36 leading to condenser 37 where the vapors are condensed to a liquid which is withdrawn through line 41 as the desired product condenser 37 is cooled by cold water entering via line 39 and leaving as warm water via line 40 preheater 28 is connected to line 36 at 38 through line 31 to equilibrate pressure in the preheater 28 and the column section 33 spent cooling water in line 40 distilled mash in line 35 and condensate from 30 are rejected for further treatment and or disposal as waste the details of column section 33 may be seen in fig2 4 column 33 is comprised of a zigzag ribbon channel 10 which is totally enclosed except for entrances and exits at the top 43 and at the bottom 42 at the top 43 there is an exit 18 for vapors leaving channel 10 and an entrance 19 for mash to be fed into channel 10 at bottom 42 there is an entrance 17 for steam to be fed into channel 10 and an exit 20 for mash to leave channel 10 as shown in fig3 and 4 the top manifold 14 is a passageway to accommodate lines 18 and 19 and connect them to channel 10 similarly bottom manifold 15 is a passageway to connect channel 10 to lines 17 and 20 channel 10 between manifolds 14 and 15 is formed by joining a plurality of angle beams having an.