Investigation of hydrodynamic features in two-stage steam-air-blown entrained-flow gasifier

Abstract

The goal of the work is to study the hydrodynamics features of media movement in IT SB RAS two-stage steam-air-blown entrained-flow gasifier. Analysis of the data obtained using the verified CFD model based on the results of the experiments showed that the conversion process in the mode proceeds in three phases, the localization of which depends on the input mode and design parameters. According to the results of CFD modeling, the injection of relatively cold, weakly superheated steam axial jet into second phases creates hydrodynamic, structural and temperature heterogeneity, which decreases markedly in the third phases. The supplied steam at the second phase performs mainly the functions of a cooler, causing a decrease in the temperature of the reaction mixture and a decrease in the rate of gasification reactions. © 2019 IOP Publishing Ltd.