折流式旋转床持液量的研究  

Study on Liquid Hold-up of Rotating Zigzag Bed

作　　者：卢永生[1] 李育敏[1] 俞云良[1] 刘学军[1] 计建炳[1] 

机构地区：[1]浙江工业大学化学工程与材料学院浙江省生物燃料利用技术研究重点实验室,浙江杭州310014

出　　处：《过程工程学报》2014年第4期568-572,共5页The Chinese Journal of Process Engineering

摘　　要：将折流式旋转床分成若干液体流动区,计算流动区内动、静圈壁上液膜及动、静圈之间液滴的运动时间,在此基础上建立折流式旋转床持液量模型.以空气-水为物系,在直径300 mm、高51 mm的折流式旋转床中进行实验,分别测得不通和通空气时转子的持液量,用实验数据拟合出持液量模型参数.结果表明,转子持液量随液量和气量增加而增加,随转子转速增加而减小,高转速下气量对持液量的影响明显减弱.折流式旋转床不通气持液量为2.35%~3.68%,是普通丝网旋转填料床不通气持液量的1.32~2.06倍.A mathematical model on the liquid hold-up of a rotating zigzag bed （RZB） was proposed on the basis of division of the bed into several liquid-flow regions, from which the flowing time of liquid film on the walls of stationary and rotating baffles and flowing time of liquid droplets in the gap between the stationary and rotating baffles were calculated. Using air-water system the experiment was carried out in the bed with a rotor of 300 nun diameter and 51 mm height to measure the liquid hold-up with and without gas flow. The model parameters were obtained by regression based on the experimental data. The results showed that the liquid hold-up increased with increasing of liquid flow rate and gas flow rate, but decreased with increasing of rotor speed, and the influence of the gas flow rate decreased significantly at high rotor speeds. The liquid hold-up of RZB without gas flow was 2.35%-3.68%, which was 1.32-2.06 times of the common wire mesh rotating packing bed.

关 键 词：折流式旋转床 持液量 停留时间 数学模型 

分 类 号：TQ053.5[化学工程] TQ021.1