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为解决带有中间贮罐的间歇精馏塔蒸馏顺序的问题，对上下塔段采用对称的计算方法，以上下塔段轻重组份蒸出时间为依据，确定中间组份序号。算法简便，在分离多组份物料时能确定合理的出料顺序。
In order to solve the problem of the distillation order of the batch distillation column with the intermediate tank, symmetrical calculation method is used for the upper and lower tower sections, and the middle component numbers are determined on the basis of the evaporation time of the light weight component of the upper and lower tower sections. The algorithm is simple and easy to determine a reasonable order of discharge in the separation of multi-component materials.