It is a common understanding that co-firing of petroleum coke and coal in circulating fluidized bed (CFB) is an efficient, economical and environment-friendly way to utilize petroleum coke with medium or high sulfur content. Experimental investigations on characteristics of pyrolysis, ignition and combustion of petroleum coke, coal and their blends with different mixing ratios were conducted on a thermogravimetric analyzer and a pilot CFB combustor systematically. Ignition temperature and burnout temperature were also acquired. The effects of several parameters in terms of the fuel category, the heating rate, the coal/coke mass flow ratio, the CO2 partial pressure, and the Ca/S molar ratio on the ignition and burnout characteristics of the petroleum coke and the blends of the petroleum coke and coal were verified. The results show that the ignition temperature and the burnout temperature of the petroleum coke are between those of bituminous coal and anthracite, which implies that its combustion characteristic is between bituminous coal and anthracite, but is more closer to the bituminous. The pyrolysis process of blends of petroleum coke and coal accords with mechanism model (1−α)1.5 well, and the combustion process accords with mechanism model w1.5 well. Although the ignition temperature of the blended fuels keeps the same when the heating rate, or the CO2 partial pressure or the Ca/S molar ratio increases, the burnout temperature decreases gradually. With decrease in the coal/coke mass flow ratio, the ignition temperature and the burnout temperature of the blends rise.
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18th International Conference on Fluidized Bed Combustion
May 22–25, 2005
Toronto, Ontario, Canada
Conference Sponsors:
- Advanced Energy Systems
ISBN:
0-7918-4183-9
PROCEEDINGS PAPER
Experimental Study on Characteristics of Pyrolysis, Ignition and Combustion of Blends of Petroleum Coke and Coal in CFB Available to Purchase
Changsui Zhao,
Changsui Zhao
Southeast University, Nanjing, P. R. China
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Chuanmin Chen,
Chuanmin Chen
Southeast University, Nanjing, P. R. China
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Xiaoping Chen,
Xiaoping Chen
Southeast University, Nanjing, P. R. China
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Fengjun Wang,
Fengjun Wang
Southeast University, Nanjing, P. R. China
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Wenxuan Wang,
Wenxuan Wang
Southeast University, Nanjing, P. R. China
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Aiqiang Zhu,
Aiqiang Zhu
Nanjing Institute of Technology, Nanjing, P. R. China
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Xin Wu
Xin Wu
Southeast University, Nanjing, P. R. China
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Changsui Zhao
Southeast University, Nanjing, P. R. China
Chuanmin Chen
Southeast University, Nanjing, P. R. China
Xiaoping Chen
Southeast University, Nanjing, P. R. China
Fengjun Wang
Southeast University, Nanjing, P. R. China
Wenxuan Wang
Southeast University, Nanjing, P. R. China
Aiqiang Zhu
Nanjing Institute of Technology, Nanjing, P. R. China
Xin Wu
Southeast University, Nanjing, P. R. China
Paper No:
FBC2005-78048, pp. 617-622; 6 pages
Published Online:
October 7, 2008
Citation
Zhao, C, Chen, C, Chen, X, Wang, F, Wang, W, Zhu, A, & Wu, X. "Experimental Study on Characteristics of Pyrolysis, Ignition and Combustion of Blends of Petroleum Coke and Coal in CFB." Proceedings of the 18th International Conference on Fluidized Bed Combustion. 18th International Conference on Fluidized Bed Combustion. Toronto, Ontario, Canada. May 22–25, 2005. pp. 617-622. ASME. https://doi.org/10.1115/FBC2005-78048
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