D-410精制塔塔底封头筒体连接区域应力腐蚀力学原因分析  

MECHANICAL ANALYSIS ON THE STRESS CORROSION IN THE CONNECTION ZONE OF THE SKIRT AND BOTTOM HEAD OF THE DISTILLATION TOWER

作　　者：郭伟华[1] 杨树波[2] 张传鑫[3] 张卫义[3] 

机构地区：[1]中国石油化工股份有限公司北京燕山分公司,北京102500 [2]中国海洋石油总公司,北京100010 [3]北京石油化工学院机械工程学院,北京102617

出　　处：《石油化工设备技术》2012年第5期54-56,59,共4页Petrochemical Equipment Technology

基　　金：北京市教委科研项目(KM201010017001)

摘　　要：对D-410精制塔塔底封头与筒体连接区域进行了详细的有限元应力分析和强度评定,得到了该区域应力分布规律。计算分析结果表明,这个区域存在一个沿整个圆周分布的周向拉应力带,实际裂纹均沿轴向方向,符合应力腐蚀应力状态,结合材料的应力腐蚀敏感性和塔底介质存在硫化物、Cl-和溶解氧等情况,可以确定裂纹缺陷是应力腐蚀,而不是强度破坏。In this paper,the finite element stress analysis and strength evaluation are carried out for the D-410 distillation tower head and skirt bottom connected region to obtain the stress distribution law of this zone.The results from calculation and analysis indicate that there is a circumferential stress belt distributing along the circumference in this zone.The actual crack follows the axial direction,which is consistent with the stress state of stress corrosion.According to the conditions of the stress corrosion sensitivity,tower reactor materials containing sulfide,Cl-and dissolved oxygen,it can be determined that the crack defects are caused by stress corrosion instead of strength failure.

关 键 词：应力腐蚀 应力分布规律 封头裙座连接区 有限元应力分析 

分 类 号：TQ223.26[化学工程—有机化工]