Study on Dew Point Measurement of Natural Gas Based on Tunable Semiconductor Laser Absorption Spectrometry
PEI Quan-bin1,YAN Wen-can1,SHEN Chao2,JIANG Chen2
1. Wuhan Metrology Research Center,National Pipeline Network Group West to East Gas Transmission Company,Wuhan, Hubei 430073, China
2. Sinopec Natural Gas Branch, Jinan, Shandong 250101, China
Abstract：The water dew point of natural gas is one of the important indicators related to the safety of natural gas pipeline transportation. Based on the tunable semiconductor laser absorption spectroscopy (TDLAS), a natural gas water dew point analysis device has been designed and developed. According to the field application requirements of natural gas, the on-line analysis and measurement device of natural gas was built and tested, and the key technology integration and equipment trial production of laser method natural gas online analysis and measurement device were carried out. The off-line calibration and laboratory stability test of the instrument were carried out. The repeatability test of the instrument and the comparison experiment with the cooling mirror dew point instrument were carried out in the field of natural gas transmission station. The experimental results showed that in the range of 0~300μL/L water content,the measuring error of the instrument was less than ±0.5% FS,the drift of the instrument was not more than ±1%FS in 24 hours,and the real-time on-line measurement was not less than one time per second. The results were within 6℃ compared with those of the cooling mirror dew point instrument.
裴全斌,闫文灿,沈超,姜琛. 基于可调谐半导体激光吸收光谱法测定天然气水露点技术研究[J]. 计量学报, 2021, 42(1): 117-122.
PEI Quan-bin,YAN Wen-can,SHEN Chao,JIANG Chen. Study on Dew Point Measurement of Natural Gas Based on Tunable Semiconductor Laser Absorption Spectrometry. Acta Metrologica Sinica, 2021, 42(1): 117-122.
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2021, Vol. 42 
