FIELD: process engineering.
SUBSTANCE: invention relates to rectification. Proposed column comprises, at least, one rectification column wherein water-alcohol mix may be fed for purification. Column top evaporant is used to supply power to re-boiler and, also, to water-spirit mix purification evaporator that converts, at least, one portion of said mix, into steam. Said portion converted into steam is fed via compressor to rectification column as inflow.
EFFECT: optimised use of power, hence, power saving.
18 cl, 1 dwg
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