Drying and gas or vapor contact with solids – Apparatus – With means to treat gas or vapor
Patent
1986-03-21
1987-08-25
Schwartz, Larry I.
Drying and gas or vapor contact with solids
Apparatus
With means to treat gas or vapor
34 46, 34 54, F26B 306, F26B 2112
Patent
active
046883320
ABSTRACT:
A method and apparatus for the controlled aeration of stored grain is disclosed that provides for aeration of grain when ambient temperature and relative humidity levels are within a specified range of optimum levels. Available daily aeration time is calculated based on the difference between grain temperature and recent average air temperature and, if not used in a given day, is accumulated. Aeration of grain is initiated when the current ambient air temperature is within an acceptable range of the recent average air temperature, the equilibrium moisture content supported by the current air temperature and relative humidity levels is within an acceptable range of the desired grain moisture content and the available aeration time has not been used up. Long periods between aeration are avoided by progressively widening the range of acceptable current ambient air temperature and equilibrium moisture content levels when less than a predetermined amount of aeration has occurred. The method also provides for the maintenance of a uniform temperature within the stored grain, and assists in avoiding extreme storage temperatures. The apparatus disclosed provides for continuous monitoring of ambient atmospheric conditions, and initiates aeration of stored grain automatically, in accordance with the inventive method, without continuous operator involvement.
REFERENCES:
patent: 3408747 (1968-11-01), Steffen
patent: 3563460 (1971-02-01), Nine
patent: 4045878 (1977-09-01), Steffen
patent: 4175418 (1979-11-01), Steffen et al.
patent: 4471424 (1984-09-01), Persson
patent: 4522335 (1985-06-01), Kallestad et al.
patent: 4583300 (1966-04-01), Mast
Natural Air and Low Heat Grain Drying and Storage Controller, Duane L. Bollwitt (The Bollwitt Co., Inc.), Jan. 25, 1983, Monitcello, Iowa.
Programmable Control for Drying and Aeration, Gleelyn W. Persson (Pertek, Inc.), Robert W. Churchill (Hatrun Corporation), date and place of publication unknown.
Pertek, Inc. 2 page sales brochure, author, date and place of publication unknown.
Kallestad Daniel R.
Satre Kenneth I.
Schwartz Larry I.
Sentry Technologies, Inc.
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