水流-气泡驱动下电化学反应器的水软化机制和性能  

Mechanism and performance of water softening in water flow-bubble coupling-driven electrochemical reactor

作　　者：李松洁 毛伟 康文达 许纪元 于洪涛[1] LI Songjie;MAO Wei;KANG Wenda;XU Jiyuan;YU Hongtao(School of Environment,Key Laboratory of Industrial Ecology and Environmental Engineering,Dalian University of Technology,Dalian 116024,China;Dow Chemical(Zhangjiagang)Co.Ltd.,Suzhou 215635,China)

机构地区：[1]大连理工大学环境学院,工业生态与环境工程教育部重点实验室,大连116024 [2]陶氏化学(张家港)有限公司,苏州215635

出　　处：《环境工程学报》2025年第3期709-716,共8页Chinese Journal of Environmental Engineering

基　　金：国家自然科学基金区域创新发展联合基金重点项目(U22A20241)。

摘　　要：电化学软化是一种有效的循环冷却水处理技术,由于水垢的成核和生长依赖于阴极表面,因此硬度去除效率受到阴极面积的限制。本研究展示了一种具有实用性的反应器,通过水流和气泡运动促进OH^(−)扩散,实现垢晶在液相均相成核,不再依赖阴极表面。结果表明,通过pH的监控,阴极室内pH在10 min内快速达到了9.0,并在100 min时稳定在10.5,表明OH^(−)扩散到液相并积累。阴极室相对于阳极室明显浑浊,证明了均相成核。XRD结果及SEM电镜图证实均相成核产生沉淀为方解石碳酸钙。该反应器处理能力为100 L·h^(−1),水软化效率达到了199.5 g·(h·m^(2))^(−1),出水硬度满足循环冷却水系统补充水指标。该反应器设计具备实际应用价值,可用于工业冷却水系统的软化处理。Electrochemical softening is an effective circulating cooling water treatment technology,due to the dependence of the nucleation and growth of scale on the cathode surface,its hardness removal efficiency is limited by its area.A practical reactor was presented in this study that can promote OH^(−)diffusion through solution regulation and bubble movement,and enable the homogeneous nucleation of scale crystals in the liquid phase without reliance on the cathode surface.The results showed that in cathode chamber,pH quickly reached 9.0 within 10 minutes and stabilized at 10.5 at 100th minute,indicating OH^(−)diffusion and accumulation in the liquid phase.In addition,significant turbidity appeared in the cathode chamber compared to the anode chamber,demonstrating the occurrence of homogeneous nucleation.The XRD results and SEM images confirmed that produced precipitates of homogeneous nucleation was calcite calcium carbonate.The reactor has a processing capacity of 100 L·h^(−1),and the water softening efficiency reached 199.5 g·(h·m^(2))^(−1).And the effluent hardness could meet the water quality indicators for supplementary water in the circulating cooling water system.The design of this reactor has a practical application value and can be used in softening treatment of industrial cooling water systems.

关 键 词：电化学 循环冷却水 软化 均相成核 反应器 

分 类 号：X703[环境科学与工程—环境工程]