Method and reactor for processing of fuels having a wide particle size distribution

A method for processing fuel with a wide particle size distribution, in which the fuel is blown tangentially with an airflow into a swirl chamber (1) having a cylindrical jacket and containing a burning mass, thus creating a vortex, comprising:

• leading an outlet flow of the burning mass out from the center of the swirl chamber;
• arranging the vortex created by the blown fuel-air mixture and by a diameter of the outlet flow to create a selective delay for relatively coarse particles, so that the size of the relatively coarse particles is reduced through mechanical treatment caused by evaporation, pyrolysis, and collision, to become smaller than a desired limit value, before the particles escape from the swirl chamber, and;
• holding the temperature of the cylindrical jacket of the swirl chamber below the melting point of ash from burning of the fuel, and wherein
• the flow of air is divided into at least two stages, in a first stage of which the fuel to be burned is fed to the swirl chamber with a sub-stoichiometric amount of air, and in a subsequent stage of which a secondary airflow is added as a concentric toroidal flow around the outlet flow leaving the swirl chamber.