Journal
FRONTIERS OF PHYSICS
Volume 7, Issue 6, Pages 690-700Publisher
HIGHER EDUCATION PRESS
DOI: 10.1007/s11467-012-0259-7
Keywords
laser-induced breakdown spectroscopy (LIBS); on-line coal quality analysis; organic oxygen; proximate analysis; unburned carbon; multivariate inverse regression
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Funding
- National Natural Science Foundation of China [61127017, 61205216, 61275213, 61178009, 61108030, 60978018]
- National Basic Research Program (973 Program) [2012CB921603]
- International Science & Technology Cooperation Program of China [2001DFA12490]
- Major Program of the National Natural Science Foundation of China [10934004]
- NSFC Project for Excellent Research Team [61121064]
- Environmental Project of Shanxi Province [2011256]
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Our recent progress on developments of laser-induced breakdown spectroscopy (LIBS) based equipments for on-line monitoring of pulverized coal and unburned carbon (UC) level of fly ash are reviewed. A fully software-controlled LIBS equipment comprising a self-cleaning device for on-line coal quality monitoring in power plants is developed. The system features an automated sampling device, which is capable of elemental (C, Ca, Mg, Ti, Si, H, Al, Fe, S, and organic oxygen) and proximate analysis (Q(ad) and A(ad)) through optimal data processing methods. An automated prototype LIBS apparatus has been developed for possible application to power plants for on-line analysis of UC level in fly ash. New data processing methods are proposed to correct spectral interference and matrix effects, with the accuracy for UC level analysis estimated to be 0.26%.
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