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Interaction in two-variable control systems for distillation columns—II: Application of theory

✍ Scribed by J.E. Rijnsdorp

Publisher
Elsevier Science
Year
1965
Tongue
English
Weight
1010 KB
Volume
3
Category
Article
ISSN
0005-1098

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✦ Synopsis

Sin-mary--The theory developed in part I is applied to the following two-variable control systems for distillation columns:

(a) pressure control by condenser cooling, and temperature control by reboiler heating; (b) overhead quality control by reflux, and bottom quality control by reboiler heating. Approximation formulae are derived for the interaction quotient x. These are compared to results from a simulation on an analogue computer. Moreover, attention is paid to the effect of vapour flow variations on the liquid overflow, and its influcmce on the interaction. Finally, various ways of avoiding unfavourable interaction are discussed and compared.

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