Aspects concerning the Drying of Granular Biomaterials with Intensive Techniques I.Dynamics of Modified Fluidized Bed In the Presence of Inert Particles

Mares, Alina Monica; Isopencu, Gabriela; Jinescu, Cosmin

doi:10.37358/rc.08.1.1712

Cited by 2 publications

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“…Thermodynamic conditions of the experiments used in this study were achieved in our previous studies [14,16,27]. The dynamic parameters of granular fluidized bed were established to be suitable for the bed structure.…”

Section: Resultsmentioning

confidence: 99%

“…The developments of the regime of fluidization and subsequent design modifications have made fluidization a desirable drying technique among others. To improve fluidization regime, one method is to change bed structure by adding another material with different shape/size (called inert), fact evidenced in an early ours work [16]. In our study, this material was chosen considering the chemical and physical nature: sand (an inorganic material, mineral nature, with low hydroscopic tendency); smashed malt (organic material, easy moisturizing, useful because require any separation process after drying), as presented in table 1.…”

Section: Experimental Part Materialsmentioning

confidence: 99%

“…Exergy loss = Exergy inflow -Exergy outflow (16) The exergy inflow for the dryer is stated as below:…”

Section: Exergy Analysismentioning

confidence: 99%

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Energy and Exergy Studies for Different Intensifying Processes of Malt Drying

Isopencu¹,

Mares²,

Jinescu³

2017

Rev. Chim.

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In this research, a comprehensive thermodynamic investigation through energy and exergy analyses is conducted to assess the performance of malt and mixtures of malt - inert add drying process. In this regard, energy and exergy efficiencies are evaluated with the experimental thermodynamic data for different techniques of malt drying (fixed, fluidized and modified fluidized bed with inert add). For all drying techniques analyzed, the study evidenced that energy utilization increases with drying agent velocity, drying time and temperature, meanwhile the energy utilization ratio decreases with this parameters. On the other hand, exergy loss and exergy efficiency increases with air velocity and drying temperature, but they have an antagonist behavior regarding with drying time: exergy loss decreasing in time, meanwhile the exergetic efficiency increases in time. The energetic values of the parameters for the fluidized bed are considerable smaller than those of fixed bed, which recommends the fluidization as intensification technique for malt drying. Also, the study evidenced the good influence on the energetic behavior of the fluidized bed, if the malt particle are mixed with a porous, hygroscopic inert add.

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Section: Resultsmentioning

confidence: 99%

Section: Experimental Part Materialsmentioning

confidence: 99%

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Energy and Exergy Studies for Different Intensifying Processes of Malt Drying

Isopencu¹,

Mares²,

Jinescu³

2017

Rev. Chim.

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“…Aºa cum s-a prezentat în prima parte a lucrãrii [20], materialul granular selectat în studiu a fost malþul, obþinut prin tratarea termicã a orzului germinat. Scopul principal al uscãrii malþului este acela de a asigura o conservare de lungã duratã, în condiþii normale de depozitare, prin reducerea conþinutului de apã.…”

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“…Parametri dinamici pentru realizarea fluidizãrii incipiente în strat fluidizat cu inert necesari studiului cineticii de uscare, au fost determinaþi experimental [20]; în lucrarea citatã se prezintã ºi relaþiile empirice stabilite pentru viteza minimã de fluidizare, în funcþie de fracþia masicã de material inert, x i , umiditatea iniþialã, u 0, ºi Obiectivele cercetãrii au fost: -stabilirea gradului de degradare a proteinelor la diferite temperaturi pentru selectarea domeniului de temperaturã în care poate fi utilizat agentul de uscare, corelat cu termostabilitatea ºi xerolabilitatea materialului granular utilizat;…”

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Aspects Concerning the Drying of Grained Biomaterials through Intensive Processes II. Malt Grain Drying in Fluidized Bed Formed by Inert Particles

Mares¹,

Isopencu²,

Jinescu³

et al. 2008

Rev. Chim.

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Present paper have like objective the experimental study regarding the intensification of the drying process of malt using like drying agent the atmospheric air at ambient temperature and at 45oC, in flotation-fluidized bed. To reduce the operating drying period by using the fluidization agent at 45oC, it was studied the drying in mixt bed, formed by inert particles (sand, dp=150mm, smashed malt, ) and wet malt grains (in flotation state). Comparing the drying periods and the final moistures obtained at the malt drying in fixed bed (fixed mixt bed) with those obtained in fluidized mixt bed was establish that: the drying in fluidized conditions conduce at an uniform final moisture product; the economical operating conditions for a final moisture (4 - 6%) imposed by the technological process.

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Aspects concerning the Drying of Granular Biomaterials with Intensive Techniques I.Dynamics of Modified Fluidized Bed In the Presence of Inert Particles

Cited by 2 publications

References 1 publication

Energy and Exergy Studies for Different Intensifying Processes of Malt Drying

Energy and Exergy Studies for Different Intensifying Processes of Malt Drying

Aspects Concerning the Drying of Grained Biomaterials through Intensive Processes II. Malt Grain Drying in Fluidized Bed Formed by Inert Particles

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