Method and apparatus for separating crops and impurities

Details Method and apparatus for separating crops and impurities Method and apparatus for separating crops and impurities

1997-03-05

1997-12-23

Nguyen, Tuan

Classifying, separating, and assorting solids

Plural, diverse separating operations

Aqueous suspension and stratifying

209173, B03B 560

Patent

active

056999178

ABSTRACT:
A method and an apparatus for separating crops and impurities are described, which exploit the different specific gravities of the materials to be separated. The separation is performed with the help of a liquid exploiting the different lifting forces, since the materials to be separated differ clearly in specific gravity. If the specific gravity of the separating liquid does not suffice to effect the necessary lift for the crop, one produces a flow acting against the sinking direction of the impurities to increase the lifting force for the crop and cause it to collect by floating on the surface of the separating liquid. Water is preferably utilized as a separating liquid, and the flow is produced with the help of a pump wheel or bucket wheel. The method has proven especially useful for separating potatoes and stones.

REFERENCES:
patent: 2698087 (1954-12-01), Call et al.
patent: 2708517 (1955-05-01), Evans
patent: 3547554 (1970-12-01), Willette
patent: 3722035 (1973-03-01), Hanks
patent: 3773432 (1973-11-01), Chow et al.
patent: 4259179 (1981-03-01), Marvin
patent: 4830188 (1989-05-01), Hannigan et al.
patent: 4858769 (1989-08-01), DeVries
Official communication issued by German Patent Office for DE P 44 29 868.4 (dated Nov. 7, 1994).

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