Signal Analysis of Acoustic Emission in Gas-Solid Fluidized Bed Reactor —From Data to Information
The passive acoustic emission (AE) technique has received more and more attention in recent years as a potentially non-intrusive and real-time process monitoring technique to be used in chemical engineering processes, especially in gas-solid fluidized bed reactors (FBRs). The underlying structure characteristics of AE signals and corresponding FBR were investigated by resorting to wavelet transform and Hurst analysis. It was found that most energy contained in AE signals are mainly originated from particle motion. According to the rigorous mathematical and physical derivation, frequency model was obtained and verified by performing systematic experiments. Moreover, flow regime transition and particle fluidization pattern could be characterized by obtaining the AE energy profiles at one or more specific locations. The attractor S based on attractor comparison as well as the coefficients of malfunction C based on complexity analysis, were both proved to be suitable for early warning of agglomeration monitoring inside the FBR. Finally, future research directions in multiphase flow were provided in order to promote the development of AE technique.
Zhou Yefeng Dong Kezeng Huang Zhengliang Sun Jingyuan Zhang Qing Wang Jingdai Yang Yongrong
State Key Laboratory of Chemical Engineering, Department of Chemical and Biological Engineering, Zhe State Key Laboratory of Chemical Engineering, Department of Chemical and Biological Engineering, Zhe
国际会议
World Conference on Acoustic Emission(2011年声发射国际会议)
北京
英文
96-101
2011-08-24（万方平台首次上网日期，不代表论文的发表时间）