管式微孔介质气泡发生器中气泡粒径分布的实验研究  

Experimental Research on Bubble Size Distribution by Tubulaar Bubble Generator with Microporous Medium

作　　者：陈家庆[1] 蔡小垒[1] 王春升 陈涛涛[1] 符博[1] 张明 尚超 姬宜朋[1] 

机构地区：[1]北京石油化工学院机械工程学院,北京102617 [2]中海油研究总院技术研发中心,北京100027

出　　处：《应用基础与工程科学学报》2016年第3期490-498,共9页Journal of Basic Science and Engineering

基　　金：国家自然科学基金项目(51079006);北京市属高等学校"长城学者"培养计划资助项目(CIT&TCD20150317)

摘　　要：为给高效气浮净化处理或气液传质过程的工程化设计研发提供硬件设备和基础性数据支撑,设计研发了基于微孔介质发泡机理处理量为2m3/h的微细气泡发生器,并首次在国内采用美国Microtrac公司S3500型激光粒度仪成功实现了微细气泡粒径的在线带压测量,系统讨论了液流流量、注气压差和注气比3个操作参数对管式微孔介质气泡发生器中气泡粒径分布特性的影响.实验结果表明:随着液流流量的增加,微细气泡平均粒径逐渐降低,二者之间呈现一种近似直线关系;随着注气压差的增加,微细气泡平均粒径先急剧减小后基本保持不变;随着注气比的增加,微细气泡相互聚并现象加剧导致粒径呈现指数形式增长.To provide the hardware equipment and basic data support for efficient air-flotation purification treatment or engineering design for the process of mass transfer in gas-liquid,a micro-bubble generator with the capacity of 2m3/ h have been designed based on the microporous media shearing mechanism. A vertical counter-current gas flotation test apparatus was also constructed. Online measurement of micro-bubble size distribution under pressure has been successfully achieved by Microtrac S3500 laser particle analyzer for the first time in China. Furthermore,the influence of operating parameters on micro-bubble size distribution in micro-bubble generator have been systematically investigated and discussed. It is demonstrated by the experimental results that,with the increase of water flow,average particle size of microbubbles are gradually reduced. There is an approximate linear relationship between the two variables. The average particle size of micro-bubbles is sharply decreased to a certain value and then remains constant while the injection pressure difference is increasing. With the increase of gas injection ratio,the phenomenon of micro-bubble coalescence aggravates which leads to exponential growth of particle size of micro-bubbles.

关 键 词：微孔发泡 操作参数 气泡粒径 微细气泡发生器 

分 类 号：X703.3[环境科学与工程—环境工程] TU991.2[建筑科学—市政工程]