建立了一种每块板上都允许存在中间换热器的接近最小热条件的复杂精馏塔模型,根据精馏过程的火用损最小,优化了回流比和塔内换热负荷。对于影响精馏过程用能的因素:理论板数、进料位置、进料热状况进行了分析,得出了,要设计一个节能的精馏塔如何选择合适的理论板数、进料位置及进料的热状况的方法。并比较分析了该塔和具有相同理论板数的传统简单塔的传质推动力,发现在这种塔的整个塔内的传质推动力比较平均,而整个精馏过程的火用损比简单塔的小。 A complex distillation column model was set up which allowed the existence of near-minimum thermal conditions for each intermediate heat exchanger on each plate. According to the minimum exergy loss in the rectification process, the reflux ratio and the heat transfer load in the column were optimized. For the factors that affect the energy consumption of the distillation process: the number of theoretical plates, the feed position, the thermal status of the feed was analyzed, we have to design an energy-saving distillation column how to choose the appropriate number of plates, feed position and Method of feeding the thermal condition. And mass transfer impetus of the tower and the traditional simple tower with the same theoretical plate number are comparatively analyzed. It is found that the mass transfer impetus in the whole tower of this tower is relatively average, while the exergy loss ratio of the whole distillation process is simple Small tower.