Closed-loop Implementation of OptimalTrajectories in Batch Distillation

摘要

In order to implement a quasi-optimal trajectory derived from pinch theory[1,2], a temperature tracking control system composed by an open-loop refluxratio control plus a closed-loop correction for disturbance rejection is proposed.To adjust the closed-loop controller we use the referential dynamic reaction ofthe process [3] and tuning rules [4] that, though they were originally developedfor dynamics valid in the neighborhood of stationary operating points, underthis strategy they are useful in the neighborhood of a reference transientevolution like those occurring in batch distillation columns. The separation ofthe light component from its ternary mixture of alcohols is studied here.