摘要
塔顶注水作为常减压蒸馏装置“一脱三注”防腐措施的重要一环,已在大部分炼油厂得到推广和应用,并在实践中总结提升,取得良好效果。由于塔顶注水不仅可以改变露点温度,提高露点区域的pH以缓解露点腐蚀,还可以减少系统中的盐及垢物沉积,从而减少垢下腐蚀。为了保证注水的最佳效果,需要考虑多方面因素,主要包括注水水质、注水点的选择、注水量的优化等。对优化注水相关因素逐一分析,结合工业实践经验给出最佳指导意见。实际案例分享表明,通过优化注水来源、动态调整注水量、改变注水点等措施,能产生明显的经济效益并改善防腐效果,减少安全隐患。
Overhead water injection,as an important part of the anti-corrosion measures“one removal and three injections”for crude atmospheric and vacuum distillation units,has been promoted and applied in most refineries,and has been summarized and improved in practice,achieving good results.Due to the fact that water injection at the tower overhead can not only change the dew point temperature and increase the stream pH around dew point temperature to alleviate dew point corrosion,but also reduce salt and scale deposition in the system,thereby reducing under-deposit corrosion.In order to ensure the optimal effect of water injection,multiple factors need to be considered,mainly including water quality,injection position,injection volume,etc.Based on analyzing of the factors related to optimizing water injection,combining the industrial practical experience,the best guidance were proposed.Practical case results show that the measures such as optimizing water quality,dynamically adjusting injection volume,and selecting proper injection positions can bring significant economic benefits,improve anti-corrosion effects,and reduce safety hazards.
作者
廖芝文
Liao Zhiwen(Nalco(China)Environmental Solutions Co.,Ltd.,Shanghai 200062)
出处
《石油炼制与化工》
CAS
CSCD
北大核心
2023年第12期32-38,共7页
Petroleum Processing and Petrochemicals
