摘要：

循环冷却水系统普遍存在结垢、腐蚀、微生物滋生、浓缩倍率低以及排污和补充水量大的问题，为解决上述问题，针对某焦化企业循环冷却水系统开展了电化学技术的工程化应用研究，分析了电化学处理器除垢、阻垢、缓蚀和杀菌效果，研究了极板垢样微观形态和物相，并对电化学水处理技术的经济效益进行了核算。结果表明，电化学水处理技术在循环冷却水系统的除垢和防垢方面取得良好效果，且有效控制了腐蚀和微生物滋生情况，电化学设备投运后换热管平均污垢热阻低至约1.08×10^-4 m²·K/W，碳钢挂片平均腐蚀速率仅0.013 mm/a，异养菌数维持在1.6×10⁴ mL^-1的较低水平。此外，技术应用后节药、节水及减排效益突出，具有广阔的应用前景。

关键词: 循环冷却水, 电化学技术, 水质稳定技术, 工程化应用

Abstract:

The circulating cooling water systems commonly face issues such as scaling, corrosion, microbial proliferation, low concentration ratio, and high water consumption for blowdown and makeup. To address these problems, an engineering application study of electrochemical technology was conducted for a circulating cooling water system in the coking enterprise. The scaling removal, scale inhibition, corrosion inhibition, and bactericidal effects of electrochemical processors were analyzed, the microscopic morphology and phases of scale samples on electrodes were examined, and the economic benefits of electrochemical water treatment technology were evaluated. The results demonstrated that electrochemical water treatment technology effectively removed and prevented scaling in circulating cooling water systems, while also controlling corrosion and microbial growth. After the implementation of electrochemical equipment, the average fouling thermal resistance of heat exchange tubes was reduced to approximately 1.08×10^-4 m²·K/W, the average corrosion rate of carbon steel coupons was only 0.013 mm/a, and the heterotrophic bacterial count remained at a low level of 1.6×10⁴ mL^-1. Additionally, the application of this technology achieved significant savings in chemicals, water, and emissions, indicating broad application potential.

Key words: circulating cooling water, electrochemical technology, water quality stabilization technology, engineering application

中图分类号: 

• X703