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燃煤锅炉高温腐蚀气体激光在线监测设备研究

李龙 师帅 宫廷 田亚莉 郭古青 邱选兵 熊小鹤 李传亮

李龙, 师帅, 宫廷, 田亚莉, 郭古青, 邱选兵, 熊小鹤, 李传亮. 燃煤锅炉高温腐蚀气体激光在线监测设备研究[J]. 中国光学(中英文). doi: 10.37188/CO.2023-0209
引用本文: 李龙, 师帅, 宫廷, 田亚莉, 郭古青, 邱选兵, 熊小鹤, 李传亮. 燃煤锅炉高温腐蚀气体激光在线监测设备研究[J]. 中国光学(中英文). doi: 10.37188/CO.2023-0209
LI Long, SHI Shuai, GONG Ting, TIAN Ya-li, GUO Gu-qing, QIU Xuan-bing, XIONG Xiao-he, LI Chuan-liang. Research on laser online monitoring equipment for high-temperature corrosive gas in coal-fired boilers[J]. Chinese Optics. doi: 10.37188/CO.2023-0209
Citation: LI Long, SHI Shuai, GONG Ting, TIAN Ya-li, GUO Gu-qing, QIU Xuan-bing, XIONG Xiao-he, LI Chuan-liang. Research on laser online monitoring equipment for high-temperature corrosive gas in coal-fired boilers[J]. Chinese Optics. doi: 10.37188/CO.2023-0209

燃煤锅炉高温腐蚀气体激光在线监测设备研究

doi: 10.37188/CO.2023-0209
基金项目: 国家自然科学基金(No. U1810129,No. 52076145,No. 12304403);山西省留学人员科技活动项目(No. 20230031);山西省省筹资金资助回国留学人员科研资助项目(No. 2023-151);山西省基础研究计划(No. 202203021222204)
详细信息
    作者简介:

    李 龙(1998—),男,山西朔州人,硕士研究生,2020年于太原科技大学获得学士学位,主要从事激光光谱学及应用等方面的研究。E-mail:allong08@163.com

    李传亮(1983—),男,山东沂源人,博士,教授,博士生导师,2011年于华东师范大学获得博士学位,主要从事激光光谱学及应用、材料无损检测、光电传感装备等方面的研究。E-mail:clli@tyust.edu.cn

  • 中图分类号: O433.5+1

Research on laser online monitoring equipment for high-temperature corrosive gas in coal-fired boilers

Funds: Supported by National Natural Science Foundation of China (No. U1810129, No. 52076145, No. 12304403); Fund Program for the Scientific Activities of Selected Returned Overseas Professionals in Shanxi Province (No. 20230031); Shanxi Scholarship Council of China (No. 2023-151); Fundamental Research Program of Shanxi Province (No. 202203021222204)
More Information
  • 摘要:

    燃煤锅炉燃烧场的经济性、安全性和环保性对于智慧电厂建设具有重要意义。H2S和CO是燃煤锅炉燃烧场两种主要高温腐蚀气体,不仅腐蚀锅炉近壁面,其尾气对大气环境的危害都是极其严重的。基于近红外可调谐半导体激光吸收光谱技术,结合波长调制光谱技术和频分复用技术,研制了一款无人值守的燃煤锅炉主燃区H2S和CO气体浓度在线实时监测设备。仿真模拟了6335−6341 cm−1范围内气体吸收光谱,选定1.5 μm附近的近红外激光器作为激光光源;研制了一套耐高温耐腐蚀的Herriott型多光程池,实现激光与气体相互作用的效光程达15 m;开发了硬件电路及相应的固件程序,实现了H2S和CO吸收光谱信号的二次解调信号与浓度反演。线性度和Allan方差实验表明,其线性拟合相关系数分别为0.9998和0.9995,在73 s和53 s的积分时间下,H2S和CO最低检测极限分别为0.2×10−6 mol/mol和0.344×10−6 mol/mol。最后,将研制的设备在某300 MW电负荷的四角切圆燃煤锅炉主燃区燃烧气氛场进行应用示范,对水冷壁附近的H2S和CO进行了同步测量。结果表明,锅炉中H2S和CO的浓度呈正相关,厌氧燃烧会导致两种气体的含量增加,造成对水冷壁的腐蚀。

     

  • 图 1  H2S、CO及CO2吸收谱线

    Figure 1.  H2S, CO and CO2 absorption lines

    图 2  气体测量设备框图

    Figure 2.  Block diagram of gas measurement equipment

    图 3  H2S和CO吸收信号的幅度与标准气体浓度的关系

    Figure 3.  The relationship between the amplitude and standard gas concentration of H2S and CO absorption signals

    图 4  10×10−6 mol/mol的H2S和100×10−6 mol/mol的CO吸收信号随时间的Allan方差

    Figure 4.  Allan variance of 10×10−6 mol/mol H2S and 100×10−6 mol/mol CO absorption signals

    图 5  现场测量48 h的H2S和CO浓度数据

    Figure 5.  On-site measurement of H2S and CO concentration data for 48 hours

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  • 网络出版日期:  2024-05-15

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