火力发电厂脱硝热解炉泄漏原因分析  

Cause for Leaking of Denitration Pyrolyzation Furnace of Heat Power Plant

作　　者：王严 WANG Yan(China Datang Corporation Science and Technology General Research Institute Co.,Ltd.,East China Electric Power Test&Research Institute,Hefei 230088,Anhui China)

机构地区：[1]中国大唐集团科学技术研究总院有限公司华东电力试验研究院,安徽合肥230088

出　　处：《热处理》2024年第4期52-54,共3页Heat Treatment

摘　　要：某火力发电厂脱硝热解炉管发生严重泄漏。对泄漏的热解炉管进行了宏观检查、金相检验、硬度检验,以揭示其泄漏的原因。结果表明:由于热解炉入口温度偏低,尿素分解不完全从而附着于管内壁,使管壁发生沿晶腐蚀而开裂,导致热解炉泄漏。Pipe in denitration pyrolyzation furnace exhibited severe leakage in a heat power plant.The leaking pipe in pyrolyzation furnace was subjected to micro-check,metallographic examination and hardness measurements to discover the cause of its leakage.The results indicated that thepartially decomposed urea adhered to the inner wall of pipe because the temperature at inlet of the pyrolyzation furnace was on the lower side,and,as a result,the pipe wall developed itercrystalline corrosion thereby cracked,resulting in leakage of pyrolyzation furnace。

关 键 词：脱硝热解炉 TP304H钢 腐蚀 泄漏 

分 类 号：TG142.1[一般工业技术—材料科学与工程]