高速剪切流剪切形成微气泡的研究  

RESEARCH ON MICROBUBBLES FORMATION BY HIGH-SPEED CROSS-FLOW

作　　者：吴胜军[1] 方为茂[1] 赵红卫[1] 昌宇奇[1] 冯波[1] 熊莹[1] 林学理[1] 

机构地区：[1]四川大学化工学院,四川成都610065

出　　处：《水处理技术》2009年第5期44-48,共5页Technology of Water Treatment

摘　　要：气浮工艺中气泡的大小是衡量气泡制造技术的关键。研究了利用陶瓷微孔膜管在高速剪切流剪切作用下形成微气泡的条件,流体物性对气泡粒径分布的影响。试验采用静态显微摄像技术和图像分析系统对气泡粒径分布进行了表征。结果表明,高速剪切流剪切形成的微气泡直径在15～50μm之间,膜管孔径大小及表面性能,剪切流流速,液体表面张力,粘度是影响气泡粒径分布的主要因素。The bubbles size is a key of evaluation the bubbles generation in air floatation technology.This condition of using ceramic mieroporous tube to produce microbubbles by high-speed cross-flow and the effect of Liquid properties on the initial bubble size distribution were studied. The bubble size distribution in this unit was measured by static micro-video and image analytics system.These results suggested that the mierobubbles whose diameter is dominated from 15μm to 50μm, the initial bubble size distribution depend strongly on pore size and facial characteristics of the membrane tube, cross-flow rate,liquid surface tension and viscosity.

关 键 词：气浮 陶瓷微孔膜管 微气泡 气泡粒径分布 

分 类 号：X703.3[环境科学与工程—环境工程]