| 摘要 |
A continuous method and apparatus for distilling a liquid include conducting the distilling liquid through at least two successive distillation units operating at different temperature levels. The distilling liquid is vaporized in each distillation unit and the obtained vapor condensed into distillate by conducting the vapor into heat exchange relationship with the liquid discharged from the evaporators in a succeeding distillation unit which operates at a lower temperature level. At least one of the distillation units includes a plurality of communicating distillation stages, each distillation stage including an evaporator and a corresponding condenser.
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