Patent ID: 6098553
Filing Date: 2000-08-08
Classification: F23K

Abstract:
An arrangement for converting a conventional oil boiler having a normal combustion gas exit duct to a boiler that uses moist, granular and solid fuel, said arrangement comprising:a circulating fluidized bed dryer for receiving and drying the moist, granular and solid fuel;a particle separator connected to said dryer for separating solid fuel from combustion gases;a combustion device connected to said particle separator, said combustion device including one of a cyclone burner or a carburetor/gas burner combination;a combustion gas center tap including a second duct fittable into the oil boiler for releasing hot combustion gases from a center chamber of the boiler; anda combustion gas line connecting the normal combustion gas exit duct and the second duct and connected to the dryer to provide drying gases thereto, said combustion gas line having two valves for regulating gas flows from the normal exit duct and the second duct in a desired proportion to adjust the temperature of the mixed gas supplied to the dryer.