EXPERIMENTAL AND THEORETICAL-STUDIES OF THE DYNAMICS OF STARTUP AND PRODUCT SWITCHOVER OPERATIONS OF DISTILLATION-COLUMNS

Experimental studies have been made with the help of laboratory-scale distillation columns of the startup and product switchover operations of distillation columns. The object of these studies was to minimize t he time necessary from initial startup or product switchover for stead y-state operations to be attained. It has been shown that the time nee ded can be clearly reduced by a specific mode of operation. Theoretica l studies support the experimental findings. Dynamic simulation has pr oved to be a suitable aid for the preparation and planning of experime ntal studies. As a result, the time needed to reach steady state can b e considerably reduced, and consequently the costs.