| 摘要 |
PURPOSE:To use the titled device for a along period by keeping the whole circulating passage at reduce pressure at the time of heating a heating medium, and preventing the oxidation of the heating medium in the device having the heating medium circulating passage such as a centrifugal evaporator. CONSTITUTION:A rotor 3 having a funneled evaporation surface 3a is provided in a centrifugal evaporation vessel 1, a heat-transfer part 11 through which a heating medium is circulated is formed integrally with the rotor 3, and a passage 15 for circulating the heating medium furnished with a heater 12, a pump 13, and a reservoir 14 is connected to the rotor. The heating medium circulating through the passage is stored in the reservoir to form a space 26, an oil-sealed rotary vacuum pump 27 is connected to the space 26 through a pipeline 28, and hence the whole circulating passage 15 can be kept at reduced pressure at the time of heating and circulating the heating medium. As a result, the oxidation of the heating medium is prevented, and frying oil. etc., can also be used.
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