A Note on a Double Temperature-Cascade Control Strategy for Distillation Columns
Author:
Urrea-Garcìa Galo R,Alvarez-Ramirez Jose,Luna-Solano Guadalupe,Bolaños-Reynoso Eusebio
Abstract
A double temperature-cascade control strategy for controlling distillate composition is proposed. The control structure is based on two secondary loops that are designed for tracking the temperature of one tray in the rectifying and stripping section by manipulation of the reflux rate and reboiler heat input, respectively. Simulation results show that when saturations are imposed on controller outputs (reflux rate and heat input) both cascade controllers can act in a switching-like scheme without interaction problems. It is also shown that an adequate setting of a saturation parameter allows a low energy regulation of distillate composition under disturbances in feed composition.
Publisher
Walter de Gruyter GmbH
Subject
Modeling and Simulation,General Chemical Engineering
Reference1 articles.
1. Seader Separation Process Principles A nonlinear profile observer using tray temperatures for high - purity binary distillation columns;Henley;USA Chem Eng Sci,1998