链篦机-回转窑球团NO_x排放规律及控制方法  

NO_x emission behavior and control method of grate-kiln pelletizing process

作　　者：胡兵[1,2] 叶恒棣 王兆才[1,2] 周志安[1] 向锡炎 HU Bing;YE Heng-di;WANG Zhao-cai;ZHOU Zhi-an;XIANG Xi yan(Engineering Center of Sinter Pellet and Direct Reduction, Zhongye Changtian International Engineering Co. , Ltd. , Changsha 410007, Hunan, China;National Engineering Research Center of Sintering and Pelletizing Equipment System, Changsha 410205, Hunan, China)

机构地区：[1]中冶长天国际工程有限责任公司烧结球团及直还工程技术中心,湖南长沙410007 [2]国家烧结球团装备系统工程技术研究中心,湖南长沙410205

出　　处：《中国冶金》2018年第4期66-70,共5页China Metallurgy

摘　　要：通过对NOx生成机理结合实际工况和生产条件的研究,掌握了不同燃料条件下链篦机-回转窑球团生产过程NOx的排放规律,查明了空气中氮气的高温氧化和燃料中氮的燃烧是NOx的主要来源。在此基础上,提出从优化原燃料结构、降低球团焙烧温度、采用先进再燃及烟气循环一体化技术着手,通过源头控制、过程控制和末端治理三者的协同控制,最终实现链篦机-回转窑球团生产过程低NOx排放。The NOxemission rules during grate-kiln pellets production process on the condition of different fuels were obtained by studying the generation mechanism of NOxcombined with the actual manufacture conditions and production conditions.It was found that the main sources of NOx were the high temperature oxidation of nitrogen in air and the burning of nitrogen element in fuels.Based on that,the optimizing of the structure of raw materials and fuels,reduction of the roasting temperature and application of an advanced reburning coupled with flue gas recycle technology were proposed.Finally,low NOxemission in grate-kiln pelletizing process was realized through the synergetic control strategy of source reduction,process control and end treatment.

关 键 词：链篦机-回转窑球团 氮氧化物排放规律 选择性非催化氧化还原法脱硝 低氮氧化物生产 

分 类 号：TF046.6[冶金工程—冶金物理化学] X757[环境科学与工程—环境工程]