Abstract

SOLAR-GONZALEZ, R.; MONROY-LOPERENA, R.  and  ALVAREZ-RAMIREZ, J.. Ternary Systems Control with Two Recycle Steams. Ing. invest. y tecnol. [online]. 2010, vol.11, n.4, pp.403-412. ISSN 2594-0732.

In the literature, the use of parallel control structure to improve the control behavior of plantwide de signs has been study. In this work, we consider the behavior of a plant that consists of a recycle system, a reactor and two distillation columns where the control aim is to improve the disturbance rejection capabilities of the controlled process. The idea is to change the operating conditions in both the reactor and the second distillation column in order to distribute the composition control effort in the face of fresh feed composition disturbances. To this end, a parallel control structure is proposed where the product composition is regulated by means of simultaneous feed back manipulations of the vapor boilup rate of the second column and there actor temperature. In this way, the use of the reactor temperature as a secondary control in put reduces oscillatory behavior and the vapour flowrate us age.

Keywords : Plantwide control; material recycle; parallel control; composition control.