Drying and gas or vapor contact with solids – Apparatus – With means to treat gas or vapor
Patent
1977-08-04
1980-02-26
Padgett, Benjamin R.
Drying and gas or vapor contact with solids
Apparatus
With means to treat gas or vapor
34 80, 34 93, 126433, 126934, 126435, F26B 300
Patent
active
041898486
ABSTRACT:
This invention relates to the use of desiccants in conjunction with an open oop drying cycle and a closed loop drying cycle to reclaim the energy expended in vaporizing moisture in harvested crops. In the closed loop cycle, the drying air is brought into contact with a desiccant after it exits the crop drying bin. Water vapor in the moist air is absorbed by the desiccant, thus reducing the relative humidity of the air. The air is then heated by the used desiccant and returned to the crop bin. During the open loop drying cycle the used desiccant is heated (either fossil or solar energy heat sources may be used) and regenerated at high temperature, driving water vapor from the desiccant. This water vapor is condensed and used to preheat the dilute (wet) desiccant before heat is added from the external source (fossil or solar). The latent heat of vaporization of the moisture removed from the desiccant is reclaimed in this manner. The sensible heat of the regenerated desiccant is utilized in the open loop drying cycle. Also, closed cycle operation implies that no net energy is expended in heating drying air.
REFERENCES:
patent: 3585379 (1971-06-01), Yamamoto et al.
patent: 3972129 (1976-08-01), Graff
patent: 4125946 (1978-11-01), Prager
patent: 4148147 (1979-04-01), Steffen
Grodzka Philomena G.
Ko Suk M.
McCormick Paul O.
Barr J. L.
Deckelmann Louis M.
Lupo R. V.
Padgett Benjamin R.
Poteat Robert M.
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