碱熔锅腐蚀原因分析及预防措施研究

Corrosion failure analysis of caustic-fusion pan and research of preventive measures

对某化工厂间苯二酚装置的碱熔锅腐蚀情况及锅内沉积物进行检验分析,并通过建立模拟装置进行模拟试验,研究结果表明碱熔锅严重腐蚀主要是由于高温、高浓度碱液的冲刷造成的。从理论上分析了碱熔锅腐蚀的原因,讨论了从操作工艺改进、碱熔锅结构改造、确保碱熔锅制造质量和选择耐冲刷腐蚀材料4个方面来增加碱熔锅的使用寿命。

The corrosion and deposit in caustic-fusion pans of resorcinol equipment in a chemical factory was analyzed and the experiment was simulated through the equipment. The result proved that the caustic-fusion pan was corrupted seriously because of the erosion of lye in high temperature and concentration. Furthermore, the reason of caustic-fusion pans corrosion was analyzed from theory. At the same time, the following a few methods were discussed for increasing the life of caustic-fusion pans, which include ameliorating operational techniques, rebuilding the frame of caustic-fusion pans and selecting corrosion-resistant and erosion-proof materials.