| 摘要 |
The invention relates to a crystallization apparatus and to a method for crystallizing a liquid from a solution, a mixture of liquids or a suspension. Th e apparatus comprises a growth zone in a vertically positioned tank, which growth zone is po sitioned below a nucleation zone. Via a delivery line the seed crystals are fed from the nucleation zone to the bottom end of the growth zone. In the growth zone the ice slurry slo wly moves in a vertical direction at such a low velocity heavier particles are able to precipitate and to be discharged at the bottom end. Preferentially, the nucleati on zone comprises a vacuum apparatus for effecting a reduction in pressure in the nuclea tion zone to between 10-4 and 7-10-3 bar. Using the apparatus according to the presen t invention it is possible for waste water and effluent to be concentrated in a si mple manner, clogging of, for example, filters owing to the settling of solid particl es being prevented.
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