Abstract
The paper presents the experimental installation, the methodology and measuring apparatus used for experimental research of qualitative indexes of impurities separation out of grain seeds for combined separating systems (according to specific weight and aerodynamic properties of seeds). The experimental installation used was composed of a gravimetric separator with mechanical shaker with unbalanced masses (mounted on the platform working surface) and an aspiration installation with fan. The experimental research has aimed at quantitative and qualitative influence on separation quality index of the following operating parameters: material flow rate of shaking separator, the air flow of aspiration installation, tilting work surface, work surface oscillation amplitude. Based on data obtained by measurements and qualitative indicators the separating process indexes have been determined, namely: degree of impurities separation, degree of good seeds loss, as well as, the separation quality index for different types of combinations of separation installation parameters.
Highlights
IntroductionGrain seeds cannot be used directly for different purposes (storage, consumption, industrialization, sowing, etc.) because they contain impurities of any kind (vegetal remains, foreign bodies, etc.) and injured products
After the harvesting process, grain seeds cannot be used directly for different purposes because they contain impurities of any kind and injured products
From the correlation of graphical representation in figure 4-7 with relation (6) result that the separation quality index ECS decreases with the increase of the supplying flow rate with product, of the working surface inclination angle, of the suction air flow rate and of the working surface amplitude
Summary
Grain seeds cannot be used directly for different purposes (storage, consumption, industrialization, sowing, etc.) because they contain impurities of any kind (vegetal remains, foreign bodies, etc.) and injured products. The preparation of cereal seeds before processing them is a technological process, which requires technical equipment and combined installations types to eliminate foreign bodies existing in the mass of harvested seeds, whose construction depends on the different types of separation [1, 2, 3, 4] Research in this area focused on the determination of the physico-chemical properties of the components of a seed mixture that influence the separation process, with the aim of eliminating as much as possible the impurities that reach the final stages of grain processing [5,6, 7].
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