Drying and gas or vapor contact with solids – Process – With fluid current conveying or suspension of treated material
Patent
1994-03-10
1995-08-15
Gromada, Denise L.
Drying and gas or vapor contact with solids
Process
With fluid current conveying or suspension of treated material
34370, 34589, 34169, 16510416, F26B 308
Patent
active
054408237
ABSTRACT:
A flowable solid material, such as wet-milled corn germ, is continuously fed into the upper portion of a large vessel having a cylindrical shell with a vertical axis and a series of vertically spaced horizontal decks. Each deck has concentrically spaced annular zones of holes or perforations, and heated air from a set of blowers and a gas-fired or steam heat exchanger is forced countercurrently or upwardly through the perforations to produce a recirculating bed of material above each deck with an upward spouting flow of the material above the zones of perforations and a downward flow of material between the zones of perforations. The recirculating material forming the lower beds is also heated by cylindrical steam heat exchangers which extend vertically between the zones of perforations, and the material is fed progressively downwardly through the vessel to form the beds and for discharge from the lowermost bed. Sweep arms rotate above the decks and below the heat exchangers, and after the heated air flowing upwardly through the decks and beds absorbs moisture from the material, the air is exhausted to a dual cyclone separator. The separator collects solid particles within the exhaust air, and the clean exhaust air is directed from the separator back to the blowers to form a closed cycle operation. The apparatus may also be used for cooling, treating or burning a flowable solid material.
REFERENCES:
patent: 3287823 (1963-11-01), Vidali
patent: 3771237 (1973-11-01), Hansen et al.
patent: 3876383 (1975-04-01), Vandenhoeck
patent: 4323312 (1982-04-01), Glatt et al.
patent: 4702892 (1987-10-01), Betz
1989 Publication of FRENCH.RTM. Dryer/Cooler System.
1980 Publication of G. M. Rios et al entitled "Potential Improvements In The Field Of Large Particle Fluidization".
Gromada Denise L.
The French Oil Mill Machinery Company
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