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Dimensioning Multipartition Dividing Wall Columns

Performance simulation of multiproduct dividing wall columns (DWCs) and related optimization considerations provide information on the energy- saving potential of various heat coupling arrangements. The control of multiproduct configurations also gains increasing attention. Information on physical implementation, i.e., the know-how required to design in a cost-effective way a DWC incorporating two or more partition walls arranged in parallel and in series, is still missing. Complex DWC sizing is explored that needs to be carried out with utmost care because pressure drop equalization is the key to ensuring the required vapor splits among parallel sections. The adopted methodology as well as related design challenges and peculiarities are illustrated by considering three feasible alternatives for a packed four-product DWC.

distillation; dividing wall column; energy saving; heat coupling; multiple partition walls

Special Issue: Best of ECCE and ECAB : Chemical Engineering and Applied Biotechnology.