摘要
连续重整装置中催化剂颗粒对提升管产生严重磨损,影响系统的安全平稳运行。从气固两相流冲刷磨损机理出发,分析影响塑性材料冲刷磨损的主要因素;对颗粒相采用Fluent离散相模型,并求解气相的非稳态Navi-er-Stokes方程,研究催化剂对提升管管壁的冲刷磨损规律,获得相对磨损速率在管壁的分布;结合管道测厚数据,验证计算模型的准确性。结果表明:在提升管第一个弯头背部有三个区域磨损比较严重,主要与催化剂颗粒团聚现象和冲击速率有关。该方法可用于气固两相流管道冲刷磨损预测、管道测厚定点、监控定位和管道结构优化设计。
Catalyst particles in continuous reforming unit result in serious wear on the wall of lift pipe, which affects the security and stability of system obviously. On the basis of erosive wear mechanism of gas-solid flow, main influencing factors of the erosive wear on plastic materials are analyzed in this paper. Fluent discrete-phase model is chosen to analyse particle-phase and solve the non-steady state Navier- Stokes equations of gas phase. According to the research of erosive wear discipline, the distribution of ero- sive wear rate is obtained. The accuracy of the calculation model is verified by combining with pipe thick- ness measurement data. The results show that there are three areas which have more serious wear on the bend back of the first elbow. It depends on the agglomeration and impact velocity of catalyst particles. This method can be used for the prediction of pipe erosive wear of gas-solid flow, designation of pipe thickness measurement, monitoring positioning, structural optimization and so on.
出处
《浙江理工大学学报（自然科学版）》
2010年第1期89-93,共5页
Journal of Zhejiang Sci-Tech University(Natural Sciences)
基金
国家高技术研究发展(863)计划(2009AA04Z422)
国家自然科学基金(20576125)
浙江省自然科学重点基金(Z4080352)
关键词
提升管
磨损机理
团聚
冲击速率
磨损速率
lift pipe
wear mechanism
agglomeration
impact velocity
wear rate
