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通过Aspen Plus化工模拟软件,对乙酸正丁酯体系进行了稳态模拟。使用合适的热力学方法和动力学方程。模拟过程是乙酸和正丁醇先在管式反应器中反应,然后通过精馏塔分离,得到目的产物乙酸正丁酯。考察了进料位置、回流比、全塔理论板数等因素对分离效果的影响。得到模拟优化和经济优化的结果:塔一的全塔理论板数为18,进料位置为第9块理论板,回流比1.23,全年总费用45万美元;塔二的全塔理论板数为60,进料位置为第14块理论板,回流比3.66,全年总费用75万美元。在这个工艺条件下,得到的产品乙酸正丁酯的质量分数达到了99.8%。
The steady-state simulation of n-butyl acetate system was carried out by using Aspen Plus chemical simulation software. Use appropriate thermodynamic methods and kinetic equations. The simulation process is that acetic acid and n-butanol are first reacted in a tubular reactor and then separated by a rectification tower to obtain the desired product n-butyl acetate. The effect of factors such as feed position, reflux ratio, number of plates in the whole tower on the separation efficiency was investigated. Obtained the results of simulation optimization and economic optimization: Tower one of the tower theoretical plate number 18, the feed position for the first nine theoretical plates, the reflux ratio of 1.23, the annual total cost 450,000 US dollars; tower two tower theoretical plate number 60, the feed position for the first 14 theoretical plates, reflux ratio of 3.66, the annual total cost of 750,000 US dollars. In this process conditions, the product obtained n-butyl acetate mass fraction of 99.8%.