A New Correlation For The Prediction of Minimum Fluidization of Sand And Irregularly Shape Biomass Mixtures In A Bubbling Fluidized Bed

摘要

This work aimed to determine the minimum fluidization velocity of biomass and river sand particles mixtures at various biomass mass fractions in the range of 0 to 1. Mixtures of river sand and rice husk or corn cob particles were chosen to represent mixtures of particles with different size, density and shape. Based on the experimental data obtained from the present work and those found in the literatures, a new correlation was developed to predict the minimum fluidization velocity for biomass and sand mixtures in terms of sphericity, Reynolds and Archimedes numbers. Further, it was found that the minimum fluidization velocity based on Archimedes number of biomass and sand particles mixture depends on the average sphericity of particles mixturesand the corresponding Reynolds number.The sphericity of the biomass and sand particles mixture affects Archimedes number of the mixture significantly in the laminar region, but does not affect the Archimedes number in the intermediate region. The predictions agree fairly well with the reported experimental and literatures data in the range of 1