链-回-环系统铁矿氧化球团焙烧过程的能和分析  

Energy and Exergy Analysis of Iron Ore Pellets Induration in Grate-Kiln-Cooler

作　　者：张宇[1] 冯俊小[1] 张材[1] 谢知音[1] 果乃涛[1] 

机构地区：[1]北京科技大学机械工程学院

出　　处：《烧结球团》2008年第5期5-10,共6页Sintering and Pelletizing

基　　金：国家高技术研究发展计划(863计划)课题(No.2007AA05Z215)

摘　　要：在对铁矿氧化球团链-回-环系统做质能平衡测试的基础上,对其进行了能和的分析。能分析表明,系统的排气显热是能损失的主要部分,占29%。分析表明,传热不可逆损失是火用损失的主要部分,占40%。分析了烟气中氧含量、二氧化碳浓度对系统火用损失的影响。计算结果表明,当烟气中二氧化碳浓度为1.0%～9.0%时,将氧气浓度控制在9.0%～11.0%,可使火用损失最小。通过本研究对链-回-环系统内铁矿氧化球团焙烧过程的能流和流有了更进一步的认识。研究结果可以进一步应用于"链-回-环"系统的过程优化,以提高系统的经济效益。According to thermal balance test, energy and exergy analysis has been conducted to investigate the thermodynamic characteristics of iron ore pellets induration in grate- kiln - cooler （ GKC ） plant . The energy analysis shows that the energy loss is mainly caused by exhaust gas （29 percent）. Further, the exergy analysis reveals that the irreversibitity of heat transfer （40 percent） is the major source of exergy destruction. At last, the effects of percent oxygen and carbon dioxide on the exergy losses have been studied and the result shows that by control of parameter of percent oxygen ranging 9.0% - 11.0% in the kiln, the exergy destruction reaches the minimum at percent Carbon dioxide ranging 1.0% - 9.0%. In a word, this study provides a better understanding of the energy and exergy flows of iron ore pellets induration in the plant. The findings of the present study can further be applied to perform process optimization to maximize the cost-effectiveness of iron ore pellets induration production by GKC plant.

关 键 词：链篦机-回转窑-环冷机 不可逆 能和[火用]分析 铁矿氧化球团 系统节能 

分 类 号：TF046[冶金工程—冶金物理化学] TQ038[化学工程]