湿法脱硫对电厂钢筋混凝土烟囱的腐蚀及防腐方法研究

Study on the Anticorrosive Methods for Reinforced Concrete Structure Chimney of Power Plant Caused by Wet Desulfurization

探讨了钢筋混凝土结构烟囱湿法脱硫后存在的腐蚀问题,以及因腐蚀所导致的混凝土结构的变化。防腐体系层除了具备基本的防腐蚀及抗渗性能外,还要考虑混凝土烟囱内部结构含有盐类介质。脱硫运行后,因漏水导致的对烟囱重新进行防腐维修,防腐体系与烟囱结构如何可靠黏结的问题,成为行业内的一个新课题。通过对目前国内常用的几种防腐方案优缺点的比较,分析了徳国固斯特烟囱防腐材料成功使用的机理及其特点和优势。

In this paper,the problem of corrosion in the reinforced concrete chimneys after being processed using wet desulfurization is discussed,and the changes within the structure of the concrete caused by acidic corrosion are analyzed.In addition to the basic anti-corrosion and impermeability,the anti-corrosion system must face the reality that the internal structure of the concrete chimneys contains salt.After desulfurization,there appears a new topic in the industry,i.e.how to keep reliably bonded of the anti-corrosion system and the chimney structure after the anti-corrosion maintenance of the chimney impaired by water leakage.Through comparison of the advantages and disadvantages of several anti-corrosion schemes commonly used in China,this paper analyzes the mechanism,characteristics,and advantages of anticorrosive systems successfully applied for chimneys provided by K?ster.