Effect of Conical Distributor Parameters on the Fluidisation Characteristics of Cylindrical Fluidised Bed Reactors

摘要

Integrated gasification combined cycle (IGCC) is one of the most advanced power generation technologies. The normal approach to design a commercial size pressurised fluidised bed gasifier (PFBG) for IGCC is based on large-scale pilot plant experimentation or scale-up of hydrodynamically similar cold model. The conical distributor is a critical component of PFBG, which affects the hydrodynamic performance of the fluidiser. A correlation to bring out the effect of distributor apex angle a on fluidisation quality has been developed and presented in this paper. The correlation has been validated with that of Antoni Lucas et al. [1]. The average deviation and standard deviations of the correlation are 6.8 and 27%, respectively. The experimental results show that minimum fluidising velocity increases with increase in a. The bed voidage derived from Ergun's equation is found to decrease with increase of a indicating better fluidisation quality. This paper aims to study the fluidisation characteristics of cylindrical fluidised bed reactors with varying apex angle of conical distributor and derive a correlation of Reynolds number at minimum fluidising velocity as a function of Archimedes number and apex angle of the distributor.