基于CFD仿真模拟及PIV粒子示踪相结合法超滤膜组件优化
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摘要
采用在线监测与水力流体模拟相结合方式,利用数值模拟仿真技术、示踪技术及高速图像采集分析等手段,考察现有超滤膜组件内部的流场分布,并设计出新型超滤膜组件。结果表明,由于超滤膜组件内部流场主要受到布水管布水的影响,布水管上开孔均匀与否将直接影响整个超滤膜组件内部布水的均匀性。与组件UFA-860C相比,设计出的条形孔超滤膜组件因其布水管上有规则地均匀开孔且采用多根布水管组合,在运行时组件内部布水更加均匀,且能够充分利用膜丝的有效面积,从而有效减缓膜污染。
Based on the combination of online monitoring and hydraulic fluid simulation, the distribution of flowing field inside the existing UF membrane component was investigated by means of numerical simulation, tracer technology and high-speed image acquisition and analysis, and new UF membrane components was designed. The results show that the internal flow field of UF membrane component is mainly affected by the cloth pipe, and the uniformity of opening of the water pipe directly affects the uniformity of water distribution inside the UF membrane component. Compared with the component of UFA-860 C, the strip-hole UF membrane component has the ability to make better use of the effective area of UF membrane wire at the operating time, thus effectively reducing the membrane pollution.
Based on the combination of online monitoring and hydraulic fluid simulation, the distribution of flowing field inside the existing UF membrane component was investigated by means of numerical simulation, tracer technology and high-speed image acquisition and analysis, and new UF membrane components was designed. The results show that the internal flow field of UF membrane component is mainly affected by the cloth pipe, and the uniformity of opening of the water pipe directly affects the uniformity of water distribution inside the UF membrane component. Compared with the component of UFA-860 C, the strip-hole UF membrane component has the ability to make better use of the effective area of UF membrane wire at the operating time, thus effectively reducing the membrane pollution.
引文
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[15] 阮驰,孙传东,白永林,等.水流场PIV测试系统示踪粒子特性研究[J].实验流体力学,2006,20(2):72-77.(RUAN Chi,SUN Chuandong,BAI Yongling,et al.The characteristics of the tracer particles usedin water flow field for PIV system[J].Journal of Experiments in Fluid Mechanics,2006,20(2):72-77.(in Chinese))
[ 2 ] 龚玲,钟成华,邓春光.膜分离技术的现状及发展[J].中国科技信息,2005,2(23):30.(GONG Ling,ZHONG Chenghua,DENG Chunguang.Status and development of membrane separation technology[J].China Science and Technology Information,2005,2(23):30.(in Chinese))
[ 3 ] TIAN J Y,ERNST M,CUI F,et al.Correlations of relevant membrane foulants with UF membrane fouling in different waters[J].Water Research,2013,47(3):1218-1228.
[ 4 ] 邱运仁,张启修.超滤过程膜污染控制技术研究进展[J].现代化工,2002,22(2):18-21.(QIU Yunren,ZHANG Qixiu.Research progress in membrane fouling control in ultrafiltration[J].Modern Chemical Industry,2002,22(2):18-21.(in Chinese))
[ 5 ] 齐鲁,王洪臣,郑祥,等.超滤膜在饮用水处理中临界通量的影响因素研究[J].工业用水与废水,2011,42(6):10-14.(QI Lu,WANG Hongchen,ZHENG Xiang,et al.Factors affecting critical flux of ultrafiltration membrane in drinkingwater treatment[J].Industrial Water & Wstewater,2011,42(6):10-14.(in Chinese))
[ 6 ] 李圭白,田家宇,齐鲁.第三代城市饮用水净化工艺及超滤的零污染通量[J].给水排水,2010,36(8):11-15.(LI Guibai,TIAN Jiayu,QI Lu.The third generation of urban drinking water treatment process andzero-membrane fouling flux of ultrafiltration[J].Water Supply and Sewerage,2010,36(8):11-15.(in Chinese))
[ 7 ] 雷晓玲.给水超滤膜系统中曝气对膜通量的影响及其机理研究[J].给水排水,2009,35(11):129-135.(LEI Xiaoling.Study on mechanisms and impacts of aeration on the membraneflux in drinking water ultrafiltration membrane treatment[J].Water Supply and Sewerage,2009,35(11):129-135.(in Chinese))
[ 8 ] 康华,何文杰,王胜江,等.PVDF 膜污染及清洗试验研究[J].给水排水,2008,34(4):12-16.(KANG Hua,HE Wenjie,WANG Shengjiang,et al.Experimental study on fouling and cleaning of PVDF membrane[J].Water Supply and Sewerage,2008,34(4):12-16.(in Chinese))
[ 9 ] 肖建平.UF膜组件的有机污染及清洗[J].重庆建筑大学学报,2005,27(4):74-76.(XIAO Jianping.Organic fouling and cleaning of UF membrane[J].Journal of Chongqing Jianzhu University,2005,27(4):74-76.(in Chinese))
[10] 张强,刘燕,魏源源,等.饮用水消毒预处理工艺研究进展[J].化学通报,2010,73(11):980-985.(ZHANG Qiang,LIU Yan,WEI Yuanyuan,et al.Research progress on pretreatment technology for drinking water disinfection[J].Chemical Bulletin (Printed Edition),2010,73(11):980-985.(in Chinese))
[11] 秦洪春,郭金涛,李伟英,等.预处理工艺控制膜污染的研究进展[J].水处理技术,2011,37(3):1-4,10.(QIN Hongchun,GUO Jintao,LI Weiying,et al.Research progress on pretreatment of the effects on membrane fouling[J].Water Treatment Technology,2011,37(3):1-4,10.(in Chinese))
[12] YOON S H,LEE S,YEOM I T.Experimental verification of pressure drop models in hollow fiber membrane[J].Journal of Membrane Science,2008,310(1):7-12.
[13] 严丹燕,辛永光,黎华恒.内压式中空超滤膜组件的流场分布分析[J].广东化工,2012,39(4):190-191.(YAN Danyan,XIN Yongguang,LI Huaheng.Analysis for flow field distribution in inside-flow hollow UF membrane module[J].Guangdong Chemical Industry,2012,39 (4):190-191.(in Chinese))
[14] 张凯,王瑞金,王刚.Fluent技术基础与应用实例[M].北京:清华大学出版社,2010:1-4.
[15] 阮驰,孙传东,白永林,等.水流场PIV测试系统示踪粒子特性研究[J].实验流体力学,2006,20(2):72-77.(RUAN Chi,SUN Chuandong,BAI Yongling,et al.The characteristics of the tracer particles usedin water flow field for PIV system[J].Journal of Experiments in Fluid Mechanics,2006,20(2):72-77.(in Chinese))
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