Start-up of Empty Cold Reactive Distillation Columns by means of Feedback Control Strategies: the Discontinuous Stage
نویسندگان
چکیده
A new approach for start-up of empty cold reactive distillation columns by means of feedback control strategies is presented. In this paper, the discontinuous stage of startup is taken into account. This stage begins with the fill-up and heating process of the empty cold column and ends if vapour reaches the condenser. A corresponding model for the start-up process is developed. The control strategy is based on servo-control of the process variables temperature and liquid level of the reboiler with PI controllers and is combined with bottom product recycling. The proposed strategy is demonstrated and tested with the reactive distillation process of esterification of ethanol with acetic acid.
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