| 摘要 |
PROBLEM TO BE SOLVED: To provide a distillation column capable of improving distillation performance by keeping a distillation column body at the optimum temperature without using artificial technology.SOLUTION: A distillation column body 1 and an outer cylindrical body 2 for heat insulation provided by forming a clearance part 20 between itself and the outer peripheral surface of the column body are provided, and evaporated vapor generated from a liquid mixture 31 in a distillation pot 3 is introduced into the column body and the clearance part and raised, and the outer cylindrical body is allowed to have self heat-supply heat-insulation effect for supplying heat to the column body and insulating heat thereof, by the vapor introduced into the clearance part. Since the evaporated vapor having the same component as the evaporated vapor introduced into the column body is introduced into the clearance part, the column body can be maintained at the optimum temperature. |
