Solvent distillation unit with adjustable scrapers

Details Solvent distillation unit with adjustable scrapers Solvent distillation unit with adjustable scrapers

1984-06-25

1985-09-10

Bashore, S. Leon

Distillation: apparatus

Apparatus

Systems

202236, 159 62, 159 252, 196122, 196123, B01D 2114, B01D 2122

Patent

active

045404712

ABSTRACT:
A solvent reclaiming unit has a still for distillation of contaminated solvents to recover clean solvent from the solvent vapor. The still has a tapered or conical bottom heat exchange surface surrounded by a heat source. The still has scrapers which wipe the heat exchange surface to prevent scaling of the heat exchange surface. The scrapers are driven during the distillation process by an external motor and reducer. The contact of the scrapers with the heat exchange surface is adjustable from outside of the still to maintain wiping contact. The wiping portion or blades of the scrapers may be formed of brass or other soft material attached to a harder material, such as a spring stainless steel. A safety stop is provided in the interior of the vessel so that the blades may not be adjusted to the point that the harder steel comes in contact with the heat exchange surface.

REFERENCES:
patent: 2255059 (1941-09-01), Houdry
patent: 2554546 (1951-05-01), Zahm
patent: 2678093 (1954-05-01), Fischer
patent: 2955990 (1960-10-01), Smith
patent: 3054729 (1962-09-01), Smith
patent: 3316958 (1967-05-01), Johnston
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patent: 3483092 (1969-12-01), Young
patent: 3486984 (1969-12-01), Sperry
patent: 3522016 (1970-07-01), Groves et al.
patent: 3621506 (1971-11-01), Armstrong et al.
patent: 3739710 (1973-06-01), Costa et al.
patent: 4095307 (1978-06-01), Brubaker
Renzmann, "Destillieranlage Typ Roto", West Germany, pp. 1-4.

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