Aggressive convective drying in a conical screw type mixer/dryer

Details Aggressive convective drying in a conical screw type mixer/dryer Aggressive convective drying in a conical screw type mixer/dryer

1996-05-03

1998-01-20

Bennett, Henry A.

Drying and gas or vapor contact with solids

Apparatus

Stationary receptacle or tube with agitator or conveyor

34181, 34183, 34 95, F26B 1112

Patent

active

057090360

ABSTRACT:
The present invention relates to improved drying techniques which increase the capacity and efficiency of agitated pan type dryers. In particular, the present invention relates to a conical screw type mixer/dryer apparatus and method for aggressive convective drying of hard to dry chemical compounds, such as pharmaceuticals. The aggressive drying is brought about by creating turbulence within the drying vessel during the drying cycle. Significant reductions in drying cycle times have been achieved.

REFERENCES:
patent: 299898 (1884-06-01), Wright
patent: 3775863 (1973-12-01), Updegrove
patent: 3946996 (1976-03-01), Gergely
patent: 4160618 (1979-07-01), Sensibar
patent: 4195506 (1980-04-01), Sato et al.
patent: 4481721 (1984-11-01), Graff
patent: 5230164 (1993-07-01), Kishi

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