A method for the aftertreatment of at least gases downstream of a fluidized bed gasification process, downstream of an HTW gasifier (1) of a pressure-loaded fluidized bed gasification process, comprising a particle separation process (11) which is configured to be arranged downstream of the HTW gasifier (1) of the fluidized bed gasification process and upstream of a gas cooler (3) that is configured to be used for the further aftertreatment of the gases, wherein particle separation (11) is carried out by means of a cyclone candle filter unit;
- characterized in that gas from the fluidized bed gasification process is subjected to intermediate cooling (12) directly upstream from the particle separation process (11) and directly downstream of the HTW gasifier (1) of the fluidized bed gasification process, combined with a return of gasification steam (B) from the intermediate cooling back to the fluidized bed gasification process;
- and
- wherein the intermediate cooling occurs to approximately 650° C.