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A method and an apparatus for drying or heat treating granular material fed in a continuous flow. The apparatus comprises a heating container having an inlet end and an outlet end. A heating source is located entirely within the container. An auger conveyor is disposed in the container adjacent the

A method and an apparatus for drying or heat treating granular material fed in a continuous flow. The apparatus comprises a heating container having an inlet end and an outlet end. A heating source is located entirely within the container. An auger conveyor is disposed in the container adjacent the inlet end to displace a particulate medium, capable of retaining heat, from the inlet end to a heat chamber within the container. A transporting mechanism is provided in the heating chamber for showering the particulate medium in direct contact with a flame during a predetermined time so that the medium is quickly heated to an approximate desired temperature. A mixing and drying conveyor mixes and conveys the heated particulate medium with a humid granular material whereby to dry the material by heat transfer between the particulate medium and the granular material. A separator then separates the particulate medium from the granular material. The particulate medium is then recycled while still hot and the dried granular material is recovered.

대표청구항 ▼

A drying apparatus for drying granular material fed thereto in a continuous flow, said apparatus comprising a conical heating drum having an inlet end and an outlet end, heating means in said container, conveying means in said container adjacent said inlet end to displace a particulate medium capabl

A drying apparatus for drying granular material fed thereto in a continuous flow, said apparatus comprising a conical heating drum having an inlet end and an outlet end, heating means in said container, conveying means in said container adjacent said inlet end to displace a particulate medium capable of retaining heat from said inlet end to a heat chamber within said conical heating drum, shower means in said heat chamber for displacing said particulate medium for direct contact with a flame during a predetermined time so that said medium is quickly heated to an approximate desired temperature, a mixing and drying conical drum disposed entirely about said conical heating drum and having an inlet end and outlet end, auger means in said mixing and drying conical drum for conveying said heated particulate medium discharged from said outlet end of said heating drum with a humid granular material introduced at said inlet end of said mixing and drying conical drum, whereby to dry said material by heat transfer between said particulate medium and said granular material, said mixing and drying conical drum having a dryer section and a separator section, said dryer section being disposed in a portion of its inlet end, said separator section being disposed in a portion adjacent its outlet end and having a particulate medium extractor element and a granular material conveyor, an annular cone-shaped trough secured about said drum separator section and rotated therewith, whereby to recycle said particulate medium while still hot, means to recover said dried granular material and drive means drivingly coupled to impart rotation to all said conical drums and conveying means.