| 摘要 |
PURPOSE:To increase the distillation amt. and to reduce the cost of solvent by providing a scraper for scraping vapor foam formed on a vapor generating surface in contact with the vapor generating surface and movably relatively to the vapor generating surface. CONSTITUTION:The solvent to be distilled from a hot bath is introduced into a rotary disk 9 from an intake 13 for a solvent to be distilled through an introducing pipe 8a, and spread from the central part to the circumferential part by centrifugal force due to rotation to form a thin film. The solvent is evaporated by heating the rotary disk with an electric heater 9a. The vapor, passing through vapor discharge ports 14 is cooled in a cooling coil 15, condensed and discharged from a discharge pipe 8b. The concentrated liquid is taken out from a discharge valve 16. The vapor foam 19 generated at the bottom of the rotary disk 9 is forcibly scraped off by chains 18 to be made into solvent vapor.
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