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EXPERIMENTAL DETERMINATION OF THE INFLUENCE OF SIZE OF SAND AND PARTICLE COMPOSITION OF BED ON FLUID DYNAMIC BEHAVIOR OF A BINARY BAMBOO-SAND MIXTURE IN FLUIDIZED BEDS

2015; Linguagem: Inglês

10.19146/pibic-2015-37341

2447-5114

Araí Augusta Bernárdez Pécora, Gustavo Oliveira Coelho,

Innovations in Concrete and Construction Materials

Binary mixtures composed by solid fuels and inert materials has received increasing attention in recent decades, due to its use in fluidized bed reactors for power generation.The objective of this study is to experimentally determine the influence of the size of the sand particles (inert material commonly used in power generation processes) and the composition of the bed up on the minimum fluidization velocity (Umf) , the onset fluidization velocity (Ufi) and full fluidization velocity (Ufc) of mixtures of sand and particles of grinded bamboo, the biomass of interest in this work.The analysis of the fluidization process was done by experimental determination of the pressure drop in the fluidized bed due to the gas flow, in order to raise the fluid bed curve and obtain Umf, Ufi and Ufc of binary mixtures.Five different compositions of biomass in the bed (0%, 2.5%, 5%, 7.5% and 10%) were tested, and five different sizes of inert material (231, 324, 460, 653 and 920 µm), keeping fixed the relationship between bed's height (H) and diameter (D) to 1.