贵州无烟煤的燃烧特性和NO_x排放特性试验  

The experimental study of combustion and NO_x emission characteristics of Guizhou anthracite

作　　者：陈瑶姬[1] 周志军[1] 周宁[1] 杨卫娟[1] 刘建忠[1] 周俊虎[1] 岑可法[1] 

机构地区：[1]浙江大学能源洁净利用国家重点实验室,浙江杭州310027

出　　处：《浙江大学学报（工学版）》2011年第11期2020-2025,共6页Journal of Zhejiang University：Engineering Science

基　　金：国家"863"高技术研究发展计划资助项目(2008AA05Z304)

摘　　要：为了探究氧量及温度对贵州无烟煤的燃烧特性及NOx排放特性的影响,选用粒径为58～75μm的贵州无烟煤,利用一维沉降炉进行相关试验.研究结果发现,贵州无烟煤NOx排放量随着氧气量的增加而增加,当过量空气系数大于0.9后增幅趋缓;随着燃烧温度的上升,NOx生成量增加,在达到1 400℃后,由于生成大量热力型NOx,NOx排放量呈指数型大幅增长;氧量主要影响贵州无烟煤在燃烧过程的0.2 s之前以及2.0 s之后的NOx生成量,对于0.2～2.0 s的主燃烧区域的NOx生成量影响不大.研究认为氧量是影响贵州无烟煤NOx排放及燃烧的最主要因素,燃料型NOx对温度并不十分敏感.Influence of oxygen concentration and temperature on combustion and NOx emission characteristics of Guizhou anthracite was investigated in a subsiding furnace,adopting pulverized coal of 58-75 μm.Discharge amount of NOx increases with increasing of oxygen concentration,and the rate of increase decreases when excess air ratio is above 0.9;the raise of temperature increases discharge amount of NOx,and above 1 400 ℃,the rate of increase becomes bigger due to large amount of thermal NOx formation;NOx formation before 0.2 s and after 2.0 s of combustion is sensitive to oxygen concentration,which has less influence to NOx formation in main combustion section（0.2-2.0 s）.Oxygen concentration is the key factor to NOx emission and combustion of Guizhou anthracite,but fuel-NOx is not sensitive to temperature.

关 键 词：无烟煤 燃烧特性 NOX排放 一维沉降炉 

分 类 号：TK16[动力工程及工程热物理—热能工程]