Eventos Anais de eventos
ENCIT 2016
16th Brazilian Congress of Thermal Sciences and Engineering
AN EXPERIMENTAL INVESTIGATION ON FLUIDIZATION OF TERNARY MIXTURE OF COAL, BIOMASS AND INERT
Submission Author:
Carlos Manuel Romero Luna , SP , Brazil
Co-Authors:
José Carlos de Andrade, Gretta Larisa Aurora Arce Ferrufino, Ivonete Ávila
Presenter: Carlos Manuel Romero Luna
doi://10.26678/ABCM.ENCIT2016.CIT2016-0628
Abstract
The co-firing or combined use of coal and biomass is shown as a short-term alternative to the problem of energy and environment. The co-firing can be performed in fluidized bed systems, however, due to their different physical properties, the fluidization of this materials is very difficult. The fluidization of coal blended with biomass particles is an important issue in co-firing process, since a improper fluidization leads to inefficient conversion. In this work is reported a study of fluidization behaviour of ternary mixtures in a fluidized bed laboratory scale tests cold conditions. The objective was to investigate the effects of bed materials (coal, biomass and inert) on fluidization characteristics that are critical for optimizing reaction conditions in a fluidized bed combustor. The hydrodynamics characteristics determined include the pressure drop, minimum fluidization velocity, bed fluctuation and bed expansion ratios. The experiments were performed in a 0.17 m internal diameter and 1.5 m height fluidized bed. A perforated plate gas distributor was used. The materials used were coal, biomass (sugarcane bagasse) and inert (sand). It was considered a proportion L/D equal to 1 for inert in order to allow a bubbling condition regime. The preliminary results show a stability of fluidization depend of inert mass fraction and materials segregation is caused when biomass mass fraction was increased. The experimental values of minimum fluidization velocities were compared with the correlations for ternary mixtures available in literature.
Keywords
fluidized bed, ternary mixture, Coal, Biomass, inert, fluidized bed, ternary mixture, Coal, Biomass, inert, fluidized bed, ternary mixture, Coal, Biomass, inert
