陶瓷膜基高岭土动态膜制备和油水分离  

Preparation of kaolin dynamic membrane based on ceramic support and its application in separation of oil-in-water emulsion

作　　者：潘艳秋[1] 陈银平[1] 王文娟[1] 马伟[1] 

机构地区：[1]大连理工大学化工与环境生命学部,辽宁大连116024

出　　处：《化学工程》2014年第7期60-65,共6页Chemical Engineering(China)

基　　金：国家自然科学基金资助项目(20976020)

摘　　要：以管式陶瓷膜为基膜、以高岭土为涂膜材料制备无机质基动态膜并用于油水分离。采用灰色关联分析法,得到动态膜制备和油水分离过程中操作条件对油水分离稳定通量的关联次序,并以此为基础,研究其中的涂膜条件对动态膜分离性能的影响。结果表明:随着流量、涂膜时间、涂膜压差和涂膜液质量浓度的增大,油水分离稳定通量均呈先增后减的趋势;最佳涂膜操作条件为:流量80 L/h、涂膜时间25 min、涂膜压差0.14 MPa、涂膜液质量浓度0.5 g/L;与基膜直接油水分离相比,动态膜能较好地减轻膜污染,增大油水分离稳定通量。文中还提出了动态膜油水分离影响因子R的概念,以考察涂膜参数对油水分离稳定通量的影响程度,进一步验证了灰色关联分析结果的可靠性。An inorganic dynamic membrane （DM）was prepared and applied to separation of oil-in-water emulsion. Kaolin was selected as the coating material which was deposited on the inner surface of a porous ceramic tube.The grey relational analysis （GRA）method was used to study the effects of various operation parameters on the stable permeate flux during DM formation and separation.The sorting of relational degree was obtained to be cross-flow velocity ＆gt;trans-membrane pressure difference of separation ＆gt;coating time ＆gt;pressure difference of preparation＆gt;coating suspension mass concentration ＆gt; coating suspension temperature ＆gt; oil concentration. Single-factor experiments were then conducted to investigate the effects of coating conditions on DM separation performance.The results show that the stable flux of oil-in-water emulsion separation increases first and then decreases with increasing in cross-flow velocity,coating time,pressure difference of preparation and coating suspension mass concentration. The optimal coating conditions were determined as follows：cross-flow velocity 80 L/h,coating time 25 min, pressure difference of preparation 0.14 MPa and coating suspension mass concentration 0.5 g/L.The DMs prepared under the optimal conditions display the properties of anti-fouling and increased stable flux in separation of oil-in-water emulsion compared with the ceramic support without coating.In order to examine the influence of operating conditions on the stable flux,the separation factor R was proposed,with which the GRA reliability was accordingly verified.

关 键 词：动态膜 陶瓷膜 灰色关联分析 单因素实验 油水分离 

分 类 号：TQ028.8[化学工程]