FCC余热锅炉低温省煤器腐蚀原因分析  

Corrosion Cause Analysis of Low Temperature Economizer of HRSG in FCC

作　　者：赵耀[1] 张宝忠 Zhao Yao;Zhang Baozhong(SINOPEC Tianjin Refining&Chemical Company,Tianjin,300271)

机构地区：[1]中国石化天津分公司研究院,天津300271

出　　处：《安全、健康和环境》2020年第8期6-9,共4页Safety Health & Environment

摘　　要：对某催化裂化余热锅炉低温省煤器腐蚀泄漏情况进行详细分析,结果表明低温省煤器炉管弯头泄漏失效的主要原因是烟气侧的硫酸露点腐蚀,垢下腐蚀起到辅助作用;腐蚀尚未对钢材的金相组织造成损伤,钢材的结构产生破坏。建议通过炉墙上挡板开孔避免形成烟气死区、提高进水温度等减少余热锅炉低温省煤器腐蚀泄漏的发生。The corrosion leakage of low-temperature economizer of a catalytic cracking waste heat boiler was analyzed in detail.The results showed that the main reason for the leakage failure was the sulfuric acid dew point corrosion on the flue gas side.The corrosion under the scale played an auxiliary role.The corrosion hadn′t qualitatively affect the metallographic structure of the steel material.It was suggested to reduce the corrosion leakage by properly opening the baffle on the furnace wall to avoid the formation of flue gas dead zone and increasing the inlet water temperature.

关 键 词：余热锅炉 低温省煤器 露点腐蚀 金相组织 原因分析 

分 类 号：TQ050.9[化学工程]