(1. 中南大学 能源科学与工程学院，长沙 410083；2. 中国铝业公司 河南分公司，郑州 450041)
摘 要: 以 传递理论与 分析方法为基础，建立混联法氧化铝生产过程 耗复杂灰箱模型；选取某氧化铝企业2008年两个月生产数据进行计算，得到氧化铝生产过程中各子工序的供给 、 损及 效率。计算结果表明：供给 主要消耗在熟料烧成、焙烧、管道化溶出和蒸发工序，占总供给 的85%左右；熟料烧成工序 效率最低，仅为7%左右；针对 损较大的工序展开节能改造可有效降低生产能耗。采用 分析方法对流程工业能耗状况进行分析，可以有效评价企业能源利用状况及能量损失，有利于有针对性地挖掘企业节能潜力，降低企业能耗。
关键字: 系统节能； 分析；氧化铝生产；流程工业
（1. School of Energy Science and Engineering, Central South University, Changsha 410083, China;
2. Henan Branch, Aluminum Corporation of China, Zhengzhou 450041, China）
Abstract:A complex grey-box model of alumina production in mixed-combined process was built on the basis of exergy transfer theory and analysis means. According to the two months production data obtained from a certain aluminun corporation, the loss and efficiency of the exergy were calculated. The calculation results show that the supplied exergy is mainly consumed in such unit processes as slurry sintering, aluminium trihydrate calcining, tube digestion and evaporation, which consumes about 85% of the exergy in the alumina production. The slurry sintering process has the lowest exergy efficiency of about 7%. The innovation for energy saving can be proceeded on the unit process with low exergy efficiency. It is not only effective for evaluation of enterprise utilization of energy and quality of energy loss, but also advantageous for making the best of the potential energy saving capacity of enterprise by using exergy analysis method.
Key words: system energy saving; exergy analysis; alumina production; process industry
