In more recently built sugar mills, bagasse is burned in spreader stoker boilers. Bagasse fed to
these boilers enters the furnace through a fuel chute and is spread pneumatically or mechanically
across the furnace, where part of the fuel burns while in suspension. Simultaneously, large pieces of
fuel are spread in a thin, even bed on a stationary or moving grate. The flame over the grate radiates
heat back to the fuel to aid combustion. The combustion area of the furnace is lined with heat
exchange tubes (waterwalls).