Abstract: An improved method of introducing air into a rotary combustor for burning municipal solid waste in an incinerator, wherein a large amount of air is introduced over the top portion of the combustor adjacent the outlet end thereof to maintain the CO at acceptable low levels in response to a reduction in the amount of oxygen in the flue gas even when varying amounts of high heating value materials are introduced sporadically.

Abstract: An improved attachment for positioning a rotary waterwall combustor within a tire so it rotational axis is fixed and the rotary waterwall combustor, the tire and the attachment linkage are free to expand independently without inducing stresses due to differential thermal expansion; the attachment linkage comprises a plurality of support blocks attached to the rotary waterwall combustor and a plurality of support lugs attached to the tire with a plurality of links pivotally connected to the blocks and lugs with an elongated opening cooperatively associated with one of the pivotal connections to allow pivotal and axial movement and eliminate stresses caused by differential thermal expansion.

Abstract: A thermally turbulent combustion system for combusting solid fuel which includes a generally cylindrical, longitudinally extending stationary combustion chamber formed by a plurality of interconnected circumferential cooling pipes and fuel transport means provided adjacent the bottom of the chamber along the length thereof. A water cooled door may be provided at the inlet end of the chamber. The width of the chamber is greater than the width of the fuel path. A plurality of headers are connected to the pipes to supply and discharge cooling fluid thereto and therefrom. In one embodiment, the combustion chamber has a symmetrical cross-sectional configuration and the transport means is positioned centrally along the length of the bottom thereof. In another embodiment of the system, the chamber has an asymmetrical cross-sectional configuration and the transport means is positioned adjacent one side along the length of the bottom of the chamber.

Abstract: A combustion controller controls the supply of combustion gas to the combustion barrel of a rotary combustor used for incinerating solid waste material. The rotary combustor includes a combustion barrel having a gas-porous side wall and windboxes underneath the combustion barrel to supply the combustion gas to support incineration of the waste material into combustion products which include exhaust gases. The windboxes receive combustion gas via individual control ducts which are controlled by the combustion controller to regulate the corresponding supplies of combustion gas and thereby to provide substantially complete incineration of the solid material. An oxygen sensor detects the percentage of oxygen present in the exhaust gases and the combustion gas supplied to the combustion barrel is controlled to maintain the percentage of oxygen near a predetermined level.