Development of a dynamic simulator for distillation of vapor-liquid-liquid systems with packed columns

本工作的最终目的是开发一个蒸汽-液-液系统蒸馏的动态模拟器，即填料塔的非均相蒸馏。由于填充塔的模拟器需要传热和传质模型，因此在具有结构填料的填充塔的非均相蒸馏中测量了传热和传质率。基于传热传质模型，研制了全回流条件下填料塔非均相精馏稳态模拟装置。模拟结果与实测结果吻合较好。这些研究结果发表在一份学术期刊上。在此基础上，开发了一种填料塔非均相精馏稳态模拟系统，其中填料塔为一进料流、顶流和底流，顶流为油相液回流。研究了操作条件对填料塔分离性能的影响。间歇式精馏实验采用结构填料塔，塔顶设有蒸馏接收器。研究了顶回流、全回流和底回流时液体浓度的动态特性。利用动态模拟装置将观测数据与预测值进行了比较。基于传热传质模型的间歇精馏动态模拟器的开发已经完成，并将继续进行。此外，还将开发一个填料塔非均相精馏的动态模拟系统。

The final purpose of the present work is to develop a dynamic simulator for distillation of vapor-liquid-liquid systems, that is, for heterogeneous distillation with packed columns. Since the simulator for packed columns requires heat and mass transfer models, heat and mass transfer rates were measured in heterogeneous distillation with packed columns having structured packing. A steady state simulator for heterogeneous distillation with packed columns under total reflux conditions was developed based on heat and mass transfer models. The predicted concentrations and flow rates in packed columns by the present simulator agreed with the observed ones. Those results have been published in an academic journal. Furthermore, a steady state simulator was developed for heterogeneous distillation by packed columns with one feed flow, top and bottom product flows and reflux of oil phase liquid at the top. The effect of operating conditions on the separation performance of packed columns was studied.On the other hand, the experiments of batch distillation were made by a packed column having structured packing with a distillate receiver at the top of the column. The dynamic behavior of liquid concentrations at top reflux, condensate at total condenser and bottom reflux was studied. The observed data were compared with the predicted values by a dynamic simulator for tray tower.Development of a dynamic simulator for batch distillation based on heat and mass transfer models has been made and will be continued. Furthermore, a dynamic simulator for heterogeneous distillation with packed columns will be developed.