Feed Shelf Firing
For Preheater & Precalciner Kilns, AFS Technology provides automated fuel feed systems that introduce Whole Tires and other Bulk Fuels to the feed shelf for staged combustion. The fuel is gravity-fed in an environment designed to maintain negative pressure and minimize the introduction of outside air for optimal NOx reduction potential.
KILN TYPES: 4-Stage Preheaters; Precalciners
FUEL SPECIFICATIONS: Whole scrap tires up to 48″ in diameter.
FUEL FEED RATE: Standard ten-second gate-release interval designed up to feed 6 tires per minute, adjustable through PLC and/or Control Room Interface.
FUEL SUBSTITUTION RATE(S):
- 4-Stage Preheaters: 20% whole tires; 30% with Mixing Air
- Precalciners: 5% whole tires fired on feed shelf; up to 30% when supplemented or replaced with Suspension Burning in calciner or riser duct.
NOx REDUCTION POTENTIAL: Up to 40% using whole tires; may exceed 50% using whole tires + Mixing Air