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分批蒸馏
相关语句
  batch distillation
     Study on Optimal Strategies andMicrocomputer Control of Batch Distillation(Ⅱ)Batch Distillation Column and itsMicrocomputer Control
     分批蒸馏优化策略与微机控制的研究(Ⅱ)——分批蒸馏的设备与微机控制
短句来源
     A Study on The Charge of Batch Distillation
     关于分批蒸馏投料量的研究
短句来源
     Study on Optimal Strategies and Microcomputer Control of Batch Distillation ( I )Optimal Operating Strategies
     分批蒸馏优化策略与微机控制的研究(Ⅰ)——分批蒸馏的优化策略
短句来源
  相似匹配句对
     A Study on The Charge of Batch Distillation
     关于分批蒸馏投料量的研究
短句来源
     MEMBRANE DISTILLATION
     膜蒸馏
短句来源
     Osmotic distillation
     渗透蒸馏
短句来源
     SIMULATION FOR BATCH DISTILLATION
     分批精馏模拟技术
短句来源
     Study on Optimal Strategies and Microcomputer Control of Batch Distillation ( I )Optimal Operating Strategies
     分批蒸馏优化策略与微机控制的研究(Ⅰ)——分批蒸馏的优化策略
短句来源
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  batch distillation
Classification of the Phase Diagrams of Real Batch Distillation
      
A model is suggested and all possible phase diagrams are constructed for real batch distillation.
      
It is shown that physical modeling of continuous and batch distillation at infinite reflux ratio without taking into account the liquid holdup distribution may be inadequate to the real process.
      
It is shown that physical modeling of continuous and batch distillation at infinite reflux ratio without taking into account the liquid holdup distribution may be inadequate to the real process.
      
Finally, we present optimization results for an example from process engineering, a batch distillation.
      
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The requirement of much longer duration of startup is an important characteristic of a close-boiling fractionating column, and consequently the search for ways to shorten this period have been received much concern and attention. The conventional method of starting up a column is under the condition of constant vapor velocity, while in this paper, the authors propose another way of operation, i. e. startup with stepwise lowering of vapor velocity. The mathematical models of those two methods of startup are developed...

The requirement of much longer duration of startup is an important characteristic of a close-boiling fractionating column, and consequently the search for ways to shorten this period have been received much concern and attention. The conventional method of starting up a column is under the condition of constant vapor velocity, while in this paper, the authors propose another way of operation, i. e. startup with stepwise lowering of vapor velocity. The mathematical models of those two methods of startup are developed and solved to obtain the analytical solutions of exponential type to represent the change of concentration profile. The derived equations are in agreement with the experimental data. Both theoretical study and experimental work show that, when the same final concentration is reached, the duration of startup required for proposed operation is less than that for the conventional. This result may have some significance to the operation a close-boiling fractionating or batch distillating column.

精密精馏过程的一个特性就是开工时间相当长,因而如何缩短开工时间是一个人们关心的问题。通常采用恒气速的开工方式。本文提出另一种开工方式,即在逐阶段降低蒸汽速度的情况下开工。文中建立了这两种开工方式的数学模型,得出相应的指数型解,求出浓度变化曲线,并以实验数据对数学解进行了校核,彼此基本相符。理论分析与实验表明,在达到相同最终浓度的情况下,逐阶段降低气速的开工方式所需开工时间较常用的恒气速开工方式为短,这对精密精馏以及对分批蒸馏的操作都可能是有参考意义的。

Two novel strategies and their optimized operating modes of batch distillation, i. e. top accumulation under total reflux and varying pressure under combined reflux, are proposed. For the first strategy, the product component is concentrated and collected in a large reflux drum under the condition of total reflux. For the second strategy, the column pressure is varied during operation in order to keep the column temperature below the thermal decomposition point of the residue in reboiler, and a combined reflux...

Two novel strategies and their optimized operating modes of batch distillation, i. e. top accumulation under total reflux and varying pressure under combined reflux, are proposed. For the first strategy, the product component is concentrated and collected in a large reflux drum under the condition of total reflux. For the second strategy, the column pressure is varied during operation in order to keep the column temperature below the thermal decomposition point of the residue in reboiler, and a combined reflux is used. The corresponding mathematical models which take into account the holdups in both condenser and column are proposed and solved by using (?) convergency method. The application of these new strategies to the separation of a binary mixture ethanol-isopropanol and a multicomponent mixture n-heptane-n-octane-n-nonane-n-decane show that the present proposals can shorten the operating period by more than 30% and 50% respectively in comparison with the conventional constant reflux operation.

本文提出了塔顶累积全回流及变压强综合回流两个分批蒸馏的新操作策略及相应的优化操作法,通过数学模拟和θ收敛计算法求出了二元(乙醇—异丙醇)和多元(正庚烷—正辛烷—正壬烷—正癸烷)物系的数值解.计算结果表明,两种新操作法分别较传统的操作法缩短生产周期30%和50%以上.

This paper follows preceding paper (I). A new structure of batch distillation column with zero reboiler holdup is described, which is suitable for the case of drawing out heavy component from the bottom. A microcomputer control system with four closed loops for three batch distillation columns is reported. The experimental results of batch separation of a four components mixture with new operating model agreed well with theoretical prediction and showed reliable control by microcomputer.

本文为前文(Ⅰ)的继续.文中报道了塔釜无存料分批蒸馏塔新结构以及应用微型计算机对三个实验进行四个闭环回路系统的控制,并在此控制系统上取得大量试验数据,证实了理论计算的正确性与微机控制系统的可靠性.

 
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