链篦机-回转窑铁矿氧化球团焙烧过程的分析  

Exergy Analysis of Grate-Kiln Iron Ore Pellets Induration Process

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]北京科技大学热科学与能源工程系,北京100083

出　　处：《钢铁》2009年第7期90-95,共6页Iron and Steel

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

摘　　要：为了降低链-回-环系统球团矿焙烧过程的能耗,对某工业装置进行了平衡测试和分析,得到了流图。分析表明,传热不可逆损和燃烧不可逆损是系统损的主要部分。建立了气体质流量、床层空隙率、床高、球团直径、烟气中氧含量等运行参数与损的关系。结果表明,适当减小气体质流量、床高和球团直径,增大床层空隙率,可以减小损。在其它条件不变的情况下,当烟气中二氧化碳浓度为1.0%～9.0%,将空气消耗系数控制在1.6～2.0,可使损最小。Exergy balance test and exergy analysis have been conducted to investigate the thermodynamic characteristics of iron ore pellets induration process in a grate-kiln plant in order to economize energy. And a diagram of exergy flows in the plant helps to identify the sources and quantify the exergy losses. Furthermore, the exergy analysis reveals that the irreversibility of heat transfer and combustion is the major source of exergy destruction. And the effects of some important operating parameters, such as flow rates, porosity in pellet bed, height of bed, diameter of pellets, percent oxygen of gases, on the exergy losses have been studied. At last, the result shows that by reasonably decreasing flow rates, height of bed, and diameter of pellets, and increasing porosity in pellet bed, the exergy losses could be reduced, and reveals that by control of parameter of air consumption coefficient ranging 1.6-2.0 in the kiln, the exergy destruction reaches the minimum at percent carbon dioxide ranging 1.0%-9.0%.

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

分 类 号：TF046.6[冶金工程—冶金物理化学]