ID | 114337 |
Author |
Liu, Renwei
Xi’an Jiaotong University|Tokushima University
Deguchi, Yoshihiro
Tokushima University|Xi’an Jiaotong University
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Nan, Weigang
Tokushima University|Xi’an Jiaotong University
Hu, Ruomu
Xi’an Jiaotong University
Wang, Zhenzhen
Tokushima University|Xi’an Jiaotong University
Fujita, Yuki
Tokushima University
Tanaka, Seiya
Tokushima University
Tainaka, Kazuki
The Central Research Institute of Electric Power Industry
Tanno, Kenji
The Central Research Institute of Electric Power Industry
Watanabe, Hiroaki
Kyushu University
Liu, Jiping
Xi’an Jiaotong University
Yan, Junjie
Xi’an Jiaotong University
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Keywords | Laser-induced breakdown spectroscopy
Fly ash powder flow
Short nanosecond pulse width laser
Solid powder breakdown
Surrounding gas breakdown
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Content Type |
Journal Article
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Description | The unburned carbon in fly ash is one of the important factors for the boiler combustion condition. Controlling the unburned carbon in fly ash is beneficial for fly ash recycle and to improve the combustion efficiency of the coal. Laser-induced breakdown spectroscopy (LIBS) technology has been applied to measure the fly ash contents due to its merits of non-contact, fast response, high sensitivity, and real-time measurement. In this study, experimental measurements have been adopted for fly ash flows with the surrounding gases of N2 and CO2, while the CO2 concentration varified to evaluate the CO2 effect on the unburned carbon signal from fly ash powder. Two kinds of pulse width lasers, 6ns and 1ns, were separately adopted to compare the influence of laser pulse width. Results showed that compared with 6ns pulse width laser, plasma temperature was lower and had less dependence on delay time when using 1ns pulse width laser, and spectra had more stable background. By using 1ns pulse width laser, the emission signal from surrounding CO2 also decreased because of the less surrounding gas breakdown. The solid powder breakdown signals also became more stable when using 1ns pulse width laser. So it is demonstrated that 1ns pulse width laser has the merits for fly ash flow measurement using LIBS.
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Journal Title |
Advanced Powder Technology
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ISSN | 09218831
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NCID | AA1074214X
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Publisher | The Society of Powder Technology Japan|Elsevier
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Volume | 30
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Issue | 6
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Start Page | 1210
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End Page | 1218
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Published Date | 2019-04-04
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Rights | © 2019. This manuscript version is made available under the CC-BY-NC-ND 4.0 license http://creativecommons.org/licenses/by-nc-nd/4.0/
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EDB ID | |
DOI (Published Version) | |
URL ( Publisher's Version ) | |
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language |
eng
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TextVersion |
Author
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departments |
Science and Technology
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