Control structures design applied to alkylation process plantwide control

Abstract

Design a process control structure for a complex process, such as the process having material or energy recycle, is a complicate task. The design control loop would effect the operation significantly. The study is using plantwide control strategies for designing control structure of Isobutane process control. This structure process design is to achieve the efficiency in control and reduce disturbances in process by using the new process structure design by Wongsri (2009) compare to the basic heuristic structure design by Luben (2002). Disturbances are set up by two categories; flow rate of substances and temperature changed in fresh feed. The result shows that control structure designs based on Wongsri heuristic are better performance than Luben in both sustain in quality and minimize the power efficiency. Evaluate such simulation by HYSYS commercial software.