Drying and gas or vapor contact with solids – Apparatus – For diverse operations on treated material
Patent
1980-09-05
1982-07-06
Schwartz, Larry I.
Drying and gas or vapor contact with solids
Apparatus
For diverse operations on treated material
34 77, 34169, 34174, F26B 1714
Patent
active
043375847
ABSTRACT:
Structure is provided defining a flow path for granular materials to be dried and laterally through which drying air may be passed. The flow path includes inlet and outlet end portions and supply means is provided for supplying granular material to the inlet end portion and discharge means is provided for discharging granular material from the outlet end portion. Air passage structure is provided including means for passing heated drying air laterally through the inlet end portion of the flow path and cooled drying air laterally through the outlet end portion of the flow path. The air passage structure includes a substantially closed loop circuit and pump structure for pumping air through the circuit. Also, the air passage structure includes heating structure for heating the drying air immediately prior to its passage laterally through the inlet end portion of the flow path and cooling structure for cooling and dehumidifying the drying air after its passage laterally through the inlet end portion of the flow path and prior to its passage laterally through the outlet end portion of the flow path. Still further, the air passage structure includes bypass structure operative to cause variable amounts of the drying air within the circuit to bypass the outlet end portion of the material flow path. Further, structure is provided to obtain and maintain sub-atmospheric pressure in the drying chamber.
REFERENCES:
patent: 1502858 (1924-07-01), Little, Jr.
patent: 1711574 (1929-05-01), Miller
patent: 3875683 (1975-04-01), Waters
patent: 4134216 (1979-01-01), Stevens
patent: 4205456 (1980-06-01), Ayers et al.
patent: 4257169 (1981-03-01), Pierce
patent: 4289481 (1981-09-01), Yano
Jacobson Harvey B.
Schwartz Larry I.
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