Drying and gas or vapor contact with solids – Process – With treated material recirculation
Patent
1995-12-28
1999-01-26
Naff, David M.
Drying and gas or vapor contact with solids
Process
With treated material recirculation
34 60, 34376, 4352625, 4352831, F26B 700, B09B 300, C12M 100
Patent
active
058626107
ABSTRACT:
Method and apparatus are provided for reprocessing dry pellets made of waste bio-solids in which the pellets and wet sludge waste bio-solids are supplied to the inlet of a material combining conveyor whose angular position can be adjusted. The pellets are coated with the sludge as they travel along the material combining conveyor to its output which feeds a dryer or oven. By adjusting the speed, length and angular position of the material combining conveyor, the amount of sludge coated onto the pellets can be controlled. The material combining conveyor is preferably a sealed shaftless screw conveyor that extends in a generally veritcal direction so that pellets not properly coated fall by gravity to the conveyor inlet. Dry pellets and wet sludge can be supplied from separate bins to a common feed conveyor such as a shaftless screw conveyor which conveys the mixture to the input of the material combining conveyor.
REFERENCES:
patent: 5092453 (1992-03-01), Bruke
patent: 5337496 (1994-08-01), Glorioso
patent: 5557873 (1996-09-01), Lynam et al.
Atara Corporation
Naff David M.
LandOfFree
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