利用Aspen Plus模拟软件,建立了分离丙酮-乙醇-水物系的隔壁塔工艺流程.在保证丙酮产品纯度不低于99.2％的前提下,使用响应面法分析了隔壁塔的结构参数对能耗的影响,拟合出塔结构参数与再沸器热负荷的二次方程,对隔壁塔的结构参数进行了优化.优化结果为:预分离段、公共精馏段、公共提馏段和侧线采出段的理论塔板数分别为22,20,19,18;预分离段的进料位置为第16塔板,公共提馏段的再沸器热负荷为405.63 kW.验证结果显示,优化结果与模拟结果的相对误差为0.65％,说明流程模拟与响应面法相结合用于隔壁塔结构参数的优化可行.与传统工艺相比,隔壁塔分离工艺的设备费用降低26.86％、年度总费用降低41.10％.%A dividing-wall column(DWC) process for the separation of the acetone-ethanol-water system was established by means of the Aspen Plus software. Based on the premise of the mass fraction of acetone in the products not less than 99.2％,the influences of the structural parameters of DWC on the reboiler heat duty were analyzed using the response surface method and a quadratic equation was obtained. It was showed that,the theoretical plate numbers of the prefractionation section, public rectifying section,public stripping section and side draw section were 22,20,19 and 18 respectively,the feeding position of the prefractionation section was at the 16th plate,and the reboiler heat duty of the public stripping section was 405.63 kW. The relative error between the optimized result and the simulation result was 0.65％. Compared to traditional process,the capital cost and total annual cost of DWC were reduced by 26.86％ and 41.10％,respectively.
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