| 摘要 |
Thermal spring waters are degassed; carbonates are separated and their mineral salt content is concentrated by removal of water. Characteristically degassing dissolved gases as CO 2takes place by physical means preferably by spray and heat treatment. Thermal waters freed from their carbonate contents are concentrated by heat-transmission, so that at least 60%, preferably 80-90%, of water is removed and the high mineral salt containing product is presented as a fluid concentrate. An installation for this purpose comprises a degassing, a carbonate separating unit and a device suitable for concentration of the medicinal mineral salt contents. The installation has a degassing unit, a carbonates separating unit and a device suitable for concentration of the medicinal-mineral salt content. Typically, it contains a pre-degassing unit (2), a settling facility and a post-degassing unit (4). The concentration unit is devised to have a condenser (6) complete with a tank equipped with heaters. An iron removing prefilter (5) is installed between the condenser (6) and the post-degassing unit (4). The condenser is followed by a (post)-filter (7) for removal of compounds separated during heat treatment. Optionally a UV filter is also installed for sterilisation. |
