用新型光透式颗粒检测法测定颗粒凝聚程度  

Determination of Particle Aggregation Degree With New Light Extinction Particle Monitoring Technique

作　　者：李星[1] 杨艳玲[1] 

机构地区：[1]北京工业大学建筑工程学院,北京100022

出　　处：《北京工业大学学报》2003年第3期301-304,共4页Journal of Beijing University of Technology

基　　金：国家自然科学基金(50078017)

摘　　要：介绍了一种全新的光透消光法颗粒检测技术,其原理是基于将光束透射过流动的含有悬浮颗粒的液体,根据透过光强度的脉动程度,来反映悬浮液中颗粒物质的聚集状态。理论计算和实际应用均表明该方法可以在线地反映出水中颗粒物质的凝聚状态和粒径相对变化;可详细地显示出絮凝体形成的过程和混合条件的影响情况;以及在剪切力作用下颗粒样品在水中破碎或分解的过程,因而可作为一种深入研究颗粒物质凝聚或分散过程的有效手段和方法。A new particle monitoring technique of light extinction mode is introduced, of which the principle is based on the fact that when a light beam transmits the flowing suspensions containing suspending particles, different fluctuation degree of transmitted light intensity can indicate the aggregation state of particles. Both the theoretical calculation and practical applications show that this on-line particle monitoring method can reflect the aggregation state and the relative size change of particles. The floc formation process and the mixing conditions can be shown in detail in monitoring the coagulation process of water treatment. At the same time, the detailed process of disintegration or dispersion of granular sample under the action of shearing condition can also be seen. Therefore, the technique can be used as an effective means and method to study the aggregation and disintegration process of particulate matters.

关 键 词：悬浮液 颗粒 光透消光法 在线检测 凝聚 分散 

分 类 号：TU991.22[建筑科学—市政工程] TU911.63