A combustion unit of incineration comprising such a combustion device and method of operation of such a combustor

Disclosed is a combustor (10) comprising a combustion chamber (11) with a cylindrical wall (12) extending along a vertical central axis (X10), a lower portion (14) and an upper part (15), a primary combustion zone (18) which is located in the lower part (14) of the chamber (11) and which has a substantially annular profile centered on the axis (X10), a system (20) fuel supply (101) which is capable of introducing a controlled quantity of fuel (101) into the chamber (11), a system (50) primary air supply which is capable of introducing air in the region primary combustion (18) and create a vortex flow (P1, P2, P3) of particles (102, 103) in the chamber (11) and a system (160, 180) for discharging the ashes (C1) from the combustion which is situated under the chamber (11). This device is characterized in that a dedusting cyclone (120) is arranged in the center of the combustion chamber (11), said cyclone being configured to receive combustion products charged particles (103) from the chamber (11) at least one inlet opening (126) and dust these combustion products separated by centrifugal action (P4) ash (C2) of the fumes (F1).