(520e) Design, Optimization and Control of Energy-Saving Dividing-Wall Column for Separating Azeotropes

Authors: 
Xia, M., Institute of Coal Chemistry, Chinese Academy of Sciences
Ma, Z., Institute of Coal Chemistry, Chinese Academy of Sciences
Li, D., Institute of Coal Chemistry, Chinese Academy of Sciences
Jia, L., Institute of Coal Chemistry, Chinese Academy of Sciences
Hou, B., Institute of Coal Chemistry, Chinese Academy of Sciences

Dividing-wall
column is an important way to process intensification. For the past decades,
more and more publications were focused on the design and control of
dividing-wall column (including petlyuk) since it usually offers considerable
energy saving and investment reduction. However, the past research emphasized ideal/zoetropic separation.
This work aims to extend the dividing-wall column to azeotrope separation for
energy and investment benefits, with special focus on design, optimization and
control. Firstly, this work reviewed the past research on the design and
control of dividing-wall column. Then a sequential design, optimization and
control procedure for azeotropic/extractive dividing-wall column was presented
on the basis of total annual cost (TAC) and effective control criteria. At
last, several cases were utilized to demonstrate the benefit potentials of
azeotropic/extractive dividing-wall column.



 (a)                                         
 (b)

 (c)                        
                  (d)


 
Figure
1: Extractive dividing-wall column:
(a) Integration scheme, (b) Equivalent scheme;
Azeotropic dividing-wall
column: (c) Integration scheme, (d) Equivalent scheme

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