US Patent 10047307 Hybrid fixed-kinetic bed gasifier for fuel flexible gasification

A gasification system including: a casing defining: a solid material inlet; a fixed bed drying zone proximal the solid material inlet; a fixed bed pyrolysis zone arranged below the drying zone along a gravity vector, distal the solid material inlet across the pyrolysis zone; a kinetic bed combustion zone surrounded by the pyrolysis zone; and a fluidization channel extending through the drying zone and pyrolysis zone and fluidly connected to the combustion zone, the fluidization channel defining a kinetic bed reduction zone fluidly isolated from and thermally connected to the pyrolysis zone and the drying zone by the fluidization channel.