摘要
筛板塔塔内件的作用主要是增大气液比表面积,改变气液接触形式,以提高塔内传质、传热。研究者提出了新型微气泡塔盘,通过在筛板上方的泡沫层内增加破泡组件,利用破泡组件使大气泡破裂为小气泡,增加气液接触面积,提高气液传质、传热效果。利用自行设计的筛板塔和微气泡塔盘实验平台及PIV测速系统,测定了塔板上气泡的直径分布和上升速度。实验结果显示:与普通筛板相比较,微气泡塔盘上气泡的上升速度较小,气泡停留时间更长,且径向分布更平坦;气泡直径也仅为筛板的1/16,气液接触的比表面积增大,更利于传质过程的进行。
The function of inner parts of sieve tray tower is to increase the specific surface area of gas-liquid and change the contact form of gas-liquid in order to improve mass transfer and heat transfer in the tower. The researchers put forward a new type of micro bubble tray. By adding bubble breaking assembly in the foam layer above the sieve plate, big bubbles can be broken into small bubbles to increase the gas-liquid contact area, and improve the gas-liquid mass transfer and heat transfer effect. The diameter distribution and rising velocity of bubbles on the sieve tray and micro-bubble tray were measured using a self-designed experimental platform and PIV speed measurement system. The experimental results showed that compared with the ordinary sieve plate, the rising speed of bubbles on the microbubble tray was smaller, the residence time of bubbles was longer, and the radial distribution was more flat;the diameter of bubbles was only 1/16 of the sieve plate, and the specific surface area of gas-liquid contact increased, which was more conducive to the mass transfer process.
作者
郭舒
董纪鹏
鲍捷
李建隆
GUO Shu;DONG Ji-peng;BAO Jie;LI Jian-long(College of Chemical Engineering,Qingdao University of Science&Technology,Shandong Qingdao 266042,China)
出处
《当代化工》
CAS
2019年第11期2513-2516,共4页
Contemporary Chemical Industry
关键词
强化传质
微气泡塔盘
破泡装置
气泡直径
Enhanced mass transfer
Micro-bubble tray
Bubble breaking device
Bubble diameter
