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精馏是1种重要的高成本的工业单元操作,其操作费用及设备投资费用主要和进料位置、回流比及塔板数有关。然而,过程参数对精馏操作费用和设备投资费用的影响是复杂的,且参数之间有着强耦合关系。因此本文结合丙二醇脱水塔过程参数的优化实例,引入正交试验设计思想,基于Aspen Plus的模拟结果,确定精馏过程的年度化总费用,通过正交数值试验,实现参数优化,并验证了以上方法的可行性和有效性。结果表明,依据基于正交数值试验得到的精馏过程最优参数进行设计,即第6块板进料,回流比为1,塔板数为9,可使丙二醇脱水塔年度化总费用比现行工程实际年度化总费用降低0.35%,从而弥补了依次进行单参数优化方法中的缺陷,达到了节能降耗的目的。
Distillation is an important high-cost industrial unit operation, the operating costs and equipment investment costs and feed location, reflux ratio and the number of trays. However, the influence of process parameters on the cost of distillation operation and equipment investment is complex and there is a strong coupling between the parameters. Therefore, this paper combined the optimization of propylene glycol dehydration tower process parameters, the introduction of orthogonal design ideas, based on Aspen Plus simulation results to determine the total cost of the distillation process, through orthogonal numerical experiments to achieve parameter optimization and verify that the above The feasibility and effectiveness of the method. The results show that according to the optimal parameters of the distillation process based on orthogonal numerical experiments, the sixth plate feed, the reflux ratio is 1, the plate number is 9, the annual total cost of the propylene glycol dehydration tower can be higher than the current The actual annualized total cost of the project is reduced by 0.35%, thus making up for the defects in the single parameter optimization method in turn and achieving the goal of saving energy and reducing consumption.