A new computational mass transfer model is proposed for simulating the distillation process by solving the fluctuating mass flux u^＇ic^＇ for the closure of turbulent mass transfer equation in order to obtain the con...A new computational mass transfer model is proposed for simulating the distillation process by solving the fluctuating mass flux u^＇ic^＇ for the closure of turbulent mass transfer equation in order to obtain the concentration profile and the separation efficiency of distillation column. The feather of the proposed model is to abandon the conventional way of introducing the turbulent mass transfer diffusivity （dispersion coefficient） to the turbulent mass transfer equation. To verify the validity of the proposed model, a commercial scale packed column and a sieve tray column were simulated and compared with published experimental data. The simulated results were satisfactorily confirmed in both concentration distribution and senaration efficiency.展开更多
A new empirical correlation has been presented for the effect of entrainment on distillation tray efficiency based on the results of numerical solution given by Lockett, et al. The calculated results are in good agree...A new empirical correlation has been presented for the effect of entrainment on distillation tray efficiency based on the results of numerical solution given by Lockett, et al. The calculated results are in good agreement with those of the numerical solution given by Lockett, et al. The average deviation is 1.14% and the maximum deviation is 4.76% for the ranges of 0 〈 Pe ≤ 1000, 0.40 ≤ EOG ≤ 1.00, 0.5≤λ0 ≤ 3.0 and e0 ≤ 0.3. In comparison with the correlation proposed by Bennett et al., the average and maximum deviations of EM^av are 2.17% and 20.49%, respectively.展开更多
全面的评价和介绍了泡罩塔的操作性能以及设计要点,建立了一整套可以用于计算机计算采用的设计公式。对于泡罩塔板液面梯度的计算采用Davies的公式,并提供了计算机编程的软件。对于雾沫夹带的计算介绍和采用Simkin et al的公式。并以此...全面的评价和介绍了泡罩塔的操作性能以及设计要点,建立了一整套可以用于计算机计算采用的设计公式。对于泡罩塔板液面梯度的计算采用Davies的公式,并提供了计算机编程的软件。对于雾沫夹带的计算介绍和采用Simkin et al的公式。并以此文所介绍的公式用VB6.0的语言建立了计算泡罩塔板设计的计算软件"BubbleTray"。用该软件对例题进行了计算演示,其结果是令人满意的,可以推荐给读者采用。展开更多
基金Supported by the National Natural Science Foundation of China （20736005）.
文摘A new computational mass transfer model is proposed for simulating the distillation process by solving the fluctuating mass flux u^＇ic^＇ for the closure of turbulent mass transfer equation in order to obtain the concentration profile and the separation efficiency of distillation column. The feather of the proposed model is to abandon the conventional way of introducing the turbulent mass transfer diffusivity （dispersion coefficient） to the turbulent mass transfer equation. To verify the validity of the proposed model, a commercial scale packed column and a sieve tray column were simulated and compared with published experimental data. The simulated results were satisfactorily confirmed in both concentration distribution and senaration efficiency.
基金Project supported by the National Natural Science Foundation of China(Grant No.10271074)
文摘A new empirical correlation has been presented for the effect of entrainment on distillation tray efficiency based on the results of numerical solution given by Lockett, et al. The calculated results are in good agreement with those of the numerical solution given by Lockett, et al. The average deviation is 1.14% and the maximum deviation is 4.76% for the ranges of 0 〈 Pe ≤ 1000, 0.40 ≤ EOG ≤ 1.00, 0.5≤λ0 ≤ 3.0 and e0 ≤ 0.3. In comparison with the correlation proposed by Bennett et al., the average and maximum deviations of EM^av are 2.17% and 20.49%, respectively.
文摘全面的评价和介绍了泡罩塔的操作性能以及设计要点,建立了一整套可以用于计算机计算采用的设计公式。对于泡罩塔板液面梯度的计算采用Davies的公式,并提供了计算机编程的软件。对于雾沫夹带的计算介绍和采用Simkin et al的公式。并以此文所介绍的公式用VB6.0的语言建立了计算泡罩塔板设计的计算软件"BubbleTray"。用该软件对例题进行了计算演示,其结果是令人满意的,可以推荐给读者采用。
