Mass Transfer and Flow in Rotary Gas-Liquid Contactors (Industry-University Cooperative Project)

研究总结：可以实现更高的传质速率， 填充床旋转装置，其中液体获得加速度 由于重力的作用，它会增加很多倍。 有潜在的商业 在许多领域的应用。 建议的目标 研究的目的是为放大提供合理的基础， 旋转式气液分离装置的操作与设计 接触。 为了实现这一目标，形状，结构， 转子内液膜的速度分布和稳定性 首先检查容易表征的固体表面。 渗透模型或对流扩散模型则为 适合于开发合适的传质表达式 系数，包括随机的统计模型 固体表面的分布。 这提供了一个合理的基础 for scaleup放大. 旋转填料的持液率与结构 用改良的电导率法测量了床层 从而提供关于特征的附加信息 在这些装置中的液膜流动。 科学新奇。 本研究有两个新的特点：（1） 有系统地利用在以下方面产生的健全的基本知识： 已知几何形状的设备，以生成设计程序， 难以用其他方法表征的设备，（2） 改进的电导率法 测量旋转设备中的液体和纹理。 这种测量通常是困难的。 实际和技术影响。 这项工作将提供一个公司 设计的基础，从而增加潜在的商业 这个装置的应用。 预期设备 将在高纯度特种化学品中得到应用， 通常不能在传统设备中容易地生产。 另一个潜在的应用是在单体汽提中， 聚合。 此外，展望未来， 需要开发用于气液接触的设备， 在失重或零重力环境下的外层空间。 的 拟议的研究将有助于实现许多 上述可能性。

Research Summary: Higher mass transfer rates can be achieved in packed bed rotary devices where the liquid attains an acceleration many times that due to gravity. There are potential commercial applications in many fields. The objective of the proposed research is to provide a rational basis for the scaleup, operation and design of rotary devices for gas-liquid contacting. To accomplish this goal, the shape, structure, velocity profile and stability of liquid films in rotors of readily characterizable solid surfaces is first examined. The penetration model or the convection-diffusion model is then adapted to develop suitable expressions for the mass transfer coefficients, including a statistical model for random distribution of solid surfaces. This provides a rational basis for scaleup. Liquid holdup and texture in the rotating packed beds is measured by a modified electrical conductivity method thereby providing additional information on the characteristics of liquid film flow in these devices. Scientific Novelty. The research has two novel features, (1) systematic use of sound fundamental knowledge generated in equipment of known geometry to generate design procedures for equipment which are otherwise difficult to characterize, (2) development of a modified electric conductivity method for measurement of liquid-up and texture in rotating equipment. Such measurements are normally difficult. Practical and Technical Impact. The work will provide a firm basis for design and thereby increase potential commercial applications of this device. It is expected that the device would find application in high purity specialty chemicals which cannot be often readily produced in traditional equipment. Another potential application is in monomer stripping in polymerizations. Moreover, as one looks into the future, there is a need to develop equipment for gas-liquid contacting in outer space under reduced or zero gravity environment. The proposed research will facilitate the realization of many of the above possibilities.