Rotary fluidized bed combustion system

A method for burning fuel in the form of solid particles in a rotary fluidized bed combustion system comprising the steps of:

• introducing solid fuel in particulate form;
• introducing air for burning said fuel;
• enclosing by and containing within walls the mixture of air and fuel thus introduced in a combustion region where fuel and air chemically interact (burning process) in a fluidized bed generated by the manner in which the air and the fuel are introduced in the combustion region;
• generating an artificial gravity field substantially stronger than the earth gravitational field, said artificial gravity field being created by rotating the air/fuel mixture around an axis substantially orthogonal to the general direction followed by the combusted gases on their way out of the combustion region;
• preventing the fuel particles from contacting the walls surrounding the fuel burning process by means of balancing the centrifugal forces acting on the particles and caused by the artificially created gravity field against the opposing aerodynamic forces also acting on the particles and which are caused by the means for introducing some of the air for burning the fuel;
• segregating the fuel burning along the path followed by the particles as they burn and proceed toward the combustion system exhaust, and away from the walls around said combustion region;
• elongating the pathway generally followed by the particles during the burning process, thereby increasing their residence time in the combustion region until their burning is generally completed before the particles leave the combustion system;
• and
• exhausting the combusted gases.