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双塔精馏广泛应用于均相共沸物的分离,分离效果可以达到99.5%以上。介绍了双塔变压精馏的原理以及在工业生产中的应用情况,并以四氢呋喃(THF)与水的分离为例,介绍了双塔精馏开车操作过程,影响双塔精馏效果的主要因素,造成产品不合格的原因。针对双塔变压精馏的使用,介绍了减少开车时间的经验。并对双塔精馏如何实现节能进行了介绍。
Double column distillation is widely used in the separation of homogeneous azeotrope, the separation effect can reach more than 99.5%. This paper introduces the principle of double-column pressure swing distillation and its application in industrial production. Taking the separation of THF and water as an example, this paper introduces the operation process of double-column distillation and the main influencing factors of double-column distillation Factors that cause the product failed. For the use of dual-column pressure swing distillation, introduced the experience of reducing driving time. And how to achieve double-column distillation energy-saving introduced.