氯元素对高炉煤气管道的腐蚀与预防

Corrosion and prevention of chlorine element on blast furnace gas pipeline

氯化氢气体对高炉煤气管道的腐蚀成为影响大中型高炉正常生产的关键因素。通过建立氯平衡,定量分析了高炉中氯元素的收入和支出方式,发现受干熄焦氯元素含量不稳定的影响,高炉氯元素主要来源存在很大差异。企业应提高对氯元素腐蚀危害的重视程度,尽早建立相关标准,将入炉料氯负荷控制在0.4kg/t之内。对不同预防措施的对比分析表明,喷碱中和装置是目前最为切实可行的预防氯元素对高炉煤气管道腐蚀的措施。本文探讨了利用数学模型实现氯元素精准控制,以及开发智能控制系统实现煤气冷凝水实时排放等新技术的可行性和应用前景,以期为大中型高炉实现氯元素科学管控,降低氯元素对煤气管道的腐蚀提供参考。

The corrosion of hydrogen chloride gas to blast furnace gas pipelines has become a key factor affecting the normal production of large and medium-sized blast furnaces.By establishing the chlorine balance,the income and expenditure patterns of the blast furnace chlorine element are quantitatively analyzed,it is found that the main sources of chlorine element in blast furnace are quite different due to the impact of the unstable chlorine element content in dry quenched coke.Enterprises should increase the degree of attention to the corrosion harm of chlorine element,establish relevant standards as soon as possible,and control the chlorine load into the furnace to within 0.4kg/t.The comparative analysis of different preventive measures shows that the alkali injection neutralization device is the most practical measure to prevent the corrosion of chlorine element for the blast furnace gas pipeline.This paper discusses the feasibility and prospect of new technologies application of using mathematical model to achieve the precise control of chlorine elements and developing intelligent control system to realize real-time discharge of gas condensing water etc.To expect which provides a reference for large and medium-sized blast furnaces to achieve scientific control of chlorine elements and minimize the corrosion of chlorine elements to gas pipelines.