动态旋叶压滤机滤室内流体径向速度的研究  

Study on the Radial Velocity in the Chamber of Dynamic Rotary Filter Press

作　　者：谭蔚[1] 石建明[1] 朱企新[1] 赵扬[2] 

机构地区：[1]天津大学化工学院,天津300072 [2]浙江大学材料与化工学院,浙江杭州310027

出　　处：《高校化学工程学报》2006年第2期208-212,共5页Journal of Chemical Engineering of Chinese Universities

基　　金：国家自然科学基金(29276256)。

摘　　要：对采用动态过滤原理的旋叶压滤机滤室内的流体流动,在有流通量和双面渗滤的实际工作条件下进行了理论分析。采用有限元方法计算了平板形转盘结构的滤室内流体的径向速度,并用激光测速方法进行了实验验证与研究,得到了径向速度与过滤半径、流通量之间的关系。结果表明有限元计算值与实验值基本相符,计算方法是可靠的。在有渗滤条件下,流体径向速度随渗滤比的增大而减小;随流通量的增大而增大。同时对平板形、沟槽形、叶片形三种不同转盘结构的滤室内流体的径向速度进行了激光测定,结果表明三种转盘形式下径向速度的分布及操作参数对径向速度的影响趋势是相似的;条件相同时,叶片形转盘和沟槽形转盘滤室内流体的径向速度远大于平板形转盘滤室内流体的径向速度,三种转盘结构中叶片形转盘对滤室内流体的径向速度影响最大。因此,实际应用时应该选用叶片形转盘或沟槽形转盘。The flow mechanism in the chamber of a dynamic rotary filter press with flow rate and two-side permeations as in the actual operating condition was theoretically studied. The radial velocities at different radial positions under a constant flow rate, and at a definite radial position under different flow capacities were calculated and verified by the experimental data measured. The calculated results by using finite element method are in good conformity with the corresponding data measured by using laser Doppler anemometry（LDA）. It means that the calculation method used is reliable. The results also show that the radial velocity is reduced with increasing the filtrate ratio PE and is increased with increasing the flow capacity. The radial velocity in three kinds of chamber, each with different types of disk plate disk, grooved disk and bladed disk, were measured by using LDA, respectively. Under the same condition, the radial velocity distributions in those chambers with different types of disk mentioned above are similar and the radial velocity in the chamber with grooved disk or beaded disk is much higher than that in the chamber with plate disk, and among them, the radial velocity in the chamber with bladed disk is highest. So it is suggested that the filter press with bladed disks or grooved disks is the most preferable one for actual application.

关 键 词：渗滤 径向速度 旋叶压滤机 动态过滤 

分 类 号：TQ028.53[化学工程] TQ051.85