Fluidized bed boiler set and method of burning at least two types of fuel in a fluidized bed boiler

Abstract

A fluidized bed boiler assembly (1) comprises: - a fluidized bed boiler (1) comprising a combustion chamber, - a first conveyor (5) for feeding a fuel mixture to the fluidized bed boiler (1) and / or for introducing the fuel mixture into the combustion chamber, a first fuel dispenser (12) and a second fuel dispenser (13), wherein the first outlet of the first dispenser (12) and the first outlet of the second dispenser (13) enter onto or into the first conveyor (5) next to each other or at a distance from each other. During combustion, the second fuel is dispensed by the second dispenser (13) onto or into the first conveyor (5) next to or at a distance from the first fuel supply area and is transported by the first conveyor (5) to the fluidized bed boiler (1), and then the first and second fuel are jointly introduced into the combustion chamber of the fluidized bed boiler (1).