One of the effective methods of using waste motor oils (WMO) in agricultural enterprises is to clean them from contaminants accumulated in them during operation, which include mechanical impurities (dust, water, wear products of engine parts) and products of destruction of the oil itself (acids, hydroxy acids), carbenes, carboids, etc.) and the subsequent use of purified oils in those components and mechanisms that, according to operating conditions, allow the use of such oils. To ensure the subsequent use of purified OMM, it is necessary that particles of a size not exceeding 2-3 microns remain in the oil after cleaning. To clean OMM from mechanical impurities, so-called granular filters can be used. In these filters, used motor oil passes through a granular layer (sand, expanded clay, ash, etc.), while the impurities contained in the oil are deposited in the volume of the granular layer. When determining the rational parameters of such filters, it is necessary to solve the following problems: determining the quality of filtration; determination of filtration rate; determining the dynamics of filter contamination; determining the filter's operating life. The article describes the types of bulk materials that can be used for cleaning waste materials. It has been shown that the filter material is characterized by a number of parameters that affect both the operating parameters of the filter and the efficiency of the cleaning process of the processed OMM. A mathematical model has been obtained that determines the dynamics of changes in the throughput of the filter material. The results of a theoretical study of the dynamics of pollution are compared with experimental studies.
fficiency, filtration process, used motor oil, bulk filters, filter material, dirt holding capacity, coarseness grain shape, porosity, filtration speed
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