Limit dimensions of removable mechanical impurities from waste engine oil during separation

Separation is an intermediate technological operation for the purification of used engine oil (UEO) in the oil regeneration process. The maximum particle size of contaminants remaining in the oil after separation is the most important factor characterizing the quality of cleaning. It depends on many factors, such as the separating factor of the separator, the diameter and density of the contaminant particles, the density of the used oil, and the operating time. The proposed theoretical dependences for determining the quality of cleaning as satisfactory coincide with experimental studies regarding the purification of milk. However, due to significant differences in the physicochemical properties of used engine oils (UEO) and milk, the theoretical dependences proposed in [1] are not in satisfactory agreement with experimental data.The aim of the present work is to obtain a mathematical model (MM) of UEO purification in a separator and to verify its adequacy with experimental data.A MM for cleaning used engine oil in a separator, which describes the experimental data with an accuracy of 5%, has been obtained.