| 摘要 |
1,137,676. Concentrating liquids by freezing. UNITED KINGDOM ATOMIC ENERGY AUTHORITY. 21 Dec., 1966 [7 Jan., 19661, No. 760/66. Heading F4H. In a process for concentrating brine, fruit juices &c. and for producing potable water, a slurry of ice crystals and mother liquor is passed from a freezer 6 to a classifier 11 from which a large crystal size ice fraction is passed to a separator 13, a medium crystal size ice fraction is passed via a crusher 15 to the freezer 6 and a small crystal size fraction is passed to the mother liquor input line 3 so as to cool and be melted by the mother liquor. As illustrated, the freezer is a direct contact cooler through which liquid butane is circulated by a compressor 9. Propane may be used if a solid hydrate is required. Mother liquor is withdrawn from the separator 13 through a pipe 18 and is in part recirculated to the freezer and in part rejected via a heat exchanger 2. Product ice from the separator passes to a melter 23 and fresh water from the melter is in part returned to the separator as wash water and in part withdrawn through a product pipe 21. The freezer may be of the form disclosed in Specification 1,111,933. |
