|本期目录/Table of Contents|

[1]马宇,杨刚,邢卫红.圆盘式膜组件中浓差极化现象研究[J].南京工业大学学报(自然科学版),2016,38(06):86-92.[doi:10.3969/j.issn.1671-7627.2016.06.015]
 MA Yu,YANG Gang,XING Weihong.Study of concentration polarization in disc-type membrane module[J].Journal of NANJING TECH UNIVERSITY(NATURAL SCIENCE EDITION),2016,38(06):86-92.[doi:10.3969/j.issn.1671-7627.2016.06.015]
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圆盘式膜组件中浓差极化现象研究()
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《南京工业大学学报(自然科学版)》[ISSN:1671-7627/CN:32-1670/N]

卷:
38
期数:
2016年06期
页码:
86-92
栏目:
出版日期:
2016-11-15

文章信息/Info

Title:
Study of concentration polarization in disc-type membrane module
文章编号:
1671-7627(2016)06-0086-07
作者:
马宇杨刚邢卫红
南京工业大学 材料化学工程国家重点实验室,江苏 南京 210009
Author(s):
MA YuYANG GangXING Weihong
State Key Lab of Materials-Oriented Chemical Engineering,Nanjing Tech University,Nanjing 210009,China
关键词:
纳滤 CFD模拟 圆盘式膜组件
Keywords:
nanofiltration CFD simulation disc-type membrane module
分类号:
TQ028.8
DOI:
10.3969/j.issn.1671-7627.2016.06.015
文献标志码:
A
摘要:
采用圆盘式膜组件,使用DK纳滤膜对KCl溶液进行纳滤截留实验,并通过计算流体动力学(CFD)模拟、VVM数学方法以及道南-筛分-介电孔(DSPM-DE)模型对实验结果进行拟合与分析。结果表明:通过CFD模拟,KCl真实截留率要明显高于表观截留率,且跨膜压差对膜面切向流速的影响可忽略不计,因此VVM直接适用于圆盘式膜组件中浓差极化现象的模拟; 主体溶液浓度、通量及膜面切向流速的变化会对浓差极化产生影响,通过DSPM-DE模型拟合发现,膜内荷电密度(Xd)随主体溶液浓度的变化有较大变化; 在通量及膜面流速不变的条件下,浓差极化层厚度不变,体系中溶质浓度的升高会增强浓差极化现象。
Abstract:
Disk-type membrane module and DK membrane were used to characterize the retention of KCl solution.Computational fluid dynamics(CFD)simulation,velocity variation method(VVM),and Donnan steric pore & dielectrical exclusion(DSPM-DE)model were used to fit and analyze experimental results.Results showed that the real retention of KCl was obviously higher than the observed one. transmembrane pressure feeble effected tangential velocity in disc-type membrane module,so VVM could be directly used to simulate the phenomenon of concentration polarization(CP).The deviation between real and observed retention are mainly effected by solute concentration,permeate volume flux and tangential velocity on the membrane.Fitting results from DSPM-DE model showed that the change of Xd was followed by solute concentration,permeate volume flux variation.Under the situation of unchanged tangential and permeate volume flux,solute concentration increase would enhance the phenomenon of CP,but the CP layer remained the same.

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备注/Memo

备注/Memo:
收稿日期:2015-04-28
基金项目:国家科技支撑计划(2013BAE11B03)
作者简介:马宇(1989—),男,江苏徐州人,硕士生,主要研究方向为膜分离; 杨刚(联系人),教授,E-mail:yanggang@njtech.edu.cn.
引用本文:马宇,杨刚,邢卫红.圆盘式膜组件中浓差极化现象研究[J].南京工业大学学报(自然科学版),2016,38(6):86-92..
更新日期/Last Update: 2016-12-20