METHOD AND APPARATUS FOR MANUFACTURING SALT

PROBLEM TO BE SOLVED: To provide a method and an apparatus for manufacturing salt having the same quality as that manufactured by sun-drying in a short time at a low cost in the same way as industrially manufactured by an ion-exchange membrane method or the like. SOLUTION: The salt is manufactured b...

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Hauptverfasser:	ENOMOTO KEIICHI, TAMOTO HISASHI, IZUI YASUHISA, MATSUMOTO TAISUKE, YOKOGAWA AKIRA
Format:	Patent
Sprache:	eng
Schlagworte:	CHEMISTRY COMPOUNDS OF ALKALI METALS, i.e. LITHIUM, SODIUM, POTASSIUM,RUBIDIUM, CAESIUM, OR FRANCIUM FOODS OR FOODSTUFFS FOODS, FOODSTUFFS, OR NON-ALCOHOLIC BEVERAGES, NOT COVERED BYSUBCLASSES A23B - A23J HUMAN NECESSITIES INORGANIC CHEMISTRY METALLURGY PRESERVATION OF FOODS OR FOODSTUFFS, IN GENERAL THEIR PREPARATION OR TREATMENT, e.g. COOKING, MODIFICATION OFNUTRITIVE QUALITIES, PHYSICAL TREATMENT THEIR TREATMENT, NOT COVERED BY OTHER CLASSES
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Beschreibung
Zusammenfassung:	PROBLEM TO BE SOLVED: To provide a method and an apparatus for manufacturing salt having the same quality as that manufactured by sun-drying in a short time at a low cost in the same way as industrially manufactured by an ion-exchange membrane method or the like. SOLUTION: The salt is manufactured by heating seawater at a temperature ≤80°C under a reduced pressure to concentrate by 8-10 times, separating its solid part and liquid part, further concentrating the liquid part by 2-3 times, and then depositing the salt. The apparatus for manufacturing salt is equipped with a concentrating apparatus to concentrate seawater, which comprises a concentration tank to accommodate seawater, a decompressing means to decompress the concentration tank, a stirring means to stir the seawater in the concentration tank, and a heating means to heat the seawater in the concentration tank. The heating means comprises a water tube installed in the concentration tank, a pump to circulate a liquid in the water tube, and a heater to heat the liquid in the water tube. COPYRIGHT: (C)2005,JPO&NCIPI