| 摘要 |
<p>ROLLER DRYER Apparatus for reducing the moisture content of rigid and/or semi-rigid material in sheet form comprising an elongated generally horizontal stationary housing having material entrance and discharge ends and including a material drying chamber or dryer and a gas seal chamber or section at the material discharge end of the dryer. Material to be dried is conveyed through the dryer and through the seal section on generally horizontal tiered single roll conveyors or on tiered "pinch roll" conveyors extending through the housing. Hot gases are forced under pressure through the dryer from the "wet" end to the "dry" end. The gases are withdrawn from the "dry" end of the dryer and returned through a recirculating duct to the "wet" end of the dryer by a fan adjacent to the "dry" end of the dryer. During return of the drying gases to the entrance end of the dryer the temperature of the gases being circulated is increased. Pressure sensors within the "dry" end of the dryer and within the seal section adjust an exhaust damper in the seal section to maintain predetermined relative pressures of the gases in the adjoining ends of the dryer and the seal section.</p> |
