Zerstäuben von Flüssigkeiten mit Einstoff-Druckdüsen

Walzel, Peter

doi:10.1007/978-3-662-52991-1_95-1

Cited by 3 publications

(2 citation statements)

References 94 publications

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“…At the nozzle tip the air is accelerated almost up to ultrasonic speed. The high speed air stream adds velocity to the urea injection flow, provides primary droplet formation, supports flow mixture and as a consequence secondary droplet formation (5,6) . The droplet diameter achieved is about 15 µm SMD (Sauter Mean Diameter).…”

Section: Fig 2 Design Of the Dosing Nozzlementioning

confidence: 99%

Urea Solution Dosing System for Improved Catalyst Efficiency

Hüthwohl¹,

Müschen²

2016

IJAE

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Section: Fig 2 Design Of the Dosing Nozzlementioning

confidence: 99%

Urea Solution Dosing System for Improved Catalyst Efficiency

Hüthwohl¹,

Müschen²

2016

IJAE

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“…The desired oil droplet size distribution (ODSD) in the powder is usually adjusted in a homogenization step prior to spray drying. However, in our previous study we showed that oil droplets dispersed in the feed for spray-drying may breakup during atomization with pressure swirl (PS) atomizers [9], which are used in the vast majority of spray drying applications for foods [2,10]. Oil droplet breakup during atomization changes the previously adjusted ODSD.…”

Section: Introductionmentioning

confidence: 99%

Investigation of Oil Droplet Breakup during Atomization of Emulsions: Comparison of Pressure Swirl and Twin-Fluid Atomizers

Taboada

Zapata

Karbstein

et al. 2021

Fluids

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The goal of this study was to investigate oil droplet breakup in food emulsions during atomization with pressure swirl (PS), internal mixing (IM), and external mixing (EM) twin-fluid atomizers. By this, new knowledge is provided that facilitates the design of atomization processes, taking into account atomization performance as well as product characteristics (oil droplet size). Atomization experiments were performed in pilot plant scale at liquid volume flow rates of 21.8, 28.0, and 33.3 L/h. Corresponding liquid pressures in the range of 50–200 bar and air-to-liquid ratios in the range of 0.03–0.5 were applied. Two approaches were followed: oil droplet breakup was initially compared for conditions by which the same spray droplet sizes were achieved at constant liquid throughput. For all volume flow rates, the strongest oil droplet breakup was obtained with the PS nozzle, followed by the IM and the EM twin-fluid atomizer. In a second approach, the concept of energy density EV was used to characterize the sizes of resulting spray droplets and of the dispersed oil droplets in the spray. For all nozzles, Sauter mean diameters of spray and oil droplets showed a power-law dependency on EV. PS nozzles achieved the smallest spray droplet sizes and the strongest oil droplet breakup for a constant EV. In twin-fluid atomizers, the nozzle type (IM or EM) has a significant influence on the resulting oil droplet size, even when the resulting spray droplet size is independent of this nozzle type. Overall, it was shown that the proposed concept of EV allows formulating process functions that simplify the design of atomization processes regarding both spray and oil droplet sizes.

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Spraying and Atomizing of Liquids

Walzel

2019

Ullmann's Encyclopedia of Industrial Chemistry

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Zerstäuben von Flüssigkeiten mit Einstoff-Druckdüsen

Cited by 3 publications

References 94 publications

Urea Solution Dosing System for Improved Catalyst Efficiency

Urea Solution Dosing System for Improved Catalyst Efficiency

Investigation of Oil Droplet Breakup during Atomization of Emulsions: Comparison of Pressure Swirl and Twin-Fluid Atomizers

Spraying and Atomizing of Liquids

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