In this study, the ignition and combustion behavior of raw and heat-treated single particles of lignite were experimentally investigated, with a focus on the effect of heat treatment temperatures. The lignite particles were heat treated to various final temperatures (473, 623 and 773 K) in nitrogen and characterized using proximate, ultimate, and Fourier transform infrared spectroscopy (FTIR) analysis. A single lignite particle of 2 or 3 mm in diameter was suspended on a silicon carbide fiber and burned in air in a horizontal tube furnace operating at 1123 K. The ignition and combustion process of the particle was record using a color CCD camera at 25 fps. The ignition mechanism, ignition delay time, volatile flame duration, and burnout time of the single particles were examined by processing the recorded images. The proximate and ultimate analysis results indicated that the volatile matter and oxygen contents decreased, while the carbon content increased with increasing temperature of heat treatment. This trend was consistent with observations in the FTIR analysis, in which the intensity of oxygen-containing functional groups decreased with increasing the heat treatment temperature. The ignition of raw and heat treated lignite particles followed a joint hetero-homogeneous mechanism under all conditions studied. The ignition delay time, volatile flame extinction time, and the total combustion time decreased with increasing heat treatment temperature up to 623 K. A further increase in the heat treatment temperature to 773 K resulted in prolonged key ignition and combustion characteristic times.
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July 2019
Research-Article
Effect of Heat Treatment on the Combustion Characteristics of a Lignite
Zhezi Zhang,
Zhezi Zhang
Centre for Energy (M473),
The University of Western Australia,
35 Stirling Highway,
Crawley, WA 6009, Australia
e-mail: zhezi.zhang@uwa.edu.au
The University of Western Australia,
35 Stirling Highway,
Crawley, WA 6009, Australia
e-mail: zhezi.zhang@uwa.edu.au
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Mingming Zhu,
Mingming Zhu
The University of Western Australia,
Centre for Energy (M473),
35 Stirling Highway,
Crawley, WA 6009, Australia
e-mail: mingming.zhu@uwa.edu.au
Centre for Energy (M473),
35 Stirling Highway,
Crawley, WA 6009, Australia
e-mail: mingming.zhu@uwa.edu.au
Search for other works by this author on:
Jianbo Li,
Jianbo Li
Key Laboratory of Low-Grade Energy Utilization
Technologies and Systems of the Ministry of
Education of China,
Chongqing University,
Chongqing 400044, China
e-mail: jianbo.li@cqu.edu.cn
Technologies and Systems of the Ministry of
Education of China,
Chongqing University,
Chongqing 400044, China
e-mail: jianbo.li@cqu.edu.cn
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Kai Zhang,
Kai Zhang
Beijing Key Laboratory of Emission Surveillance
and Control for Thermal Power Generation,
North China Electric Power University,
Beijing 102206, China
e-mail: kzhang@ncepu.edu.cn
and Control for Thermal Power Generation,
North China Electric Power University,
Beijing 102206, China
e-mail: kzhang@ncepu.edu.cn
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Guoqing Shen,
Guoqing Shen
Key Laboratory of Emission Surveillance and
Control for Thermal Power Generation,
North China Electric Power University,
Beijing 102206, China
e-mail: shenguoqing@ncepu.edu.cn
Control for Thermal Power Generation,
North China Electric Power University,
Beijing 102206, China
e-mail: shenguoqing@ncepu.edu.cn
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Gang Xu,
Gang Xu
Key Laboratory of Emission Surveillance and
Control for Thermal Power Generation,
North China Electric Power University,
Beijing 102206, China
e-mail: xg2008@ncepu.edu.cn
Control for Thermal Power Generation,
North China Electric Power University,
Beijing 102206, China
e-mail: xg2008@ncepu.edu.cn
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Xianchun Li,
Xianchun Li
School of Chemical Engineering,
University of Science and Technology Liaoning,
Anshan 114051, China
e-mail: askd1972@163.com
University of Science and Technology Liaoning,
Anshan 114051, China
e-mail: askd1972@163.com
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Dongke Zhang
Dongke Zhang
Centre for Energy (M473),
The University of Western Australia,
35 Stirling Highway,
Crawley, WA 6009, Australia
e-mail: dongke.zhang@uwa.edu.au
The University of Western Australia,
35 Stirling Highway,
Crawley, WA 6009, Australia
e-mail: dongke.zhang@uwa.edu.au
Search for other works by this author on:
Zhezi Zhang
Centre for Energy (M473),
The University of Western Australia,
35 Stirling Highway,
Crawley, WA 6009, Australia
e-mail: zhezi.zhang@uwa.edu.au
The University of Western Australia,
35 Stirling Highway,
Crawley, WA 6009, Australia
e-mail: zhezi.zhang@uwa.edu.au
Mingming Zhu
The University of Western Australia,
Centre for Energy (M473),
35 Stirling Highway,
Crawley, WA 6009, Australia
e-mail: mingming.zhu@uwa.edu.au
Centre for Energy (M473),
35 Stirling Highway,
Crawley, WA 6009, Australia
e-mail: mingming.zhu@uwa.edu.au
Jianbo Li
Key Laboratory of Low-Grade Energy Utilization
Technologies and Systems of the Ministry of
Education of China,
Chongqing University,
Chongqing 400044, China
e-mail: jianbo.li@cqu.edu.cn
Technologies and Systems of the Ministry of
Education of China,
Chongqing University,
Chongqing 400044, China
e-mail: jianbo.li@cqu.edu.cn
Kai Zhang
Beijing Key Laboratory of Emission Surveillance
and Control for Thermal Power Generation,
North China Electric Power University,
Beijing 102206, China
e-mail: kzhang@ncepu.edu.cn
and Control for Thermal Power Generation,
North China Electric Power University,
Beijing 102206, China
e-mail: kzhang@ncepu.edu.cn
Guoqing Shen
Key Laboratory of Emission Surveillance and
Control for Thermal Power Generation,
North China Electric Power University,
Beijing 102206, China
e-mail: shenguoqing@ncepu.edu.cn
Control for Thermal Power Generation,
North China Electric Power University,
Beijing 102206, China
e-mail: shenguoqing@ncepu.edu.cn
Gang Xu
Key Laboratory of Emission Surveillance and
Control for Thermal Power Generation,
North China Electric Power University,
Beijing 102206, China
e-mail: xg2008@ncepu.edu.cn
Control for Thermal Power Generation,
North China Electric Power University,
Beijing 102206, China
e-mail: xg2008@ncepu.edu.cn
Xianchun Li
School of Chemical Engineering,
University of Science and Technology Liaoning,
Anshan 114051, China
e-mail: askd1972@163.com
University of Science and Technology Liaoning,
Anshan 114051, China
e-mail: askd1972@163.com
Dongke Zhang
Centre for Energy (M473),
The University of Western Australia,
35 Stirling Highway,
Crawley, WA 6009, Australia
e-mail: dongke.zhang@uwa.edu.au
The University of Western Australia,
35 Stirling Highway,
Crawley, WA 6009, Australia
e-mail: dongke.zhang@uwa.edu.au
1Corresponding author.
Contributed by the Advanced Energy Systems Division of ASME for publication in the JOURNAL OF ENERGY RESOURCES TECHNOLOGY. Manuscript received August 23, 2018; final manuscript received February 7, 2019; published online March 11, 2019. Assoc. Editor: Ashwani K. Gupta.
J. Energy Resour. Technol. Jul 2019, 141(7): 070705 (6 pages)
Published Online: March 11, 2019
Article history
Received:
August 23, 2018
Revised:
February 7, 2019
Citation
Zhang, Z., Zhu, M., Li, J., Zhang, K., Shen, G., Xu, G., Li, X., and Zhang, D. (March 11, 2019). "Effect of Heat Treatment on the Combustion Characteristics of a Lignite." ASME. J. Energy Resour. Technol. July 2019; 141(7): 070705. https://doi.org/10.1115/1.4042823
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