超滤膜组件结构与性能研究  

THE RESEARCH OF ULTRAFILTRATION MEMBRANE MODULE STRUCTURE AND PERFORMANCE

作　　者：左滢[1] 沈菊李[2] 吕晓龙[1] 朱圆圆[1] 

机构地区：[1]天津工业大学生物化工研究所,省部共建中空纤维膜材料与膜过程国家重点实验室培育基地,天津300387 [2]杭州水处理技术研究开发中心有限公司,浙江杭州310012

出　　处：《水处理技术》2014年第9期101-104,共4页Technology of Water Treatment

基　　金：国家海洋局海洋公益性行业科研专项项目(201105025);浙江省重点创新团队自主设计项目(2009R50047)

摘　　要：采用新型膜组件结构,通过控制膜组件的出水阀门,考察了单端与双端出水结构形式的膜组件分别在高、低产水量下运行情况,并进行了化学清洗研究。结果表明,由于超滤膜的出水方式的不同,因而超滤膜的跨膜压力变化、膜污染与清洗情况均有较大差异。与单端出水方式相比,双端出水结构形式的膜组件在高低两种产水条件下跨膜压力增长速度、膜污染速度都更加缓慢,且在高产水量的运行条件下优势更加明显。每个反洗周期内双端出水的跨膜压力始终小于单端出水,而反洗后跨膜压力恢复效果也要优于单端出水。在化学清洗前进行物理清洗可以去除膜表面大部分的沉积物,产水透过率恢复率可达30%。采用在酸洗后加入质量浓度300mg/L的NaClO+NaOH(pH为11.4)药液清洗效果较好,说明污染物的主要组成为细菌和有机物,洗后产水透过率恢复率可达99%。The author used membrane module to control the water valve for investigation of the running condition of membrane module, which has singleended and double-ended effluent structural style. In addition, the chemical cleaning testing was also studied in this research. The results show that the transmembrane pressure, membrane fouling and cleaning effect are quite different due to the different effluent ways ofultrafiltration membranes. Compared to the single-end effluent way, the growth rates of transmembrane pressure and membrane fouling of the double-ends effluent way are slower trader two kinds of membrane flux conditions. While in the high flux condition, the advantage of double-ends structure is more obvious. In every operation term, the double-ends transmembrane pressure is always less than single-end structure, and the transmembrane pressure recovery performance of double-ends effluent will be better after the backwashing. Before the chemical cleaning, a physical cleaning could remove most sediment on membrane surface and the permeability recovery could achieve 30%. The best cleaning approach is adding 300 mg/L （pH 11 .4） of NaC1O＋NaOH after acid cleaning. In that case, the permeability recovery will achieve 99%, therefore most of the membrane fouling components are bacteria and organic pollutant.

关 键 词：超滤膜 组件结构 出水方式 化学清洗 

分 类 号：TQ028.8[化学工程]