Abstract:

A different pressure thermally coupled distillation technology was developed to achieve energy saving. In this technology，a distillation column was divided to two columns with different pressure. The top stream from the high-pressure column was used as the heat energy for the reboiling of the low-pressure column，therefore the thermal coupled process was realized. Computer simulation technology has been used to analyze the energy saving of different pressure thermally coupled distillation technology in separation of propane-propylene and C4’s hydrocarbon respectively. The results showed that，comparing with ordinary distillation technology，energy consuming could be reduced about 92.3％ and 87.1％ in these two separation process，respectively.

摘要： 开发了一种广泛适用于蒸馏分离过程的新型差压热耦合蒸馏技术，该技术将精馏塔分割为两个压力不同的塔，利用高压塔顶蒸汽作为低压塔底的热源，实现热能的耦合匹配，达到蒸馏过程大幅度节能的目的。利用计算机模拟方法对该技术应用在丙烯-丙烷分离和混合C4分离过程中的节能效果进行了计算和分析，结果表明与现有常规蒸馏过程相比，差压热耦合低能耗蒸馏过程能耗可以分别降低92.3％和87.1％，节能效果显著。