Simulation of agglomeration in spray dryers: 
the EDECAD project

Verdurmen, R. E. M.; Verschueren, M.; Gunsing, M.; Straatsma, Han; Blei, Stefan; Sommerfeld, Martin

doi:10.1051/lait:2005023

Cited by 8 publications

(8 citation statements)

References 15 publications

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“…Chamber diameter is 4.3 m. The air inlet is positioned at the top center, the air outlet at the right side of the cone. Copyright from Verdurmen et al [29] Reproduced with permission from EDP Sciences.…”

Section: Resultsmentioning

confidence: 99%

“…The configuration is identical to Figure 4. Copyright from Verdurmen et al [29] Reproduced with permission from EDP Sciences.…”

Section: Resultsmentioning

confidence: 99%

“…Simulated particle trajectories (the shown size is a measure of the particle diameter and the colours represent the particle temperature in K). Copyright from Verdurmen et al [29] Reproduced with permission from EDP Sciences. [29] Reproduced with permission from EDP Sciences.…”

Section: Stickiness Measurements and Simulation Resultsmentioning

confidence: 99%

“…Copyright from Verdurmen et al [29] Reproduced with permission from EDP Sciences. [29] Reproduced with permission from EDP Sciences. 724 VERDURMEN ET AL.…”

Section: Stickiness Measurements and Simulation Resultsmentioning

confidence: 99%

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Agglomeration in Spray Drying Installations (The EDECAD Project): Stickiness Measurements and Simulation Results

et al. 2006

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Spray drying is used for the manufacture of many consumer and industrial products such as instant dairy and food products, laundry detergents, pharmaceuticals, ceramics, and agrochemicals. During spray drying, agglomerates of powder particles are formed that determine the instant properties of the powder. Agglomeration during spray drying is considered to be a difficult process to control. The main cause of this is the complex interaction of the process variables: the atomization process, the mixing of spray and hot air, the drying of suspension droplets, and the collision of particles, which might lead to coalescence or agglomeration. As a consequence, agglomeration during spray drying is operated by trial and error. In an EC-sponsored project, named the EDECAD project and coordinated by NIZO food research, an industrially validated computer model, using CFD technology, to predict agglomeration processes in spray drying machines is developed. A Euler-Lagrange approach with appropriate elementary models for drying, collision, coalescence, and agglomeration of the dispersed phase is used. The main result of the EDECAD project is a so-called design tool, which establishes relations between the configuration of the drying installation (geometry, nozzle selection), process conditions, product composition, and final powder properties. The design tool has been validated on pilot plant scale and industrial scale. This article presents the setup and results of dynamic stickiness tests and some CFD simulation and validation results.

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Section: Resultsmentioning

confidence: 99%

“…The configuration is identical to Figure 4. Copyright from Verdurmen et al [29] Reproduced with permission from EDP Sciences.…”

Section: Resultsmentioning

confidence: 99%

Section: Stickiness Measurements and Simulation Resultsmentioning

confidence: 99%

“…Copyright from Verdurmen et al [29] Reproduced with permission from EDP Sciences. [29] Reproduced with permission from EDP Sciences. 724 VERDURMEN ET AL.…”

Section: Stickiness Measurements and Simulation Resultsmentioning

confidence: 99%

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Agglomeration in Spray Drying Installations (The EDECAD Project): Stickiness Measurements and Simulation Results

et al. 2006

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“…Stochastic and direct simulation Monte Carlo collision and coalescence models approaches were implemented in the CFD codes they developed [2,48,57]. The "Design" tools developed by EDECAD project were validated in a pilot spray dryer [59]. This probably is the most comprehensive modeling study of spray dryers including many complex interactions.…”

Section: Mathematical Modeling Of Spray Dryersmentioning

confidence: 99%

An overview of the recent advances in spray-drying

Mujumdar

Huang

Chen

2010

Dairy Sci. Technol.

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-A global overview is presented of recent developments in spray drying. Recent advances in computational fluid dynamics modeling have provided new insights into the flow processes occurring within the spray chamber. This is important since detailed experimental measurements within an operating spray dryer are almost impossible due to the hostile environment of hightemperature two-phase flow, which may be unsteady, and the high cost that would have to incur. Some recent predictive studies on predicted effects of innovative chamber geometry, reduced pressure operation, operation in low dew-point air and superheated steam are presented. Also, a comparison is made between steady and unsteady state computations to highlight the critical issues. Predicted results on a horizontal spray chamber configuration are also presented. Finally, a brief survey is made on the recent literature on spray freeze-drying as well as multi-stage drying processes.computational fluid dynamics / modeling / spray drying / CFDRésumé -Récentes avancées dans la conception et l'optimisation des installations de séchage par pulvérisation : une vue d'ensemble. Un inventaire des récents développements dans le domaine du séchage par pulvérisation est dressé. Les dernières avancées de la dynamique des fluides numérique ont permis d'obtenir de nouvelles représentations des processus d'écoulement ayant lieu à l'intérieur de la chambre de séchage. Ces modélisations sont très importantes car des mesures expérimentales détaillées à l'intérieur d'une installation de séchage en fonctionnement sont pratiquement impossibles à réaliser, en raison des conditions hostiles liées au flux à température élevée de deux phases, pouvant être irrégulier, et aux coûts qui seraient engendrés. Des études prédictives récentes sur les effets d'une géométrie innovante de la chambre, de conditions de pression réduite, d'air à bas point de rosée et de vapeur surchauffée, sont notamment présentées. Article published by EDP Sciences Une comparaison des calculs réalisés dans des conditions stables ou instables est également réalisée afin de mettre en lumière les points critiques. Les résultats de la prédiction pour une configuration de chambre horizontale sont présentés. Enfin, les dernières publications sur le couplage séchage par pulvérisation-lyophilisation et les procédés de séchage multi-étage sont présentées rapidement.dynamique des fluides / modélisation / séchage par pulvérisation / CFD

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Donkey milk powder production and properties compared to other milk powders

Renzo

Altieri

Genovese

2013

Dairy Sci. & Technol.

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In order to adapt the seasonal production of donkey milk to constant market demand, this study was aimed to define the project parameters of a pilot spray dryer for producing soluble milk powder from donkey milk concentrate. The concentrate (23% mean dry matter (wb)) was spray-dried using three different inlet air temperatures (120–150–185 °C). Both cow and goat milk were used as reference in the trials, and ascorbic acid was used as a chemical marker to evaluate thermal damage to the powder. The thermal damage index (IDT) and insolubility index (IINS) were used to assess the quality of the powders produced. Prediction models were developed for each kind of milk to correlate spray-drying operating temperatures to the IINS and IDT. The results of experimental trials were used to determine optimal processing temperatures (both inlet and outlet air temperature) in order to obtain an “extra-grade” milk powder from donkey milk concentrate (the maximum allowed inlet air temperature that resulted was 173.5 °C)

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Simulation of agglomeration in spray dryers: the EDECAD project

Cited by 8 publications

References 15 publications

Agglomeration in Spray Drying Installations (The EDECAD Project): Stickiness Measurements and Simulation Results

Agglomeration in Spray Drying Installations (The EDECAD Project): Stickiness Measurements and Simulation Results

An overview of the recent advances in spray-drying

Donkey milk powder production and properties compared to other milk powders

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