Precalciner Fuel Systems

Precalciner Fuel Systems

Typically, the maximum fuel substitution for whole tires introduced on or falling to the feed shelf in Precalciner Kilns is less than 5%. Above this rate, the sulfur cycle volatilization in the kiln is too high to maintain stable operation without a significant loss in production.

To raise tire fuel substitution rates while maintaining process control, AFS Technology has designed two systems which use the concept of Suspension Burning to enable complete combusion of tires above the feed shelf – allowing for higher substitution rates and greater process control:

 

TIRE SKEWER SUSPENSION BURNING

New patented technology from AFS is designed to maximize the benefits of whole-tire Suspension Burning in high gas velocities.

  • Whole tire feed rate up to 3 tons per hour, per burner.
  • Complete combustion in suspension controls sulfur buildup.
  • Burn in riser duct for NOx reduction.

System Specifications

 

Rack-Style Suspension Burning

Rack-Style Suspension Burning is designed to burn whole tires above the feed shelf in a low gas velocity environment.

  • Whole tire feed rate up to 1.5 tons per hour, per burner.
  • Complete combustion in suspension controls sulfur buildup.

System Specifications

 

Feed Shelf Firing

A Double Gate Airlock Valve is the most commonly used method for dropping whole tires onto the feed shelf to burn in the kiln.

  • Whole tire feed rate up to 6 tons per hour..
  • Burns in reducing zone for NOx reduction benefit.

System Specifications