卧式气液搅拌槽中比界面积的测定

本文应用绕射理论,对光透射法测量气液分散体系比界面积进行了分析和讨论,用激光代替一般光源,从而提高了测量装置的稳定性和测量精度.同时,还对卧式气液搅拌槽中的比界面积进行了研究,得到了可用于实际聚合釜设计的关联式,指出增大桨径比是增强气液接触效果的有效途径,加入少量乳化剂可使体系的比界面积较纯水体系提高10—25倍.

Measurement of Specific Interfacial Areas in Horizontal Type Gas-Liquid Agitated Vessels

Based on diffraction theory, the determination of the gas-liquid specific interfacial areas in horizontal agitated vessels by laser transmission method is discussed and analysed. Better reliability and good accuracy are claimed with laser measurements than with normal light. Studies on specific inter-facial areas in horizontal vessels provide valuable suggestions for the design of polymerization vessels. Increasing the ratio of impeller diameter may prove to be a reasonable approach for enhancing gas-liquid contact. Furthermore, addition of small amounts of surface-active agents may bring about 10 to 25 times in specific interfacial areas.