Non-linear analysis method based online intelligent identification method for flow pattern of gas-solid fluidized bed

[0063] Step 1: Acquisition of pressure pulsation signals, such as figure 1 As shown, the gas-solid fluidized bed 3 collects data through the differential pressure transmitter 7 and the A / D digital signal conversion collector 8, and the collected data is recorded in the computer 9; a paperless recorder or other signal conversion can also be used Acquisition System. The sampling frequency is guaranteed to be 100Hz, and the sampling period is more than 10 seconds. The pressure pulsation signal was collected separately for the working conditions of different gas velocities and different bed thicknesses. In this example, a mixture of quartz sand and shaped biomass particles in different proportions was used, and a total of 120 groups were sampled.

[0064] Step 2: Process the pressure pulsation signal collected in Step 1 by nonlinear analysis method to extract characteristic values: Process the sampled data according to the aforementioned method to obtain the IMF energy interval v...