Patent ID: 8535053

Claim:
A method for incineration of combustible waste during the manufacture of cement clinker comprising: preheating cement raw meal in a preheater system with or without a calciner; burning the preheated cement raw material to form clinker in a kiln; cooling the clinker in a subsequent clinker cooler; introducing waste to a waste inlet of a compartment in communication with the kiln and supporting the waste on a supporting surface incorporated in the compartment; actively transporting the waste while simultaneously subjecting the waste to incineration through the compartment to an outlet of the compartment, wherein at least a part of the incineration of the waste in the compartment takes place in a sub-stoichiometric atmosphere; venting hot exhaust gases produced in connection with the incineration of the waste to the preheater system for heating the cement raw meal; extracting slag generated during the waste incineration process from the compartment; and introducing exhaust gases from the kiln containing NOx into and through the compartment in counterflow to the waste stream, further comprising feeding the exhaust gases generated during the waste incineration process to the calciner of the preheater for calcination of the cement raw meal.