水泥熟料烧成系统NO_X生成特性研究  

An investigation into NO_X formation in preheater and precalciner cement kilns system

作　　者：嵇鹰[1,2] 田耀鹏[1] 周蕊[1] 谢奋国 

机构地区：[1]西安建筑科技大学材料科学与工程学院,陕西西安710061 [2]西部建筑科技国家重点实验室(筹),陕西西安710055 [3]陕西省建筑材料工业学校,陕西西安710061

出　　处：《西安建筑科技大学学报（自然科学版）》2011年第5期735-740,共6页Journal of Xi'an University of Architecture & Technology(Natural Science Edition)

基　　金：陕西省科技工业攻关资助项目(2010K07-02)

摘　　要：利用德国Testo350烟气分析仪,采集了两种新型干法水泥生产线中窑尾烟室、分解炉底部、分解炉上部和每级旋风筒入口的烟气数据,分析表明:空气过剩系数、煤粉特性、燃烧气氛和SO2的浓度等对NOX的生成有一定的影响.合理组织分解炉底部煤粉燃烧,适当提高窑尾烟室CO浓度,使得窑头产生大量的NOX得到还原,降低NOX最终排放量.Samples of exit gases at the bottom of the kiln, inlet and outlet of pre-calciner and inlet of each cyclone pre-heat- er were taken in-line along with more than a dozen of pre-heater and pre-calciner cement clinker production lines, which were measured / analysed by Testo 350 flue gas analyzer for the components in the exiting gases. Data measured showed that levels of excessive air, properties of coal used, conditions of combustions and concentration of SOz etc. exerted an effect on the formation of NOx in pre-heater and pre-calciner cement kilns system. Proposal to raise the CO concentration level at the bottom of pre^calciner by improving its design for coal burning was made. The increase of CO concentration in the pre-calciner would help to convert the NOx from the kiln exit gases into harmless N2, and therefore, reduction in NOx emissions could be anticipated in exhaust off-gases.

关 键 词：分解炉 NOx CO 过剩空气系数 

分 类 号：TQ172.6[化学工程—水泥工业]