Hydrodynamics of Conical Spouted Beds Using Different Types of Internal Devices

Abstract

Abstract The hydrodynamics and performance of conical spouted beds provided with different types of draft‐tubes have been studied for the treatment of fine particles. Correlations for calculation of the minimum spouting velocity, operating pressure drop, and peak pressure drop have been developed as a function of dimensionless moduli that take into account the geometric factors, particle characteristics, and operating conditions. A statistical analysis of the data obtained following a design of experiments shows that the height of the entrainment zone is highly significant in the nonporous draft‐tubes, whereas the stagnant bed height is the counterpart in the open‐sided draft‐tubes.