醋酸戊酯差压热耦合反应精馏过程的节能优化

Energy-Saving Optimization on Differential Pressure Thermally Coupled Reactive Distillation Process of n-Amyl Acetate

为了实现醋酸戊酯反应精馏系统反应-分离-能量集成的优化设计,建立了差压热耦合反应精馏(DPTRD)新工艺。采用Aspen软件对DPT-RD流程进行模拟,考察了塔板持液量、降压分馏塔压力、HAc进料位置、两塔耦合方式等对DPT-RD过程的影响。结果表明,在塔板持液量为0.25m3、降压分馏塔压力为0.16bar、HAc第6块板进料、常规分馏塔塔板数为24的最优条件下,DPT-RD比常规反应精馏节能约78.22%,节能效果显著。

In order to realize the optimal design of reaction-separation-energy integration for a reactive distillation system of n-amyl acetate, a novel process of differential pressure thermally coupled reactive distillation （DPT-RD） was established. The DPT-RD process was simulated with Aspen software,and the effects of the parameters on DPT-RD process were investigated, including the tray liquid holdup, the pressure of pressure-reducing distillation tower,the HAc feed location,and the two towers coupling mode. Results showed that,the total energy consumption of DPT-RD process reduced by 78. 22% compared with the conventional reactive distillation under the optimal conditions as follows., the tray liquid holdup was 0.25 m^3 ,the pressure of pressure-reducing distillation tower was 0.16 bar, the HAc feed location was the sixth plate,and the plate number of atmospheric distillation tower was 24.