Contribution to improve the dynamic control of a binary distillation column

Abstract

Conventionally, steady state design for distillation column is often completed before dynamics and control issues are considered. The aim of this paper is to use the design issues as a tool to improve dynamic behavior of binary distillation column. The idea is augmenting the liquid holdup in the feed plate through a middle vessel. The degree of interactions between the loops are examined for five well known control schemes by considering different quantities of liquid holdup in the feed plate. Simulation results show that augmenting the hold-up in the feed plate will lead to minimize the interactions between the loops in all cases particularly for DV control scheme where a total decoupling is achieved.

Development of the Feed Part Control System for Rectification Process

“…Feed quantity, temperature, pressure and material balance are the important factors that affect the rectifying column [3]. For the feed flow, the method to increase the liquid holdup in the feed plate through a middle vessel has been proposed [4]. The choice of the feed temperature should be considered from the perspectives of both the total annual cost and the dynamic control performance [5].…”