| 摘要 |
PURPOSE: To prevent overheating of a distillation liquid by providing an induction-heating means of rotor with at least two concentric inductors supplying independently different thermal power densities to homologous regions of the rotor and allowing an inner inductor to supply a greater thermal power density to the rotor than the power density supplied to the rotor by an outer inductor. CONSTITUTION: The apparatus comprises a metallic conical rotor 12 ratably driven and fed in its center with a liquid to be distilled, a vacuum bell member constituting an enclosure housing surrounding the rotor 12, and a means for inductively heating the rotor 12 which is located beneath and in proximity to the rotor 12. The heating means comprises at least two concentric inductors 100a, 100b, 100c supplying different thermal power densities to homologous regions of the rotor 12 and inner inductors 100a, 100b, 100c supply greater thermal power densities than the power density supplied by an outer inductor 100c. As a result, the distillation liquid can be prevented from being overheated and induction heating efficiency can be improved.
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