A CFD model of the fluidized-bed furnace chamber of the OP-150 boiler pregasifier

The values obtained by means of measurements of the fluidized-bed furnace chamber of the pregasifier of the Stalowa Wola power plant OP-150 boiler were compared with the results of numerical calculations performed using the Ansys.Fluent code [1] to verify the numerical model (and to select the sub-models). Two variants of the CFD model were taken into consideration in an attempt to simulate the furnace chamber operation in real conditions and in conditions created by closing the “circulation windows”. The steady-state processes of biomass pyrolysis, of the combustion of the volatile matter resulting from it and of the gasification and combustion of char were modelled. Some simplifications (solid bed, single-phase flow model in the Euler coordination system) were assumed in the CFD model, which did not have a considerable adverse effect on the obtained results.