隔壁精馏塔的设计、模拟与优化

针对隔壁精馏塔节能工艺,提供了一套完整的设计优化方法.首先基于Fenske-Underwood-GillilandKirkbride方程建立了完整的简捷设计方法,得到了隔壁精馏塔塔实际理论板数、适宜的进料位置、侧线采出位置及回流比等参数.然后在简捷计算的基础之上,选用Multifrac模型对隔壁塔进行了严格计算模拟,同时利用Aspen Plus进行单因素优化分析得到最优设计参数.最后利用响应面优化法(RSM)中的箱线图设计(BBD)方法对隔壁精馏塔设计参数进行了实验设计,在验证模型有效的基础上运用Design-Expert软件进行数据处理,预测出了最优设计参数,并将预测值进行实验验证,将验证结果与单因素优化结果进行对比,结果表明响应面优化法得到的最优设计参数使隔壁塔的能耗较低、纯度较高.

Design,Simulation and Optimization of Divided Wall Column

A set of comprehensive methods was proposed for the design and optimization of divided wall col- umn （DWC）. A short-cut design method based on Fenske-Underwood-Gilliland-Kirkbride equations for DWC was used to get initial values of design parameters of theoretical stages, feed stage, side-product stage, reflux ratio and so on. With the initial values of all parameters from short-cut design, rigorous simulation of DWC was carried out using Multifrac model. The optimization result was obtained through single-factor experiment using Aspen Plus. In the last stage, Box-Behnken design （BBD）under response surface methodology （RSM）was used for the optimization of DWC and to evaluate the effects of parameters and their interactions on energy efficiency and product purity. Design- Expert software was used to tackle experiment data and predict optimization result based on significant model. Comparing the optimization result of single-factor experiment and RSM, we found that RSM could render more optimized result in respect of energy saving and high purity.