Grain dryer

Drying and gas or vapor contact with solids – Apparatus – For diverse operations on treated material

Patent

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Details

34 86, 34170, 34174, F26B 700

Patent

active

040867080

ABSTRACT:
A concurrent-countercurrent flow type grain dryer is described having an improved wet grain-hot air contacting arrangement. The dryer includes a wet grain bin having a horizontal floor assembly with a plurality of uniformly spaced openings with a tube member extending downwardly beneath each such opening. These tubes have insulated side walls and serve to deliver wet grain in response to gravity from the bin into a drying chamber. A hot air inlet duct is provided adjacent the tube members to deliver hot air into the space between the tube members and downwardly through a bed of grain in the drying chamber. The bottom of the drying chamber has metering grain outlets as well as cooling air inlet ducts, while air exhaust duct are provided intermediate the hot and cooling air inlets. The novel floor assembly permits the wet grain to be cyclically delivered into the drying chamber with a pulsating action, which causes a lateral flow resulting in uniform layers of wet grain being deposited in the drying chamber, where it comes into contact with the hot air.

REFERENCES:
patent: 2626205 (1953-01-01), Watson
patent: 3112188 (1963-11-01), Zehnder
patent: 3710449 (1973-01-01), Rathbun
patent: 3757427 (1973-09-01), Wilkinson

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