Apparatus for purifying waste lubricant and method of purifying waste lubricant using the same

摘要

There are provided an apparatus and a method for eliminating water and particulate pollutant contained in a waste lubricant. The waste lubricant heated up to a proper temperature is injected into a vacuum chamber through a nozzle, the vacuum chamber maintaining a predetermined degree of vacuum. The water contained in the waste lubricant is vaporized according to a relationship between a vaporizing temperature of the waste lubricant and a vaporizing temperature of the water contained in the waste lubricant. The vaporized water is transformed into condensate water while passing through a condenser, and is stored in a water storage container. In addition, the waste lubricant, from which water is eliminated, is introduced into a waste lubricant discharging chamber by discharging means, and is passed through an electrostatic separator by an oil pump, to collect particulate pollutant. Two electrodes, each having a polarity opposite to each other, are provided inside the electrostatic separator, and are applied with a high voltage by a high-voltage generating unit, so as to form a strong electric field in a space between the two electrodes, in which the waste lubricant is located, and collect particulate pollutant contained in the waste lubricant by the electrostatic force in the electric field.