Pyrolysis system for converting carboneous materials into biochar and method for operating same

A pyrolysis system for converting carboneous materials into biochar, comprising:

• a kiln adapted for containing hot air;
• a retort located inside the kiln and affixed to the kiln, the retort including an inlet for filling a chamber of the retort with the carboneous materials, and an outlet located vertically below the inlet for emptying the biochar from the chamber of the retort through gravity, the retort defining a port fluidly connected to the chamber for conveying pyrolysis gas and residues out of the retort;
• and
• a gas recovery system including
• a combustor supplying the hot air to the kiln via a hot air line fluidly connected from the combustor to the kiln;
• a conduit fluidly connected between the port of the retort and the combustor, the conduit conveying the pyrolysis gas and residues from the chamber of the retort to the combustor;
• and
• a filter cartridge fluidly connecting the chamber of the retort to the conduit for filtering the pyrolysis gas and the residues conveyed from the chamber of the retort to the combustor, the filter cartridge removably located inside the conduit and extending through the port at least partially inside the chamber of the retort.