Abstract
Compared with a conventional pulverized coal fired boiler, the combustion efficiency of a CFB boiler is lower while the self-consumed service power is 1–2% higher. The solution of these problems is the key research topic for researchers and manufacturers of CFB boilers. Based on the State Specification Design Theory of CFB boilers, Tsinghua University proposed a novel CFB technology by reconstruction of the fluidization state in the furnace by adjusting the bed inventory and bed quality. Theoretical analyses show that there is an optimal bed pressure drop, around which the boiler operation can achieve the maximal combustion efficiency and with significant reduction of the wear of the heating surface and fan power consumption. The proposed novel process was implemented in a 75t/h CFB boiler. The results of field tests on this boiler validated the theoretical analyses.
This is a preview of subscription content, log in via an institution to check access.
Access this chapter
Tax calculation will be finalised at checkout
Purchases are for personal use only
Preview
Unable to display preview. Download preview PDF.
Similar content being viewed by others
References
Bai, D. L., and Kato, K., Journal of Chemical Engineering of Japan, 28(1995) 179–185.
Bai, D. L., and Jin, Y. Journal of Chemical Industry and Engineering (Chinese). 6(1991) 697–703.
Bai, D. L., Jin, Y., Yu, Z. Q. et al. Powder Technol. 71(1992) 51–58.
Chang, H. and Louge, Powder Technol. 70(1992) 259–270.
Fujima, Y., Tagashira, K. and Takahashi, Y. et al. in: P. Basu, M. Horio and M. Hasatani (Eds.), CFB Technology Ill, Pergamon Press, 1990, pp.85–90.
Hu, N., Yang, H. R., Zhang, H., et al., Experimental study on gas-solids flow characteristics in a CFB riser of 54m in height, 20th International Fluidized Bed Combustion Conference, May, 2009, Xi’an China.
Kim, S., Numkung, W. and Kim S., Korean J. Eng. 16(1999) 82–88.
Li, J. F., Yang, S., Hao, J. H. et al., Operational Status of 135MWe CFB Boilers in China, 20th International Fluidized Bed Combustion Conference, May, 2009, Xi’an China.
Li, J. F., Mi, J. H., Hao, J. H. et al., Operational Status of 300MWe CFB Boilers in China, 20th International Fluidized Bed Combustion Conference, May, 2009, Xi’an China.
Li, J., Tung, Y., Kwauk, M. in: J. F. Large, P. Basu (Eds.), Criculating Fluidized Bed Technology IT, Pergamon Press, Oxford, 1988, 193–203.
Li, Y., Chen, B., Wang, F. et al. M. Kwauk and D. Kunni (Eds.), Science and Technology Press, Beijing, 1982.
Lu, J. F., Zhang, J. S., Yue, G. X. et al. Heat Transfer Coefficient Calculation Method of the Heater in the Circulating Fluidized Bed Furnace. Heat Transfer — Asia Research, 31(2002) 540–550.
Mori, S., Liu, D., Kato, K., et al, Powder Technol. 70(1992), 223–227.
Rhodes, M. and Laussmann, J. P. Can. J. Chem. Eng. 70 (1992) 625–630.
Weinstein, H., Graff, R. A., Meller, M., et al. T, in: D. Kunii, R. Toei (Eds.), Fluidization, vol. IV, Engineering Foundation, New York, 1983, pp.299–306.
Xiao, X. B., Yang, H. R., Zhang, H. et al., Energy and Fuels, 19 (2005) 1520–1525.
Xu, G. and Gao, S., Powder Technol. 137(2003) 63–76.
Yang H. R., Yue, G. X., Lu, J. F., et al, CFB boiler combustion technology with low bed pressure drop. Appl. Patent No.200710176731.1; Publication No.101149146, 2007.
Yang, J. H., Yang, H. R., Yue, G.X., Journal of Power Engineering, 28(2008) 509–513.
Yang, H.R., Wirsum, M., Lu, J.F., et al., Fuel Processing Technol. 85(2004),1403–1414.
Yang, H. R., Yue, G. X., Xiao, X. B. et al., Chemical Engineering Science, 60(2005) 5603–5611.
Yue, G. X., Lu, J. F., H. Zhang, et al. Design Theory of Circulating Fluidized Bed Boilers. in: L. Jia (Eds.),18th International Fluidized Bed Combustion Conference, May 18–21, 2005, Toronto Canada.
Author information
Authors and Affiliations
Editor information
Editors and Affiliations
Rights and permissions
Copyright information
© 2009 Tsinghua University Press, Beijing and Springer-Verlag Berlin Heidelberg
About this paper
Cite this paper
Yang, H.R. et al. (2009). Novel CFB Boiler Technology with Reconstruction of its Fluidization State. In: Yue, G., Zhang, H., Zhao, C., Luo, Z. (eds) Proceedings of the 20th International Conference on Fluidized Bed Combustion. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-642-02682-9_25
Download citation
DOI: https://doi.org/10.1007/978-3-642-02682-9_25
Publisher Name: Springer, Berlin, Heidelberg
Print ISBN: 978-3-642-02681-2
Online ISBN: 978-3-642-02682-9
eBook Packages: Chemistry and Materials ScienceChemistry and Material Science (R0)