摘要
某常压蒸馏装置掺炼轻质原油或回炼轻污油时常压塔负荷变大,当常压塔塔顶(简称常顶)回流量大于22t/h时,常顶和进料段压差由20kPa增加到40kPa以上,常顶油和常一线油出现馏程重叠。现场调研发现,常压塔上数第9~16层塔盘、浮阀有大量结垢沉积物,几乎堵塞整块塔盘。对现场堵塞位置垢样进行采样,元素分析、XRD、XRF表征结果表明,常压塔一中段处垢样的主要成分是NH_4FeP_2O_7。通过高温缓蚀剂模拟结垢试验确定了塔顶结垢堵塞的原因,并针对性提出优化解决措施。
The load of atmospheric distillation unit is greatly increased when the feed blends with the light crude oil or the light sump oil recycled.When the reflux of the tower is greater than or equals to 22 t h,the pressure drop between the top of the tower and the feed entering position increases from 20 kPa to 40 kPa with the overlap of boiling range of the top oil and the first side line oil.It is found that there are a lot of fouling deposits at the 9-16 layer trays,almost blocking the whole tray.The deposits were characterized by the elemental analysis,XRD and XRF.The results indicate that the main component of the deposit is NH4FeP2O7,confirmed by the simulation test of high temperature corrosion inhibitor.Finally,the optimization solutions for the problem are proposed.
作者
马方义
董健
孙文刚
潘岩
葛玉龙
王涛
Ma Fangyi;Dong Jian;Sun Wengang;Pan Yan;Ge Yulong;Wang Tao(CNOOC Oil Refining and Chemical Engineering Research Institute(Qingdao),Qingdao,Shandong 266500)
出处
《石油炼制与化工》
CAS
CSCD
北大核心
2018年第4期23-26,共4页
Petroleum Processing and Petrochemicals
关键词
垢样
分析
表征
高温缓蚀剂
堵塞
fouling deposit
analysis
characterization
high temperature corrosion inhibitor
blockage
