以Shell粉煤气化为背景,以多联产能源梯级利用理论为基础,提出甲醇-直接还原铁串联生产工艺。借助化工流程模拟软件Aspen Plus对分产和联产系统进行模拟。通过能量衡算,计算出单产甲醇的能耗为39.7 GJ/t,直接还原铁的能耗为11.7 GJ/t。以相对节能率为评价准则,比较分产系统和联产系统的性能,发现联产系统相对节能率达到7.93%。又简单分析了联产和分产系统中能量的分布和转移,发现驰放气和尾气的利用是系统性能改善的主要原因。 Based on the Shell pulverized coal gasification, based on cascade utilization of polygenerational energy, a tandem methanol-direct reduction process was proposed. Production and co-generation systems were simulated using Aspen Plus, a chemical process simulation software. Through energy balance calculation, it is calculated that the energy consumption of methanol produced per unit is 39.7 GJ / t and that of direct reduced iron is 11.7 GJ / t. With the relative energy-saving rate as the evaluation criteria, comparing the performance of the split-system and the co-generation system, it was found that the relative energy-saving rate of the co-generation system reached 7.93%. In addition, the distribution and transfer of energy in co-generation and sub-production systems are briefly analyzed. It is found that the use of de-aeration and tail gas are the main reasons for the improvement of system performance.