立体传质塔板板上液相速度场的实验研究  

Liquid velocity field on plate of combined trapezoid spray tray

作　　者：王志英[1] 李春利[1] 刘继东[1] 孙玉春[2] 

机构地区：[1]河北工业大学化工学院,天津300130 [2]天津渤海职业技术学院环境工程系,天津300402

出　　处：《化学工程》2009年第3期16-19,共4页Chemical Engineering(China)

基　　金：国家科技部科技攻关计划资助项目(2001BA901A13);河北省自然科学基金资助项目(B2007000021)

摘　　要：在1 000 mm的冷模实验塔内采用热膜测速仪对立体传质塔板(CTST)的板上液相速度分布进行了实验研究。得到了CTST板上液相在平面上的速度分布特征;在液层高度方向,液相速度分布在塔板进口、出口和帽罩的底隙附近,分别具有不同的特点。考察了堰高、液体流量、板孔气速对板上液相流场的影响。测量结果表明,罩内气体的提升作用对板上液相流场影响较大,底隙附近的液体速度与进入塔板的液体速度之比随堰高和板孔气速的增大而增大,随着液体流量的增大,该比值减小到一定程度后略有回升。The liquid velocity distribution on the plate of combined trapezoid spray tray （CTST） was measured in an experimental column with diameter of 1000 mm by using hot-film anemometry. The fiat liquid velocity distribution of CTST on the plate was obtained. Various liquid flow characteristics along liquid height direction appeared in three regions, namely, entrance, exit and near caps zones. The main factors affecting the liquid velocity field, such as outlet weir height, liquid flow and gas kinetic factor in plate hole were investigated respectively. The experimental results show that the effect of the gas kinetic factor in plate hole on the liquid velocity is less than the other factors. The results also show that the gas elevating has an obvious influence on the liquid velocity field. The ratio of the liquid velocity near caps to that of entering into plate increases with the increasing of outlet weir height and gas flow rate, and decreases at first and then increases gradually with the increasing of liquid flow rate.

关 键 词：塔板 立体传质塔板 速度分布 测量 

分 类 号：TQ053.5[化学工程]