Concentrating evaporators – Film type – Moving-film support
Patent
1984-01-24
1985-10-08
Richman, Barry S.
Concentrating evaporators
Film type
Moving-film support
202236, B01D 122
Patent
active
045458537
ABSTRACT:
A film evaporator is made up of a central shaft with conical surface elements fixed on it, each of which has a conically convex side and a conically concave side, said conical surface elements walling off an evaporation space. There is a means for running a product feed to limits of inner openings in the rotating conical surface elements so that same may be spread out from said limits in the form of a film and after heating by said heat vehicle may be run off out of the evaporator as a concentrate. The outer faces of the surface elements are heated by a heat vehicle. To make certain that the film of product is kept unbroken on its way through the apparatus there are tubelets with a small diameter running out radially from the outer limits of the surface elements. At their inner limits the tubelets each have an inner diameter such that the sum of the inner circumferences of all the tubelets on a given surface element is equal to the circumference of the surface element in question at its outer limit.
This design makes it possible for the evaporation area of a given amount of film to be kept the same as the film is moved from the ends of the tubelets that are joined with the surface element to the outlets thereof so that there is no chance of the film being broken as it makes its way through the tubelets.
REFERENCES:
patent: 1250427 (1917-12-01), Campbell
patent: 2033215 (1936-03-01), Whitmore
patent: 2275117 (1942-03-01), Vogel-Jorgensen
patent: 2601600 (1952-06-01), De Witt
patent: 3960991 (1976-06-01), Schmitt et al.
patent: 4167454 (1979-09-01), Feres
patent: 4255232 (1981-03-01), Ries
patent: 4339398 (1982-07-01), Feres
Donofrio John
Richman Barry S.
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