Multistage Shelf Devices with Fluidized Bed for Heat-Mass Transfer Processes: Experimental Studies and Practical Implementation

Yukhymenko, Mykola; Аrtyukhov, Аrtem; Ostroha, Ruslan; Аrtyukhova, Nadiia; Krmela, Ján; Bocko, Jozef

doi:10.3390/app11031159

Cited by 4 publications

(3 citation statements)

References 49 publications

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“…In [16], authors analysed the pressure drop during the movement of the gas flow through the holes of a gas distribution grid and free space for unloading particles from the layer. Dependences have been obtained for estimating the velocity profile of a gas flow as it passes through perforation holes of an inclined gas distribution grid.…”

Section: Problem Statementmentioning

confidence: 99%

Hydraulic Regularities of Fluidized Bed During Encapsulation of Organo-mineral Fertilizers

Ostroha¹,

Yukhymenko²,

Mandryka³

2023

AMS

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The advantages of using encapsulated organo-mineral fertilizers are presented. It is proposed to use a fluidized bed apparatus for coating carbamide granules with an organic shell. Importance of the fluidized bed hydraulic characteristics and their influence on the energy costs of the process are emphasized. Experimental study results prove that irrigation density of granular layer with the suspension has significant influence on the hydraulic resistance of a fluidized bed. It is proposed an analytical dependence for determining the hydraulic resistance of a fluidized bed, which takes into account influence of the organic suspension flow rate.

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Section: Problem Statementmentioning

confidence: 99%

Hydraulic Regularities of Fluidized Bed During Encapsulation of Organo-mineral Fertilizers

Ostroha¹,

Yukhymenko²,

Mandryka³

2023

AMS

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“…However, it is intended for the multi-product separation of powdered materials and thus cannot be applied to the processing of granular products. The design of the device with a cascade of perforated shelves in the lower part is proposed as a cooler of granular mineral fertilizers and a dryer for granular materials [20]. Therefore, as a pneumatic classifier, this apparatus cannot provide sufficient efficiency.…”

Section: Literature Review and Problem Statementmentioning

confidence: 99%

Design of a shelf pneumatic classifier for separating a polydisperse mixture of granulated superphosphate

Yukhymenko

Ostroha

Bocko

2022

EEJET

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The object of this study is a polydisperse mixture of granular superphosphate. It is emphasized that existing technologies of granulation and processing of granules lead to the formation of dusty fractions of small particles. The content of small fractions in the finished product should be minimal and, in connection with this problem, the task is to remove small particles from the mixture. The purpose of the current experimental study is to classify a polydisperse mixture of granular superphosphate in a pneumatic classifier. The device includes an inclined perforated shelf with an unloading space between its end and the wall of the apparatus. It has been experimentally revealed that the maximum efficiency of extraction into the entrainment of small particles is achieved with a width of the discharge space equal to 0.5 of the length of the cross-sectional side of the apparatus; the degree of perforation of the shelf is 5 %; the angle of inclination of the shelf is 25–30°; the speed of the gas flow in the free section of the apparatus is 3.7 m/s. It is shown that the degree of extraction into the entrainment of a small fraction less than 1 mm in size reaches 70–75 %, the content of the small fraction in the carry-over is 96–98 %, and the large fraction is less than 5 %. By processing experimental data, an empirical equation was built that makes it possible to determine the concentration of particles in the gas stream for individual fractions of the material. It is shown that due to the implementation of an active aerodynamic weighing mode, the shelf pneumatic classifier works at specific loads for air flow rate less than the typical designs of fluidized bed separators. It is noted that the effective operation of the shelf pneumatic classifier in the production of granular mineral fertilizers is ensured at a productivity of no more than 10–12 t/h. With greater productivity, there is a need to install several devices in the technological line

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“…The apparatus of this design enables effectively removing the fine fraction of less than 1 mm from the polydispersed mixture of granular mineral fertilizers [14]. Pneumatic classifiers with a fluidized bed of the granular layer and perforated grate [15,16] are mainly intended for separation of the bulk product in order to separate particles less than 0.5 mm from the layer.…”

Section: Problem Statementmentioning

confidence: 99%

Pneumatic Classification of Granular Materials in Rhomb-Shaped Apparatus

Yukhymenko¹,

Ostroha²,

Evtuhov³

2021

AMS

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The article deals with studying of the gas-dispersed systems classification process in gravitation pneumoclassifiers of prismatic shape. The research is aimed at developing a pneumatic classification method for granular materials using a rhomb-shaped apparatus and ensuring the reliability of the operating process based on the influence of the flow on the granular material concentrations. The related mathematical model is developed for estimating the non-stationary concentration of fine particles in a gas-dispersed flow with respect to time and height of the working space of the apparatus. It is shown that the rhomb-shaped pneumatic classifier provides effective separation of granular material, reaching up to 95 % of the target fraction.

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Multistage Shelf Devices with Fluidized Bed for Heat-Mass Transfer Processes: Experimental Studies and Practical Implementation

Cited by 4 publications

References 49 publications

Hydraulic Regularities of Fluidized Bed During Encapsulation of Organo-mineral Fertilizers

Hydraulic Regularities of Fluidized Bed During Encapsulation of Organo-mineral Fertilizers

Design of a shelf pneumatic classifier for separating a polydisperse mixture of granulated superphosphate

Pneumatic Classification of Granular Materials in Rhomb-Shaped Apparatus

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