Improving the mechanical-mathematical model of grain mass separation in a fluidized bed

Authors

DOI:

https://doi.org/10.15587/1729-4061.2021.232017

Keywords:

mechanical-mathematical model of separation, grain mass, seed material, fluidized bed

Abstract

This paper has substantiated the prospect of modeling the processes of separating grain mass into fractions as one of the tasks in the production of high-quality seed material. It has been determined that this could optimize the parameters of separation processes and design new working surfaces for its implementation. It is noted that modeling should take into consideration the influence of the structural and kinematic parameters of grain cleaning machines, the physical and mechanical properties of raw materials, the intralayer processes and forces.

The reported theoretical study has improved the mechanical-mathematical model of grain mass separation in a pseudo-fluidized bed according to its density. The model establishes a relationship between the effective coefficient of dynamic viscosity and the density of particles in the discrete and continuous phases and the volumetric concentration of discrete phase particles. At the same time, the porosity of a fluidized bed has been accounted for, as well as the longitudinal and transverse angles of inclination of the base surface to the horizontal plane, the amplitude and frequency of oscillations of the particles of the continuous phase; the direction angle of oscillations relative to the perpendicular to the base surface.

The adequacy of the improved mechanical-mathematical model has been confirmed by comparing the experimental and theoretical results of grain mass fractionation modeling. It was found that the differences in the density values of the separated fractions of GM did not exceed 7...8 %, that is, they were within the margin of error.

It has been established that the improved model of grain mass separation in a fluidized bed could be used to determine the rational values for the parameters of a pneumatic sorting table that is used for the fractionation of the corresponding seed material. The initial data, in this case, are the density of the continuous and solid phases of grain mass, the friction coefficient of the seeds, and the equivalent radius of the particle. The result of modeling is the rational values of the amplitude and oscillation frequency of the working surface of the pneumatic sorting table, and the angles of inclination of the working surface

Author Biographies

Vadym Bredykhin, Kharkiv Petro Vasylenko National Technical University of Agriculture

PhD, Associate Professor

Department of Physics and Theoretical Mechanics

Petro Gurskyi, Kharkiv Petro Vasylenko National Technical University of Agriculture

PhD, Associate Professor

Department of Equipment and Engineering of Processing and Food Production

Oleksiy Alfyorov, Kharkiv Petro Vasylenko National Technical University of Agriculture

Doctor of Technical Sciences, Associate Professor

Department of Operation, Reliability, Strength and Construction named after V. Anilovich

Khrystyna Bredykhina, Kharkiv Petro Vasylenko National Technical University of Agriculture

Postgraduate Student

Department of Optimization of Technological Systems named after T. Yevsiukov

Andrey Pak, Kharkiv Petro Vasylenko National Technical University of Agriculture

Doctor of Technical Sciences, Associate Professor

Department of Physics and Theoretical Mechanics

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Published

2021-06-10

How to Cite

Bredykhin, V., Gurskyi, P., Alfyorov, O., Bredykhina, K., & Pak, A. (2021). Improving the mechanical-mathematical model of grain mass separation in a fluidized bed . Eastern-European Journal of Enterprise Technologies, 3(1 (111), 79–86. https://doi.org/10.15587/1729-4061.2021.232017

Issue

Vol. 3 No. 1 (111) (2021): Engineering technological systems

Section

Engineering technological systems

License

Copyright (c) 2021 Вадим Викторович Бредихин, Петр Васильевич Гурский, Алексей Игоревич Алфёров, Кристина Александровна Бредихина, Андрей Олегович Пак

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