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ID 114337
著者
Liu, Renwei Xi’an Jiaotong University|Tokushima University
出口, 祥啓 Tokushima University|Xi’an Jiaotong University 徳島大学 教育研究者総覧 KAKEN研究者をさがす
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
キーワード
Laser-induced breakdown spectroscopy
Fly ash powder flow
Short nanosecond pulse width laser
Solid powder breakdown
Surrounding gas breakdown
資料タイプ
学術雑誌論文
抄録
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.
掲載誌名
Advanced Powder Technology
ISSN
09218831
cat書誌ID
AA1074214X
出版者
The Society of Powder Technology Japan|Elsevier
30
6
開始ページ
1210
終了ページ
1218
発行日
2019-04-04
備考
論文本文は2021-04-04以降公開予定
権利情報
© 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/
EDB ID
出版社版DOI
出版社版URL
言語
eng
著者版フラグ
その他
部局
理工学系