多孔陶瓷膜双向过滤阻力试验分析  

Analysis on the Bi-directional Filtration Resistances of Porous Ceramic Membrane

作　　者：吕玉正[1] 方涛 师杰[1] 梁鹏 梁恒国[1] 

机构地区：[1]后勤工程学院营房管理与环境工程系,重庆401311 [2]北京军区建筑设计研究院,北京100087 [3]总后勤部建筑工程规划设计研究院,北京100036

出　　处：《后勤工程学院学报》2013年第1期34-39,共6页Journal of Logistical Engineering University

基　　金：质检公益性行业科研专项基金项目(200910140-03)

摘　　要：为研究多孔陶瓷膜过滤阻力,提出了多孔陶瓷膜双向过滤方式,分析了9通道多孔陶瓷膜在双向过滤时的有效过滤面积和通道截面积,建立了过滤阻力关系式。试验结果表明,跨膜压差0.05～0.10 MPa、错流速度1.8 m/s时,浓差极化阻力Rp为主要过滤阻力;跨膜压差0.10～0.25 MPa、错流速度1.0～2.2 m/s时,吸附沉积阻力Rd为主要过滤阻力;跨膜压差0.15 MPa、错流速度2.2～3.0 m/s时,膜自身阻力Rm是主要过滤阻力;增大错流速度能够有效延缓浓差极化的发生,减小吸附沉积层的厚度,减轻膜污染,延长过滤周期。In order to explore the function ＆ type of filtration resistances of porous ceramic membrane, the bi-directional filtering way is proposed, the effective filtration area and channel sectional area of 9-channel porous ceramic membrane are analyzed for the bi -directional filtering way, and the calculation formula for the hi-directional filtration resistances is established. The test results show that 1 ） the concentration polarization resistance R is the main filtration resistance under trans-membrane pressure 0.05-0.10 MPa and cross-flow velocity 1.8 m/s ; 2） the adsorption and deposit resistance Ra is the main one under trans-membrane pressure 0.10-0.25 MPa and cross-flow velocity 1.0-2.2 m/s ; 3 ） at trans-membrane pressure 0.15 MPa and cross-flow velocity 2.2-3.0 m/s, R of membrane itself is the main one ; and 4） the increase of the cross-flow velocity can effectively delay the occurrence of concentration polarization and reduce the thickness of the sedimentary adsorption layer, thus easing the membrane pollution and extending the filtration cycle.

关 键 词：陶瓷膜 过滤阻力 跨膜压差 错流速度 

分 类 号：TQ028.8[化学工程]