摘要
随着工业不断发展,含油废水的有效治理引起了人们的关注,寻求一种高效节能的油水分离方法迫在眉睫。本文分别以不锈钢金属丝网和不锈钢多孔板为基底,采用喷涂-高温塑化的方法制备了超疏水网膜及板膜。利用超疏水膜进行油水分离实验并探究了不同操作条件对分离效果的影响,得到当初始含油量低于50 g/L时,其对分离效率影响不大;板膜的分离效率随油水混合物流量的增加而降低,随分离压差的增大而增大;油水混合物流量对网膜分离效率的影响不大。分析机理发现,利用超疏水膜进行油水分离是基于油和水在膜层表面润湿性的差异,油能润湿表面并透过膜层,而水不能润湿表面无法透过膜层,从而实现油水分离。
With the continuous development of industry, the efficient treatment of oily wastewater has attracted attentions and it is urgent to seek an efficient energy-saving oil-water separation method. With stainless steel mesh and porous plate as substrate respectively, the mesh and porous plate coating with super-hydrophobic membrane were prepared by spraying-plasticizing method. Based on super-hydrophobic membrane, the further experiment on oil-water separation was performed to investigate the effects of different operating conditions on separation efficiency. It can be found that, the initial oil content has less significant effect on the separation efficiency, when it is less than 50 g/L; the separation efficiency of plate membrane declines with the increase of oil-water mixture flowrate and improves with the increase of separation pressure; the oil-water mixture flowrate has less significant effect on the separation efficiency of mesh membrane. The separation mechanism was analyzed and showed that the separation was based on the wettability difference of oil and water on the super-hydrophobic surface. The oil can wet and penetrate through membrane while the water can＇t, so as to realize the separation of oil and water.
出处
《工程热物理学报》
EI
CAS
CSCD
北大核心
2018年第2期341-347,共7页
Journal of Engineering Thermophysics
基金
国家自然科学基金资助项目(No.51376030)
关键词
超疏水
网膜
板膜
油水分离
super-hydrophobic
mesh membrane
plate membrane
oil-water separation
