Abstract:

The present work deals with studying the dynamic behaviour of continuous distillation tray column and implementing different type of control strategies for the separation of binary mixture composed of ethanol and water. Mathematical model of distillation column is derived and designed by using Matlab program depending on the mathematical model derived to find temperature response for many disturbances. The comparison between the experimental and theoretical responses for temperature in top and bottom of distillation column for step change in feed flow rate, reflux ratio and feed weight fraction showed that the difference is simple. This study includes designing fuzzy logic controller which depending on some of logic rules depending on fuzzy sets and through trading from experimental works where designing this controller by using Matlab program and applying it on dynamics model for two control scheme and tuning it by trial and error method. The Comparison between fuzzy logic and (PID) control methods is done for many disturbances and measure the controller performance by using mean square error and integral square error that the result performance showed that the fuzzy controller better than the conventional controller through fast access to the desired value and cancelling the disturbances.

Keywords: