Patent ID: 9482127
Filing Date: 2016-11-01
CPC Classification: F01N,F23D,F23K,F23L,Y02E

Claim Text:
1. A method for drying pulverized high moisture fuel used to fuel a combustion system equipped with a selective catalytic reduction system; the method comprising: pulverizing, in a mill a high moisture fuel to produce a moist pulverized fuel; heating primary air in an air heater using a first flue gas stream, whereby the first flue gas stream heats the primary air to an increased temperature; heating the primary air from the air heater using a second flue gas stream being a higher temperature than the first flue gas stream, whereby the second flue gas stream further heats the heated primary air from the air heater in a booster air heater to a higher temperature, the second flue gas stream being, a portion of the flue gas exiting an interior chamber of the combustion system prior to passing through a heat exchanger; drying the moist pulverized fuel in a mill using the higher temperature primary air from the booster air heater to produce a dry pulverized fuel; and feeding the dry pulverized fuel from the mill to a combustion furnace.