摘要
塔河稠油盐含量、硫含量高,且油品性质呈逐年劣质化的趋势。新疆塔河炼化加工该类原油,生产运行时常压塔塔顶冷凝水铁离子含量偏高,最高达230mg/L,远超出炼油工艺防腐蚀管理规定中要求的3mg/L。停工检修期间发现,常压塔塔顶回流入口分布管有大量深约2.5mm的腐蚀坑,塔盘腐蚀减薄明显甚至破损。针对常压塔塔顶腐蚀严重的问题,结合原料及污水的采样数据、装置的设计参数和工艺参数,对腐蚀机理作了分析。相应地对电脱盐工艺进行了改进,常压塔塔顶冷凝水铁离子含量逐渐恢复正常,腐蚀情况得到控制。
The Tahe Refining Plant of Xinjiang province utilizes the Tahe heavy oil for production.This oil is characterized as with high salt and sulfur content,along with quality reducing by time.In production activities,residual condensate water generated in atmospheric tower has high iron ion content(up to 230 mg/l),which is far beyond the anti-corrosion management requirement of 3mg/l.During shutdown inspection,a large number of corrosion pits with depth about 2.5mm in the top reflow inlet distribution tube of the atmospheric tower were found,and the plate corrosion thinning and even damage occurred obviously.To resolve the corrosion problems in the atmospheric tower,sampled oil and sewage data,design parameters,process parameters of the equipment as well as the corrosion mechanism are analyzed.The results are used to optimize the electric desalting process.By using the improved process,the iron ion content of the top atmospheric tower condensate water is gradually reduced to normal(3 mg/l)and the corrosion condition has been controlled.
作者
涂亚明
程立
刘琪
崔明彧
袁龙
王红鹰
Tu Yaming;Cheng Li;Liu Qi;Cui Mingyu;Yuan Long;Wang Hongying(Petroleum Engineering College,Yangtze University,Wuhan 430100,China;SINOPEC Tahe Refining&Chemical Co.,Ltd,Kuche,Xinjiang 842000,China;Downhole operation company,PetroChina Dagang Oilfield Company,Tianjin 300280,China;Mechanisim Institue,Tuha Oilfield Research and Development Center,Shanshan,Xinjiang 838202,China)
基金
国家科技重大专项(2016ZX05056004-002)
关键词
硫化氢
重质油
常压塔
电脱盐
腐蚀
H2S
heavy oil
atmospheric tower
electric desalting
corrosion
