Dryer for bricks, etc., with stationary air blowers - giving rapid drying and consistent products

摘要

Items made of plastic material are dried in an air stream. They are laid out in layers on racks. Air is supplied via a pressurised chamber between each pair of racks. The air is fed at a constant rate at all points of the equipment from stationary press. chambers. Part of the air is recirculated. The addition of warm air is controlled by outlet valves. Esp. used for drying bricks. All the bricks are dried at the same rate to a constant moisture content. The time is cut by 20% compared to conventional methods using mobile air blowers. At the start of the drying only air from the surroundings is used. This is partly recirculated. Later this supply is stopped and warm air is fed. The press. chamber between two racks has openings in its walls facing the racks. At least one fan is placed above each chamber. The racks are in a closed housing and air is removed from the racks on the side opposite the press. chamber. The air is fed to the racks via month pieces arranged regularly over the width and height of the press. chamber walls. A free space is left between the press. chambers and a common air supply. The horizontal cross-sectional area of the press. chamber is at least twice the sum of the areas of the mouth pieces. Flexible vertical walls are suspended between the fans in a press. chamber.