以乙醇-正丙醇-正丁醇为分离体系，研究回流比、气液分配比等操作参数对隔壁塔分离效果的影响。将常规双塔精馏序列转化为隔壁精馏序列并保证各操作参数的最优值，利用Aspen Plus模拟软件对乙醇-正丙醇-正丁醇三组元的常规精馏序列和隔壁塔精馏序列进行模拟分析，探究隔壁精馏工艺最佳操作区域及节能效果，模拟结果表明，在满足分离要求下，气液分配比存在一个相互关联关系，使隔壁塔精馏序列存在一个再沸器热负荷最小的最佳操作区域。与常规精馏序列相比，完成相同的分离任务，隔壁塔精馏序列再沸器节能6 954.368 kW，冷凝器热负荷减少2 934.291 kW。结果表明，隔壁塔精馏序列不但提高了热力学效率、降低了能耗，并且大幅降低设备投资。

The effects of reflux ratio,gas-liquid ratio and other operation parameters on the separation efficiency of dividing wall column (DWC) are studied by taking ethanol-n-propanol-n-butanol mixture as separation objective.The conventional two-column distillation sequence is transformed into the DWC distillation sequence while various operation parameters are ensured at the optimal values.Both the conventional two-column and DWC distillation sequences for the three-component mixture of ethanol-n-propanol-n-butanol are simulated with Aspen Plus to explore the optimum operation region and energy conversation efficiency for DWC distillation process.The result demonstrates there is an inter-related relationship between R_V and R_L under the premise of meeting separation requirements,which causes the DWC distillation sequence to have an optimum operation region where the heat load of reboiler is the minimum.Compared with the conventional two-column distillation sequence,the reboiler and the condenser of DWC distillation sequence can save energy by 6 954.368 kW and 2 934.291 kW,respectively when completing the same separation task.The results show that DWC distillation sequence improves the thermodynamic efficiency,reduces the energy consumption and cut down greatly the equipment investment.

杨兵兵(1993-),男,硕士生。