摘要
利用化工流程模拟软件Aspen Plus,以DMSO为萃取剂,模拟研究四氢呋喃-水共沸物的分隔壁萃取精馏和单塔侧线采出萃取精馏过程。分隔壁萃取精馏优化后工艺参数为:主塔22块理论板,萃取剂3块理论板处进料,原料17块理论板处进料,回流比0.5,溶剂比0.45;副塔10块理论板,回流比2.4。可得到摩尔分数为99.90%的四氢呋喃和99.19%的水,回收萃取剂的摩尔分数为99.72%。和常规双塔萃取精馏相比,冷凝器热负荷降低18.63%,再沸器热负荷降低15.58%,实现了有效节能。而单塔侧线采出萃取精馏不能实现四氢呋喃和水的有效分离。
The dividing wall extractive distillation and one column with side product extractive distillation for the separation process of tetrahydrofuran and water azeotrope with dimethyl sulfoxide（ DMSO） as extractive agent are simulated by using the chemical process simulation software of Aspen Plus. The optimal parameters for dividing wall extractive distillation are as follows： 22 of the number of theory stage of the main column,3 of the number of extractive agent feed stage,17 of the number of the mixture feed stage,0. 5 of the reflux ratio and 0. 45 of the mole ratio of extractive agent to the mixture,10 of the number of theory stage of the side column and 2. 4 of the reflux ratio. The mole fraction of tetrahydrofuran and water can reach 99. 90% and 99. 19%,respectively. The mole fraction of DMSO can also reach 99. 72%. In comparision with traditional two columns extractive distillation,energy saving based on dividing wall extractive distillation of condenser and reboiler is 18. 63% and 15. 58%,respectively. Energy saving is effectively realized. However,the extractive distillation based on one column with side product cannot realize the separation of tetrahydrofuran and water effectively.
出处
《现代化工》
CAS
CSCD
北大核心
2016年第9期182-185,187,共5页
Modern Chemical Industry
