对丙醇/丁醇/3-甲基丁醇/2-乙基丁醇组成的4组分物系的分离从完全热耦合原理出发,详细阐述了该物系精馏过程的建立模型到模拟计算,讨论了热耦合过程的自由度和隔板塔的最佳塔段数,指出了操作变量和完全热耦合在最佳热力学状态下应满足的条件,通过化工流程模拟软件Aspen Plus 11.1对该物系的分离工艺从简捷法到严格法计算和最后的优化设计,分析了模拟结果,相比一般的序列塔分离工艺,完全热耦合塔序列即隔板塔节能15.1％,设备材料节省约38％,节能效果明显.并且从用能分析方面讨论了隔板塔内隔板传热利弊和回收热量的多少以及隔板的设计要求.%The system of propanol-butanol-(3-methyl-l-butanol)- (2-ethyl-l-butanol) in fully thermally coupled distillation column ( FTCD) was discussed, and the modeling and simulation for the energy-saving distillation process were described. The freedom degrees of FTCD and optimal column segments were given. Some operational variables were corresponded with the optimal thermodynamics in FTCD. By means of chemical process simulation software Aspen Plus 11. 1, the results of complex FTCD were analyzed in order to indicate the advanced characteristics of dividing wall column. The energy saving of dividing wall column is 15. 1% and the cost saving of equipment material is 38% compared with the conventional sequence distillation process, which shows a remarkable energy-saving effect. The exergy loss and the thermal target of the total column were imaged by some figures, and the material of dividing wall was proposed to satisfy the thermal recovery in column.
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