激光光谱吸收原理水露点分析仪测定甲烷气体中水露点技术研究

Laser spectroscopy absorption technique for water dew point analysis in methane gas

摘要: 使用基于激光光谱吸收原理的激光法水露点分析仪检测不同浓度甲烷气体中水露点，并与镜面法精密露点仪进行比较。结果表明：激光法水露点分析仪能迅速、准确的对甲烷气体中的水露点进行检测，测量范围(4～400μL/L)、测量线性(≤0.8%FS)、重复性(≤4.2%)均能满足天然气在线露点检测需求。

Abstract: A laser spectroscopy absorption-based water dew point analyzer was employed to detect water dew points in methane gas with varying concentrations, and a comparative analysis was conducted against a chilled mirror dew point analyzer. Results demonstrate that the laser-based analyzer achieves rapid and accurate detection of water dew points in methane gas, with its measurement range(4 μL/L～400 μL/L), linearity(≤0.8%FS), and repeatability(≤4.2%) fully meeting the requirements for online dew point monitoring in natural gas applications.