Multiple Steady-States Analysis and Unstable Operating Point Stabilization in Homogeneous Azeotropic Distillation with Intermediate Entrainer

详细信息    查看全文

• 作者：Weisong Li ; Lei Zhong ; Yongchao He ; Jihong Meng ; Fanglian Yao ; Yusheng Guo ; Chunjian Xu
• 刊名：Industrial & Engineering Chemistry Research
• 出版年：2015
• 出版时间：August 12, 2015
• 年：2015
• 卷：54
• 期：31
• 页码：7668-7686
• 全文大小：1517K
• ISSN：1520-5045

文摘

The steady-state multiplicity in azeotropic distillation processes has been theoretically predicted and verified experimentally for decades. However, it is a tough task to detect all the steady-state solutions. The purpose of this article is 2-fold: first, it provides a systematical study on the multiplicity in homogeneous azeotropic distillation with intermediate entrainer and a novel strategy is proposed to find all the steady-state solutions using 鈥淒esign Specs/Vary鈥?in Aspen Plus. Operating on the unstable steady-state branch benefits both energy saving and reducing capital investment with the product quality specified. Because of the great benefits that operating on the unstable steady-state branch offers, the second purpose is to present suitable control schemes to stabilize the operating point on the unstable steady-state branch to achieve robust control.