A device for removing fluids and/or solid substances from a mixture of particulate materials, including • a container forming an annular process chamber having a plurality of cells separated from each other by walls, comprising an inlet cell, intermediate cells, and an outlet cell, • an introduction means for introducing the mixture to be treated into the inlet cell of the process chamber, • a discharge means for discharging the treated mixture from the outlet cell of the process chamber, • a ventilator means (7, 7') for supplying a first fluidizing agent, in particular in the form of overheated steam, from below into the process chamber through an inflow bottom (24, 24', 24", 24"') for generating a fluidized bed within the process chamber, • a heating means for processing the first fluidizing agent in the flow direction in front of the ventilator means (7, 7'), • swirl impellers for conditioning the flow (110 - 160) leading within the container from the process chamber to the heating means and in part to a steam outlet, and • a dedusting means in the flow path between the process chamber and the heating means, wherein dust can be guided to the outlet cell via the dedusting means, characterized in that for supporting a transport of the mixture from the inlet cell to the outlet cell and/or a turbulence of the mixture within the process chamber: • the inflow bottom has first uneven surfaces, and/or • at least temporarily, a second fluidizing agent, in particular in the form of overheated steam, may be fed in at least into the inlet cell substantially in parallel to the inflow bottom by means of first nozzles, and/or • first flow guidance members are provided above the inflow bottom and/or second flow guidance members (501, 502, 503, 600, 700) are provided below the inflow bottom (24, 24', 24", 24'"), wherein the surface of the inflow bottom within the inlet cell is larger than, preferably twice as large as, the respective surface of the inflow bottom of the intermediate cells. • a container forming an annular process chamber having a plurality of cells separated from each other by walls, comprising an inlet cell, intermediate cells, and an outlet cell, • an introduction means for introducing the mixture to be treated into the inlet cell of the process chamber, • a discharge means for discharging the treated mixture from the outlet cell of the process chamber, • a ventilator means (7, 7') for supplying a first fluidizing agent, in particular in the form of overheated steam, from below into the process chamber through an inflow bottom (24, 24', 24", 24"') for generating a fluidized bed within the process chamber, • a heating means for processing the first fluidizing agent in the flow direction in front of the ventilator means (7, 7'), • swirl impellers for conditioning the flow (110 - 160) leading within the container from the process chamber to the heating means and in part to a steam outlet, and • a dedusting means in the flow path between the process chamber and the heating means, wherein dust can be guided to the outlet cell via the dedusting means, • the inflow bottom has first uneven surfaces, and/or • at least temporarily, a second fluidizing agent, in particular in the form of overheated steam, may be fed in at least into the inlet cell substantially in parallel to the inflow bottom by means of first nozzles, and/or • first flow guidance members are provided above the inflow bottom and/or second flow guidance members (501, 502, 503, 600, 700) are provided below the inflow bottom (24, 24', 24", 24'"),