Effect of Gas-solid Reaction on Fluctuation Characteristics in a Fluidized Bed
Regarding the gas-solid pulsation behaviors in fluidized bed reaction process,the Eulerian-Lagrange method is employed to explore the impact of particle size variation caused by the reaction on flu-idization characteristics and bubble evolution behaviors in fluidized beds.The wavelet analysis method is adopted to analyze the change of energy fraction caused by the reactions.The results reveal that the pro-gress of reaction leads to a continuous increase in the amount of gas products,and the bubble effect is more pronounced,resulting in a more severe backmixing of bed materials in the bed.The reaction gener-ally increases the energy fraction of particle pulsation in contrast to that without the reaction.As the reac-tion proceeds and the reaction degree decreases,the radial distribution difference in energy fraction is weakened.
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