Abstract

The best regulatory control structure is determined for an industrial, multicomponent, high purity ethylbenzene distillation column with 50 trays. Steady-state plant data and the design information is utilized with a steady-state model of the column. The column-model match is obtained by adjusting the column efficiency. Dynamic column behaviour is experimentally obtained by pulse and step testing. Steady-state rating programs are used to obtain the steady-state process and disturbance gain matrices of the (L, V), (D, V), (L, B) and (L/D, V/B) control configurations. Steady-state control configuration selection methods RI, RGA, NI, MRI, JEC, SVD and RDG and the Eigenstructure concept are made use of.Single-end and dual composition control of the column is examined by IMC based PI controllers. The results revealed that for feed flow rate and composition disturbances, column can be controlled with a single-end structure.

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