FIELD: alumina production. SUBSTANCE: apparatus has evaporators with solution supplying nozzles and solution discharge branch pipes, heat-exchangers, vapor condensing and vacuumizing devices. Evaporators are arranged in cascades. Cooled solution supplying nozzles are mounted at regulated height. Apparatus of such construction allows pure self-evaporation vapor to be produced for further employment for heating liquids colder than cooled solution, and pure condensate to be obtained. EFFECT: increased efficiency, simplified construction and enhanced reliability in operation. 2 cl, 1 dwg
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