Device for processing and conditioning of material transported through the device

Reactor tube having an inlet end and an outlet end for treating a fluid flowing through the reactor tube, with a plurality of grid structures arranged in series in the flow direction in the reactor tube for mixing the fluid, wherein each grid structure consists of three sets of parallel partitions which bound flow channels with a flow cross section in the form of a (regular) polygon, and wherein the sets of partitions of adjacent grid structures are offset and/or rotated with respect to one another.