Leito Fluidizado. AO. Alessa Oliveira. Updated 14 May Transcript. Tamanho de partícula. Diâmetros Equivalentes. Caracterização de Partículas. Request PDF on ResearchGate | On Jan 1, , Rejane Helena Ribeiro da Costa and others published Reatores de leito fluidizado: Potencialidades para o . 3: Esquemas de gaseificadores de leito fluidizado (a) borbulhante e (b) circulante, com identificação das respectivas regiões. Fonte: adaptado de Belgiorno et al.
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Estudo da secagem de sementes de embaúba em leito fluidizado
The objective of this work is to study the fluidized bed capable of carrying out the drying of seed of native plants with the maintenance of physical and physiological properties. Resumo Drying operation is an important stage of the processing that precedes the storage of seeds, since that with low moisture contents, these can retain their power of germination and other qualities for long periods.
Besides, experimental comparisons of the drying process in the equipment operating as fixed bed and fluixizado bed were made.
The data obtained were compared with empirical equations and the resulting semi-empirical literature.
Fluid dynamics, heat transfer and drying tests were accomplished in order to verify the operational limitations of the equipment, as well as determining the main characteristic experimental parameters of the seeds such as minimum fluidization velocity fluidizaxo transfer coefficients.
The drying operation is fundamental in the improvement of seeds, since it is not a seed recalcitrant. Metadata Mostrar registro completo.
Resumo Due to the importance of conservation of ecosystems and having Cecropia glaziovi. Some features of this site may not work without it. Some features of this site may not work without it. The objective of this work was to perform a study of drying of grass seeds Brachiaria brizantha in a batch fluidized bed, in order to evaluate the performance of the dryer in a physiological and phenomenological point of view.
There is currently interest in studies of convective drying of the seeds on bed furniture, as in previous search has been shown to occur in fixed bed preferential channels and agglomerations of particles. Using the method of SOGAB, demonstrated the fluidziado of velocity and temperature in the entrance region of the measuring cell.
S as a pioneer species of the Tropical Forests, this plant becomes leoto in reforestation areas altered wild. Moreover, two types of models were tested three-phase and two-phase models with the purpose of comparing the feasibility of its applications.
Secagem de sementes de gramíneas (Brachiaria brizantha) em leito fluidizado
Among the main results, it was found that the simplified two-phase model provided better gluidizado of the drying experiments in fluidized bed, specially the temperature of the bed, than the three-phase model, which takes into account the existence of the solid, interstitial gas and bubble gas phases. The fluid dynamics of the contact between the seed and the fluid was drawn from measurements of pressure drop and air flow rates increasing and decreasing the bed.
Sensitivity analyses were carried out on the main parameters and properties of the models aiming to discuss their strengths and weaknesses. Assessment of germination, regardless of substrates, which are germitest paper germibox tanks and soil showed that the seeds are suitable for replanting.
Metadata Mostrar registro completo. By applying the hypothesis test of equality between the experimental and simulated variables, it was found a P-value equal to 0, for the simplified model Tm variable, better than the three-phase model corresponding variables. It was possible to obtain, after drying, seed with adequate humidity values for the storage and physiological qualities contribute to the perpetuation of these embryos and dissemination of higher plants in nature.
The analyze the fluid allowed to obtain the information on the fluidisation characteristics curves, while the drying tests enabled the knowledge of the effects of temperature and velocity of the drying air on the properties of the seeds.