Drying and gas or vapor contact with solids – Apparatus – Rotary drums or receptacles
Patent
1977-11-18
1980-03-18
Makay, Albert J.
Drying and gas or vapor contact with solids
Apparatus
Rotary drums or receptacles
34136, 432105, 432118, 366225, F26B 1104
Patent
active
041932080
ABSTRACT:
The rotatable dryer drum in a dehydrator for crop material is provided with a plurality of centrally disposed flighting panels for escalating turbulence in the material-entraining heated airflow passing through the drum as well as to increase the available heat transfer area, thereby significantly improving the efficiency of the dehydrator. The panels are supported in offset, thermally isolated relation to the sidewall of the drum by a series of elongate struts spaced along the length of the drum and extending between the sidewall and the panels such that the flighting resists thermal warpage and requires only a minimum amount of welding for installation. In preferred forms there is provided a dropout chamber adjacent the drum outlet for collecting material separated from the airflow, the chamber having a mechanical conveyor for bulk discharge of the collected material. A return duct from the outlet of the drum to its inlet adjacent the burner is provided for recycling a portion of the heated airflow thereby reducing fuel requirements for the burner and further increasing the efficiency of the dehydrator.
REFERENCES:
patent: 2959869 (1960-11-01), Ackerman
patent: 3387380 (1968-06-01), Pritts
patent: 3538614 (1968-09-01), Weimer et al.
patent: 3751218 (1973-08-01), Cherenson
patent: 3861055 (1975-01-01), Thompson
patent: 3950861 (1976-04-01), Weimer et al.
Bennett Henry
Makay Albert J.
Ronning Engineering Company Inc.
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