Method and an apparatus for drying bulk material, preferably of

Details Method and an apparatus for drying bulk material, preferably of Method and an apparatus for drying bulk material, preferably of

1988-05-05

1989-10-03

Bennet, Henry A.

Drying and gas or vapor contact with solids

Apparatus

With means to treat gas or vapor

34 74, 34 80, F26B 2106

Patent

active

048707600

ABSTRACT:
A method and an apparatus for drying bulk material, preferably of plastic granules, in a drying hopper by means of dry air, whereby the exhaust air escaping from the drying hopper is dried in a drier containing a humidity adsorption means and fed to the bulk material as dry air. In order to utilize more efficiently the adsorption capacity of the adsorption means and to save thus thermal energy, the invention provides that the exhaust air is cooled by the heat-adsorbing portion of a heat pump before it is fed to the adsorption means. Preferably, a heat-conveying portion of said heat pump is used for preheating the dried air before being fed to the drying hopper for drying the bulk material.

REFERENCES:
patent: 3766660 (1973-10-01), Settlemyer
patent: 3972129 (1976-08-01), Gratt
patent: 4337584 (1982-07-01), Johnson
patent: 4474021 (1984-10-01), Harband

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