Pneumatic Classification Of The Granular Materials In The “Rhombic” Apparatus

Yukhimenko, Mykola; Litvinenko, A. I.

doi:10.12776/mie.v13i1-2.340

Cited by 3 publications

(3 citation statements)

References 2 publications

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“…Despite the variety of granulation and drying devices (an overview of methods for obtaining granulated dispersed materials is given, for example, in [5][6][7][8][9][10][11][12]), multistage devices with vertical sectioning of the working space did not receive a wide distribution for drying. The effectiveness of such devices has been proven by the example of various classifiers and granular devices [13][14][15][16][17][18], which confirms the relevance of their further implementation in the drying technology. The authors of this work attempted a theoretical description [19], experimental studies of the fluidized bed configuration [20], and the conditions for the implementation of heat-mass transfer processes [21] in other devices with the directed motion of the dispersed phase -vortex granulators [22].…”

Section: Introductionmentioning

confidence: 61%

Bulletin of the Polish Academy of Sciences: Technical Sciences

Artyukhova,

Krmela,

Krmelová

et al. 2021

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The article deals with studying the hydrodynamic characteristics of the fluidized bed in gravitation shelf dryers. The algorithm to calculate hydrodynamic characteristics of the fluidized bed in the dryer's workspace is described. Every block of the algorithm has a primary hydrodynamic characteristics theoretical model of calculation. Principles of disperse phase motion in various areas in the gravitation shelf dryer are established. The software realization of the author's mathematic model to calculate disperse phase motion trajectory in a free and constrained regime, disperse phase residence time in the dryers' workspace, polydisperse systems classification is proposed in the study. Calculations of disperse phase motion hydrodynamic characteristics using the software product ANSYS CFX, based on the author's mathematic model, are presented in the article. The software product enables automating calculation simultaneously by several optimization criteria and visualizing calculation results in the form of 3D images. The disperse phase flow velocity fields are obtained; principles of a wide fraction of the disperse phase distribution in the workspace of the shelf dryer are fixed. The way to define disperse phase residence time91 in the workspace of the shelf dryer in free (without consideration of cooperation with other particles and dryer's elements) and con-strained motion regimes is proposed in the research. The calculation results make a base for the optimal choice of the gravitation shelf dryer working chamber sizes.

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Section: Introductionmentioning

confidence: 61%

Bulletin of the Polish Academy of Sciences: Technical Sciences

Artyukhova,

Krmela,

Krmelová

et al. 2021

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“…Thus, a rhomb-shaped pneumatic classifier is a relatively new device, which is applied in the technology of producing organic mineral fertilizers [17,18]. Due to the absence of internal contact elements, the rhomb-shaped pneumatic classifiers have a minimized hydraulic resistance.…”

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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“…Technological scheme of the pneumatic classification unit Assembled representation of the laboratory unit for pneumatic classification[7] …”

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confidence: 99%

Modelling of Separation and Air Classification Processes of Aerodisperse Systems in the Shelving Device

Varukha¹,

Смирнов²,

Edl³

et al. 2018

JES

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The following paper considers the process of classification of polydisperse free-flowing material according to granulometric composition using a gravitational air classificator. There were considered the problems of the purity of separation of polydisperse bulk materials and methods for increasing the degree of separation of particles. There were presented and analyzed obtained the results of the comparison, the data of experimental research and computer simulation of two-phase hydrodynamics flow by CFD methods. The versatility of this complex allowed carrying out simulation of the process using various parameters. As a result, were obtained optimal operating parameters, which were experimentally verified. Based on the obtained data as a result of numerical modelling, the possibility of increasing gas flow influence to the polydispersed material were found, as well as organization along the walls of coarse fraction downward flow by dint of the optimizing the devise design (specifically through the organization of additional inlets for airflow) were obtained.

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Pneumatic Classification Of The Granular Materials In The “Rhombic” Apparatus

Cited by 3 publications

References 2 publications

Bulletin of the Polish Academy of Sciences: Technical Sciences

Bulletin of the Polish Academy of Sciences: Technical Sciences

Pneumatic Classification of Granular Materials in Rhomb-Shaped Apparatus

Modelling of Separation and Air Classification Processes of Aerodisperse Systems in the Shelving Device

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