Abstract: The three-component alcohol batch distillation process was simulated by the Thomas method based on ASOG phase equilibrium theory.The distortion of the simulation results was effectively avoided by using an accurate verifying method.Experimental results showed that the mathematical model is accurate and the numerical method is reliable.The objective function for economic benefits per time unit was proposed，and the effects of reflux ratio and theoretical plate number on economic benefits per time unit were discussed.In conclusion the optimal reflux ratio and the optimal theoretical plate number were 5.5 and 20 respectively under the given condition.

摘要： 在ASOG相平衡理论的基础上，利用托马斯法（Thomas）模拟三元醇类间歇精馏过程，用精确校正法防止模拟结果的失真现象.实验结果证明了数学模型的正确性及计算方法的可靠性.定义了单位时间经济效益目标函数，并讨论了回流比和理论板数对单位时间经济效益的影响关系，得出了在给定条件下的最佳回流比为5.5，最佳操作理论板数为20的结论.