Method and apparatus for drying fibrous material

摘要

A method and apparatus for drying two separate units of moist fibrous material. The method includes the steps of flowing a gaseous medium through both units of material in a closed system in such a way that the gaseous exhaust from one unit is the gaseous intake of the other unit, heating the gaseous medium subsequent to its passage through each unit of material and removing moisture from the gaseous medium after passage through the unit of material. The apparatus includes two closed containers each of which has a support for the material which when having material thereon divides the interior of the container into an outer chamber and an inner chamber, a circulation system serially interconnecting the containers by connecting the inner chambers of the containers to each other and connecting the outer chambers of the containers to each other and containing a pump and a heat exchanger interposed in the system before each container. A condenser also may be included in the system to remove moisture.