气液两相流强化卷式纳滤膜分离硫酸镁水溶液

doi:10.3969/j.issn.0438-1157.2012.12.026

化工学报 ›› 2012, Vol. 63 ›› Issue (12): 3920-3926.DOI: 10.3969/j.issn.0438-1157.2012.12.026

气液两相流强化卷式纳滤膜分离硫酸镁水溶液

柳琦杰, 王枢, 郭竹洁, 谢成胜

西南交通大学生命科学与工程学院, 四川成都 610031

收稿日期:2012-04-25 修回日期:2012-07-11 出版日期:2012-12-05 发布日期:2012-07-20
通讯作者: 王枢
作者简介:柳琦杰(1988-),男,硕士研究生。
基金资助:
中央高校基本科研业务费专项资金项目(SWJTU11CX112);国家大学生创新创业训练计划项目(111061350)。

Enhancement of spiral nanofiltration membranes using gas sparging:application to MgSO₄ solution

LIU Qijie, WANG Shu, GUO Zhujie, XIE Chengsheng

School of Life Science and Engineering, Southwest Jiaotong University, Chengdu 610031, Sichuan, China

Received:2012-04-25 Revised:2012-07-11 Online:2012-12-05 Published:2012-07-20
Supported by:
supported by the Fundamental Research Funds for the Central Universities(SWJTU11CX112).

摘要/Abstract

摘要： 气液两相流强化卷式纳滤膜分离实验是针对DK2540卷式纳滤膜,采用气液两相流强化分离技术,对硫酸镁溶液进行研究,较系统地研究了温度、料液浓度、过膜压力、料液流速、气体流速等因素在分离硫酸镁溶液时,对膜通量、截留率和膜通量增加率的影响,并总结了气液两相流强化效果。结果表明,气液两相流强化卷式纳滤膜分离有明显的效果。温度宜在30~40℃。料液浓度越大、过膜压力越小、气液比越大,气液两相流强化效果越明显。

关键词: 卷式纳滤膜, 膜通量, 截留率, 气液比

Abstract: This study aims at the enhancement in nanofiltration process of aqueous solutions of inorganic salts and provides reference values for industrial application.Gas-sparged nanofiltration experiments with aqueous solution of MgSO₄ were performed using a DK2540F element spiral nanofilitration membrane module.The permeate flux and the enhancement from gas sparging were measured in the following operation ranges:temperature 28-36℃,feed concentration 20-50 g·L^-1,transmembrane pressure 0.4-0.7 MPa,air/liquid ratio 1.0-3.5,and air velocity 1.0-3.5 m·s^-1.The effects of different conditions on the permeate flux,rejection and increment rate of permeate flux of nanofiltration membrane were investigated.The experimental results show that gas sparging can significantly increase the permeate flux and rejection of MgSO₄ aqueous solution,appropriate temperature is between 30℃ and 40℃ and feed concentration,transmembrane pressure,and air/liquid have profound effects on the permeate flux and rejection rate of MgSO₄ aqueous solution,and the flux enhancement is more significant at higher feed concentration,lower transmembrane pressure,and higher air/liquid.

Key words: spiral nanofiltration membrane, permeate flux, rejection, air/liquid ratio

中图分类号:

TQ028.8

柳琦杰, 王枢, 郭竹洁, 谢成胜. 气液两相流强化卷式纳滤膜分离硫酸镁水溶液[J]. 化工学报, 2012, 63(12): 3920-3926.

LIU Qijie, WANG Shu, GUO Zhujie, XIE Chengsheng. Enhancement of spiral nanofiltration membranes using gas sparging:application to MgSO₄ solution[J]. CIESC Journal, 2012, 63(12): 3920-3926.

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气液两相流强化卷式纳滤膜分离硫酸镁水溶液

Enhancement of spiral nanofiltration membranes using gas sparging:application to MgSO₄ solution

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气液两相流强化卷式纳滤膜分离硫酸镁水溶液

Enhancement of spiral nanofiltration membranes using gas sparging:application to MgSO4 solution

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Enhancement of spiral nanofiltration membranes using gas sparging:application to MgSO₄ solution