摘要
针对分批萃取精馏严格模型计算量大,适应性差等缺点,提出一种适合分批萃取精馏的快捷模型。该模型将整个分批萃取精馏过程分割为众多连续的小区间即"时间步长"。在每个微小的"时间步长"内,精馏过程都为连续的稳态过程。实验选择了0.02h,可满足计算的精度和时间要求。通过甲醇-丙酮-水与乙醇-水-乙二醇两个实例,对快捷模型的计算结果与实验值、文献值分别进行了比较,其结果令人满意,最大误差在3%以内。提出的快捷模型具有稳定、快捷、实用的特点,在设计和产品规划决策阶段可以方便地估算和优化分批萃取精馏问题。
A new shortcut model was proposed to simulate the operation of the batch extractive distillation operations to overcome the obstacles of over-complexity and bad adaptability of rigorous model. The whole batch process is simulated as a succession of a finite number of steady states of short duration, the duration of 0.02 h was chosen to meet the terms of accuracy and calculation time requirements. The practical implementation of the novel shortcut model was discussed through the example of methanol acetone-water and ethanol-water glycol system. Laboratory and literature results from shortcut model were compared and the largest error was below 3% for laboratory and literature resuhs. This model has indeed better steady state, less calculative load and adaptability. It can be conveniently used in the future to estimate and optimize batch extractive distillation in the design and product planning stages.
出处
《石油化工高等学校学报》
CAS
2008年第1期38-41,73,共5页
Journal of Petrochemical Universities
基金
福建省教育厅科研项目基金(JB06048)
关键词
分批萃取精馏
模拟
快捷模型
Batch extractive distillation
Simulation
Shortcut model
