为了研究中空纤维超滤膜组件通量分布,建立了基于膜丝实体为骨架的三维多孔介质模型,通过商用有限体积法软件求解管壳程以及膜丝多孔区纯水渗透过程的控制方程,得到管壳程的流场信息和多孔区的通量分布.研究表明,任意膜丝和膜丝束均存在通量分布的三维不均匀性,局部高通量增大了设备能耗,降低了组件效率;增大进出口压差降低了通量分布的均匀性,由于考虑了进口效应而更接近实际;膜丝渗透性的提高降低了通量分布的均匀性,在本文研究范围内,相同的进出口压差,膜丝渗透性提高5倍,产水量仅提高10％.本文计算流体力学模型适用于膜丝单元和膜组件研究,与实验偏差均在10％以内,可用于指导组件设计和优化.
参考文献
| [1] | Xing Yang;Rong Wang;Anthony G. Fane;Chuyang Y. Tang;I.G. Wenten.Membrane module design and dynamic shear-induced techniques to enhance liquid separation by hollow fiber modules: a review[J].Desalination and water treatment: Science and engineering,201316/18(16/18):3604-3627. |
| [2] | P. Harmant;P. Aimar.Coagulation of Colloids Retained by Porous Wall[J].AIChE Journal,199612(12):3523-3532. |
| [3] | S.Chang;A.G.Fane.The effect of fibre diameter on filtration and flux disrtribution- relevance to submerged hollow fibre modules[J].Journal of Membrane Science,20012(2):221-231. |
| [4] | 王捷;张宏伟;贾辉;李波.浸没式中空膜纤维尺寸的优化模拟[J].膜科学与技术,2008(1):31-34,39. |
| [5] | 杨毅;王保国.中空纤维膜接触器的计算流体力学模拟[J].天津工业大学学报,2008(3):32-35. |
| [6] | 杨毅;王保国;彭勇.中空纤维膜组件壳程流动的数值模拟[J].化工学报,2008(8):1979-1985. |
| [7] | Bessiere Y;Fletcher DF;Bacchin P.Numerical simulation of colloid dead-end filtration: Effect of membrane characteristics and operating conditions on matter accumulation[J].Journal of Membrane Science,20081/2(1/2):52-59. |
| [8] | Serra C.;Moulin P.;Rouch JC.;Aptel P.;Clifton MJ..Dead-end ultrafiltration in hollow fiber modules: Module design and process simulation[J].Journal of Membrane Science,19982(2):159-172. |
| [9] | William L. Oberkampf;Timothy G. Trucano.Verification and validation in computational fluid dynamics[J].Progress in Aerospace Sciences,20023(3):209-272. |
| [10] | G.A. Fimbres-Weihs;D.E. Wiley.Review of 3D CFD modeling of flow and mass transfer in narrow spacer-filled channels in membrane modules[J].Chemical Engineering and Processing,20107(7):759-781. |
| [11] | Kim J;DiGiano FA.Defining critical flux in submerged membranes: Influence of length-distributed flux[J].Journal of Membrane Science,20061/2(1/2):752-761. |
| [12] | Yoon SH;Lee S;Yeom IT.Experimental verification of pressure drop models in hollow fiber membrane[J].Journal of Membrane Science,20081/2(1/2):7-12. |
上一张
下一张
上一张
下一张
计量
- 下载量()
- 访问量()
文章评分
- 您的评分：
-
10%
-
20%
-
30%
-
40%
-
50%