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| Shortcut Algorithm for Simulation of Batch Extractive Distillation | |
| 作者姓名： | 邬慧雄 徐世民 胡晖 肖斌 |
| 作者单位： | Chemical Engineering Department Tsinghua University，Engineering Research Center for Distillation Technology，Tianjin University，Engineering Research Center for Distillation Technology，Tianjin University，Shanghai Research Institute of Chemical Industry，Beijing 100084，China，Engineering Research Center for Distillation Technology，Tianjin University，Tianjin 300072，China，Tianjin 300072，China，Tianjin 300072，China，College of Chemistry and Chemical Engineering，Fuzhou University，Fuzhou 350002，China，Shanghai 200062，China |
| 基金项目： | Supported by National Development and Reform Commission (2005 No1899) |
| 摘 要： | The batch extractive distillation (BED) process has the advantages of both batch and extractive distillation. It is one of the most promising means for the separation of azeotropic and close-boiling point systems. However, so far this process has not been applied in industry due to its over-complexity. A new shortcut model was proposed to simulate the operation of the batch extractive distillation operations. This algorithm is based on the assumption that the batch extractive distillation column can be considered as a continuous extractive distillation column with changing feed at any time. Namely, the whole batch process is simulated as a succession of a finite number of steady states of short duration, in which holdup is considered as constant mole. For each period of time the batch extractive distillation process is solved through the algorithm for continuous extractive distillation. Finally, the practical implementation of the shortcut model is discussed and data from the laboratory and literature are presented. It is found that this model has better adaptability, more satisfactory accuracy and less calculative load than previous rigorous model. Hence the algorithm for simulating BED is verified. |
| 关 键 词： | 一次性萃取 蒸馏 模拟技术 短期模型 |
Shortcut Algorithm for Simulation of Batch Extractive Distillation |
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| WU Huixiong,XU Shimin,HU Hui,XIAO Bin.Shortcut Algorithm for Simulation of Batch Extractive Distillation[J].Transactions of Tianjin University,2007,13(6):428-432. | |
| Authors: | WU Huixiong XU Shimin HU Hui XIAO Bin |
| Institution: | 1. Chemical Engineering Department, Tsinghua University, Beijing 100084, China;Engineering Research Center for Distillation Technology, Tianjin University, Tianjin 300072, China 2. Engineering Research Center for Distillation Technology, Tianjin University, Tianjin 300072, China 3. Engineering Research Center for Distillation Technology, Tianjin University, Tianjin 300072, China;College of Chemistry and Chemical Engineering, Fuzhou University, Fuzhou 350002,China 4. Shanghai Research Institute of Chemical Industry, Shanghai 200062, China |
| Abstract: | The batch extractive distillation (BED) process has the advantages of both batch and extractive distillation. It is one of the most promising means for the separation of azeotropic and close-boiling point systems. However, so far this process has not been applied in industry due to its over-complexity. A new shortcut model was proposed to simulate the operation of the batch extractive distillation operations. This algorithm is based on the assumption that the batch extractive distillation column can be considered as a continuous extractive distillation column with changing feed at any time. Namely, the whole batch process is simulated as a succession of a finite number of steady states of short duration, in which holdup is considered as constant mole. For each period of time the batch extractive distillation process is solved through the algorithm for continuous extractive distillation. Finally, the practical implementation of the shortcut model is discussed and data from the laboratory and literature are presented. It is found that this model has better adaptability, more satisfactory accuracy and less calculative load than previous rigorous model. Hence the algorithm for simulating BED is verified. |
| Keywords: | batch extractive distillation simulation shortcut model |
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