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Reversibility Analysis for Design Optimization of an Internally Heat‐Integrated Distillation Column
Author(s) -
Xu L.,
Yuan X.,
Chen D.,
Luo Y.,
Yu K.
Publication year - 2013
Publication title -
chemical engineering and technology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.403
H-Index - 81
eISSN - 1521-4125
pISSN - 0930-7516
DOI - 10.1002/ceat.201300107
Subject(s) - distillation , capital cost , heat transfer , capital investment , fractionating column , process engineering , heat pump , investment (military) , column (typography) , environmental science , heat exchanger , thermodynamics , chemistry , engineering , mechanical engineering , economics , chromatography , physics , finance , connection (principal bundle) , politics , political science , law , electrical engineering
Internally heat‐integrated distillation columns (HIDiCs) need heat transfer between the two column sections. Intermediate condensing and reboiling of the rectifying and stripping sections favor the reversibility of the separation process and lead to the increase of heat loads for the two sections but the heat transfer to cover the heat load is costly and generates major difficulties in design. A higher number of stages can reduce the heat load but will also raise the investment cost. The influence of increasing stage numbers on operating cost and capital investment of the HIDiC was evaluated by two HIDiC design cases, and the stage numbers or equivalently the heat loads were optimized to achieve the balance between the two kinds of cost.