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.
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)
关键词
陶瓷膜
过滤阻力
跨膜压差
错流速度
ceramic membrane
filtration resistance
trans-membrane pressure
cross-flow velocity
