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Dynamic Behavior of Tobacco Waste in the Coal-Fired Fluidized-Bed Boiler

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Cleaner Combustion and Sustainable World (ISCC 2011)

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Abstract

Circulating fluidized bed (CFB) technology is an advanced method for utilizing coal and other solid fuels in an environmentally acceptable manner. During the processing procedure in the nicotiana tabacum plants, lots of tobacco stem wastes are produced, which are normally being dumped to the landfill field. If this kind of waste can be used as a part of the fuel to be added into the coal in a CFB combustor, it will reduce the use of coal and then cut the net carbon emissions. To understand the complicated fluid dynamics of nicotiana tabacum wastes in the coal-fired CFB boiler, the mixing and segregation behavior of tobacco stalk are preliminary measured in a cylindrical fluidized bed. Obvious segregation behavior is found due to distinct differences in density and shape between tobacco stem and coal, which results in poor fluidization quality and bad combustion efficiency. To overcome this disadvantage, a jet with high gas velocity is introduced through the air distributor and a detailed experimental study is conducted in a fluidized bed made up of stem-sand mixture with different solid components at various jet velocities, which greatly improve the mixing performance of stem in the fluidized bed. The above findings are helpful for the technological upgrading of small- or middle-sized CFB boiler with adding tobacco stem into coal.

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Acknowledgments

Financial support from the National Natural Science Foundation of China (51076043 and 51025624), and Program for New Century Excellent Talents in University (NCET-09-0342) is gratefully acknowledged.

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Authors and Affiliations

  1. National Eng Lab for Biomass Power Generation Equipment, North China Electric Power University, Beijing, 102206, China

    Kai Zhang, Jian Chang, Honggang Chen & Yongping Yang

  2. State Key Laboratory of Heavy Oil Processing, China University of Petroleum, Beijing, 102249, China

    Bangting Yu

Authors
  1. Kai Zhang
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  2. Bangting Yu
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  3. Jian Chang
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  4. Honggang Chen
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  5. Yongping Yang
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Corresponding author

Correspondence to Kai Zhang .

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Editors and Affiliations

  1. Institute of Thermal Engineering, Tsinghua University, Beijing, China, People's Republic

    Haiying Qi

  2. Institute of Thermal Engineering, Tsinghua University, Beijing, China, People's Republic

    Bo Zhao

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© 2013 Springer-Verlag Berlin Heidelberg & Tsinghua University Press

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Zhang, K., Yu, B., Chang, J., Chen, H., Yang, Y. (2013). Dynamic Behavior of Tobacco Waste in the Coal-Fired Fluidized-Bed Boiler. In: Qi, H., Zhao, B. (eds) Cleaner Combustion and Sustainable World. ISCC 2011. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-642-30445-3_20

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  • DOI: https://doi.org/10.1007/978-3-642-30445-3_20

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  • Publisher Name: Springer, Berlin, Heidelberg

  • Print ISBN: 978-3-642-30444-6

  • Online ISBN: 978-3-642-30445-3

  • eBook Packages: EnergyEnergy (R0)

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