Statistical and Frequency Analysis of Pressure Fluctuations in Liquid-Solid Exterior Circulating Fluidized Bed
液固两相外循环流化床压力波动信号的统计及频谱分析

The pressure fluctuation is important information that can be used to indicate the dynamic characteristics of the fluidized bed. In order to find out the flow characteristics of the liquid-solid exterior circulating fluidized bed, the time-domain analysis, frequency-domain analysis and correlation analysis were carried out with the wall pressure fluctuations in the liquid-solid exterior circulating fluidized bed. it was found that the pressure fluctuations at different positions were the same in the steady fluidization segment, the power distribution frequency ranges generated by the liquid flow and the motion of the particles concentrated in 0-10 Hz and 30-40 Hz. The probability density function was close to the normal distribution, and the pressure fluctuations signal existed between the periodic and random signals.