PROCÉDÉ DE SÉPARATION DE SUBSTANCES GAZEUSES ET PARTICULAIRES PRÉSENTES DANS UN FLUX DE GAZ AU MOYEN D'UN RÉACTEUR D'ÉCOULEMENT À LIT FLUIDISÉ

摘要

The invention relates to a method for separating gaseous or particulate materials from a gas flow e.g. an exhaust stream, by means of a fluidized bed flow reactor. A support layer consisting of a large particle fraction is arranged in the fluidised bed. In order to constantly maintain the size, a large particle fraction, which leaves the fluidized bed with the volume flow, is separated from the volume flow by a separator and is fed back into the fluidized bed so that the size of the support layer is maintained. The rate of feedback of the large-particle fraction is lowered in terms of mass as the addition of sorbents to the fluidized bed for reducing the residual pollutant concentration is increased. The separated large particle fraction which is not fed back is removed from the process. Said solution also enables the fluidized bed to be supplied with exhaust gas loaded with solid materials from the large particle fraction without a pre-separator. These pass through the fluidized bed and are only then removed from the process.