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A method for the design of flexible distillation sequence
Author(s) -
Wagler R. M.,
Douglas P. L.
Publication year - 1988
Publication title -
the canadian journal of chemical engineering
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.404
H-Index - 67
eISSN - 1939-019X
pISSN - 0008-4034
DOI - 10.1002/cjce.5450660408
Subject(s) - distillation , flexibility (engineering) , sequence (biology) , fractionating column , optimal design , process engineering , computer science , range (aeronautics) , mathematics , mathematical optimization , chemistry , engineering , chromatography , statistics , biochemistry , aerospace engineering
A simple method has been developed to optimally design a distillation sequence with a fixed degree of flexibility in feed composition and flowrate, and accounts for uncertainty in stage efficiency, K ‐value and beat transfer coefficient calculations. The method minimizes a weighted cost function and ensures both optimal and feasible operation in the range of flexibility/uncertainty by using an approach termed “practical feasibility”. The method was tested on a 4 column distillation sequence separating a 5 component light alkane feed mixture. Results are presented to illustrate the effect of uncertainty on sequence cost and column overdesign.
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