Drying and gas or vapor contact with solids – Apparatus – With means to treat gas or vapor
Patent
1980-11-17
1982-08-31
Schwartz, Larry I.
Drying and gas or vapor contact with solids
Apparatus
With means to treat gas or vapor
34 33, 34 68, 34129, 34134, 34137, 34 35, 34 86, 432106, F26B 700
Patent
active
043465234
ABSTRACT:
An improved, fuel efficient crop drying system and method is disclosed which makes use of the waste heat from a primary rotary drum dryer in order to predry the crop in a two-pass, indirect heat exchange dryer. The predryer and primary dryer are coupled in a pneumatic (negative pressure) conduit loop so that crop is conveyed in serial order through the dryers. The predryer includes respective, adjacent, two-pass air and crop paths disposed within a tubular shell, and the entire predryer is axially rotated during operation thereof. The ultimate volumetric air discharge from the system is significantly reduced as compared with conventional rotary dryers, and the saturated wet scrubbing which occurs in the predryer displaces a high percentage of particulate matter from the gaseous discharge to the water discharge, thereby reducing atmospheric pollution.
REFERENCES:
patent: 38816 (1863-06-01), Dole et al.
patent: 1358313 (1920-11-01), Hero
patent: 3785063 (1974-01-01), Bishop
patent: 3793741 (1974-02-01), Smith, Jr.
Ronning Engineering Company Inc.
Schwartz Larry I.
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