裂解炉对流段炉管泄漏原因分析及优化措施  

CAUSE ANALYSIS AND OPTIMIZATION MEASURES FOR LEAKAGE OF FURNACE TUBE IN CONVECTION SECTION OF CRACKING FURNACE

作　　者：王强[1] 张乐[1] 李怀强 马国民 张勇[1] Wang Qiang;Zhang Le;Li Huaiqiang;Ma Guomin;Zhang Yong(PetroChina Dushanzi Petrochemical Company,Dushanzi,Xinjiang,P.C.833699)

机构地区：[1]中国石油天然气股份有限公司独山子石化分公司,新疆独山子833699

出　　处：《乙烯工业》2020年第4期48-50,I0002,共4页Ethylene Industry

摘　　要：乙烯装置裂解炉出现对流段炉管泄漏,在行业内较为普遍。每个装置发生的部位与泄漏原因也各不相同,各装置对此均有深入研究,并配有相应防范措施。针对某厂裂解炉对流段泄漏现象,对泄漏部位进行了腐蚀炉管外观检查、腐蚀管道化学成分检测、金相检测、管道及腐蚀物电镜及能谱分析、腐蚀产物的XRD分析。通过检测判断,对流段炉管泄漏的原因是由于含磷的盐类结垢,导致垢下腐蚀造成炉管穿孔。基于以上分析,提出了加强炉管中物料的磷元素监控,不使用含磷药剂等措施,确保生产平稳。The leakage of furnace tubes in the convection section of cracking furnace of ethylene plant is common in the industry.The locations and causes of leakage vary from plant to plant.All the plants have carried out in-depth study on this problem and developed relevant preventive measures.In view of the leakage in the convection section of cracking furnace in a plant,the appearance inspection of corroded furnace tubes,the chemical composition determination of corroded pipelines,the metallographic inspection,the electron microscope and energy spectrum analysis of pipelines and corrosives,and the XRD analysis of corrosion products were carried out.Through inspection,it was determined that the leakage of furnace tubes in convection section was due to the scaling of phosphorus-containing salts,which resulted in under-deposit corrosion and then the perforation of furnace tubes.Based on the analysis,some measures were put forward such as strengthening the monitoring of phosphorus elements in the materials in furnace tubes and prohibiting the use of phosphorus-containing chemicals,so as to ensure the stable production.

关 键 词：裂解炉 对流段 腐蚀穿孔 结焦抑制剂 

分 类 号：TQ2[化学工程—有机化工]