催化裂化油浆管道冲蚀损伤预测方法研究  

RESEARCH ON THE EROSION-CORROSION PREDICTION OF FCC SLURRY PIPE BY NUMERICAL SIMULATION

作　　者：牛鲁娜 韩磊 宋晓良 陈文武 潘隆 Niu Luna;Han Lei;Song Xiaoliang;Chen Wenwu;Pan Long(SINOPEC Research Institute of Safety Engineering Co.,Ltd.,State Key Laboratory of Safety and Control for Chemicals,Qingdao,Shandong 266071)

机构地区：[1]中石化安全工程研究院有限公司化学品安全控制国家重点实验室,山东青岛266071

出　　处：《石油炼制与化工》2023年第6期126-132,共7页Petroleum Processing and Petrochemicals

基　　金：中国石油化工股份有限公司合同项目(321123-3)。

摘　　要：以催化裂化油浆泵出口管道为研究对象,基于高温硫腐蚀和催化剂冲刷磨损机理分析,构建了一种适用于腐蚀、冲刷共同存在环境下的管道冲蚀损伤特性数值模拟预测方法,将流体流动、物质传递、化学反应和固体粒子追踪等多物理场模型耦合,获得流动参数、腐蚀介质浓度、催化剂碰撞角度分布,采用冲刷磨损速率、腐蚀减薄速率和表面减薄速率分别对冲刷、腐蚀和二者协同作用进行定量表征,并通过动态旋转挂片试验验证了数值模拟结果。结果表明:较大的压力、紊乱的流态能够驱动颗粒不规则运动,产生较大的冲刷磨损风险,也使管道近壁面的腐蚀介质分布不均匀,泵出口和水平直管段前端腐蚀介质浓度相对较高;在腐蚀-磨蚀协同作用下,管道壁面减薄速率平均值为0.46 mm/a,最大减薄速率可达0.55 mm/a;模型预测的损伤程度和减薄速率与实验结果基本吻合,研究成果可为管道损伤监测和寿命预测提供支持。The outlet pipeline of slurry pump for FCC unit was taken as the research object.Based on the analysis of high-temperature sulfur corrosion and erosion mechanisms,a numerical simulation method for predicting damage characteristics of pipelines in the presence of both corrosion and erosion was established.The distribution of the flow field parameters,the concentration of the corrosive medium and the collision angle of the solid catalyst were obtained by coupling multi-physical field models.The parameters such as erosion rate,corrosion rate,and surface thinning rate were used to quantitatively characterize the damage rule.The results showed that the irregular movement of solid particles could be driven by high pressure and turbulent flow pattern,which resulted in a large risk of erosion and wear;the distribution of the corrosire medium near the wall of the pipeline was not uniform.Under the synergistic action of erosion and corrosion,the average damage rate of pipeline wall was 0.46 mm/a,and the maximum damage rate was 0.55 mm/a.The damage behavior and thinning rate predicted by the model were in good agreement with the experimental results,which could provide support for monitoring and life prediction of pipelines.

关 键 词：催化裂化油浆 硫腐蚀 磨损 损伤 仿真模拟 

分 类 号：TE986[石油与天然气工程—石油机械设备]