Investigating the process of filtration of liquid aerosols emitted in machining using oil coolants

The aim of the project was to investigate the process of filtration from the point of view of protecting workers against harmful aerosol particles with the use of multilayer filtration systems in machining processes using oil coolants. Commercial nonwoven made from spun-lace polyester fibres (A, B, C) and from melt-blown polypropylene fibres were used in the study.Parameters that had been determined were used in assessing risk of workers working in condition where multilayer filtration systems were used in machining processes. Risk during machining using oil coolants was assessed in the context of oil mist that is produced as a result of dynamic and thermal processes and the relationship between the dynamic changes in pressure drop and the efficiency of aerosol filtration and:- structural parameters of multilayer filtration systems,- process parameters of machining,- parameters of physicochemical aerosols.An analysis of the results was the basis for developing block diagrams of procedures and computer algorithms assisting in determining optimal filtration parameters of multilayer filtration systems in local exhaust ventilation during machining using oil coolants.