论文部分内容阅读
近几年来,我厂常减压蒸馏装置高温部位的腐蚀事故频频发生。通过对以往腐蚀事例的归纳整理,我们选取了几起代表事例进行剖析,探讨高温石油酸腐蚀规律,以寻求有效的防腐途径。一、常压炉辐射出口阀腐蚀原因分析该阀型号为Z41H—25、Dg25、Dg150,垂直安装在常压炉辐射出口管线上,工艺介质为鲁宁管输原油、温度360℃、表压9.8×10~4a左右,流体由下往上运动。1986—1987年间,阀体壁两次腐蚀穿孔,腐蚀率高达
In recent years, our factory atmospheric and vacuum distillation unit high temperature parts of the corrosion accidents occur frequently. Through summarizing and summarizing past corrosion cases, we select several representative examples to analyze and discuss the law of high temperature petroleum acid corrosion in order to seek effective anti-corrosion methods. First, the atmospheric pressure furnace radiation outlet valve corrosion analysis of the valve model Z41H-25, Dg25, Dg150, mounted vertically on the atmospheric furnace radiation outlet pipeline, the process medium is Lu Ning tube lose crude oil, temperature 360 ℃, gauge 9.8 × 10 ~ 4a or so, the fluid from bottom to top movement. During 1986-1987, the valve body wall was corroded twice by corrosion with a high corrosion rate