Patent ID: 6345981
Filing Date: 2002-02-12
Classification: C04B,F27B,F27D,Y02P

Abstract:
In an apparatus for delivering solid waste derived supplemental fuel elements into a preheater or precalciner cement kiln having a riser duct, a rotary vessel, a shelf-transition portion and a kiln gas stream comprising combustion products flowing serially from said rotary vessel through the shelf-transition portion and into said riser duct, said apparatus comprising a supplemental fuel delivery port in said riser duct spaced apart downstream, relative to kiln gas flow, from the transition shelf portion, a fuel delivery tube having a fuel inlet end external to the riser duct and a fuel outlet end spaced apart from the inlet end and communicating with the fuel delivery port, and a solid fuel feed mechanism for advancing solid fuel elements through the fuel delivery tube and the fuel delivery port, the improvement comprising a controller for the feed mechanism for adjusting the rate of advancement of the solid fuel element through the fuel delivery port and into contact with the kiln gas stream.