efeito do tempo de armazenagem de rações avícolas no dimensionamento de silos effect of time storage of poultry rations for silos design

Clicks: 244
ID: 158369
2009
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Abstract
Dentre os fatores que afetam o fluxo de produtos sólidos, o tempo de armazenagem destaca-se por favorecer a formação de arcos coesivos. Dessa forma, esta pesquisa teve como objetivo determinar as propriedades de duas rações avícolas, classificá-las quanto à escoabilidade em função do tempo de consolidação e analisar seus efeitos em tremonhas metálicas. Para isso, foram utilizados aparelho de cisalhamento direto "Jenike Shear Cell", bancada de consolidação e duas superfícies de parede. Para o índice de fluxo e diâmetro mínimo do orifício de descarga, adotou-se a metodologia de Jenike. Para o ângulo da tremonha cônica, recorreu-se à metodologia de Enstad. Pode-se afirmar que as duas rações possuem fluxo do tipo fácil, sem variação para os tempos de armazenagem estudados. A rugosidade das paredes apenas afetou a inclinação da tremonha, enquanto os resultados de orifício de descarga não foram afetados pela variação das propriedades das rações nas paredes e nos tempos analisados.
Among the factors that affect the flow of solid products, the storage time stands out being responsible for promoting the appearance of cohesive arches. Thus, the present research had as objective to determine the properties of two poultry types of ration, classifying them through the flowability depending on the consolidation time and analyzing their effects in metallic hoppers. For this purpose, a direct shear apparatus known as Jenike Shear Cell', a consolidation bench and two wall surfaces were used. For the index flow and minimum diameter of the discharge hole, it was used the Jenike's methodology. For conical hopper angle the Enstad's methodology was adopted. It can be affirmed that the two types of ration presented easy flow, not depending on the storage period. The roughness walls affected only the hopper slope, while the results of the discharge hole were not affected by the variation of the properties of the types of ration on the wall surfaces and elapsed times studied.
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Authors ;José P. Lopes Neto;José W. B. do Nascimento;Valneide R. da Silva
Journal bioorganic and medicinal chemistry letters
Year 2009
DOI
10.1590/S0100-69162009000400002
URL
http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-69162009000400002
Keywords
consolidation

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