摘要
介绍了用于细颗粒分离的水力旋流器的基本结构形式及主要结构参数。并针对旋流器雷诺数、分流比、旋数等无因次参数对压力特性的影响进行了细致的试验研究,找出了这些参数与欧拉数和压降比的相互关系。所有试验均在不含气的条件下进行。结果表明,随着雷诺数、分流比和旋数的分别加大,水力旋流器的压力降呈增加趋势,压降比则呈下降趋势。另外,针对当量直径45μm尿素复合颗粒进行了分离特性研究。结果表明,随着雷诺数的加大,分离效率逐步提高,但并非雷诺数越大越好;对于分流比,则只在低雷诺数时有利于分离效果的改善;旋数分别为9、16和29的实验结果表明,旋数16的总体效果为最优。
The structural sketch and the main geometric parameters of hydrocyclone used for separating fine particles were introduced, and the effects of several dimensionless units, such as Reynolds number, split ratio, and swirl number, on hydrocyclone′s pressure characteristics were researched. All the experiments were carried out without free gas injected. It shows that with the rise of Reynolds number, split ratio, and swirl number (respectively), pressure drop of hydrocyclone increases, while pressure drop ratio decreases. And besides, focusing on 45 μm mean size urea compound particles, the separation experiments were carried out. Effects of Reynolds number, split ratio, and swirl number on hydrocyclone′s separation performance were analyzed. The experimental results show that with the rise of Reynolds number, the separation efficiency increases gradually, but it can′t be concluded that the higher the Reynolds number the better. As to split ratio, only under the condition of lower Reynolds number can it improve separation result. Among the results of three swirl numbers: 9, 16, and 29, the result of swirl number 16 is the best.
出处
《化学工程》
CAS
CSCD
北大核心
2004年第2期42-46,共5页
Chemical Engineering(China)
基金
中国国家留学基金管理委员会资助(CSC21823043)
