Operations

Preprocessing is necessary for centrifugal separators to function effectively. Because separation is done in principle by sedimentation resulting from the difference of specific gravities and the target to be separated is not a dissolved solution, but a mixed solution, preprocessing should be carried out so that the sedimentation velocity between mixed materials is increased.
In typical preprocessing, the concentrated liquid is heated for oil-water separation. As the temperature rises, the specific gravity difference increases and the oil viscosity becomes lower, causing the sedimentation velocity of heavy liquid and water to be raised and the separation effect to be improved.
As for dissolved materials, they can be separated by a separator if they have been insolubilized in advance. For example, deoxidization of oil and fat is carried out in this way. In this case, the stock oil and fat are added with caustic soda and then free fatty acid is insolubilized through saponification and removed by a separator.

Operations