화학공학소재연구정보센터
홈 로그인 로그아웃 연락처 사이트맵
Korean Journal of Chemical Engineering, Vol.32, No.1, 43-50, January, 2015
DOI10.1007/s11814-014-0181-5  Export Citation
Application of Hilbert-Huang transformation in fluidized bed with two-component (biomass particles and quartz sands) mixing flow
Xiaoyi Wang, Zhaoping Zhong†, Heng Wang, and Zeyu Wang
  • Key Laboratory of Energy Thermal Conversion and Control of Ministry of Education, School of Energy and Environment, Southeast University, Nanjing 210096, China
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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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