Structural Design of a Rotating Disk Dynamic Microfilter in Improving Filtration Performance for Fine Particle Removal
Structural Design of a Rotating Disk Dynamic Microfilter in Improving Filtration Performance for Fine Particle Removal
复制标题
提高细颗粒去除过滤性能的转盘动态微过滤器的结构设计
DOI：
10.1016/j.jtice.2018.04.032
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发表时间：
2019
期刊：
影响因子：
--
通讯作者：
E. Iritani and N. Katagiri
中科院分区：
文献类型：
--
作者：
Wu;S.E.;K.J. Hwang;T.W. Cheng;K.L. Tung;E. Iritani and N. Katagiri
本研究探讨了最佳操作条件的选择和有效的旋转盘结构的设计，从海水中去除颗粒。利用计算流体力学模拟了不同操作条件下膜表面流体速度和剪切应力的分布。1型旋转盘具有两个叶片，2型旋转盘具有与1型旋转盘的叶片形状相同的四个叶片，并且3型旋转盘具有两个叶片，每个叶片的中心处具有圆孔。模拟结果表明，转盘转速是影响膜表面剪切应力的主要因素。从剪切应力估计滤饼质量和过滤通量，并使用经验公式计算。结果表明，当圆盘转速从1000 rpm增加到3000 rpm时，类型1中的通量增加了28%;在3000 rpm时，安装额外的叶片导致通量无效增加。虽然类型2表现出最高的过滤性能和最低的滤饼阻力，但类型3是最佳设计，因为它在所有测试的旋转盘类型中表现出最高的比过滤通量。具有两个带圆形孔口的叶片的旋转盘在低盘旋转速度下证明了用于从海水中去除颗粒的最佳设计和操作条件，因为它导致高过滤通量和相对低的功耗。
This study investigated the selection of optimal operating conditions and the design of efficient rotating disk structures for removing particles from seawater. The distributions of fluid velocity and shear stress on the membrane surface under various operating conditions were simulated using computational fluid dynamics. Type 1 rotating disk had two vans, Type 2 rotating disk had four vanes shaped identically to those of the Type 1 rotating disk, and Type 3 rotating disk had two vanes with circular orifices located at the center of each vane. The simulated results indicated that the disk rotation speed is the main factor affecting shear stress on the membrane surface. Cake mass and filtration flux were estimated from shear stress and were calculated using empirical equations. The results showed that flux in Type 1 increased by 28% when the disk rotation speed increased from 1000 to 3000 rpm; the installation of extra vanes caused an ineffective increase in flux at 3000 rpm. Although Type 2 exhibited the highest filtration performance and the lowest cake resistance, Type 3 is the optimal design because it exhibited the highest specific filtration flux among all tested rotating disk types. The rotating disk with two vanes with a circular orifice at a low disk rotation speed demonstrated the optimal design and operating conditions for removing particles from seawater, because it resulted in high filtration fluxes and relatively low power consumption.