ANORDNING ANVENDBAR VID EN FOR TORKNING AV ETT MATERIAL AVSEDD ANLEGGNING

The invention relates to an arrangement in drying sections of the kind intended for drying material (2), in the form of a web, which is arranged for movement through the drying section while supported by a plurality of air streams which impinge on the undersurface of the web and which extend parallel with, or substantially parallel with a plane allotted to the web, each of these air streams being given an exiting velocity and direction, via nozzle-like exit apertures (11, 11a) formed in a blow box (7), such as to maintain the web (2) in a suspended state above the blow box (7). Arranged in that end-part (8) of a blow box through which a flow of supply air (7a) is introduced thereinto is a means (20) operative in reducing and/or eliminating and/or over-compensating the influence of the velocity vector (7a') of the flow of supply air (7a) on the direction in which the air streams exit from the blow box through nozzle-like exit apertures (11, 11a) formed therein and located adjacent the end-part (8) of the blow box.The interior of the blow box is divided into two chambers, a first chamber (71) intended for receiving the incoming flow of supply air (7a) and a second chamber (72) intended for receiving an air flow (7b, 7c) separated from the incoming air flow, this separated air flow having a velocity vector which is considerably smaller than the velocity vector (7a') of the air flow entering the first chamber (71) and preferably having a direction opposite to the firstmentioned velocity vector.