不同煤种混煤燃烧时NO_x生成和燃尽特性的试验  

Experimental Research of the NO_ x Generation and Burnout Characteristics During the Combustion of Blended Coals

作　　者：翁安心[1] 周昊[1] 张力 岑可法[1] 

机构地区：[1]浙江大学热能工程研究所,浙江杭州310027 [2]湖南省电力勘测设计院,湖南长沙410007

出　　处：《热能动力工程》2004年第3期242-245,共4页Journal of Engineering for Thermal Energy and Power

基　　金：国家重点基础研究专项经费 (G2 0 0 1CB40 960 0 )

摘　　要：在一维沉降炉上对无烟煤、贫煤、烟煤及其混煤的燃烧特性进行了研究 ,分析了不同因素对NOx 排放量的影响 ,并讨论了不同过量空气系数、掺混比及一、二次风比例对燃尽率的影响 ,试验结果表明 :当烟煤的掺混比例为 2 5 % ,NOx的排放量较低 ,混煤燃烧时沿程分析结果表明 ,煤种特性的不同导致NOx排放时有不同的峰值。The combustion characteristics of various coals (anthracite, lean coal and bituminous coal) and their blends were investigated in a one-dimensional sedimentation furnace. The impact on NO_ x emissions of various factors was analyzed along with a discussion of the effect on burnout rate of different excess air factors, mixing dilution ratios and the ratio of primary and secondary air. Test results indicate that when bituminous coal accounts for 25% of the blended coals the NO_ x emissions are relatively low. In case of burning blended coals there emerged several NO_ x emission peaks along the axis of the furnace, which are caused by the different characteristics of the coals taking part in the combustion.

关 键 词：混煤 NOx 掺混比 燃尽率 

分 类 号：X784[环境科学与工程—环境工程]