Acoustic Analysis of Particle鈥揥all Interaction and Detection of Particle Mass Flow Rate in Vertical Pneumatic Conveying
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- 作者：Lelu He ; Yefeng Zhou ; Zhengliang Huang ; Jingdai Wang ; Musango Lungu ; Yongrong Yang
- 刊名：Industrial & Engineering Chemistry Research
- 出版年：2014
- 出版时间：June 11, 2014
- 年：2014
- 卷：53
- 期：23
- 页码：9938-9948
- 全文大小：495K
- 年卷期：v.53,no.23(June 11, 2014)
- ISSN：1520-5045
文摘
A novel approach based on the passive acoustic emission (AE) monitoring technique has been established for analyzing particle鈥搘all collision and friction separately in the present work. Using power spectrum density analysis, the main frequency of AE signal caused from particle鈥搘all collision is found to be higher than that generated by particle鈥搘all friction. Besides, a method for quantitatively extracting the information on particle鈥搘all collision and friction has been set up by wavelet transform analysis. On the basis of these analyses, a theoretical approach has been established for relating the AE signals and solids loading ratio in a vertical pneumatic conveying pipe. The model predictions are verified using experimental data and are in good agreement. Particle mass flow rates obtained using this model give errors less than 6.62%. Conclusions can be drawn that the AE technique has great potential in the measurement of hydrodynamics in pneumatic conveying as well as similar particulate processes.