Device for converting a fuel

A device for converting a fuel comprising solid components, known as a solid fuel, into a gaseous fuel, said device comprising:

• a pyrolysis zone for pyrolyzing solid fuel, comprising pyrolysis means that are capable of decomposing said solid fuel into a pyrolysis gas and into a solid pyrolysis residue, known as coke;
• a combustion zone, which is distinct from the pyrolysis zone, for burning said pyrolysis gas and comprising combustion means, said combustion zone being surrounded by said pyrolysis zone;
• a path for passing pyrolysis gas to the combustion zone;
• and
• gas-circulation means for circulating gas in order to circulate said pyrolysis gas from said pyrolysis zone to the combustion zone;
• a reduction zone that has a passage communicating with the pyrolysis zone to collect coke obtained from pyrolysis of the solid fuel, a station for receiving said coke, and a passage communicating with the combustion zone for gas entering said gas reduction zone obtained from the combustion of pyrolysis gas in order to enrich said gas obtained from the combustion of pyrolysis gas in at least hydrogen, wherein
• said communicating passage comprises a ramp dropping from the pyrolysis zone to the reduction zone in order to collect coke in a receiving station under gravity,
• said pyrolysis zone is annular in shape and defined between an outer peripheral wall and an inner peripheral wall,
• said ramp co-operates with the inner peripheral wall to define an outlet for the solid residue obtained from pyrolysis of solid fuel, and
• the outlet being of a height that is smaller than a distance separating said peripheral walls from each other.