Optimal Design and Operation of Complex Batch Distillation Column

Abstract

Abstract A new type of batch distillation column called a “complex batch distillation column” is proposed, and the characteristics of this column are studied. In the complex “batch distillation column, the feed is supplied to the middle of the column, and the liquid on the feed tray is recycled to the feed tank. The complex column is convenient for removing light and heavy impurities from the raw materials since the impurities could be withdrawn simultaneously from the top and the bottom. In this research, the complex column is regarded as a combined system of ordinary and stripping batch distillation columns where the condenser of the stripping column is heat-integrated with the reboilerof the ordinary column. First, the differences between the ordinary and stripping columns are clarified analytically. By using this result, the conditions at which the complex column works effectively compared with the ordinary batch distillation column are clarified.