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运用化工流程模拟软件Aspen Plus,对乙醇脱氢生产乙酸乙酯的工艺流程进行模拟计算分析,建立了10 wt/a乙酸乙酯生产工业过程的详细流程,最终乙酸乙酯产品纯度达99.98%,收率可达98.26%。对精馏工段关键的乙醇塔和粗塔组成的差压精馏体系进行了灵敏度分析,重点考察了进料板位置、回流比、塔顶采出量等工艺参数对精馏塔分离效果和操作能耗的影响,得到优化的参数,即乙醇塔新鲜进料板位置为第12块,循环物料进料位置为第9块,回流比2.10,塔顶采出量为33500 kg/hr:粗塔进料板位置为第9块,回流比为1.43,塔顶采出量为21000 kg/h。本文研究结果为工业上选择合适的设备参数和操作参数提供有力的数据支持。随后对原换热网络进行了进一步优化设计,节省能耗24.56%。
The chemical process simulation software Aspen Plus was used to simulate the process of ethyl acetate production by ethanol dehydrogenation. The detailed process of 10 wt / a ethyl acetate production process was established. The purity of ethyl acetate product reached 99.98% Yield up to 98.26%. The sensitivity analysis of the differential pressure distillation system composed of the key ethanol column and the crude column in the rectification section was carried out. The effects of the process parameters such as the position of the feed plate, the reflux ratio and the amount of overhead extraction on the separation efficiency and operation of the rectification column Energy consumption, the optimal parameters were obtained, that is, the fresh feed plate of ethanol column is located at the 12th position, the feed of recycled material is at the 9th position, the reflux ratio is 2.10, and the top extraction volume is 33500 kg / hr. The crude column Feed plate position for the first 9, the reflux ratio was 1.43, the top of the amount of 21000 kg / h. The results of this paper provide strong data support for choosing suitable equipment parameters and operating parameters in industry. Then the original heat transfer network was further optimized design, saving energy 24.56%.