Kotler V.R., Ryabov G.А.; JSC “VTI”
with atmospheric fluidized bed
By position fluidized bed (FB) furnaces are between the fuel-bed-firing furnaces and pulverized combustion furnaces. Together with the fuel-bed-firing furnaces they, first of all, can burn crushed coal and have a lattice, through which air is supplied to the bed. At increase in the air velocity, blown through the bed, the moment comes when the aerodynamic force, acting each particle of fuel, overcomes friction forces between the particles. A further growth of air flow leads to fluidization of particles of the fuel, it seems as if the bed is boiling (therefore, it is called “fluidized bed”), its height and pore volume increase.