燃煤机组搪瓷板烟道的应用研究  

Study on Application of Enamel Flue Gas Ducts in Coal-Fired Unit

作　　者：张全斌 ZHANG Quanbin(Zhejiang Provincial Energy Group Company Ltd., Hangzhou 310007, China)

机构地区：[1]浙江省能源集团有限公司,浙江杭州310001

出　　处：《锅炉技术》2017年第5期7-11,28,共6页Boiler Technology

摘　　要：燃煤机组湿法脱硫系统运行环境恶劣,净烟气烟道腐蚀机理复杂。通过烟道腐蚀机理分析,硫酸露点腐蚀(低温腐蚀)是净烟道腐蚀破坏的主要原因。通过研究、比选,发现搪瓷板烟道能满足工程技术要求。从耐硫酸腐蚀能力、机械性能、抗振性能、防冲刷抗磨损能力以及工程造价等方面论证,搪瓷板烟道能有效解决低温腐蚀问题。与常规钢板喷涂玻璃鳞片烟道相比,搪瓷板烟道有优异的耐低温腐蚀、抗振、防冲刷抗磨损能力;有安全、环保、工厂化制作等施工优点;有电厂同等的设计寿命,可降低投资费用。经工程实践验证,搪瓷板烟道能够满足技术要求,具有重要的工程推广价值。The operating environment in wet desulphurization system of coal-fired units is bad and the corrosion mechanism of clean flue gas ducts is complex. By the analysis on corro- sive mechanism of clean flue gas ducts, the sulfuric acid dew point corrosion （low tempera- ture corrosion） is the main cause of corrosion damage of clean flue gas ducts. It is found that the enamel flue gas ducts can meet the engineering requirements through the research and comparison. From several aspects such as the corrosion resistance of sulfuric acid, mechanical properties of materials, vibration resistance, anti-erosion ＆ abrasion resistance and engineer- ing cost, the enamel flue gas ducts can solve the problem of low temperature corrosion. Com- pared with flue gas ducts coated with glass flake, the enamel flue gas ducts has excellent per- formance of low temperature corrosion resistance, vibration resistance, anti - erosion ＆ abra- sion resistance and the construction advantages such as safety, environmental protection factory production, and lower the investment cost with the same design life of power plant. It has been verified that enamel flue gas ducts can satisfy the technical specifications, and has important promotional value in engineering application.

关 键 词：超低排放 脱硫 烟道 搪瓷 硫酸露点 低温腐蚀 防腐 

分 类 号：TK224.9[动力工程及工程热物理—动力机械及工程]