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首页> 外文期刊>Separation and Purification Technology >A hybrid batch distillation/membrane process for high purification part 1: Energy efficiency and separation performance study for light impurities removal
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A hybrid batch distillation/membrane process for high purification part 1: Energy efficiency and separation performance study for light impurities removal

机译：高净化部分1的杂交批蒸馏/膜工艺：清除光杂质的能量效率和分离性能研究

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摘要

High purification processes are usually characterized by high energy demand and unavoidable losses of a purified substance during removal of trace impurities. An unsteady-state hybrid separation method based on a batch distillation with integrated membrane gas separation was studied for high purification of liquefied gases. The performance of a hybrid process versus a standalone batch distillation was analyzed through simulations and experiments for the case of light impurities removal from ammonia. A model of a middle-vessel batch distillation column was built in Aspen Plus Dynamics (TM) with an integrated hollow fiber membrane model implemented in Aspen Custom Modeler (TM). The results of batch distillation simulations are validated against the experimental data. Among the considered aspects are the hydrodynamics study, the effect of operating conditions on column separation performance, and the dynamics of the purification process. The simulations were done at a varied impurity cut withdrawal rate, membrane area, stage cut, and membrane selectivity taking into account the effective (mixed gases) selectivity data for ammonia/impurity systems available in the open literature. The possibility of both reducing the total energy input and improving the product recovery is shown for a hybrid purification process involving the separation of the withdrawn impurity cut in a membrane module with recycling of the purified component back to the distillation column.
机译：高净化过程的特征通常是在去除痕量杂质期间纯化物质的高能量需求和不可避免的损失。研究了基于批量蒸馏的不稳定状态混合分离方法，用于高净化液化气质。通过仿真分析杂化过程与独立批量蒸馏的性能和从氨中去除光杂质的实验。中间容器批量蒸馏塔的模型内置于Aspen Plus Dynamics（TM）中，具有在Aspen定制建模器（TM）中的集成中空纤维膜模型。批量蒸馏模拟结果针对实验数据验证。在考虑的方面是流体动力学研究，操作条件对柱分离性能的影响，以及净化过程的动力学。考虑到开放文献中可用的氨/杂质系统的有效（混合气体）选择性数据，以不同的杂质切除取出率，膜面积，阶段切割和膜选择性进行模拟。涉及将杂种杂质切割在膜组件中切割的杂交纯化方法，将纯化的组分的再循环回到蒸馏塔中的杂交纯化方法，涉及涉及将取出的杂质切割的杂交纯化方法分离。

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