NOZZLE BOX OF PLANT FOR DRYING OF FIBROUS MATERIAL CANVAS Russian patent published in 2000 - IPC

FIELD: fibrous material canvas drying plant. SUBSTANCE: nozzle box has mainly a horizontal upper wall provided with round holes and so-called "eyelid-like" perforations, each having a slot directed in parallel with the central axial line of the box upper wall, and a recess made in the box upper wall close to one side of the mentioned slot. The eyelid-like perforations are arranged in two rows in parallel with the central axial line and together they form a zigzag pattern relative to the central axial line, which intersects the recesses of the eyelid-like perforations in both rows. The holes are arranged in the first and second pair of rows; both rows in each pair are arranged on each side and at the same distance from the central axial line. The nozzle box upper wall has a slightly curved arched shape over the entire length in the transverse direction. EFFECT: improved heat transfer, enhanced efficiency of drying. 4 cl, 6 dwg