Method of fluid component separation by crystallization, and cry

Details Method of fluid component separation by crystallization, and cry Method of fluid component separation by crystallization, and cry

1986-09-29

1988-10-11

Capossela, Ronald C.

Refrigeration

Separator for solidified constituent of liquid mixture

62527, 62532, 138 38, 165177, B01D 904, C02F 122

Patent

active

047761776

ABSTRACT:
In the tube (41) of a tube assembly of a crystallization apparatus, an insert (43) is provided which increases the effective surface in the interior of the tube (41). The insert has subsequent different sections (45, 46, 47). Seen in direction of flow the effective surface per unit of length of a subsequent section (46, 47) is larger than the effective surface of the previous section (45, 46). Because the heat removal by the coolant is a limiting factor for the kinetics of crystallization, the amount of crystals produced per unit of length of the tube is not substantially increased by the insert, but a smaller linear growth velocity is obtained at the surface of the crystals. This provides for better conditions for forming clean crystals. The inserts (343, 443 . . . 1243), preferably, are longitudinal sheet elements, for example of star, corrugated ring or similar shape which, in turn, may be formed with fine corrugations or pleats and/or perforations (54), of stainless sheet steel or, if attacked by the liquid flowing through the apparatus, graphite or polyvinylchloride, for example.

REFERENCES:
patent: 2874199 (1959-02-01), Tarr
patent: 3528786 (1970-09-01), Satterwhite et al.
patent: 3621664 (1968-04-01), Saxer
patent: 3891394 (1975-05-01), Smith
Brochure-Sulzer-MWB Crystallization Process for Solution of Separation Problems, Switzerland, 1/1988.

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