烧结烟气CO的产生及治理途径——生成机理及排放规律  

Generation and governance way of CO in sintering flue gas——formation mechanism and emission law

作　　者：廖继勇[1,2,4] 郑浩翔 甘敏 余海钊[1,4] 范晓慧 LIAO Jiyong;ZHENG Haoxiang;GAN Min;YU Haizhao;Fan Xiaohui(Engineering Technology Research Center,Zhongye Changtian International Engineering Co.,Ltd.,Changsha 410205,Hunan,China;Sintering and Pelletizing Editorial Department,Zhongye Changtian International Engineering Co.,Ltd.,Changsha 410205,Hunan,China;School of Minerals Processing and Bioengineering,Central South University,Changsha 410083,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工程技术研究中心,湖南长沙410205 [2]中冶长天国际工程有限责任公司《烧结球团》编辑部,湖南长沙410205 [3]中南大学资源加工与生物工程学院,湖南长沙410083 [4]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：《烧结球团》2021年第2期1-7,共7页Sintering and Pelletizing

基　　金：国家自然科学基金面上项目(51974371);湖南省科技创新平台与人才计划(2018TP1033);湖南省重点研发计划资助项目(2018SK2049)。

摘　　要：铁矿烧结是典型的高能耗高污染过程,其能耗仅次于炼铁。烧结过程80%~85%的能源消耗来自于固体燃料。本文对烧结工序所使用的固体燃料的燃烧行为进行分析,总结出烟气中CO少部分来自于燃料挥发分的裂解反应,绝大部分来自于局部低氧气氛下焦炭颗粒的不完全燃烧反应,以及气流存在条件下固体碳气化产生的CO因未能燃尽而被带入废气;并通过固体碳燃烧气固两相双膜模型对CO的生成机理进行了分析;此外,对烧结机各风箱烟气中O_(2)、CO_(2)、CO的排放进行关联研究,阐明了烧结过程CO的排放特性。Iron ore sintering is a typical process with high energy consumption and high pollution,and its energy consumption is second only to ironmaking.About 80%~85%of total energy consumption comes from the solid fuels.The combustion behavior of solid fuels used in the sintering process is analyzed,it is summarized that a small part of the CO in the flue gas comes from the reaction of the volatiles of anthracite coal,most of it comes from the incomplete combustion reaction of coke particles in a local low-oxygen atmosphere,and the CO produced by the gasification of solid carbon in the presence of airflow is carried into the exhaust gas because it cannot be burned out.The formation mechanism of CO is analyzed through a gas-solid two-phase dual film model for solid carbon combustion.Afterwards,the emissions of O_(2),CO_(2),CO in the flue gas of each air box are correlated and researched,and the CO emission characteristics of the sintering process are elaborated.

关 键 词：烧结烟气 CO 减排 烟气成分 

分 类 号：TF046.4[冶金工程—冶金物理化学] X701[环境科学与工程—环境工程]