基于膜蒸馏技术的PTFE中空纤维膜处理印染反渗透浓水  

VACUUM MEMBRANE DISTILLATION FOR TREATMENT OF REVERSE OSMOSIS CONCENTRATES GENERATED IN DYE WASTEWATER BY USING PTFE HOLLOW FIBER MEMBRANE

作　　者：张姣姣[1] 朱海霖[1] 郭玉海[1] 李玖明 吴益尔 陈建勇[1] 

机构地区：[1]浙江省丝纤维材料和加工技术重点实验室,浙江理工大学,浙江杭州310018 [2]浙江东大集团有限公司,浙江诸暨311800

出　　处：《水处理技术》2014年第3期75-79,共5页Technology of Water Treatment

基　　金：国家科技支撑计划(2013BAC01B01);教育部新世纪优秀人才支撑计划(NCET-10-0980);浙江省重大科技专项重大社会发展项目(2012C13006-2);浙江省公益性技术应用研究计划项目(2012C21027);浙江省新苗人才计划项目(2013R406031);浙江理工大学优秀研究生学位论文培育基金(2013YSPY13)

摘　　要：通过调节挤出头的尺寸和拉伸倍数,制备出4种不同壁厚和孔径的聚四氟乙烯(PTFE)中空纤维膜。采用真空膜蒸馏(VMD)技术处理印染反渗透(RO)浓水,研究了壁厚和孔径、料液温度、浓缩倍数等对处理效果的影响;并进行了连续运行20 d测试。结果表明,减小膜丝壁厚、增加膜孔径和料液温度均可增加产水通量,浓缩倍数增加会降低产水通量;产水通量随工作时间的延长而减小,膜丝经HCl水溶液清洗后,产水通量能恢复至初始通量的95%以上;产水TDS、COD和色度的去除率均保持在95%以上。Four kinds ofpolytetrafluoroethylene （PTFE） hollow fiber membranes with different wall thicknesses and pore sizes were prepared through changing the parameters of extrusion head and stretching ratios in this paper. The effects of wall thickness, pore size, feed temperature and concentration times on the permeate flux and production indicators were investigated by means of vacuum membrane distillation （VMD）. The experimental results showed that the permeate flux increased with the decrease of wall thickness. Increasing the pore size of PTFE hollow fiber membrane and feed temperature were positive for the permeate flux. However, the permeate flux decreased with the increase of concentration time. The continuous tests in 20 d showed that the permeate flux decreased with the extension of working time. However, the permeate flux recovered to over 95% of the initial permeate flux after washing by the HCl solution. The rejections of TDS, COD and chroma in the permeate were more than 95%.

关 键 词：聚四氟乙烯中空纤维膜 真空膜蒸馏 印染反渗透浓水 

分 类 号：TQ028.8[化学工程] X788[环境科学与工程—环境工程]