Secagem de óleos isolantes utilizando sistema de adsorção em leito fixo

Abstract

Insulating oil is a type of lubricants which main function is to insulate and to cool electrical equipments. These oils may be from mineral base (petroleum derivates) or from synthetic base. A good performance of the functions of oil depends on their features and specific properties (e.g. high dielectric breakdown voltage, low acidity index and low humidity). The water can be in the oil as free or as dissociated causing problems in the functions of the insulating liquid, because the water influences direct and meaningfully the electrical properties of that lubricant. The method generally used to drying of the insulating oil submits it to temperatures between 50 and 80∞C and to high vacuum. This can collaborate with a precocious oxidative process in the oil. In this study, it intends to use an adsorptive process of purification to remove the humidity from the fresh insulating oil at room conditions. Thus, it has been used packed beds to evaluate the efficiency of this process, as also to obtain preliminary kinetic and hydrodynamic data.