Crystallizing apparatus

Details Crystallizing apparatus Crystallizing apparatus

1982-04-01

1984-04-17

Lacey, David L.

Chemical apparatus and process disinfecting, deodorizing, preser

Chemical reactor

Including specific material of construction

422254, 156603, 156DIG88, B01D 900, C30B 1530, C30B 3500

Patent

active

044434120

ABSTRACT:
A crystallizing apparatus particularly for use with undercooled melts. Crystallizing is effected on the cooling conveyor belt in a thick layer. A precrystallizer comprises at least two rolls arranged above the cooling conveyor and rotating in the same direction. A shear gap is formed between the at least two rolls. A melt is applied to an uppermost one of the at least two rolls in a thin layer. In the course of the path followed by the melt over the at least two rolls, shearing forces are generated within the area of the shear gap, which enhance the nucleation. A further enhancement of nucleation is obtained by cooling the at least two rolls, so that relatively large volumes of the melt may be crystallized per unit time in the crystallizing apparatus without the need for the addition of supplemental seed crystals to the melt. The amount of melt in the precrystallizer is very small.

REFERENCES:
patent: 2651922 (1953-09-01), Graham
patent: 2665973 (1954-01-01), Morningstar et al.
patent: 3147085 (1964-09-01), Gatti
patent: 4323419 (1982-04-01), Wakefield

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