| PVDF疏水中空纤维膜的膜蒸馏含盐废水处理性能研究 |
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| 引用本文： | 武春瑞,刘东,陈华艳,贾悦,王暄,吕晓龙.PVDF疏水中空纤维膜的膜蒸馏含盐废水处理性能研究[J].功能材料,2008,39(12). |
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| 作者姓名： | 武春瑞 刘东 陈华艳 贾悦 王暄 吕晓龙 |
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| 作者单位： | 天津工业大学生物化工研究所;中空纤维膜材料与膜过程教育部重点实验室; |
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| 基金项目： | 国家高技术研究发展计划(863计划)
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国家自然科学基金
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国家科技支撑计划
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| 摘 要： | 利用新型高通量聚偏氟乙烯(PVDF)中空纤维疏水膜,对石化企业废水经反渗透(RO)处理的浓排水进行减压膜蒸馏(VMD)处理实验.研究了RO浓排水流速、温度和冷侧真空度对VMD过程中PVDF膜性能的影响,考察了PVDF膜在VMD法RO浓水浓缩过程中的性能变化.结果表明,原液流速对膜性能无明显影响;原液温度或冷侧真空度提高都会使膜的产水通量明显上升,而产水电导保持稳定.在冷侧真空度为-0.095MPa、原液温度70℃、流速0.66m/s的条件下,经15.2h实验,将RO浓排水浓缩20倍,膜的产水通量从25.8L/(m2*h)降低至11.8L/(m2*h),产水电导低于4霺/cm,脱盐率高于99.99%,产水CODCr值约30mg/L.经过5次浓缩实验后,PVDF膜的通量和产水电导均保持稳定.
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| 关 键 词： | 减压膜蒸馏 聚偏氟乙烯 疏水膜 中空纤维膜 废水处理 |
Study on the membrane distillation performance of polyvinylidene fluoride hydrophobic hollow fiber membranes in salt containing wastewater treatment |
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| WU Chun-rui,LIU Dong,CHEN Hua-yan,JIA Yue,WANG Xuan,LV Xiao-long.Study on the membrane distillation performance of polyvinylidene fluoride hydrophobic hollow fiber membranes in salt containing wastewater treatment[J].Journal of Functional Materials,2008,39(12). |
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| Authors: | WU Chun-rui LIU Dong CHEN Hua-yan JIA Yue WANG Xuan LV Xiao-long |
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| Abstract: | Novel high flux polyvinylidene fluoride(PVDF) hydrophobic hollow fiber membrane was applied in vacuum membrane distillation(VMD) process for the treatment of reverse osmosis(RO) concentrated wastewater from a petrochemical industry.The effects of the flowing velocity and temperature of the feed solution,and the vacuum pressure on the performance of PVDF membrane were studied.The performance of the membrane in VMD concentration experiment of the wastewater was also tested.The results showed that,the product ... |
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| Keywords: | vacuum membrane distillation polyvinylidene fluoride hydrophobic membrane hollow fiber membrane wastewater treatment |
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