Drying and gas or vapor contact with solids – Apparatus – Chamber seals
Patent
1978-07-17
1980-08-05
Makay, Albert J.
Drying and gas or vapor contact with solids
Apparatus
Chamber seals
34 66, F26B 2500
Patent
active
042154898
ABSTRACT:
An elongated generally horizontal stationary housing having generally horizontal, continuous conveyors extending therethrough and including a material drying zone or chamber for reducing the moisture content of material conveyed therethrough and a gas seal zone or chamber having an exhaust fan connected thereto at the material discharge end of the drying chamber. Hot gases are circulated through the drying chamber from the material entrance end to the material exit end of the drying chamber by a fan located in a recirculating duct connected to the opposite ends of the drying chamber and which fan maintains a subatmospheric pressure in the material exit end of the drying chamber. During return of the drying gases to the material entrance end of the drying chamber the temperature of the gases being circulated is increased. Baffles are provided at the material exit end of the seal chamber to restrict the entrance of air into the seal chamber at the material exit end thereof. The gas exhaust fan connected to the seal chamber maintains predetermined relative gas pressures in the adjoining ends of the drying chamber and the seal chamber such that the subatmospheric gas pressure in the seal chamber is never greater than and preferably less than the subatmospheric gas pressure in the material discharge end of the drying chamber.
REFERENCES:
patent: 2443443 (1948-06-01), Chavannes
patent: 2810662 (1957-10-01), Barnebey
patent: 2890878 (1959-06-01), Steinherz
patent: 3032890 (1962-05-01), Brick et al.
patent: 3234661 (1966-02-01), Nerge
patent: 3299533 (1967-01-01), Morris
patent: 3460359 (1969-08-01), Schiffer
patent: 4026037 (1977-05-01), Buchholz
Joyce Harold
Makay Albert J.
The Coe Manufacturing Company
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