关键词: inverted batch distillation column;stripper;shortcut procedure

Abstract: Inverted batch distillation colunm(stripper) is opposed to a conventional batch
distillation column(rectifier). It has a storage vessel at the top and products leave the
column at the bottom. The batch stripper is favourable to separate mixtures with a small
amount of light components by removing the heavy components as bottom products. In this
paper, we are presenting a shortcut procedure based on our earlier work for design and
simulation of the inverted batch distillation column, which is equivalent to the Fenske-
Underwood-Gilliland procedure for continuous distillation. Given a separation task, we
propose to compute the minimum number of stages(Nbmin)and the minimum reboil ratio(Rbmin)
required in a batch stripper,which are the stages and reboil ratio required in a
hypothetical inverted batch distillation colnmn operating in total reboil ratio or having
an infinite number of stages,respectively. Then, it is shown that the performance of
inverted batch columns with a finite number of stages and reboil ratios could be correlated
in Gilliland coordinates with the minimum stages Nbmin and the minimum reboil ratio Rbmin.

Key words: inverted batch distillation column, stripper, shortcut procedure