Plastic resin drying apparatus and method

Details Plastic resin drying apparatus and method Plastic resin drying apparatus and method

1991-04-30

1992-12-22

Bennet, Henry A.

Drying and gas or vapor contact with solids

Apparatus

With means to treat gas or vapor

34 72, 34 80, F26B 300

Patent

active

051724898

ABSTRACT:
Apparatus for drying plastic resin particles comprises a container, such as a hopper, for holding the resin particles to be dried and a first closed airflow loop communicating with the container for passing a heated airstream through the container to heat the particles and remove moisture therefrom. The heated airstream becomes moist and is returned to a plenum. A second closed airflow loop communicates with the plenum for receiving a portion of the moist return air under the control of an adjustable by-pass valve in the plenum. The second airflow loop includes a desiccant dryer communicating with the first airflow loop so that air dried by the desiccant dryer is mixed with moist air from the plenum for heating and return to the container.

REFERENCES:
patent: 4918837 (1990-04-01), Graff
patent: 4974337 (1990-12-01), Tavakoli et al.

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