分级燃烧技术在5000t/d熟料生产线的应用实践  

Application of Staged Combustion Technology in 5000t/d Clinker Production Line

作　　者：黄彬 孙文博 HUANG Bin;SUN Wenbo(China United Cement Lunan Co.,Ltd.,Tengzhou Shandong 277531,China)

机构地区：[1]鲁南中联水泥有限公司,山东滕州277531

出　　处：《水泥技术》2022年第2期46-49,共4页Cement Technology

摘　　要：分析了水泥生产中NO_(X)的形成机理,介绍了分级燃烧工艺的改造流程。通过改造分解炉燃烧系统、优化三次风管、改进C4下料管、更新撒料盒、优化SNCR系统喷枪位置,精细化系统操作,在水泥窑烟气NO_(X)排放浓度<100mg/Nm^(3)条件下,SNCR脱硝系统氨水(浓度20%)用量约4.1kg/t.cl,比改造前节省50%以上。改造前,氨逃逸浓度平均值为1.71mg/Nm^(3),≯8mg/Nm^(3)合格率93.42%;改造后,氨逃逸浓度平均值0.27mg/Nm^(3),≯8mg/Nm^(3)合格率100%。The mechanism of NO_(X) generation in cement production is analyzed,and the technological transformation process of staged combustion technology is introduced.By transforming the combustion system of the calciner,optimizing the tertiary air duct,improving the C4 discharge pipe,updating the splash boxes,optimizing the position of the spray gun of the SNCR system,and refining the system operation,under the condition that the NOX emission concentration of cement kiln flue gas is<100mg/Nm^(3),the amount of ammonia water(20%concentration)in the SNCR system is about 4.1kg/t clinker,which is reduced by more than 50%than before the transformation.Before the transformation,the average ammonia escape emission concentration was 1.71mg/Nm^(3),and the qualified rate below 8mg/Nm^(3) was 93.42%;After the transformation,the average ammonia escape emission concentration is 0.27mg/Nm^(3),and the qualified rate below 8mg/Nm^(3) is 100%.

关 键 词：分级燃烧 分解炉 脱硝效率 

分 类 号：TQ172.622.29[化学工程—水泥工业]