醋酐精馏工艺模拟计算与优化设计  

Simulation and optimization design of distillation process for acetic anhydride

作　　者：李武东[1] 黄前程[1] 朱志亮[1] 

机构地区：[1]上海化工研究院国家高效分离塔填料及装置技术研究推广中心,上海200062

出　　处：《现代化工》2016年第7期181-185,共5页Modern Chemical Industry

摘　　要：以醋酐精馏装置为研究对象,对其精馏工艺流程进行了模拟计算与优化分析。对工厂实际流程进行模拟计算,确定了模型的可行性和合理性;根据计算结果优化了现有三塔流程,确定醋酸塔理论板数和进料位置分别为32和10,醋酐塔为20和8,双醋酸亚乙酯(EDA)塔为10和5,又对塔顶压力分别为20、30、40 k Pa的工况进行了模拟计算,得到结论,操作压力越低,能耗也越低;分析了醋酐塔和EDA塔塔釜出料组成,改进为两塔流程,并进行了优化分析,提出了2种不同操作压力(20、30 k Pa)下的优化方案,分别比原三塔流程能耗降低14.7%和3.4%,改造后新的20 k Pa两塔流程操作能耗较原三塔流程降低13.9%。Taking a set of acetic anhydride distillation device as the object,the simulation and optimization analysis of the process are accomplished. The feasibility and rationality of the model are also determined. The results show that,for acetic anhydride tower,the total theoretical plate number and the feed plate number are ascertained as 32 and 10,respectively. The total theoretical plate number and the feed plate number are 10 and 5,respectively,for EDA tower. Then the conditions with top pressures at 20 k Pa,30 k Pa and 40 k Pa are simulated. The results indicate that the lower operating pressure,the lower energy consumption. The components from the bottom of acetic anhydride tower and EDA tower are further analyzed and the two-tower process is proposed,simulated and optimized. The optimal schemes at two different operating pressure（20 k Pa and 30 k Pa） are subsequently put forward,which can reduce energy consumption by14. 7% and 3. 4%,respectively,in comparison with the original three-tower process. The energy consumption under the new operating condition is reduced by 13. 9% compared with the old three-tower process.

关 键 词：醋酐精馏 热敏性 模拟计算 优化分析 两塔流程 能耗 

分 类 号：TQ028.3[化学工程]