Circulating Fluidized Bed Boilers A Circulating Fluidized Bed (CFB) Boiler is an advanced type of boiler that uses a fluidized bed of solid particles to efficiently burn fuel and generate steam. In a CFB boiler, fuel and inert materials (like sand or ash) are suspended in a high-velocity stream of air, creating a turbulent, fluid-like mixture that enhances heat transfer and combustion efficiency. The particles are continuously circulated between the combustion chamber and a cyclone separator, al