摘要
采用Aspen Plus软件,以塔釜能耗为目标,以甲醇、丙酮纯度为约束函数,对双效变压精馏分离甲醇-丙酮工艺过程进行模拟。分析了操作压力、理论板数、回流比、进料位置和进料温度等参数对精馏过程的影响。确定了最优工艺参数:减压塔操作压力40 kPa,理论板数37,回流比2.4,进料塔板数26,进料温度25℃;常压塔理论板数30,回流比4.2,进料塔板数23。减压塔所得甲醇质量分数为99.0%,常压塔所得丙酮质量分数为99.7%。对比变压精馏和萃取精馏过程,变压精馏更容易得到高纯度丙酮产品,节能约13.4%。模拟结果对工业设计和设备改造具有一定指导意义。
Methanol and acetone can form a minimum azeotrope,so it can not be separated by conventional distillation. Press-swing distillation was adopted to separate methanol and acetone and was simulated in this study. The influences of operation factors,such as stage number,reflux ratio,operating pressure,material feed location and feed temperature were analyzed. The vacuum tower operation parameters were as follows：operating pressure 40 kPa,stage number 37,reflux ratio 2.4,feed location 26 and material feed temperature 25 ℃. The atmospheric tower operation parameters were as follows：stage number 30,reflux ratio 4.2,feed location 23. High-purity separation could be realized. The purity of methanol could reach 99.0% and acetone could reach 99.7%. Comparison of extractive distillation and press-swing distillation was made. Press-swing distillation could get high purity products. Press-swing distillation could save energy by 13.4% as compared with extractive distillation.
出处
《化工进展》
EI
CAS
CSCD
北大核心
2013年第11期2583-2587,共5页
Chemical Industry and Engineering Progress
关键词
甲醇
丙酮
变压精馏
优化模拟
methanol
acetone
press-swingdistillation
optimization simulation
