常压储罐底板泄漏声发射检测方法及应用

Acoustic emission detection method and application of atmospheric tank floor leakage

为解决常压储罐泄漏检测中容易出现的信号漏采、定位不精准等问题,基于声发射泄漏检测要求,提出一种适用于储罐底板泄漏检测的液位多级变化工况下声发射检测及验证方法,并规定具体的工艺流程。以某石化公司储罐为例,分析不同液位时采集得到的声发射信号特征,同时利用声发射技术对储罐底板泄漏进行区域定位,并采用开罐检测方法进行验证,发现随着液位的增加,信号活性先增大后减小,储罐底板泄漏声发射检测结果与开罐检测高度一致。研究结果表明:在多级液位下采集储罐底板泄漏声发射信号,可提高泄漏源定位精度,有效避免漏检情况发生。

Aiming at the problems such as signal leakage and inaccurate location in the leakage detection of storage tanks,based on the general requirements of acoustic emission leakage detection,an acoustic emission detection and verification method and implementation steps under the condition of multi-level change for tank bottom leakage detection were put forward.Taking the storage tank of a petrochemical company as an example,the characteristics of acoustic emission signals collected at different liquid levels were analyzed.At the same time,acoustic emission technology was used to locate the leakage of the storage tank bottom,and an out-of-service detection method was used to verify it.It was found that with the increase of liquid level,the signal activity first increased and then decreased,and the acoustic emission detection results of storage tank bottom leakage were highly consistent with out-of-service detection.The results show that collecting the leakage acoustic emission signal of the tank bottom at multi-level can improve the location accuracy of the leakage source and effectively avoid the occurrence of missed detection.