F - Mech Eng,Light,Heat,Weapons – 26 – B
Patent
F - Mech Eng,Light,Heat,Weapons
26
B
34/30
F26B 3/04 (2006.01) F26B 17/12 (2006.01)
Patent
CA 1148736
ABSTRACT OF THE DISCLOSURE A grain drying and conditioning apparatus is provided herein having a housing with an outer pervious skin with impervious end walls, air inlet, grain inlet, grain outlet and air exhaust duct structures con- nected thereto has air pervious walls which are spaced within the struc- ture for confining a column of grain to be dried, the grain passing by gravity from the grain inlet to the grain outlet, with the grain being dried by air as the grain moves downwardly. A blower and heater mechanism is also connected to the housing for causing heated air to be forced through a first zone of the column of grain in one direction to heat and extract moisture therefrom and simultaneously causing air for cooling the grain to be pulled through a second zone of the grain column in an opposite direction or be pushed in the same direction as the flow of the heated air. A plenum chamber is formed between the innermost of the pervious walls and the blower and the air duct structure and an adjustable plenum divider mechanism is provided between the innermost of the walls and the air duct structure in the plenum chamber for selectively dividing the plenum chamber into a first and a second section for the purpose of optimizing the heating and cooling of the grain in the first and second zones, or for combining both zones of the plenum chamber to optimize the entire structure for heated air drying. Air recycling structure and specific air control de- vices for regulating the volume of exhaust air versus recycled air in the exhaust area of the dryer is provided for blending unsaturated exhaust heated air which was forced through the lower portion of the first zone or drying zone of the grain column area by pressure with incoming cooling air drawn through the second zone or cooling zone of the grain column area by suction to save the energy in such heated air. Means are provided for selectively directly connecting the second zone of the plenum chamber to the inlet of the air circulation means for causing ambient air to be drawn through a second portion of the air flow means for cooling the grain when the connecting means is open and causing the air in the second zone to be forced through the second portion of the grain when the connecting means is closed.
362887
Lynch Gregory A.
Noyes Ronald T.
Williams Eugene E.
Beard Industries Inc.
Borden Ladner Gervais Llp
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