Design of control structures of cumene process

Abstract

Nowadays, industries are very competitive. Therefore, the quality of products must be control according to industry standards. Moreover in order to control the unit cost of production to be low, so material and energy recycle are beneficial in economic aspect. They are the causes that make the process even more complicated, so the good control structure is necessary and is the important things in order to maintain process operation, safety and product quality. This research will focus on the control structure designed of cumene process consisting of recycle stream and energy integration by using procedure of Wongsri (2009). In this study, HYSYS is used to simulate cumene process at steady state and dynamic. After that we design new plantwide control structure for cumene process and evaluated the dynamic performance compare by integral absolute error (IAE) with base case control structure (Luyben 2010). Two types of disturbances: material and thermal disturbances are used to evaluate the performance. The result shows that new design control structures have comparable performance with the base case since they can handle entering disturbance of the process and can maintain product quality.