Abstract:

Some water treatment methods which are usually used in Thermal Power Plant such as soften treatmenu adding acid and water-treatment agent or weak acid canon exchange and water treatment agent treatment are introduced. The advantages and disadvantages of these methods are analysed. The problems about scaling, copper corrosion and mild steel corrosion in circulating water system with high hardness and high alkalinity are expounded. The main formations of copper corrosion such as brass's dezinc corrosion and electric couple corrosion are intraduced,and the main causes leading to copper corrosion such as the effect of high salt content,Cl^- and the 1uminous corrosion caused by scaling agent are analysed, then the corresponding settling measures are brought up.

Key words: circulating water system, condenser brass pipe, scaling, corrosion

摘要：

介绍了目前国内火电厂循环水系统常用的软化处理法、加酸+水质稳定剂处理、弱酸阳离子交换+水质稳定剂联合处理等几种水处理方法，分析了各种方法的优缺点。阐述了高硬度、高碱度循环水系统存在的结垢问题、铜腐蚀问题和碳钢腐蚀问题。介绍了铜腐蚀的主要形态如黄铜脱锌腐蚀、电偶腐蚀等，分析了引起铜腐蚀的主要原因如高含盐量的影响、Cl^-的影响以及由阻垢剂本身引起的光亮腐蚀，最后针对存在的结垢和腐蚀问题提出了相应的解决措施。

关键词: 循环水, 凝汽器铜管, 结垢, 腐蚀

CLC Number: 

• TQ085

• TM621.8