To accommodate the modification works of Qilu 720,000 ton ethene per year plant, the depentanizing and BTX column in prefraction system of tri-hydrogenation unit were designed.

• 为了适应齐鲁72万吨/年乙烯改造工程，本文对三加氢装置预分馏系统脱戊烷塔、BTX塔进行了工艺设计。