Characterization of flow regime transition and particle motion using acoustic emission measurement in a gas-solid fluidized bed

Authors

  • Wang Jingdai,

    Corresponding author
    1. State Key Laboratory of Chemical Engineering, Dept. of Chemical and Biochemical Engineering, Zhejiang University, Hangzhou 310027, People's Republic of China
    • State Key Laboratory of Chemical Engineering, Dept. of Chemical and Biochemical Engineering, Zhejiang University, Hangzhou 310027, People's Republic of China
    Search for more papers by this author
  • Ren Congjing,

    1. State Key Laboratory of Chemical Engineering, Dept. of Chemical and Biochemical Engineering, Zhejiang University, Hangzhou 310027, People's Republic of China
    Search for more papers by this author
  • Yang Yongrong

    1. State Key Laboratory of Chemical Engineering, Dept. of Chemical and Biochemical Engineering, Zhejiang University, Hangzhou 310027, People's Republic of China
    Search for more papers by this author

Abstract

Particle motion is a major determinant of the dynamical performance of a fluidized bed. It plays an important role in determining and optimizing the complex correlation of fluidization condition between particle-particle and particle-environment in a system. A passive acoustic emission (AE) technique is applied to monitor, characterize, and control the fluidization condition of polyethylene particles in a gas-solid fluidized bed. Experimental results show that AE signals are very sensitive to the particle movements by analyzing energy distribution, which can help to understand the status of the system. The AE energy temporal analysis is further used to identify the transition of flow regimes. Moreover, the activity of particle motion can be quantitatively determined by using a combination of granular temperature and AE spatial energy analysis. This work provides valuable insights into the dynamic behavior of particles in a gas-solid fluidized bed based on AE technique. © 2009 American Institute of Chemical Engineers AIChE J, 2010

Ancillary