弓形降液管内的气含率分布  

Gas Hold-up Distribution in Segment Downcomer

作　　者：俞晓梅[1] 吴仁安[1] 徐崇嗣[1] 

机构地区：[1]浙江工业大学,温州大学

出　　处：《高校化学工程学报》1995年第4期332-337,共6页Journal of Chemical Engineering of Chinese Universities

摘　　要：采用毛细管光电检测技术，测定了弓形降液管内气含率的三维分布。实验结果表明，在降液管中心处的气含率高于两侧，在外侧的气含率高于内侧。沿高度方向气含率的分布分为三个区：第一区为高气含率区，第二区为气含率显著变化区，第三区为下层低气含率区。在每一区内，气含率都随液体流率的增加而增加。研究结果为设计更合理的降液管提供了实验依据。实验还表明Ｈｏｆｈｕｉｓ关于乳化态的判据是有局限性的。The three dimensional distribution of gas holdup in segment downcomer has been measured by using the capillary probe and the photoelectrical detect technique.The experimental results show that the gas hold-up at the center of the downcomer is higher than that on both sides.The gas holdup on the outside is higher than that on the inside. The distribution of gas hold-up along the height is divided into three regions: the first is of high gas hold-up,the second is of marked variation,and the third is of low gas hold-up. In every region,the gas hold-up increases with the liquid rate.These results provide experimental reference for designing more reasonable downcomers.The experiments also show that there is a limit to Hofhuis' criterion of emulsion state.

关 键 词：弓形降液管 气含率 分布 降液管 塔板 

分 类 号：TQ027.32[化学工程] TQ053.2