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多效膜蒸馏技术用于深度浓缩多种无机盐水溶液

作者：王平¹，秦英杰¹，²，刘晶¹，刘建军¹，张昆明¹，崔东胜²

单位： 1.天津大学化工学院，天津300072；2.天津凯铂能膜工程技术有限公司，天津300308

关键词：多效膜蒸馏；无机盐；深度浓缩；膜通量；造水

DOI号：

分类号： TQ028.8

出版年,卷(期):页码： 2014,34(4):39-44

摘要：

利用中空纤维气隙式多效膜蒸馏组件浓缩处理硫酸盐、盐酸盐、硝酸盐和碳酸盐等16种无机盐水溶液，研究料液浓度在0.5%~40%之间变化时对膜通量和造水比的影响。实验结果表明，料液浓度升高，膜通量和造水比总体呈下降趋势。造成膜通量和造水比下降的因素包括料液蒸汽压、粘度、扩散系数、比热容和热导率随浓度的变化，但蒸汽压下降是主要因素。钾盐、铵盐、硫酸盐、硝酸盐的浓度升高对膜通量和造水比影响较小，而盐酸盐、镁盐的浓度升高对膜通量和造水比影响较大。对于所有测验的浓度为18%的料液，膜通量值均可达2.30L•m-2•h-1以上，造水比在6.5以上，至少相当于9效蒸发器的能效果。整个实验期间膜组件性能良好，所有研究的无机盐的截留率均在99.9%以上。

Multiple-effect membrane distillation (MEMD) based on hollow fiber air-gap membrane distillation module was used to concentrate sixteen kinds of aqueous solutions of inorganic salts include sulfate, chloride, nitrate and carbonate. The influence of feed-in concentration of 0.5~40wt% on the performance of MEMD process such as trans-membrane flux (J) and gained output ratio (GOR) was studied experimentally. The experimental data indicated that both J and GOR decreased with the increase of feed-in concentration. The factors responsible for this phenomena included vapor pressure、viscosity、diffusion coefficient、specific heat capacity and thermal conductivity, however vapor pressure played a major role. The concentration of potassium salts, ammonium salts, sulfate and nitrate have less effects on J and GOR, however，the concentration of hydrochloride and magnesium salts have greater effects on J and GOR. Furthermore for all feed streams of inlet concentration of 18%, the value of J was above 2.30（L•m-2•h-1）and the value of GOR was above 6.5, which was similar with the thermal-efficiency of nine-effect distillation. During the experimental period, membrane module demonstrated excellent performance as indicated by the rejection rate of >99.9% for all the inorganic salts tested.

基金项目：

作者简介：

王平（1989-），女，安徽宿州人，硕士研究生，从事膜法分离及废水处理方面的研究.E-mail:qingping89@163.com

参考文献：

[1]胡庆福，宋丽英，胡晓湘. 中国无机盐工业近五十年发展概况[J].无机盐工业，2011,43(6):1-6
[2]汪家铭. 利用电渗析技术处理硝酸铵冷凝废水[J].工业用水与废水，2009,40(4)：60-62
[3]刘东，武春瑞，吕晓龙. 减压膜蒸馏法浓缩反渗透浓水试验研究[J].水处理技术，2009,35(5):60-63
[4]马玖彤，安卫东，张凤君. 结晶膜蒸溜回收废水中NH4Cl的研究[J].水处理技术，2005,31(1):26-28
[5]王许云，张林，陈欢林. 膜蒸溜技术最新研究现状及进展[J].化工进展，2007,26(2):168-179
[6]El-Bourawi M S, Ding Z, Ma R，etal. A framework for better understanding membrane distillation separation process [J]. Journal of Membrane Science, 2006, 285:4–29
[7] Khayet M. Membranes and theoretical modeling of membrane distillation: A review [J].Advances in Colloid and Interface Science, 2011,164:56–88
[9]吕晓龙. 膜蒸馏过程探讨[J].膜科学与技术，2010, 3(30):1-10
[10]Alkhudhiri A, Darwish N, Hilal N. Treatment of high salinity solutions: Application of air gap membrane distillation [J].Desalination, 2012,287,：55–60
[11]赵晶，武春瑞，吕晓龙. 膜蒸馏海水淡化过程研究：三种膜蒸馏过程比较[J].膜科学与技术，2009, 29(1):83-89
[12]Safavi M, Mohammadi T. High-salinity water desalination using VMD[J].Chemical Engineering Journal. 2009,149: 191–195
[13]王焕，秦英杰，刘立强，等. 多效膜蒸馏技术用于果汁浓缩[J].化学工业与工程，2012, 29(4):50-67
[14]秦英杰，刘立强，何菲. 内部热能回收式多效膜蒸馏用于海水淡化及浓盐水深度浓缩[J].膜科学与技术，2012, 32（2）:52-58
[15]张猛，高启君，文晨. 减压多效膜蒸馏过程试验研究[J].水处理技术，2012, 38(6):57-62
[16]吕双江，高启军，吕晓龙等. 减压分级式多效膜蒸馏过程的研究[J].天津工业大学学报，201, 32(2):1-6
[17]ZhaoK,HeinzlW,WenzelM,etal.Experimental study of the memsys vacuum-multi-effect-membrane-distillation (V-MEMD) module [J]. Desalination. 2013, 329:150-160
[18]Yao Kun, Qin Y，Yuan Y. A Continuous-Effect Membrane Distillation Process Based on Hollow Fiber AGMD Module with Internal Latent-Heat Recovery[J]. AIChE Journal, 2012, 59(4): 1278–1297
[19] Li Xiaojun, Qin Yingjie，Liu Rongling. Study on concentration of aqueous sulfuric acid solution by multiple-effect membrane distillation [J]. Desalination, 2012, 307(3): 34–41
[20]Liu Rongling, Qin Yingjie, Li Xiaojun. Concentrating aqueous hydrochloric acid by multiple-effect membrane distillation[J]. Front. Chem. Sci. Eng, 2012, 6(3): 311–321
[21] 杨兰，阎建民，马润宇. 膜蒸馏法浓缩乙二醛水溶液, 膜科学与技术[J].2004, 24(2):36–44

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