2018
DOI: 10.1016/j.cep.2018.05.014
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Analysis of the energy performance of a modified mechanically spouted bed applied in the drying of alumina and skimmed milk

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Cited by 20 publications
(15 citation statements)
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“…The unique features of S‐FB reactors offer the possibility to overcome the inherent limitations of conventional FB (e.g., bed defluidization and agglomeration, [ 25 ] bed segregation, [ 26,27 ] difficulties in handling irregular or sticky solids as well as particles larger than a few hundred micrometres in diameter [ 28 ] ) and spouted beds (SB) where the fluid is supplied through a central jet only (e.g., short residence time, which involves serious problems for minimizing tar formation [ 29,30 ] ; low energy efficiency and high air velocity required to establish the spout regime [ 31 ] ; low annulus aeration which may cause dead zones and particle agglomeration [ 32 ] ; high pressure drop prior to onset of spouting, and slow solids turnover [ 32 ] ), thus providing better gas‐solid contact and mixing, even fluid flow distribution, lesser reaction dead zones, and improved mass and heat transfer characteristics. [ 33–35 ] However, the hydrodynamics of S‐FBs is more complex than that of either conventional FBs or classical SBs, and there is no uniformity in the literature in designating flow regimes.…”
Section: Introductionmentioning
confidence: 99%
“…The unique features of S‐FB reactors offer the possibility to overcome the inherent limitations of conventional FB (e.g., bed defluidization and agglomeration, [ 25 ] bed segregation, [ 26,27 ] difficulties in handling irregular or sticky solids as well as particles larger than a few hundred micrometres in diameter [ 28 ] ) and spouted beds (SB) where the fluid is supplied through a central jet only (e.g., short residence time, which involves serious problems for minimizing tar formation [ 29,30 ] ; low energy efficiency and high air velocity required to establish the spout regime [ 31 ] ; low annulus aeration which may cause dead zones and particle agglomeration [ 32 ] ; high pressure drop prior to onset of spouting, and slow solids turnover [ 32 ] ), thus providing better gas‐solid contact and mixing, even fluid flow distribution, lesser reaction dead zones, and improved mass and heat transfer characteristics. [ 33–35 ] However, the hydrodynamics of S‐FBs is more complex than that of either conventional FBs or classical SBs, and there is no uniformity in the literature in designating flow regimes.…”
Section: Introductionmentioning
confidence: 99%
“…In the industry, drying represents a significant fraction of the use of energy in the whole process of grain production. The high energy demand is associated with the heat required for water removal, inefficiency in the process of heat transfer, and the loss factors associated with most dryers (Kudra, 2004;Brito et al, 2018).…”
Section: Introductionmentioning
confidence: 99%
“…Dryers whose technology allows the optimization of energy consumption or changes in the process can improve drying efficiency. Considering the high investment in new dryers, intermittent drying becomes an affordable alternative for meeting the investment required, also resulting in the improvement of product quality (Brito et al, 2018).…”
Section: Introductionmentioning
confidence: 99%
“…However, conventional spouted bed presents low energy efficiency and high specific energy consumption. This happens mostly due to the need of high air velocity to establish the spout regime and to maintain the hydrodynamic stability during the paste feeding (Brito, Sousa, Béttega, Freire, & Freire, 2018; Kudra, 2012). Therefore, knowledge about the influence of operational variables on the energy performance of the process is of great interest.…”
Section: Introductionmentioning
confidence: 99%