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An afterburner for use as a secondary combustion chamber in a starved-air combustor system to further combust any combustible material in the combustion gas and entrained solid particle material discharge from the combustion chamber of the starved-air combustor system. The afterburner is lined with

An afterburner for use as a secondary combustion chamber in a starved-air combustor system to further combust any combustible material in the combustion gas and entrained solid particle material discharge from the combustion chamber of the starved-air combustor system. The afterburner is lined with refractory and includes a diverter plate positioned transversely to the incoming flow of combustion gases. The afterburner is divided into a plurality of reaction zones, each of which has an associated reaction air supply. The diverter plate imparts a cyclonic flow to the combustion gas which is enhanced by air injected in the combustion zones. The temperature of the gas discharged from the afterburner is monitored and the flow of reaction air controlled responsive to changes in discharge gas temperature from a predetermined temperature.

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A starved-air combustor comprising: a primary combustion chamber having an inlet end for receiving fuel, said primary combustion chamber for combusting said received fuel to produce hot, combustion gases and combustion residue, said primary combustion chamber further including an outlet end for disc

A starved-air combustor comprising: a primary combustion chamber having an inlet end for receiving fuel, said primary combustion chamber for combusting said received fuel to produce hot, combustion gases and combustion residue, said primary combustion chamber further including an outlet end for discharging said hot, combustion gases; a secondary combustion chamber having an inlet end for receiving said hot, combustion gases and an outlet end, said secondary combustion chamber for reacting said hot, combustion gases with selective amounts of air at a significant velocity to combust further any combustible material suspended in said received hot combustion gases to produce secondary hot combustion gases and for discharging said secondary hot combustion gases through said outlet end of said secondary combustion chamber, said secondary combustion chamber including at least first and second air supply zones, each said air supply zone comprising a plenum located adjacent to said secondary combustion chamber, an air supply into said plenum, and at least one air passageway for enabling the flow of air from said plenum into said secondary combustion chamber; and means for controlling the supply of said reaction air to said secondary combustion chamber according to the temperature of said secondary combustion gases discharged from said outlet end of said secondary combustion chamber.