基于激光吸收光谱的烷烃泄漏遥测技术  

Remote measurement technology of alkanes leakage based on laser absorption spectroscopy

作　　者：刘俊阳 王佳楠 李明 王晓霖 王雨新 姜萌[2] 张子昊 LIU Jun-yang;WANG Jia-nan;LI Ming;WANG Xiao-lin;WANG Yu-xin;JIANG Meng;ZHANG Zi-hao(Sinopec Dalian Research Institute of Petroleum and Petrochemicals Co.Ltd.,Dalian 116041,China;Institute of Beijing Aerospace Control Device,Beijing 100094,China)

机构地区：[1]中石化(大连)石油化工研究院有限公司,辽宁大连116041 [2]北京航天控制仪器研究所,北京100094

出　　处：《激光与红外》2024年第8期1237-1240,共4页Laser & Infrared

基　　金：辽宁省“兴辽英才计划”项目(No.XLYC2007090)资助。

摘　　要：本文旨在满足石化厂区对多种烷烃泄漏气体的远程遥测需求,并考虑到这些石化储罐多位于海边,因此需要考虑水汽谱线对烷烃谱线的影响。为排除空气中水汽和二氧化碳的影响,选择了丙烷中红外波段3364 nm的吸收峰。通过使用ICL激光器,在此波段实现了对丙烷和正丁烷两种气体的同时测量。提出了一种开放光程的方法,将反射膜放置在距离100 m外,通过镜头将返回的光聚集到探测器上,从而实现对100 m距离内烷烃气体的远程遥测分析。本文提供了两种气体在100 m处的吸收信号和谐波信号的数据,并根据谐波信号和噪声的分析,计算出待测气体的检测限低于100 ppm·m。This study aims to address the remote measurement requirements for multiple alkane gas leaks in petrochemical plant areas,taking into account the effect of water vapor spectra on alkenes spectra as most of these petrochemical storage tanks are located at the sea side.To eliminate the influence of water vapor and carbon dioxide in the air,the absorption peak of propane at an infrared wavelength of 3364 nm is selected.By using an ICL laser,simultaneous measurement of both propane and n-butane gases in this band is achieved.Furthermore,an open light range method is proposed where a reflective film is placed at a distance of 100 meters and the returned light is gathered through a lens onto a detector,thus enabling remote telemetry analysis of alkane gases at a distance of 100 meters.This paper presents data on the absorption signals and harmonic signals of the two gases at 100 meters.Based on the analysis of harmonic signals and noise,the detection limit for the gas to be tested is calculated to be less than 100 ppm·m.

关 键 词：石化厂区 泄漏气体 远程遥测 丙烷 正丁烷 

分 类 号：O433.51[机械工程—光学工程] TE991.1[理学—光学]