多相流泵溶气气浮中气泡粒径分布的实验研究  

EXPERIMENTAL STUDY OF BUBBLE SIZE DISTRIBUTION OF MULTIPHASE-PUMP DISSOLVED AIR FLOTATION

作　　者：范欣[1] 何利民[1] 王鑫[1] 崔月红[1] 张东锋[1] 

机构地区：[1]中国石油大学(华东)储运与建筑工程学院,山东青岛266555

出　　处：《工程热物理学报》2010年第7期1159-1162,共4页Journal of Engineering Thermophysics

基　　金：国家自然基金青年基金项目(No.50676109)

摘　　要：本文通过多相流泵溶气气浮装置制备气泡,对气浮过程中气泡的粒径分布进行了研究。首先,采用显微摄像法和激光衍射法对气泡粒径进行了测量;其次,通过激光衍射法,对气浮过程中影响气泡粒径分布的因素如压力、气液比、矿化度、表面张力等参数进行了研究。结果显示:两种测量方法具有较好的一致性;气泡粒径随压力升高而逐渐减小,当压力高于0.5 MPa时,继续提高压力已无明显作用;气液比升高导致气泡粒径减小,直至溶气水达到饱和;矿化度的升高使气泡从更多的气泡核位析出,从而降低了气泡粒径;表面张力的降低可以有效地抑制气泡间的相互聚并,从而使气泡粒径减小。Present study focused on the size distribution of the bubbles generated by EDUR multiphase pump, and the factors that influenced the bubble size such as saturation pressure, gas-liquid ratio, salinity and surface tension. Measurements of bubble size were conducted with the help of high speed video cameral and Malvern Mastersizer. The results show that both methods consist well with each other. The increase of saturation pressure leads to the decrease of bubble size. However, pressures higher than 0.50 MPa have no effect. Bubble size decreases with the increase of gas-liquid ratio until the liquid is completely saturated. Salinity has a positive effect on the reduction of bubble size. Surfactant can significantly inhibit the coalescence of bubbles by reducing surface tension.

关 键 词：溶气气浮 多相流泵 气泡粒径分布 

分 类 号：O359[理学—流体力学]