浸没管式MBR特性及其膜过程  

Immersed tubular MBR and its membrane process

作　　者：朱春瓶 张春芳[1] 白云翔[1] 孙余凭[1] 顾瑾[1] 

机构地区：[1]食品胶体与生物技术教育部重点实验室化学与材料工程学院江南大学,无锡214122

出　　处：《膜科学与技术》2015年第5期24-29,共6页Membrane Science and Technology

基　　金：江苏省产学研前瞻性联合研究项目(BY2013015-06;BY2013015-28)

摘　　要：从流体力学角度,研究管式MBR膜过滤过程特性.结果表明,单管膜的圆柱形形体特征造成边界层的变化,湍动增强,较一般的平板膜面更有利于抑制膜面污染层的形成;而组件内膜管间的边界层相互干扰效应改变了单管膜的边界层形态,扰动加剧,有效弱化了污染层的形成.管式MBR正三角形错排结构由于其规整的几何形状能获得较好的水力学特性,膜通量最高;等腰三角形错排结构次之,顺排结构表现相对弱些;同时,适当提高曝气强度能增强气液混合流在膜管间的交互作用,显著提高膜通量.From the view of fluid mechanics,the characteristics of tubular MBR membrane filtration process were studied.Results showed that the cylindrical shape characteristics of the single tube membrane caused the change of the boundary layer and enhanced the turbulence compared to the general flat membrane surface,which was more conductive to curb the formation of pollution layer on the membrane surface.The mutual interference effect of boundary layer between membrane tubes in the module changed the form of the boundary layer of the single tube membrane,intensified the disturbance,and effectively reduced the pollution layer formation.Due to its neat geometric shapes,tubular MBR of triangular staggered structure can achieve good hydraulic characteristics and the highest membrane flux,that of isosceles staggered structure has moderate flux,that of in-line structure has relatively weak flux.Increasing aeration strength can also enhance the interaction of the gas-liquid mixed flow between the membrane tubes and increase significantly the membrane flux.

关 键 词：管式MBR 污染层阻力 组件结构 边界层 

分 类 号：TQ028.8[化学工程]