压力容器2024，Vol.41Issue(11)：49-56,73,9.DOI:10.3969/j.issn.1001-4837.2024.11.007
基于微射线切向扫描的流体诱导腐蚀异常在线监测
Research on online monitoring of flow-induced corrosion abnormality based on micro-ray tangential scanning
摘要
Abstract
With the improvement of material selection in oil and petrochemical equipment,corrosion caused by mismatches between materials and the environment is increasingly under control.However,corrosion induced by changes in fluid velocity and flow regimes has become more serious,especially the risk of corrosion leakage caused by slug flow and annular mist flow.In this paper,a micro-beam tangential flow monitoring method is proposed for the online detection of such corrosion.This method utilizes the V-shaped signals at the interface of different materials to identify material boundaries.It can also detect density variations within the medium through slope changes in the signal curve at the ridge of the boundary layer.For slug flows,the slope of the signal curve exhibits periodic variations,while for annular-mist flows,the density signal decreases to a constant value near the inner wall of the pipes.Based on these characteristics,slug and annular-mist flows can be identified.This method increases the theoretical sensitivity by 5 to 10 times for petrochemical pipelines due to the tangential measurement method,which in turn reduces the dose of the radiation source by 1 000 times and the safety distance from 10 m to less than 1 m for industrial CT while maintaining the same sensitivity,thus meeting the requirements for the use of online monitoring systems in the petrochemical industry.关键词
腐蚀/在线监测/微射线流态监测Key words
corrosion/online monitoring/micro-ray flow monitoring分类
机械制造引用本文复制引用
路笃辉,刘建良,王目凯,丛广佩,李兵,徐业银..基于微射线切向扫描的流体诱导腐蚀异常在线监测[J].压力容器,2024,41(11):49-56,73,9.基金项目
青海省重点研发与转化计划项目(2023-QY-215) （2023-QY-215）
"科创甬江2035"关键技术突破计划项目(2024Z256) （2024Z256）
