The present invention relates to a multiple product belt drier comprising a first air permeable conveyor belt (2) on which the materials to be dried are poured to form a first drying path; at least a second air permeable conveyor belt (3) to assure at least a second drying path for drying the materials (M3) after the first one; air blowing means (10); air heating means (14) for heating the blown air to dry the materials, and a drying air distribution circuit for distributing the drying air towards the materials and the belts; the drying air circuit being provided so that the drying air circulates downwards (D) through the materials to be dried and the belts, and air reheating means (15) are provided between the two paths to reheat the air which has passed through the layer of materials on the first belt (2), before it passes through the layer of materials on the second belt (3).
F26B 3/06 - Drying solid materials or objects by processes involving the application of heat by convection, i.e. heat being conveyed from a heat source to the materials or objects to be dried by a gas or vapour, e.g. air the gas or vapour flowing through the materials or objects to be dried
F26B 17/08 - Machines or apparatus for drying materials in loose, plastic, or fluidised form, e.g. granules, staple fibres, with progressive movement with movement performed by belts carrying the materialsMachines or apparatus for drying materials in loose, plastic, or fluidised form, e.g. granules, staple fibres, with progressive movement with movement performed by belts propelling the materials over stationary surfaces the belts being arranged in a sinuous or zig-zag path
F26B 21/02 - Circulating air or gases in closed cycles, e.g. wholly within the drying enclosure
C02F 11/12 - Treatment of sludgeDevices therefor by de-watering, drying or thickening
F26B 25/00 - Details of general application not covered by group or
patents