面向碳捕集系统的电渗析再生装置膜污染处理与流程优化

面向碳捕集系统的电渗析再生装置膜污染处理与流程优化

刘永平¹，付耀²，赵光深¹，宋佳慧³，刘洪波¹，贺晓利¹，黄艳¹，王勤辉³，方梦祥^2，3*

1.国能锦界能源有限责任公司，陕西省榆林市 719319；2.浙江大学青山湖能源研究基地，浙江省杭州市 311300；3.浙江大学能源工程学院，浙江省杭州市 310027

基金资助:
国家重点研发计划项目(2024YFB4106100)；浙江省尖兵计划项目(2025C01158)；中央高校基本科研业务费专项资金资助项目(226-2025-00076, 2022ZFJH004)

Membrane Fouling Treatment and Process Optimization of Electrodialysis Regeneration Units for Carbon Capture Systems

LIU Yongping¹, FU Yao², ZHAO Guangshen¹, SONG Jiahui³, LIU Hongbo¹, HE Xiaoli¹, HUANG Yan¹, WANG Qinhui³, FANG Mengxiang^2,3*

1.CHN Energy Jinjie Energy Co., Ltd., Yulin 719319, Shaanxi Province, China; 2.Qingshanhu Energy Research Center, Zhejiang University, Hangzhou 311300, Zhejiang Province, China; 3.College of Energy Engineering, Zhejiang University, Hangzhou 310027, Zhejiang Province, China

Supported by:
National Key R&D Program of China (2024YFB4106100); Pioneer R&D Program of Zhejiang Province (2025C01158); The Fundamental Research Funds for the Central Universities (226-2025-00076, 2022ZFJH004).

摘要/Abstract

摘要： 【目的】针对化学吸收碳捕集系统中吸收剂电渗析再生装置在运行时离子交换膜易发生污染和堵塞的问题，研究了运行条件及处理手段，以优化运行流程并延长离子交换膜的使用寿命。【方法】在膜污染测试装置中，利用实际工程运行的降解吸收剂样品，在不同条件下对膜进行浸泡测试，验证了化学洗涤法和反向电流冲洗法对污染膜的清洗效果，并比较了活性炭、分子筛、硅胶等不同处理手段对特征金属离子的去除效果。【结果】离子交换膜表面会随浸泡时长发生不同程度的污堵；浸泡温度高于40 ℃会显著加剧污染，达到60 ℃就会导致阳离子交换膜龟裂；化学洗涤法可恢复膜表面状态，其操作便捷性优于反向电流冲洗法；高精度活性炭对铁离子的去除率大于50%，分子筛与硅胶去除效果有限。基于实验结果，提出了集成过滤、除盐、配药单元的电渗析再生工业装置方案：过滤单元采用活性炭吸附与换热器协同，降温至40 ℃以下并拦截污染物，配药单元支持在线化学清洗。【结论】流程优化后的工业方案可降低膜污染风险并延长膜寿命，有利于电渗析技术在碳捕集工程的规模化应用。

关键词: 碳捕集, 离子交换膜, 电渗析, 净化回收, 化学吸收, 吸收剂, 流程优化

Abstract: [Objectives]　To address the issues of fouling and clogging of ion exchange membranes during the operation of absorbent electrodialysis regeneration units in chemical absorption carbon capture systems, operating conditions and treatment strategies are investigated to optimize the operation process and extend the service life of the ion exchange membranes. [Methods]　In the membrane fouling test device, degraded absorbent samples obtained from actual engineering operations are utilized to conduct soaking tests on membranes under different conditions. The cleaning effectiveness of the chemical cleaning method and the reverse current flushing method on the fouled membranes are verified, and the removal performance of different treatment methods, including activated carbon, molecular sieves, and silica gel, on characteristic metal ions are compared. [Results]　The surface of ion exchange membranes exhibits different degrees of fouling with immersion time. An immersion temperature higher than 40 ℃ significantly aggravates fouling, and at 60 ℃ it can cause cracking in cation exchange membranes. The chemical cleaning method can restore the membrane surface condition, and its operational convenience is superior to that of the reverse current flushing method. The removal rate of iron ions by high-precision activated carbon exceeds 50%, while molecular sieves and silica gel show limited removal performance. Based on the experimental results, an industrial electrodialysis regeneration unit scheme integrating filtration, desalination, and chemical dosing units is proposed. The filtration unit combines activated carbon adsorption with a heat exchanger to reduce the temperature to below 40 ℃ and intercept contaminants, and the chemical dosing unit enables in-line chemical cleaning. [Conclusions]　The optimized industrial scheme can reduce the risk of membrane fouling and extend membrane service life, thereby facilitating the large-scale application of electrodialysis technology in carbon capture engineering.

Key words: carbon capture, ion exchange membrane, electrodialysis, purification and recovery, chemical absorption, absorbent, process optimization

刘永平, 付耀, 赵光深, 宋佳慧, 刘洪波, 贺晓利, 黄艳, 王勤辉, 方梦祥. 面向碳捕集系统的电渗析再生装置膜污染处理与流程优化[J]. 发电技术.

LIU Yongping, FU Yao, ZHAO Guangshen, SONG Jiahui, LIU Hongbo, HE Xiaoli, HUANG Yan, WANG Qinhui, FANG Mengxiang. Membrane Fouling Treatment and Process Optimization of Electrodialysis Regeneration Units for Carbon Capture Systems[J]. Power Generation Technology.

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