| 污染聚偏氟乙烯中空纤维超滤膜的超声清洗 |
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| 引用本文： | 郭伟,晋卫,王宾,吕效平. 污染聚偏氟乙烯中空纤维超滤膜的超声清洗[J]. 化工学报, 2006, 57(12): 3040-3044 |
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| 作者姓名： | 郭伟 晋卫 王宾 吕效平 |
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| 作者单位： | 南京工业大学超声化学工程研究所,江苏,南京,210009;南京工业大学超声化学工程研究所,江苏,南京,210009;南京工业大学超声化学工程研究所,江苏,南京,210009;南京工业大学超声化学工程研究所,江苏,南京,210009 |
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| 摘 要： | 中空纤维超滤膜污染和清洗影响膜处理废水工艺的经济性及可运行性.研究了平板浸没式超声处理器（40 kHz）与2000 mg·L-1柠檬酸清洗剂对中石化某水处理厂污染聚偏氟乙烯超滤膜的清洗效果.利用自定义的除垢率和扫描电镜对清洗结果进行表征并用过滤通量来验证.证明超声对超滤膜的清洗效果显著.单根膜清洗除垢率比不加超声时提高了25%，达到80%左右，且没有破坏膜的表面和结构.得到本批污染膜及自制污染膜组件的优化清洗工艺及超声参数为：频率40 kHz、声强2200 W·m-2、超声处理时间30 min.未使用反向冲清洗，仅切向气流结合超声清洗膜面，清洗后的通量从原来污染组件的0.0368 cm3·cm-2·min-1增加到0.1254 cm3·cm-2·min-1，恢复到相当于新膜初始通量的72.5%，通量增加率达到241%.进一步证明了超声清洗膜的可行性和有效性.
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| 关 键 词： | 超声 清洗 聚偏氟乙烯 中空纤维 超滤膜 |
| 文章编号： | 0438-1157（2006）12-3040-05 |
| 收稿时间： | 2005-10-29 |
| 修稿时间： | 2005-10-292006-01-20 |
Cleaning fouled polyvinylidenefluoride hollow fibre ultrafiltration membrane by ultrasound |
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| GUO Wei,JIN Wei,WANG Bin,L Xiaoping. Cleaning fouled polyvinylidenefluoride hollow fibre ultrafiltration membrane by ultrasound[J]. Journal of Chemical Industry and Engineering(China), 2006, 57(12): 3040-3044 |
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| Authors: | GUO Wei JIN Wei WANG Bin L Xiaoping |
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| Affiliation: | GUO Wei,JIN Wei,WANG Bin,L(U) Xiaoping |
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| Abstract: | Hollow fibre ultrafiltration membrane is frequently employed in the water treatment processes.However, the fouling of ultrafiltration membrane significantly affects the economics of the process.In this study the fouled polyvinylidenefluoride ultrafiltration membrane and its module were cleaned by flat ultrasonic treatment with 2000 mg·L-1 citric acid.The cleaning results were determined by a cleaning ratio defined by the authors and SEM, and also validated by membrane flux.Ultrasound was shown to be beneficial to cleaning and the cleaning ratio was 80% with no damage of membrane and was 25% more than that without ultrasonic treatment.The optimal ultrasonic treatment parameters were: frequency 40 kHz,sound intensity 2200 W·m-2,treatment time 30 min.For the fouled module, the flux increased from 0.0368 cm3·cm-2·min-1 to 0.1254 cm3·cm-2·min-1,i.e., the flux recovery was 72.5% of the new membrane without back purge and the flux was increased to 241% of the initial flux of fouled membrane. |
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| Keywords: | ultrasound cleaning polyvinylidenefluoride hollow fibre ultrafiltration membrane |
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