Effects of Orifice Orientation and Gas-Liquid Flow Pattern on Initial Bubble Size  

作　　者：刘长军 梁斌 唐盛伟 闵恩泽 

机构地区：[1]Multi-phases Mass Transfer and Reaction Engineering Laboratory, College of Chemical Engineering, Sichuan Uni-versity, Chengdu 610065, China [2]SINOPEC Research Institute of Petroleum Processing, Beijing 100083, China

出　　处：《Chinese Journal of Chemical Engineering》2013年第11期1206-1215,共10页中国化学工程学报（英文版）

基　　金：Supported by the National Natural Science Foundation of China （20736009）.

摘　　要：In many gasliquid processes, the initial bubble size is determined by a series of operation parameters along with the sparger design and gasliquid flow pattern. Bubble formation models for variant gasliquid flow pat terns have been developed based on force balance. The effects of the orientation of gasliquid flow, gas velocity, liquid velocity and orifice diameter on the initial bubble size have been clarified. In ambient airwater system, thesultable gasllquid flow pattern is important to obtain smaller bubbles under the low velocity liquid crossflow con ditions with stainless steel spargers. Among the four types of gasliquid flow patterns discussed, the horizontal orifice in a vertically upward liquid flow produces the smallest initial bubbles. However the orientation effects of gas and liquid flow are found tobe insgnifican whenliq.uid velocity is.higher than. 3.2 m;sa or theorifice diameter is small enough.In many gas-liquid processes, the initial bubble size is determined by a series of operation parameters along with the sparger design and gas-liquid flow pattern. Bubble formation models for variant gas-liquid flow patterns have been developed based on force balance. The effects of the orientation of gas-liquid flow, gas velocity, liquid velocity and orifice diameter on the initial bubble size have been clarified. In ambient air-water system, the suitable gas-liquid flow pattern is important to obtain smaller bubbles under the low velocity liquid cross-flow conditions with stainless steel spargers. Among the four types of gas-liquid flow patterns discussed, the horizontal orifice in a vertically upward liquid flow produces the smallest initial bubbles. However the orientation effects of gas and liquid flow are found to be insignificant when liquid velocity is higher than 3.2 m·s 1or the orifice diameter is small enough.

关 键 词：bubble column BUBBLE design mathematical modeling multiphase flow sparger 

分 类 号：TQ171.651[化学工程—玻璃工业] TU-024[化学工程—硅酸盐工业]