延迟焦化装置焦炭塔安全评估与剩余寿命预测方法

发布时间：2018-04-09 14:35

本文选题：有限单元法　切入点：延迟焦化　出处：《石油与天然气化工》2017年02期

【摘要】：延迟焦化装置中的焦炭塔长期受到温差和机械载荷的共同作用,在这些交变载荷的作用下,焦炭塔体中部易产生鼓胀变形,裙座角焊缝也容易萌生裂纹。因此,如何评估焦炭塔的安全性,并对其疲劳寿命进行预测一直是工程界和学术界的研究难点。运用有限元技术,针对焦炭塔容易产生失效的两个部位,分别位于塔体中部鼓胀位置和塔体下部裙座焊接接头位置进行风险评估,得到整个周期内焦炭塔出现最大应力的危险时间点,再运用ASME VIII-2中相关技术校核危险部位的安定性,最后运用Manson-Coffin公式和S-N曲线方法分别预测焦炭塔的剩余寿命。方法的建立为炼油装置中类似设备的风险评估和寿命预测工作提供了技术支撑。
[Abstract]:The coking tower in the delayed coking plant is affected by temperature difference and mechanical load for a long time. Under the action of these alternating loads, the central part of the coke tower is prone to bulge and deformation, and the corner weld of the pedestal is prone to crack initiation.Therefore, how to evaluate the safety of coke tower and predict its fatigue life has always been a research difficulty in engineering and academic circles.Based on the finite element technique, the risk assessment is carried out for the two parts of the coke tower which are prone to failure, which are located in the middle part of the tower and in the position of the welding joint of the lower part of the tower respectively.The dangerous time point of maximum stress in coke tower during the whole period is obtained, and then the stability of the dangerous part is checked by using the correlation technique of ASME VIII-2. Finally, the residual life of coke tower is predicted by Manson-Coffin formula and S-N curve method.The establishment of the method provides technical support for risk assessment and life prediction of similar equipment in refinery units.
【作者单位】：南京锅炉压力容器检验研究院;南京工业大学;
【基金】：国家自然科学基金“工业纯钛室温蠕变及其含裂纹承压结构完整性评定”(51475223) 国家质检总局科技项目“热处理工艺对锆-钛-碳钢三层复合板力学性能及耐腐蚀性能的影响”(2015QK265) 南京市质监局科技项目“延迟焦化装置焦炭塔风险评估和剩余寿命预测方法研究”(kj2015011)
【分类号】：TE962

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