摘要
基于苯和乙醇共沸组成对压力敏感性的变化,提出了变压精馏与热集成相结合的方法对苯和乙醇共沸体系进行了流程模拟,并对各塔的关键参数进行优化设计,得到了最佳的工艺操作参数:高压塔的理论板数为20,进料位置为第10块理论板,回流比为10,塔顶采出量为902 kg/h,操作压力为1.0 MPa;常压塔理论板数为18,进料位置为第10块理论板,回流比为5,塔顶采出量为569.5 kg/h,操作压力为0.1 MPa;得到了苯和乙醇的质量分数分别为99.02%和95.23%。采用热量集成的方法,可降低常压塔塔顶循环物流的加热能耗34.1 kW。
Based on the change of sensitivity of the benzene and ethanol azeotropic composition to pressure,a method combining pressure swing distillation and thermal integration was proposed to simulate the process of benzene and ethanol azeotrope system,and the key parameters of each column were optimized,and the optimal process operation parameters were obtained:theoretical plates number of the high pressure tower was 20,feed position was the 10 th theoretical plate,reflux ratio was 10,top recovery was 902 kg/h,operating pressure was 1.0 MPa.Theoretical plate number of the atmospheric tower was 18,feed position was the 10 th theoretical plate,reflux ratio was 5,top recovery was 569.5 kg/h,operating pressure was 0.1 MPa.The mass fractions of benzene and ethanol were 99.02%and 95.23%.The heating energy consumption for the circulating stream at the top of the atmospheric tower was reduced by 34.1 kW.
作者
李政
Li Zheng(Research Institute of Qilu Branch,Co.,SINOPEC,Zibo Shandong 255400)
出处
《齐鲁石油化工》
2022年第1期59-62,共4页
Qilu Petrochemical Technology
关键词
苯
乙醇
变压精馏
热集成
benzene
ethanol
pressure swing distillation
thermal integration
