烟气循环烧结的数值仿真  

Numerical simulation of flue gas circulation sintering

作　　者：张小辉[1] 张家元[2] 田万一[2,3] 郑敏[1] 周孑民[2] 王华[1] 

机构地区：[1]昆明理工大学冶金与能源工程学院冶金节能减排教育部工程研究中心,云南昆明650093 [2]中南大学能源科学与工程学院,湖南长沙410083 [3]中冶长天国际工程有限公司,湖南长沙410007

出　　处：《中南大学学报（自然科学版）》2014年第4期1312-1320,共9页Journal of Central South University:Science and Technology

基　　金：国家自然科学基金资助项目(51306084);国家重大产业技术开发专项基金资助项目([2009]1717)

摘　　要：通过对铁矿烧结过程流动、传热、传质的分析,建立烧结过程热质分析计算的数学模型,并验证计算模型的可靠性。根据常规烧结工艺烟气温度和成分含量的分布特点,基于余热利用和减量排放侧重点的不同提出相应的烟气循环烧结方案,通过模拟计算对比分析烟气循环烧结对于常规烧结工艺的改善作用。研究结果表明:烟气循环烧结工艺能提高上部料层最高温度,使料层最高温度在高度方向上更加稳定,能提高烟气余热利用量,降低烟气脱硫处理量和脱硫负荷,提高烟气脱硫效率。A mathematical model was proposed through analyzing the flow, heat and mass transfer in iron ore sintering, and the reliability of this model was verified by comparing the calculated and test values. According to the distribution of temperature and components content of flue gas, different flue gas circulation sintering （FGCS） processes were developed based on different highlights in energy saving and emission reduction. Comparison of FGCS and conventional sintering on solid temperature distribution, energy saving and emission reduction were conducted through simulation. The results show that the FGCS can increase the temperature of top sintered bed, the waste heat utilization and the efficiency of flue gas desulfurization, make the distribution of solid temperature in direction of height more stable, and reduce the volume of flue gas to be treated and the load of desulfurization.

关 键 词：烟气循环烧结 传热传质 数值模拟 节能减排 

分 类 号：TF046.4[冶金工程—冶金物理化学]