Drying and gas or vapor contact with solids – Apparatus – With waste gas heat and/or power conservers
Patent
1986-09-18
1987-05-05
Schwartz, Larry I.
Drying and gas or vapor contact with solids
Apparatus
With waste gas heat and/or power conservers
34191, 34233, F26B 2108
Patent
active
046620834
ABSTRACT:
First and second ported ducts are associated with a drying chamber. A flow control housing has first and second compartments communicating respectively with the first and second ducts. These compartments also have openings which communicate with atmosphere. A fan is employed which draws air from the drying chamber into one of the ducts and through one of the compartments to atmosphere. At the same time a fan on a common shaft draws in make-up air from the atmosphere and forces it through the other of the compartments and into the other duct for discharge into the dryer. The fans are reversible, and the flow control housing is combined with a double acting heat exchanger which extracts heat from exhaust air in one compartment and transfers it to the other compartment for preheating make-up air. A damper is provided in the flow control housing on the atmosphere side thereof for precise control of exhaust and make-up air.
REFERENCES:
patent: Re28226 (1974-11-01), Cook
patent: 1268180 (1918-06-01), Tiemann
patent: 2206858 (1940-07-01), McKee
patent: 2938714 (1960-05-01), Gerrish
patent: 4303122 (1981-12-01), Powell
patent: 4326344 (1982-04-01), Smith
Forests Products Journal, vol. 31, No. 2, Energy Conservation in Wood Dryers Using Vent Air Energy Recovery Devices, Albert C. Kent, Howard N. Rosen and David A. Crotty, pp. 43-49.
Proceedings of the North American Wood Drying Symposium, Mississippi Forest Products Utilization Laboratory, Philip H. Mitchell, pp. 107-129.
Carter John L.
Sprague Michael M.
Eckelman Eugene M.
Schwartz Larry I.
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