VACUUM EVAPORATION TYPE DISTILLATION EQUIPMENT

摘要

PROBLEM TO BE SOLVED: To heat/sterilize the inside of distillation equipment by making good use of a heat source supplied to the distillation equipment.

SOLUTION: This vacuum evaporation type distillation equipment is provided with an evaporation unit 11 having a plurality of evaporators which are connected to one another in a multiple effect manner, in the first one of which a heat source and a raw water 25 are supplied and the raw water 25 is heated by the heat source 23 and in each of which evaporation/condensation is repeated successively, a condenser 12 for cooling/condensing the steam evaporated in the final evaporator of the unit 11 and an evacuating means 15 for keeping the inside of the unit 11 below atmospheric pressure. Distilled water 26 and impurity-concentrated water 27 are obtained by repeating evaporation/condensation of the water 25 in the unit 11 decompressed by the means 15. A heating/sterilizing means is arranged for heating/sterilizing this evaporation type distillation equipment by the source 23 by reducing or nulling the amount of cooling water 24 to be supplied to the condenser 12 by a cooling water volume regulating valve 22 to reduce or null the amount of the steam to be condensed in the condenser 12.

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