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

doi:10.3969/j.issn.1000-1158.2021.01.19

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摘要天然气水露点是关系天然气管道输送安全的重要指标之一,基于可调谐半导体激光吸收光谱技术(TDLAS)设计开发了天然气水露点分析装置。根据天然气现场应用需求,搭建天然气在线分析计量装置并进行测试,进行了激光法天然气在线分析计量装置关键技术集成与装备试制。开展了仪器的离线标定及实验室稳定性测试,在天然气输气站现场开展了仪器的重复性测试及与冷却镜面法露点仪的比对实验。实验结果表明,在水含量0~300μL/L范围内,仪器测量误差小于±0.5%FS, 24h内仪器漂移量不超过±1% FS,实时在线测量速度不低于1次/s,与冷却镜面法露点仪比对结果在6℃以内。

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	裴全斌
	闫文灿
	沈超
	姜琛

关键词 ：计量学, 水露点, 天然气, 可调谐半导体激光吸收光谱, 在线测量

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.

Key words： metrology dew point natural gas TDLAS on-line measurement

收稿日期: 2019-02-21 发布日期: 2021-01-19

PACS:

TB99

作者简介: 裴全斌(1986-),男,河南辉县人,国家管网集团西气东输公司武汉计量研究中心高级工程师,主要从事天然气计量管理及天然气在线仪表测试方面的研究工作。Email:peiquanbin@126.com

引用本文:

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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http://jlxb.china-csm.org:81/Jwk_jlxb/CN/10.3969/j.issn.1000-1158.2021.01.19 或 http://jlxb.china-csm.org:81/Jwk_jlxb/CN/Y2021/V42/I1/117

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