Can simple side stream configurations compete with fully thermally coupled dividing wall columns?

Publikationstyp
Conference Paper
Date Issued
2022
Sprache
English
Author(s)
Adami, Momme  orcid-logo
Horsch, Anna Sophia  
Skiborowski, Mirko 
Institut
Systemverfahrenstechnik V-4  
TORE-DOI
10.15480/882.4882
TORE-URI
http://hdl.handle.net/11420/14382
Citation
12th International Conference on Distillation & Absorption 2022
Contribution to Conference
12th International Conference on Distillation & Absorption, DA 2022  
Peer Reviewed
true
It is well known that thermal coupling of distillation columns can substantially decrease the energy requirements of distillation processes, which is confirmed by several hundred industrial implementations of dividing wall columns. However, the respective vapor splits have to be properly designed and require consistent hydrodynamics in the adjacent column sections. These limitations can be overcome by transformation of the thermal coupling to a side stream configuration, which adds a degree of freedom for operation of the process and allows the columns to be operated at different pressures. The current study investigates energy requirements and operating costs of single side stream configurations thermodynamically equivalent to side-rectifier and side-stripper columns in comparison to fully thermally coupled dividing wall columns and heat-integrated configurations. While side-stream configurations provide an interesting retrofit option and are competitive to fully-coupled dividing wall columns for certain ranges of feed compositions, they can outperform them significantly exploiting additional heat integration.
Subjects
Dividing Wall Column
Thermal Coupling
Liquid Only Transfer
Heat Integration
Shortcut Modeling
DDC Class
600: Technik
620: Ingenieurwissenschaften
Lizenz
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