206 Cleaning and De-oiling of Machine Parts with Low-pressure Flashing Flow
Details
Usually, Trichloroethane has been used for the de-oiling and the cleaning of machine parts. But its production and import have been prohibited since 1995 because of its possibility to destroy the ozone layer. Generally for biological and environmental safety, the de-oiling should be done with the physical method instead of the chemical method. As one of the physical method, a cleaning by a steam flow in a packed bed of machine parts was proposed. In the previous study, the saturated or superheated steam of 150〜270℃ was used.The steam of high pressure and high temperature successfully removed the oil on the machine parts in a few minutes. In the present study, the lowpressure flashing flow was applied to the packed bed of machine parts. The temperature and pressure of the flashing flow were less than 100℃ and atmospheric pressure, respectively.
