increase with increasing proximate volatile matter, coal particle size and decreasing of reaction temperature. The char contribution can be reached more than 40％ when SR2 is larger than 1.06 or less than 0.92 for XLT lignite. The char contribution at the conditions of SR1=1.0 and SR1=1.2 is significantly larger than that at SR1=1.1 for coals with high volatile at a fixed reburning fraction.

关键词： NO heterogeneous reduction pulverized coal and char coal reburning

作者: Ping LU Shengrong XU Xiuming ZHU

作者单位: School of Power Engineering, Nanjing Normal University, Nanjing 210042, China

会议类型: 国际会议

会议名称: 第六届煤燃烧国际会议(The 6th International Symposium on Coal Combustion)

会议地点: 武汉

会议语种:英文

页码: 335-341

在线出版日期: 2007-12-01（万方平台首次上网日期，不代表论文的发表时间）