Tunnel dryer for tile or brick blanks, esp. perforated bricks

摘要

Slide ways (3) spaced apart in height above the tunnel floor (2) are positioned in the drying tunnel (1) through which air is blown in a current contrary to the conveyor direction (T). Conveyor supports (4) belonging to dryer carriages and through which air is blown are conveyed on the slide ways. The two or three transverse rows of blanks on the carriages are conveyed to openings in ventilators (6,7) producing vertical currents of drying air. Each ventilator forms part of several circulating zones (U') or a short circulating circuit (U). A vertical air current (B) is directed to at least one transverse row of blanks. Between an upwards and downwards pointing air current, a zone especially at least one transverse row of blanks, remains without vertical ventilation.