The spreader firing principle is the most widely accepted, proven and user friendly means of burning biomass fuels.  Fine particles of fuel are burned in suspension assisted by the overfire air system. Coarser, heavier fuel is spread evenly on the grate forming a thin, fast-burning fuel bed. The combination of suspension and bed burning makes this method of firing extremely responsive to load demand.

RELIABILITY UNDER VARYING LOAD CONDITIONS:

• Combines advanced spreader stoker technology with automatic ash discharge and water-cooled grates
• Handles a variety of high moisture, low ash fuels over a broad range of steaming capacities with high reliability
• Ideal for high moisture biomass fuels
• The higher combustion air temperature needed to burn high moisture fuels can be maintained without damaging the grates

LOWER EMISSIONS:

• Ability to minimize undergrate/primary airflow reduces excess air
• Higher percentages of overfire/secondary air are utilized for effective staged combustion, an important factor in controlling emissions

LOWER MAINTENANCE COSTS:

• Result from a simple design
• Minimum of moving parts

CONTINUOUS OPERATION:

• Positive automatic ash discharge eliminates shutdowns to clean grates
• The cost of auxiliary fuel to maintain load during grate cleaning is eliminated

RETROFIT APPLICATIONS:

• Inclined or horizontal grate surface
• The need for boiler modification is minimized in retrofit applications where space limitations exist
• Compatible with conventional power boiler designs in terms of grate heat releases 

REDUCED INSTALLATION TIME:

• Shop-assembled in large modules
• Shorter installation schedules on new units
• Quicker turnaround times on retrofits