Patent ID: 7600997

Claim:
A method for increasing the throughput of packages in a rotary kiln including a rotary tube ( 4 ) forming a combustion chamber ( 1 ), a post combustion chamber ( 2 ) disposed in communication with an outlet end of the rotary tube ( 4 ), said post combustion chamber ( 2 ) being provided with at least one after burner ( 12 ), at least one gas supply connected to the at least one after burner ( 12 ), and an exhaust gas duct ( 3 ) in communication with the post combustion chamber ( 2 ), said method comprising the following steps: a) introducing packages of waste material and oxygen containing gas into the combustion chamber ( 1 ), b) burning the packages with oxygen containing gas in the rotating tube ( 4 ) to form a combustion gas, c) discharging the combustion gas from the combustion chamber ( 4 ) to the post combustion chamber ( 2 ) for after combustion therein, and d) maintaining the combustion progress by optical sensor measurements in the rotary tube ( 4 ) so as to provide sensor values which are used for controlling the combustion conditions in the rotary tube ( 4 ) and in the post-combustion chamber ( 2 ) by controlling the fuel supply to the at least one burner in the post combustion chamber ( 1 ).