Rigorous dynamics and feedforward control design for distillation processes

✍ Scribed by Maurizio Rovaglio; Eliseo Ranzi; Giuseppe Biardi; Marco Fontana; Rosa Domenichini

• Publisher: American Institute of Chemical Engineers
• Year: 1990
• Tongue: English
• Weight: 761 KB
• Volume: 36
• Category: Article
• ISSN: 0001-1541
• DOI: 10.1002/aic.690360409

✦ Synopsis

Rigorous Dynamics and Feedforward Control Design for Distillation Processes

Feedforward control has the theoretical potential for perfect control; therefore, research to simplify and improve the use of such a control strategy for possible industrial applications has potential value. A general model for simulation of controlled distillation columns is used to reproduce operating trends of some monitored variables for an industrial column. Comparisons between simulated and operating data show a general good agreement.

When a rigorous model is available and car! be proved reliable for practical purposes, the design of feedforward control schemes becomes viable and can be incorporated in the more conventional approach. A specific industrial example shows the practical implementation problems and the real economic value of a feedforward control strategy to optimize the process behavior. In particular, the feedforward control action can reduce the inherent error from changes in feed composition when a basic feedback control structure is used to infer composition.