反电渗析处理海水淡化副产浓海水的研究

doi:10.19965/j.cnki.iwt.2021-0641

工业水处理 ›› 2022, Vol. 42 ›› Issue (3): 147-153. doi: 10.19965/j.cnki.iwt.2021-0641

反电渗析处理海水淡化副产浓海水的研究

崔玮哲^1,^2,³(),纪志永^1,^2,³(),TUMBA Kaniki^3,⁴,汪婧^1,^2,³,张忠德^3,⁵,袁俊生^1,^2,³

^1.河北工业大学化工学院/化工节能过程集成与资源利用国家?地方联合工程实验室, 天津 300130
^2.河北工业大学化工学院/海水资源高效利用化工技术教育部工程研究中心, 天津 300130
^3.河北省现代海洋化工技术协同创新中心, 天津 300130
^4.马古苏托理工大学化学工程系, 德班乌姆拉济 4031
^5.廊坊市亚德世环保设备有限公司, 河北廊坊 065099

收稿日期:2021-11-25 出版日期:2022-03-20 发布日期:2022-03-21
通讯作者: 纪志永 E-mail:15230183172@163.com;jizhiyong@hebut.edu.cn
作者简介:崔玮哲（1996— ），硕士研究生。电话：15230183172，E-mail：15230183172@163.com|纪志永，教授，博导。电话：13512289213，E-mail：jizhiyong@hebut.edu.cn。
基金资助:
河北省重点研发计划项目(19273401D);河北省自然科学基金项目(B2019202423);长江学者与创新团队计划项目(IRT14R14);河北省青年拔尖人才计划项目

Treatment concentrated seawater from seawater desalination by-product using reverse electrodialysis

Weizhe CUI^1,^2,³(),Zhiyong JI^1,^2,³(),Kaniki TUMBA^3,⁴,Jing WANG^1,^2,³,Zhongde ZHANG^3,⁵,Junsheng YUAN^1,^2,³

^1.National?Local Joint Engineering Laboratory of Chemical Energy Saving Process Integration and Resource Utilization，School of Chemical Engineering and Technology，Hebei University of Technology，Tianjin 300130，China
^2.Engineering Research Center of Seawater Utilization of Ministry of Education，School of Chemical Engineering and Technology，Hebei University of Technology，Tianjin 300130，China
^3.Hebei Collaborative Innovation Center of Modern Marine Chemical Technology，Tianjin 300130，China
^4.Department of Chemical Engineering，Mangosuthu University of Technology，Umlazi，Durban 4031，South Africa
^5.Langfang Yadeshi Environmental Protection Equipment Co. ，Ltd. ，Langfang 065099，China

Received:2021-11-25 Online:2022-03-20 Published:2022-03-21
Contact: Zhiyong JI E-mail:15230183172@163.com;jizhiyong@hebut.edu.cn

摘要/Abstract

摘要：

海水淡化副产浓海水的排放会对海洋生态环境产生不利影响乃至破坏，但其与河水间存在的盐差能可被利用，是一种可再生能源。反电渗析是可以有效将盐差能转化为电能的新型绿色发电技术。以浓海水和河水分别作为反电渗析的浓、淡室进料溶液，基于国产亚德世膜，采用不同的隔板考察了膜间距离和流道类型对反电渗析性能的影响，并用进口富士膜进行了实验对比。结果表明：随着膜间距离的增大，膜堆开路电压和内阻增大，功率密度和离子迁移量减小；相同膜间距离下，直流道隔板的产电性能优于斜流道；采用富士膜的产电性能和离子迁移量影响规律与亚德世膜一致。综合考虑开路电压、功率密度和离子迁移量，选用0.85 mm的直流道隔板较优，功率密度为0.363 2 W/m²。该研究为浓海水的科学利用提供了参考借鉴。

关键词: 浓海水, 反电渗析, 膜间距离, 流道类型, 功率密度

Abstract:

The discharge of the by-product concentrated seawater after desalination has adversely affect on the marine ecological environment and even destroy it. But the salinity gradient energy between the by-product concentrated seawater and the river water can be used，which is a renewable energy source. Reverse electrodialysis is a new green power generation technology that can effectively convert salinity gradient energy into electric energy. Taking concentrated seawater and river water as the feed solution of the high concentration compartment and low concentration compartment in reverse electrodialysis， different separators were used under the Yadeshi membranes to investigate the influence of the distance between membranes and the type of flow channel on the electricity generation of reverse electrodialysis，and the Fuji membranes were used for experimental comparison. The results showed that with the increase of the distance between the membranes，the open circuit voltage and the internal resistance of the membrane stack increased，the power density and ion transport decreased. When the distance between the membranes was the same，the electricity generation performance under the straight channel was better than the oblique； when Fuji membranes were used，the result of generation performance and ionic transport was the same as that of Yadeshi. Considering the open circuit voltage，power density，and ion transport performance，it was better to choose the 0.85 mm straight channel，and the power density was 0.363 2 W/m². This research provides a reference for the scientific utilization of concentrated seawater.

Key words: concentrated seawater, reverse electrodialysis, distance between membranes, flow channel type, power density

中图分类号:

X703

崔玮哲,纪志永,TUMBA Kaniki,汪婧,张忠德,袁俊生. 反电渗析处理海水淡化副产浓海水的研究[J]. 工业水处理, 2022, 42(3): 147-153.

Weizhe CUI,Zhiyong JI,Kaniki TUMBA,Jing WANG,Zhongde ZHANG,Junsheng YUAN. Treatment concentrated seawater from seawater desalination by-product using reverse electrodialysis[J]. Industrial Water Treatment, 2022, 42(3): 147-153.

https://www.iwt.cn/CN/Y2022/V42/I3/147

图/表 8

图1 隔板示意
（a）直流道（b）斜流道

Fig. 1 Schematic diagram of flow channel

表1 离子交换膜参数

Table 1 Parameters of ion exchange membrane

名称	YDS膜（均相膜）		FJ膜（均相膜）
型号	CEM	AEM	CEM	AEM
膜厚/μm	150~180	150~180	160	160
选择透过性/%	>98	>98	>96	>95
膜面电阻/（Ω·cm²）	6.34	1.68	6.10	3.50

图2 反电渗析膜堆结构

Fig. 2 Internal structure of RED membrane stack

图3 直流道中不同膜间距离的影响

Fig. 3 The influence of the distance between membranes in the straight channel

图4 斜流道中不同膜间距离的影响

Fig.4 The influence of the distance between membranes in the oblique channel

图5 直流道与斜流道的RED性能对比

Fig.5 RED performance comparison between straight and oblique channel

表2 采用富士膜直流道下的RED性能

Table 2 RED performance in the straight channel with Fuji membranes

膜间距离/mm	0.75	0.85	1.10
开路电压/V	1.351 8	1.358 5	1.382 7
膜堆内阻/Ω	6.335 9	6.464 7	7.762 3
最大功率密度/（W·m^-2）	0.378 7	0.374 8	0.323 4
离子迁移量/（mg·L^-1）	724.16	616.55	473.54

表3 采用富士膜斜流道下的RED性能

Table 3 RED performance in the oblique channel with Fuji membranes

膜间距离/mm	0.85	0.95	1.10
开路电压/V	1.382 0	1.383 9	1.384 6
膜堆内阻/Ω	7.680 3	7.748 1	8.522 3
最大功率密度/（W·m^-2）	0.326 5	0.324 9	0.295 1
离子迁移量/（mg·L^-1）	602.48	548.45	462.19

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