Theoretical Rationale Of Adopting Dust Removal Systems In Workplaces Of Reception Points At Mixed Feed Milling Plants

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Tatiana I. Belova, Alexander V. Titenok, Valery A. Bezik, Olga E. Shirobokova, Sergey V. Terekhov


The labour conditions of mixed feed production do not always meet regulatory requirements due to dust generation. Dust forms in all the phases of mixed feed production, especially during the acceptable of raw materials. The concentration of dust observed in this phase can cause the formation of explosive mixtures. This work provides the theoretical underpinning of improving the labour conditions at reception points of mixed feed milling plants. The article takes into account the concentration and particle-size distribution of dust, which provides the ground for calculating the efficiency of the dust removal system. The harmful effect of dust on the operator is conditioned by its amount in the work zone air. A diagram of dust generation and removal at the reception point of a mixed feed milling plant is elaborated. A procedure of determining the probability of the operator’s  staying in harmful labor conditions is proposed. The dust removal system design for specific conditions is determined. The space angle limiting the discharge of the dust removal system is modified by installing safety enclosures for the feed hopper. The smaller is this angle, the higher is the airflow speed created by the dust removal system near the unloading area; however, it is necessary to consider the structure and technology features of the production process. The structural features of air ducts, treatment facilities, and other ventilation elements will allow designing an efficient dust removal system. A conclusion is made that better labour conditions are ensured by optimizing the aerodynamic characteristics of the dust removal system. A practical example of using the material provided in the article is considered.

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