结晶
联轴节(管道)
电化学
膜
过程(计算)
分离(统计)
膜技术
分离过程
化学
色谱法
化学工程
材料科学
计算机科学
工程类
电极
有机化学
冶金
物理化学
生物化学
机器学习
操作系统
作者
Jie Zhou,Yuexin Chang,Duowen Yang,Yang Liu,Bo Jiang,Wei Yan,Hao Xu,Xing Xu
出处
期刊:Water Research
[Elsevier]
日期:2024-06-01
卷期号:256: 121617-121617
被引量:1
标识
DOI:10.1016/j.watres.2024.121617
摘要
The traditional electrochemical descaling process exhibits drawbacks, including low OH− utilization efficiency, constrained cathode deposition area, and protracted homogeneous precipitation time. Consequently, this study introduces a novel membrane-free electrochemical separation-filtering crystallization (MFES-FC) coupling process to treat circulating cooling water (CCW). In the membrane-free electrochemical separation (MFES) system, OH− is rapidly extracted by pump suction from the porous cathode boundary layer solution, preventing neutralization with H+, thereby enhancing the removal of Ca2+ and Mg2+. Experimental results indicate that the pH of the pump suction water can swiftly increase from 8.13 to 11.42 within 10 min. Owing to the high supersaturation of the pump suction water, this study couples the MFES with a filtration crystallization (FC) system that employs activated carbon as the medium. This approach captures scale particles to enhance water quality and expedites the homogeneous precipitation of hardness ions, shortening the treatment time while further augmenting the removal rate. After the MFES-FC treatment, the single-pass removal rates for total hardness, Ca2+ hardness, Mg2+ hardness, and alkalinity in the effluent reached 92%, 97%, 64%, and 67%, respectively, with turbidity of 3 NTU, current efficiency of 86.6%, and energy consumption of 7.19 kWh·kg−1 CaCO3. This coupling process facilitates an effective removal of hardness and alkalinity at a comparatively low cost, offering a new reference and inspiration for advancements in electrochemical descaling technology.
科研通智能强力驱动
Strongly Powered by AbleSci AI