Drying and gas or vapor contact with solids – Apparatus – With means to treat gas or vapor
Patent
1992-02-10
1993-06-22
Bennett, Henry A.
Drying and gas or vapor contact with solids
Apparatus
With means to treat gas or vapor
34 62, 34 20, 34131, F26B 700
Patent
active
052207323
ABSTRACT:
A process of cooling sand and rocks enables large amounts of aggregate to be cooled to a desired temperature below ambient aggregate temperature. Such temperature reduction is particularly useful for preparing concrete. Aggregate is introduced into a rotating cylinder, in which the aggregate is slowly mixed and moved. Chilled gas is also introduced into the cylinder, to contact the aggregate particles and reduce the temperature of the aggregate. Chilled gas may be provided by blowing ambient air or gas into contact with a chilled gas or liquid supply, and then directing the chilled gas into the cylinder. The gas may be recirculated in a closed system, to conserve energy and prevent aggregate fines from being lost.
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Bennett Henry A.
Gould Linda F.
Gromada Denise L. F.
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