应用超声时域反射法和信号拟合及量化模型在线监测卷式反渗透膜元件污染及清洗过程.实验采用三个2.25 MHz高频聚焦探头和商业卷式反渗透膜组件,污染液为1.0 g/L硫酸钙.清洗阶段包括纯水冲洗、浸洗与酸洗三部分.结果表明,超声信号能够穿透组件外壳而进入多层膜结构.观察发现随膜表面污染物沉积而超声信号发生系列有序变化.此外,随膜表面污染物沉积、结构变化以及污染层形成,声强不断减小至最低,后期趋于稳定.研究还发现,沿进料液流动方向,信号变化诱导期趋于变短,而且,污染物优先靠近出口处沉积；越靠近料液出口,信号变化幅度越大,污染越严重.这是由于沿轴向不断加剧的浓差极化所致.在清洗阶段,随着膜通量恢复超声信号变化表现出一致性.
参考文献
| [1] | Tolaro Goto .East and South East Asia[J].Desalination & Water Reuse,2002,12(01):28-30. |
| [2] | 孟庆义,袁生,陈衍东.反渗透技术在电站锅炉水处理中的应用[J].氮肥技术,2007(04):25-26,42. |
| [3] | Noka Prihasto;Oj-Feng Liu;Seung-Hyun Kim .Pre-treatment strategies for seawater desalination by reverse osmosis system[J].Desalination: The International Journal on the Science and Technology of Desalting and Water Purification,2009(1):308-316. |
| [4] | Li JX.;Sanderson RD.;Jacobs EP. .Non-invasive visualization of the fouling of microfiltration membranes by ultrasonic time-domain reflectometry[J].Journal of Membrane Science,2002(1/2):17-29. |
| [5] | Matthias Gloede;Thomas Melin .Physical aspects of membrane scaling[J].Desalination: The International Journal on the Science and Technology of Desalting and Water Purification,2008(1/3):71-75. |
| [6] | David Hasson;Alexander Drak;Raphael Semiat .Inception of CaSO_4 scaling on RO membranes at various water recovery levels[J].Desalination: The International Journal on the Science and Technology of Desalting and Water Purification,2001(1/3):73-81. |
| [7] | Chan Mya Tun;Anthony Gordon Fane;Jose Thomas Matheickal;Roya Sheikholeslami .Membrane distillation crystallization of concentrated salts—flux and crystal formation[J].Journal of Membrane Science,2005(1/2):144-155. |
| [8] | Rahardianto A;Shih WY;Lee RW;Cohen Y .Diagnostic characterization of gypsum scale formation and control in RO membrane desalination of brackish water[J].Journal of Membrane Science,2006(1/2):655-668. |
| [9] | Chong T H;Wong F S;Fane AG .Fouling in reverse osmosis:detection by nor-invasive techniques[J].Desalination,2007,204:148-154. |
| [10] | Li JX;Sanderson RD;Chai GY .A focused ultrasonic sensor for in situ detection of protein fouling on tubular ultrafiltration membranes[J].Sensors and Actuators, B. Chemical,2006(1):182-191. |
| [11] | Xu X C;Li J X;Li H S et al.Non-invasive monitoring of fouling in hollow fiber membrane via UTDR[J].Journal of Membrane Science,2009,326:103-110. |
| [12] | Bhattacharyya D;Butterfield D A.In new insights into membrane science and technology:Polymeric and biofunctional membranes[M].Amsterdam:Elsevier Science,2003:65-88. |
| [13] | G.-Y.Chai;A.R.Greenberg;W.B.Krantz .Ultrasound,gravimetric,and SEM studies of inorganic fouling in spiral-wound membrane modules[J].Desalination: The International Journal on the Science and Technology of Desalting and Water Purification,2007(1/3):277-293. |
| [14] | Lin J B;Li J X;An J H.UTDR as a non-destructive technique to detect membrane fouling in a spiral-wound RO module[A].北京,2009:102. |
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