REDUCTION OF AIR DUST OF THE WORK ZONE AT WOODWORKING ENTERPRISES

Abstract

The assessment of air dust at the workplaces of the woodworking enterprise was carried out. It was found that the dust in the workplace exceeds the established standard MPC for wood dust by an average of 1.3…2.5 times. The most unfavorable working conditions are observed at the workplaces of grinding and belt machine operators, where the dust concentration reaches 5.7 MPC. The processes of spreading and settling of dust in production facilities have been studied. It is established that regardless of the wood species, the change in the dust content of the working area and the density of dust in the production premises at different distances from the sources of dust removal is subject to the exponential law. Experimental dependences characterizing these changes are obtained. Existing aspiration systems were examined. The discrepancy between the volumes of air removed from the equipment and the design value has been established, which leads to the removal of dust into the air of the work area and causes increased dust in the workplace. Examination of aspiration systems showed that the reason for their unstable operation is the presence of dust deposits on the inner surfaces of horizontal air ducts.