超重力旋转床中水脱氧过程的模型化研究

超重力旋转床是一种高效的强化传质和混合的新型设备。今提出了超重力旋转床中的水脱氧过程的传质模型，分别采用欧拉方法和拉格朗日方法对超重力旋转床中的气相和液滴的运动行为进行了数值模拟；在此基础上计算了液滴的传质系数，计算结果和实验结果符合较好，平均误差为7．9％。当超重力旋转床中液体存在的主体形式更接近于液滴时，模型计算结果误差减小。进一步讨论分析了液体和气体流量、转速以及填料内径的变化对于超重力旋转床体积传质系数的影响，分析表明旋转填料对液体剧烈地剪切破碎分散作用是强化传质过程的主要原因。

Modeling of Water Deoxygenation in a Rotating Packed Bed

As a novel multiphase contactor, the rotating packed bed (RPB) can greatly intensify the process of multiphase mass transfer. A mass transfer model was established to numerically simulate the process of water deoxygenation in the RPB. In this model an Eulerian-Lagrangian method was applied to calculate the flow of the gas and the movement of liquid droplets, upon which the mass transfer coefficient of liquid droplets was obtained. The simulated results are in fair agreement with the experimental data and the average deviation is 7.9%. When the pattern of the liquid flow in the packing bed is mostly in droplets, the deviation of calculated results from the experimental data will be decreased. Meanwhile, the influence of different operation conditions, such as the rotation speed, the flow rates of liquid and gas, as well as the inner diameter of the packing on the volumetric mass transfer coefficient was studied. According to the model, the mass transfer intensification is primarily contributed by the liquid atomization caused by the dispersion effect of the rotating packing.