分隔壁塔分离苯和乙烯烷基化产物的模拟

发布时间：2017-12-28 06:42

本文关键词：分隔壁塔分离苯和乙烯烷基化产物的模拟　出处：《石油学报(石油加工)》2016年03期 　论文类型：期刊论文

【摘要】：研究了分隔壁精馏塔在分离苯和乙烯烷基化产物中的应用。采用Aspen Plus的Petlyuk模块对分隔壁精馏塔进行了模拟计算。首先采用等效三塔简捷模型计算分隔壁精馏塔的分壁段、主塔塔板数等参数,以此为基础,采用Petlyuk模型对分隔壁精馏塔进行严格计算,再采用Aspen的模型分析工具确定塔的最佳工艺参数。结果表明,对于乙烯和苯烷基化产物体系,采用分隔壁精馏塔分离的最佳参数为主塔理论塔板数58块、预分段理论塔板数25块,上、下端互联位置分别在15板、40板,进料位置在第10块板(预分段),侧线乙苯抽出位置在第24块板(基于主塔),主塔回流比1.3,互联物流液体流量500kmol/h,气体流量950kmol/h。在此参数下,计算得到的侧线采出乙苯质量分数为99.92%,满足乙苯产品的纯度要求。
[Abstract]:The application of separation wall distillation column in the separation of benzene and ethylene alkylation products was studied. The partition wall distillation column was simulated with the Petlyuk module of Aspen Plus. First, the equivalent three tower shortcut model is applied to calculate the parameters of the partition wall and the main tower plate of the fractionating wall distillation column. Based on this, the Petlyuk model is applied to calculate the fractionating wall distillation column strictly, and the best process parameters of the tower are determined by Aspen's model analysis tool. The results showed that the ethylene and benzene alkylation system, using the optimum parameters of the dividing wall column separation tower theoretical plate number of 58 pre segmented, the number of theoretical plates 25, upper and lower interconnection position respectively in the 15 plates, 40 plates, tenth plates in the feed position (pre segmented). The extracted position in twenty-fourth plates of ethylbenzene (based on the main tower tower), the reflux ratio was 1.3 and the Internet logistics liquid flow 500kmol/h, gas flow 950kmol/h. Under this parameter, the calculated mass fraction of ethylbenzene is 99.92%, which meets the purity requirements of ethylbenzene.
【作者单位】：中国石化石油化工科学研究院;
【分类号】：TQ028;TQ241.1
【正文快照】： 乙苯作为生产苯乙烯的中间体,其生产工艺主要有苯和乙烯的液相法[1-2]、气相法[3]及干气法[4-5]。乙苯生产装置主要由烷基化部分、烷基转移部分及产物分离部分组成。其中,分离过程通常采用顺序分离方法,将苯、乙苯、多乙苯等烷基化产物依次分离[6],从而得到高纯度的乙苯产品。

【参考文献】