System for separating and concentrating a liquid component from a liquid multi-component mixture

For separating and concentrating a liquid component from a formed from a plurality of liquid components having different boiling points, liquid multicomponent mixture, such as an ethanol-water mixture a Konzentratorapparat (3) is provided, whose stripping section and rectifying section as mutually separate columns (5, 7) with different levels of operating energy requirements are formed. The column (7) operating with a higher energy demand is designed for a lower temperature difference between the boiling temperature of its column head (29) and the boiling point of its column foot (21) when the column (5) with lower operating energy requirements. The two columns (5, 7) are separate mechanical vapor compressor (15, 27) associated with the compacting and the top vapor of the associated column (5, 7), the operating power via separate serving as a reboiler bottoms evaporator (9, 23) the base region (11 , 21) of the respective column (5, out 7).