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3D Full-Loop Simulation of an Industrial-Scale Circulating Fluidized Boiler

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Cleaner Combustion and Sustainable World (ISCC 2011)

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Abstract

In this study, 3D full-loop simulations of a CFB boiler are carried out. FLUENT®6.3 is used as the solver, where an Eulerian multiphase model with EMMS-based drag model is employed. The wide particle size distribution are considered and divided into several groups to better represent the polydisperse behavior of ash particles. The simulation shows that, compared to the conventional drag model, EMMS-based model predicts more reasonable pressure drop of furnace and larger slip velocity at the lower elevations of the furnace. Further work is under way to improve the full-loop simulation.

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Abbreviations

d p :

particle diameter, m

G s :

solids flux, kg/(m2·s)

H:

Total height of furnace, m

H D :

heterogeneity index

Re s :

Reynolds number,d p U slip ρ f /μ f

U g :

superficial gas rate, m/s

v :

real velocity, m/s

β :

drag coefficient with structure in a control volume, kg/(m3·s)

β 0 :

drag coefficient without structure in a control volume, kg/(m3·s)

ε g :

voidage

ε s :

solids concentration

ε mf :

incipient voidage

ε max :

maximum voidage for particle aggregation

μ :

viscosity, Pa·s

ρ :

density, kg/m3

g :

gas phase

s :

solid phase

p :

particle

(Bold characters are for vectors or tensors)

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Authors and Affiliations

  1. State Key Laboratory of Multi-phase Complex Systems, Institute of Process Engineering, Chinese Academy of Sciences, Beijing, 100190, China

    Bona Lu, Nan Zhang, Wei Wang & Jinghai Li

Authors
  1. Bona Lu
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  2. Nan Zhang
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  3. Wei Wang
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  4. Jinghai Li
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Corresponding author

Correspondence to Wei Wang .

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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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Lu, B., Zhang, N., Wang, W., Li, J. (2013). 3D Full-Loop Simulation of an Industrial-Scale Circulating Fluidized 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_87

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  • DOI: https://doi.org/10.1007/978-3-642-30445-3_87

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  • Publisher Name: Springer, Berlin, Heidelberg

  • Print ISBN: 978-3-642-30444-6

  • Online ISBN: 978-3-642-30445-3

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