双极膜电渗析处理煤化工反渗透浓盐水制酸碱试验研究

许碧涛; 王旭东; 杨逸飞; 陈嘉恒; 薛艺纯; 王瑞泽

doi:10.13205/j.hjgc.202504017

双极膜电渗析处理煤化工反渗透浓盐水制酸碱试验研究

doi: 10.13205/j.hjgc.202504017

西安建筑科技大学环境与市政工程学院陕西省膜分离重点实验室,西安 710055

基金项目:

陕西省教育厅服务地方专项（22JC041）；陕西省重点科技创新团队计划项目（2024RS-CXTD-51）

详细信息

作者简介:
许碧涛（1999—），男，硕士研究生，主要研究方向为双极膜电渗析技术。zmsxbt@163.com

通讯作者:
王旭东（1979—），男，教授，主要研究方向为膜分离技术。xudongw7904@126.com

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- PDF下载量: 4
- 被引次数: 0
出版历程
- 收稿日期: 2024-01-26
- 录用日期: 2024-05-12
- 修回日期: 2024-03-21
- 刊出日期: 2025-04-01

Experimental study on bipolar membrane electrodialysis treatment of reverse osmosis brine for acid and alkali production in coal chemical industry

Key Laboratory of Membrane Separation in Shaanxi Province, School of Environmental and Municipal Engineering, Xi'an University of Architecture and Technology, Xi'an 710055, China

摘要

摘要: 煤化工废水的处理成为制约企业发展的关键点。当前主要采用的“纳滤+反渗透”的双膜法虽然能有效分离废水中的有机物和无机盐，但难以处理产生的反渗透浓缩液。针对双膜法处理煤化工废水产生的反渗透浓缩液进行双极膜电渗析试验，探究了工艺条件操作电压、膜面流速、V_{产品初始液}∶V_原料液对产酸碱浓度、速率、单位能耗和电流效率的影响。结果表明：在操作电压为24 V，膜面流速为3.540 cm/s，V_{产品初始液}∶V_原料液为5∶5的条件下试验结果最优。该研究可为煤化工反渗透浓缩液处理领域提供技术参考。
- 双极膜电渗析 /
- 煤化工 /
- 反渗透浓水 /
- 零排放
Abstract: The treatment of coal chemical wastewater has become a significant challenge， restricting the development of coal chemical enterprises. While the dual-membrane process of "nanofiltration + reverse osmosis" is commonly employed for separating organic substances and inorganic salts in wastewater， it's insufficient in treating the reverse osmosis brine generated during this process. This study focused on exploring a more efficient method to treat the reverse osmosis brine， specifically through bipolar membrane electrodialysis （BMED）， with the aim of recovering valuable acids and bases while improving the overall treatment efficiency. This research systematically examined the impact of various operational parameters on the performance of the BMED， including membrane stack voltage， membrane surface flow rate， product-to-raw material volume ratio， and current efficiency. The results revealed that the optimal performance was achieved when the membrane stack voltage was set at 24 V， the membrane surface flow rate was 3.540 cm/s， and the product-to-raw material volume ratio was maintained at 5：5. These findings provide valuable insights into the treatment of coal chemical wastewater， specifically in terms of enhancing the recovery of valuable chemicals from reverse osmosis brine. This research could serve as a sound reference for improving the efficiency of coal chemical wastewater treatment processes and mitigating the challenges associated with brine disposal.
- bipolar membrane electrodialysis /
- coal chemical industry /
- reverse osmosis brine /
- zero discharge

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1 三室BMED膜堆工作原理

1. Working diagram of three-chamber BMED membrane stack

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2 BMED试验流程

2. Flow chart of BMED experiment

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3 操作电压对BMED工艺性能的影响

3. Effect of operating voltage on BMED process performance

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4 不同电压下膜堆电流效率和能耗

4. Current efficiency and energy consumption of membrane stacks under different voltages

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5 膜面流速对BMED工艺性能的影响

5. Effect of membrane surface flow rate on BMED process performance

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6 不同膜面流速下膜堆电流效率和能耗

6. Current efficiency and energy consumption of membrane stacks under different flow rates

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7 产品与原料体积比对BMED工艺性能的影响

7. Effect of product-to-raw material volume ratio on BMED process performance

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8 不同产品与原料体积比下膜堆电流效率和能耗

8. Current efficiency and energy consumption of membrane stacks under different product-to-raw material volume ratios

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1 模拟煤化工反渗透浓盐水水质

1. Simulated water quality of reverse osmosis brine in coal chemical industry

电导率/(mS/cm)	pH	ρ(Na⁺)/（mg/L）	ρ(K⁺)/（mg/L）	ρ(Cl^-)/（mg/L）	ρ(SO42-)/（mg/L）	ρ(NO3-)/（mg/L）	ρ(Ca²⁺)/（mg/L）	ρ(Mg²⁺)/（mg/L）
32.4	7.03	21620	936	25878.5	11520	1488	12	28

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2 试验所用膜材料

2. Membrane materials used in the experiment

名称	型号	特性	厚度/mm	含水率/%	交换容量/(mol/kg)
均相阳膜	TRJCM-II	耐酸碱、高截留、均相	0.2~0.35	30~40	1.8~3.0
均相阴膜	TRJAM-II	耐酸碱、高截留、均相	0.16~0.25	20~30	0.5~2.5
双极膜	TRJBM-I	耐酸碱	0.14~0.25	33~40	阳面:0.7~1.8；阴面:0.2~1.0

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