陶瓷膜澄清厚朴水提液膜污染机理的研究  

Study of fouling mechanism in magnolia official aqueous extract clarification by ceramic membranes

作　　者：李梅生[1] 赵宜江[1] 周守勇[1] 李卫星[2] 邢卫红[2] 

机构地区：[1]淮阴师范学院化学系江苏省低维材料化学重点实验室,江苏淮安223300 [2]南京工业大学膜科学技术研究所,江苏南京210009

出　　处：《化学工程》2007年第12期34-37,共4页Chemical Engineering(China)

基　　金：国家重点基础研究973项目(2003CB615707);江苏省高校自然科学研究计划项目(05KJB530009)

摘　　要：采用一个经典模型描述了厚朴水提液过滤过程中的通量衰减,通过模型参数分析了膜的污染机理。分析结果表明孔径为50,200,500 nm的陶瓷膜主要由'完全孔堵塞'机理、'滤饼过滤'机理和'部分孔堵塞'机理控制;通过此污染机理的分析来指导膜清洗,孔径为50,200,500 nm的陶瓷膜清洗后分别恢复了84.5%,89.4%和90.0%左右;实验表明孔径为200 nm的陶瓷膜较适合厚朴水提液体系。The observed flux decay of different pore size ceramic membrane was modeled using a modified differential equation used to describe classical dead-end filtration process. The results reveal that the separation processes of 50 nm, 200 nm and 500 nm ceramic tubular membranes are controlled by ＂complete pore blocking＂, ＂cake filtration ＂ and ＂ intermediate blocking filtration ＂ mechanism respectively. According to the fouling mechanism, a feasible cleaning method was found. And the membrane water flux recovery rate is 84.5%, 89.4% and 90.0% respectively. The results show that the 200 nm ceramic membrane is more suitable for the system.

关 键 词：陶瓷膜 厚朴水提液 膜污染 清洗 

分 类 号：TQ028.8[化学工程]