| 叠式空气隙膜蒸馏组件膜污染实验研究 |
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| 引用本文： | 杨晓宏, 田瑞, 马淑娟, 吕海莉. 叠式空气隙膜蒸馏组件膜污染实验研究[J]. 环境工程学报, 2013, 7(3): 963-968. |
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| 作者姓名： | 杨晓宏 田瑞 马淑娟 吕海莉 |
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| 作者单位： | 1. 内蒙古工业大学能源与动力工程学院,呼和浩特 010051; 2. 内蒙古可再生能源重点实验室,呼和浩特 010051 |
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| 基金项目： | 国家自然科学基金资助项目(51266007);内蒙古重大自然科学基金资助项目(2010ZD09) |
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| 摘 要： | 采用一种具有旋流结构的多层层叠式空气隙膜蒸馏膜组件,以20 g/L氯化钠盐水为热工质,考察在70℃条件下膜污染情况,实验结果表明,一个周期的连续运行和间歇性操作膜表面在高温下较快进入膜污染,8个周期后膜通量下降为初始通量的42%。膜表面有大量黄色附着物,电镜SEM分析显示,膜表面被不均匀堆积的颗粒状污染物及长方体结晶物覆盖,能谱EDS分析,污染物有极少量NaCl结晶的Na、Cl元素,还有O、C、Mg、Cu和Fe等元素。污染膜经5%盐酸溶液清洗后无机垢沉淀被去除,表观效果较好。
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| 关 键 词： | 气隙式膜蒸馏 膜污染 膜通量 膜清洗 |
| 收稿时间： | 2012-12-29 |
Experimental study on membrane pollution of stacked air-gap membrane distillation module |
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| Yang Xiaohong, Tian Rui, Ma Shujuan, Lü Haili. Experimental study on membrane pollution of stacked air-gap membrane distillation module[J]. Chinese Journal of Environmental Engineering, 2013, 7(3): 963-968. |
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| Authors: | Yang Xiaohong Tian Rui Ma Shujuan Lü Haili |
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| Affiliation: | 1. College of Energy and Power Engineering, Inner Mongolia University of Technology, Hohhot 010051, China; 2. Renewable Energy Laboratory in Inner Mongolia, Hohhot 010051, China |
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| Abstract: | A stacked AGMD module with rotational flow structure was designed to investigate the membrane pollution situation, when the hot working medium was NaCl solution of 20 g/L and 70 ℃. The experimental results showed that membrane pollution appeared faster on membrane module under the high temperature condition in one experimental period of intermittent and continuous operation, after eight experimental periods, the flux dropped down to 42% of initial flux. The membrane surface was covered by a large number of yellow attachments. The SEM analysis showed that the yellow attachments were uneven accumulated granular pollutants and cuboid crystals. The EDS analysis showed that the pollutants had a minimum amount of Na and Cl element of NaCl crystallization, and also some O,C,Mg,Cu,Fe elements. The inorganic-scale precipitation on the fouling membrane can be wiped off with 5% hydrochloric acid solution, and the effect is good. |
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| Keywords: | air-gap membrane distillation membrane pollution mass transfer membrane washing |
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