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Ultra-low flue gas emission monitoring based on differential optical absorption spectroscopy
Author(s): Jinbao Zhao; Jie Guo; Jiatong Shi; Zhiwei Yu; Han Zhang
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Paper Abstract

This paper describes a set of ultra-low smoke emission monitoring optical devices based on differential absorption spectroscopy (DOAS), which mainly includes a xenon lamp source, a sample cell, a spectrometer for light detection, and a Y-type optical fiber. The device utilizes a newly developed ultraviolet long path gas chamber, the energy of the ultraviolet spectrum is high, and the energy of the xenon lamp in the experiment is only enough to meet the application requirements. As well, based on DOAS optical device it has the advantages of high ultraviolet energy, small volume and high measurement accuracy. Therefore, the system solves the difficult problem of low concentration flue gas emission monitoring. The lower limit of detection of SO2, NO and NO2 concentration was 0.21 mg/m3, 0.13 mg/m3 and 0.61 mg/m3, respectively. Comparison of on-site field monitoring with high temperature FTIR (Fourier Transform Infrared Spectroscopy) flue gas emission monitor, the average concentrations of SO2, NO and NO2 measured by the two instruments were less than 14 mg/m3, 39 mg/m3 and 25 mg/m3 respectively, and the correlations were all above 0.995.

Paper Details

Date Published: 18 November 2019
PDF: 6 pages
Proc. SPIE 11189, Optical Metrology and Inspection for Industrial Applications VI, 111891E (18 November 2019); doi: 10.1117/12.2537517
Show Author Affiliations
Jinbao Zhao, China National Environmental Monitoring Ctr. (China)
Jie Guo, Hangzhou Chunlai Technology Co., Ltd. (China)
Jiatong Shi, Hangzhou Chunlai Technology Co., Ltd (China)
Zhiwei Yu, Hangzhou Chunlai Technology Co., Ltd. (China)
Han Zhang, Hangzhou Chunlai Technology Co., Ltd. (China)


Published in SPIE Proceedings Vol. 11189:
Optical Metrology and Inspection for Industrial Applications VI
Sen Han; Toru Yoshizawa; Song Zhang; Benyong Chen, Editor(s)

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