Conveyor dryer and method of operation

Details Conveyor dryer and method of operation Conveyor dryer and method of operation

1981-08-10

1984-04-03

Schwartz, Larry I.

Drying and gas or vapor contact with solids

Apparatus

With means to treat gas or vapor

34 31, 34 34, 34 44, 34 48, 34 54, 34216, 34242, 34 51, F26B 2110

Patent

active

044399308

ABSTRACT:
A dryer for reducing the moisture content of material in sheet form comprising a drying chamber through which material to be dried is conveyed and through which heated air is recirculated being withdrawn from the material exit end thereof at less than atmospheric pressure and returned to the material feed end of the drying chamber by power driven fans. During its return to the material feed end of the drying chamber it is reheated. A supplemental gas chamber is provided at the feed end of the drying chamber for controlling the flow of gas from the material feed end of the drying chamber. A second supplemental gas chamber at the material exit end of the drying chamber has means for limiting the leakage of air at ambient temperature thereinto and is provided with an exhaust fan for withdrawing gas therefrom and in turn from the material exit end of the drying chamber. An instrumentality, preferably a temperature responsive instrumentality, associated with the supplemental gas chamber at the feed end of the drying chamber controls the amount of gas withdrawn from the supplemental gas chamber at the material exit end of the drying chamber and in turn the amount withdrawn from the material exit end of the drying chamber which in turn affects the flow of gas between the material feed end of the drying chamber and the supplemental gas chamber at the material feed end of the drying chamber.

REFERENCES:
patent: 3259995 (1966-07-01), Powischill
patent: 3299533 (1967-01-01), Morris
patent: 4121350 (1978-10-01), Buchholz
patent: 4215489 (1980-08-01), McMahon, Jr.

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