便携式硫化氢在线检测仪研制及初步应用  

Development and preliminary application of portable hydrogen sulfide on-line detector

作　　者：贾彦杰 李荣光 孙伶 孙冬远 于立成 李琳 田亚莉 李传亮[4] 邱选兵[4,5] JIA Yanjie;LI Rongguang;SUN Ling;SUN Dongyuan;YU Licheng;LI Lin;TIAN Yali;LI Chuanliang;QIU Xuanbing(PipeChina Group Southwest Pipeline Co.,LTD,Chengdu 610041,China;PipeChina Group North Pipeline Co.,LTD,Langfang 065000,China;Hilong Group(Shanghai)Information Technology Limited Company,Shanghai 200949,China;Shanxi Province Engineering Research Center of Precision Measurement and Online Detection Equipment,School of Applied Science,Taiyuan University of Science and Technology,Taiyuan 030024,China;Shanxi Yangpu Photoelectric Technology Co.,LTD,Yangquan 045008,China)

机构地区：[1]国家管网集团西南管道有限责任公司,四川成都610041 [2]国家管网集团北方管道有限责任公司,河北廊坊065000 [3]海隆石油集团(上海)信息技术有限公司,上海200949 [4]太原科技大学应用科学学院,山西省精密测量与在线检测装备工程研究中心,山西太原030024 [5]山西阳谱光电科技有限责任公司,山西阳泉045008

出　　处：《大气与环境光学学报》2025年第1期95-103,共9页Journal of Atmospheric and Environmental Optics

基　　金：国家自然科学基金(62475182,52076145);山西省科技创新人才团队专项资助(202304051001034);山西省留学人员科技活动项目(20230031);山西省省筹资金资助回国留学人员科研资助项目(2023-151);山西省科研实践创新类项目(2023KY667)。

摘　　要：我国西南地区天然气产气矿大都为高含硫气矿,其中H2S不仅毒性大,而且容易腐蚀管道和仪器仪表,它的存在对天然气集输系统是一种较大的安全隐患。因此,快速、准确地监测天然气中的H2S含量,对于提高含硫天然气生产的安全性和效益具有重要意义。针对这一需求,本文研制了一种基于可调谐半导体激光吸收光谱技术(TDLAS)的便携式H2S在线检测仪。该检测仪的主体部分为高温长光程吸收池,其基长为15cm,采用七圆环光斑方案,有效光程为30m。结合脉宽调制控制器和质量流量计控制器,采用数字比例控制器实现了吸收池气压和温度的恒定。以中心波长为1578nm的近红外激光器作为激光光源,基于复杂可编程逻辑器件和模拟锁相技术,实现了H2S光谱信号的二次谐波(2f)的调制与解调。研制了该便携式检测仪的控制端硬件系统并开发软件程序,实现了H2S浓度的实时显示、存储和传输。采用标准气体对该检测仪进行了定标试验,结果表明探测的H2S光谱2f信号与H2S浓度的线性相关系数R2为0.99786。在西南某天然气清管站对研制的检测仪进行了现场试验,结果表明天然气管道中的H2S浓度较高,最大值为1.16mg/m3,现场管道腐蚀较为严重,初步示范了该检测仪的适用性。Most of the natural gas mines in southwestern China are high-sulfur gas mines.Among high-sulfur gas,H2S presents a dual threat due to its high toxicity and propensity for corroding pipelines and instruments,which poses substantial safety hazards to gathering and transportation systems of natural gas.Therefore,rapid and precise monitoring of H2S level in natural gas is of great significance for improving the safety and efficiency of sulfur-laden natural gas production.In response to this demand,a portable H2S online detector based on tunable diode laser absorption spectroscopy(TDLAS)technology was developed in this work.The main body of the detector was a high-temperature long-path absorption cell with a base length of 15 cm,and it adopted a seven-ring spot scheme with an effective optical path of 30 m.In combination with a pulse width modulation controller and mass flowmeter controllers,a digital proportional controller was used to achieve constant pressure and temperature in the absorption cell.A near-infrared laser with a central wavelength of 1578 nm was used as the laser source of the detector,and based on complex programmable logic device and analog phase-locking technology,the second harmonic(2f)modulation and demodulation of H2S spectral signal were achieved.Furthermore,the hardware system and software program for the control end of the portable detector were developed,which enables real-time display,storage,and transmission of H2S concentration.The detector was calibrated using H2S standard gases,and the results showed that the linear correlation coefficient(R2)between the detected 2f spectral signal of H2S and H2S concentration is high to 0.99786.Finally,a field test of the developed instrument was conducted at a natural gas pigging station in southwestern China,and the test results showed that the H2S concentration in the natural gas pipeline was high,with a peak value of 1.16 mg/m3,and the pipeline corrosion was severe on site,which preliminarily demonstrated the applicability of the developed portable

关 键 词：含硫天然气 清管站 可调谐半导体激光吸收光谱技术 高温长光程池 

分 类 号：O433.1[机械工程—光学工程]