烷烃分离热偶精馏的模拟研究  

Simulation Study of Petlyuk System for Alkyl Distillation

作　　者：杨德明[1] 

机构地区：[1]江苏石油化工学院化工系,江苏常州213016

出　　处：《石油化工高等学校学报》2002年第3期25-27,35,共4页Journal of Petrochemical Universities

摘　　要：选用ASPENPLUS软件中的严格精馏模型 (Radfrac) ,模拟计算了烷烃分离的常规精馏过程 ,得到了常规精馏输入总热量为 3 .0 2× 1 0 7kJ·h- 1 ,分离过程的力学效率为 2 8.6 %。在此基础上提出了该分离物系的热偶精馏系统 ,并利用ASPENPLUS软件中的多塔精馏模型 (Multifrac)对热偶精馏的多解现象进行了模拟计算和探讨 ,再由灵敏度分析模块 (Sensitivity)确定了能耗最小、操作稳定的最佳设计条件 ,即当回流比为 5 .0时 ,取内连气相流股流量为 2 1 9.3kmol·h- 1 ,内连液相流股流量为 1 75 .6kmol·h- 1 。在以上设计条件下该热偶精馏输入总热量为 2 .0 7× 1 0 7kJ·h- 1 ,热力学效率为 37.2 %。结果表明 ,烷烃分离的热偶精馏可以节约供热量 31 .5 % ,热力学效率可以提高8.6 %。The simulations of conventional distillation for alkyl were performed based on the 'radfrac' model of Aspen Plus, and the results show that the energy consume is 3.02×10 7 kJ·h -1 , the thermodynamics efficiency is 28.6%. The petlyuk system for alkyl distillation was presented based on the conventional results, and the multi-answers phenomena were discussed based on the 'multifrac' model of Aspen Plus. The optimal design conditions for the petlyuk system were determined by the analysis of sensitivity, i.e. reflux is 5.0, the interlinked vapor flow 2 193 kmol/h, the interlinked liquid flow 175.6 kmol/h, the energy consume 2.07×10 7 kJ·h -1 and the thermodynamics efficiency is 37.2%. The simulation results show that the petlyuk system can save energy consumption by 31.5%, and increase the thermodynamics efficiency by 8.6% compared with the conventional distillation.

关 键 词：烷烃 分离 热偶精馏 模拟 研究 ASPEN PLUS软件 热力学效率 

分 类 号：TQ221.1[化学工程—有机化工]