Distillation

Introduction Distillation separates chemicals by the difference in how easily they vaporize. The two major types of classical distillation include continuous distillation and batch distillation.Continuous distillation, as the name says, continuously takes a feed and separates it into two or more products. Batch distillation takes on lot (or batch) at a time of feed and…

Pinch Targeting Software

1     Options available It was originally hoped that pinch analysis techniques would allow energy targets to be found using only a pocket calculator. Sadly, this is not true except for the very simplest plants. Hand calculation is tedious and there is a high risk of mistakes. Computer software is therefore almost essential to perform a…

Column Sizing Using HYSYS or UniSim

HYSYS/UniSim includes a utility to calculate diameter, height, pressure drop, etc. for gas-liquid columns.  (Note that the default 1.5 m diameter has no relationship to reality, and should never be used.) Following is the procedure for tray columns, after you have obtained a converged column design.  For packed columns, the column height is the number of…