PLANTWIDE CONTROL STRUCTURE DESIGN FOR BUTANE ISOMERIZATION PROCESS

Abstract

This work describes the application of the plantwide control design procedure of Wongsri (Wongsri, 2015) and the butane isomerization process. The significance of the procedure is the use of quantifiers and their handlers to design plant level quantifier (inventory) control to stabilize the material flow. Next to maintain the quality of the products, the material and heat disturbance management are used to design for plant level disturbance rejection loops for dynamic efficiency. The column control loops are designed to shift plus and minus disturbance in the desired direction. Then the unit level loop design is carried out. The plant equipped with this designed control structure is called a Fixture Plant. The new design is compared with Luyben’s design.