Studies on hydrodynamics of annular circulating fluidised bed drier with millet particles

摘要

Millet particles of average diameter 2250 mum and density 1163.9 kg/m(3) were used to study the hydrodynamics of an annular circulating fluidised bed drier. Gap openings were varied from 12 to 72 mm and it was found that mass flux of solids remained constant for all air rates for gap openings greater than 64 mm. Dilute phase flow and dense phase slugging flow regime models were verified. A correction factor, K has been incorporated for the dense slugging flow regime. The error in the use of the model for pressure drop calculation was 25%.