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Issue
Korean Journal of Chemical Engineering,
Vol.32, No.1, 43-50, 2015
Application of Hilbert-Huang transformation in fluidized bed with two-component (biomass particles and quartz sands) mixing flow
Wang X, Zhong Z, Wang H, Wang Z
Hilbert-Huang transformation was used to investigate the nonlinear characteristics of two-component (biomass particles and quartz sand) mixing flow by analyzing the pressure fluctuation signals in fluidized bed. Based on empirical mode decomposition (EMD), the Hilbert-Huang spectra in bubbling and slugging flow patterns were obtained and analyzed. In bubbling flow pattern, compared with one-component (quartz sand) flow, the energy of two-component mixing flow is lower in 0-5 Hz and higher in 40-50 Hz. In slugging flow pattern, the energy in pressure fluctuation mainly lies in 0-5 Hz. and the effect of biomass particles on the Hilbert-Huang spectrum is not very obvious. Compared with traditional power spectral density (PSD), HHT is much more suitable for investigating pressure fluctuation signals in fluidized beds.
Keywords: Fluidized Bed; Biomass Particle; Empirical Mode Decomposition; Hilbert-Huang Transformation; Pressure Fluctuations
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