T30-1反应塔体破坏分析及防护措施

Analysis of Rupture Occurred in T30-1 Reaction Tower and Protecting Methods

经分析,T30-1反应塔没有采取任何防止产生应力腐蚀措施,且主体材质使用温度在敏化区域内,由于设计主体材质选择不当,且无进行稳定化热处理和消除应力热处理,空塔时没有充装惰性气体进行气封,停车检修时塔内没有进行化学清洗,致使塔内壁上的硫化铁可继续与空气中的氧和水份作用,生成连多硫酸,不断腐蚀着塔内壁,结果造成塔顶空塔部分的封头与塔体间焊缝热影响区内裂纹的产生,致使塔体破坏。最后对反应塔提出了应力腐蚀防护措施。

Owing to misuse of material and inappropriate manufacture and operating processes, various problems may happen in austenitic equipment because of stress corrosion and inter angular corrosion, all of which will influence production and profit. In this article, with a praetical example, the problems in this respect were discussed in detail,