DISTILLATION APPARATUS AND DISTILLATION METHOD USING THE SAME

PROBLEM TO BE SOLVED: To sufficiently reduce the energy consumption even when a raw solution contains >=20 wt.% of a low boiling point component obtained as a distillate. SOLUTION: The distillation apparatus has a column body 10a, a partition 22 with which the column body 10a is partitioned to form a 1st chamber and a 2nd chamber adjacently to each other, a 1st distillation part 25, a 2nd distillation part 26 formed adjacently to the column top, a 3rd distillation part 27 formed adjacently to the column bottom, a feed nozzle 41, a 1st discharge means for obtaining the distillate, a 2nd discharge means for obtaining side cuts, a 3rd discharge means for obtaining bottoms and a flash means for flashing the raw solution. Even when the raw solution contains >=20 wt.% of the low boiling point component obtained as a distillate, the energy consumption is sufficiently reduced.