| 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, 2024, 17(5): 1060-1067. doi: 10.37188/CO.2023-0209
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The coal-fired boiler combustion process's economic, safety, and environmental performance holds great significance when constructing smart power plants. In coal-fired boiler combustion, H2S and CO are the two main high-temperature corrosive gases. They not only corrode the boiler near the wall surface but also pose severe harm to the atmospheric environment through their exhaust gases. Based on the near-infrared tunable diode laser absorption spectroscopy technology, combined with wavelength modulation spectroscopy and frequency division multiplexing technology, an unstaffed online real-time monitoring instrument for H2S and CO gas concentrations in the main combustion zone of coal-fired boilers was developed. Gas absorption spectroscopy in the
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