针对双塔精馏回收环己醇工艺，采用Fenske-Underwood-Gilliland-Kirkbride方程和RadFrac模块对双塔进行简捷设计和严格模拟，保证预分离塔条件不变，利用响应面优化法（RSM）对萃取精馏塔的设计参数进行实验设计，得到最终优化的操作条件：预分离塔板数N₁=28，环己醇进料流量F=440 kg/h，操作压力P₁=-0.007 5 MPa，回流比R₁=6.5；萃取精馏塔塔板数N₂=22，操作压力P₂=96.401 kPa，回流比R₂=2.49，萃取剂水质量分数为0.36。在最佳操作条件下，塔顶环己醇质量分数为95.9%，环己醇回收率为84.2%，投资成本5.34×10⁶元，运行成本为2.19×10⁶元，为环己醇回收工艺提供模型和数据基础。

The Fenske-Underwood-Gilliland-Kirkbride equation and the RadFrac module are used to design and rigorously simulate the twin towers as for the cyclohexanol recovery process.Basing on the pre-separation tower conditions remaining unchanged,the design parameters of the extractive distillation tower are experimentally designed by using the response surface method (RSM).The final optimized operating conditions are obtained as follows:the number of pre-separation tower plates N₁=28,the feed flow rate of cyclohexanol F=440 kg·h^-1,the operating pressure P₁=-0.007 5 MPa,the reflux ratio R₁=6.5;the number of extraction distillation tower plates N₂=22,the operating pressure P₂=96.401 kPa,reflux ratio R₂=2.49,water content in extractant is 0.36.Under the optimum operating conditions,the mass fraction of cyclohexanol at top of tower is 95.9%,the recovery rate of cyclohexanol is 84.2%,the investment cost is RMB 5.34 million,and the running cost is RMB 2.19 million.This paper provides models and data for cyclohexanol recovery process.

杨涛(1990-),男,硕士生