Construction of a mathematical model of extraction process in the system "solid body ‒ liquid" in a microwave field

Authors

DOI:

https://doi.org/10.15587/1729-4061.2018.145232

Keywords:

extraction, microwave field, heat and mass exchange, material balance, differential equations

Abstract

We have analyzed the extraction process in the technology of oilseed processing. This paper describes the original provisions, specificity, modern scientific schools, and the level of representation of the classic extraction process. The specificity of mathematical modeling of the extraction process, given the introduction of an additional driving force that significantly affects the kinetics of extraction in an electromagnetic field of ultra-high frequency, is considered from the classical theory of the process.

We have constructed the extraction kinetics calculation formulae, in microwave field, which develop the theory of extraction kinetics in an electromagnetic field. The paper gives an analysis of variants for the representation of a mathematical notation of the extraction process of disperse materials in an electromagnetic field of ultra-high frequency. A complete model of the mass exchange processes during extraction in a microwave field in the differential form will make it possible to generate conditions for conducting comprehensive experimental studies, which would fully define the extraction process of oilseeds.

We have theoretically substantiated the process of heat and mass exchange between the all defining objects inside an extraction unit with an electromagnetic field of ultra-high frequency. Based on material balances, we derived equations describing the basic dynamic characteristics of oil extraction mode in an extraction unit. Since the precise analytical solution to the presented mathematical model in the form of a system of differential equations in particular derivatives does not exist, the approximate solution has been proposed. It makes it possible to identify the distribution of an extractant depending on the size of fractions of raw materials, the existence and magnitude of power of the pulsed electromagnetic field of ultra-high frequency, the extractant's hydro-module, temperature, solvents, for any point in time.

Based on the experimental research into extraction of oilseed material, it was established that under the action of microwave radiation a value for the mass release coefficient during extraction of oilseed raw materials grows by an order of magnitude (β=1·10-5) compared to extraction without the effect of MW field (β=1·10-6). Oil extraction under the action of a microwave field increases to 30 %, while electricity consumption decreases by 93‒97 %. The application of a microwave field would not only improve production efficiency, but reduce energy costs during process by an order of magnitude

Author Biographies

Boris Kotov, State Agrarian and Engineering University in Podilya Shevchenka str., 13, Kamianets-Podilskyi, Ukraine, 32300

Doctor of Technical Sciences, Professor

Department of Energy and Electrotechnical Systems in Agroindustrial Complex

Valentina Bandura, Vinnytsia National Agrarian University Soniachna str., 3, Vinnytsia, Ukraine, 21008

PhD, Professor

Department of Processes and equipment processing and food production named after prof. P. S. Bernik

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Published

2018-10-22

How to Cite

Kotov, B., & Bandura, V. (2018). Construction of a mathematical model of extraction process in the system "solid body ‒ liquid" in a microwave field. Eastern-European Journal of Enterprise Technologies, 5(6 (95), 33–43. https://doi.org/10.15587/1729-4061.2018.145232

Issue

Vol. 5 No. 6 (95) (2018): Technology organic and inorganic substances

Section

Technology organic and inorganic substances

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Copyright (c) 2018 Boris Kotov, Valentina Bandura

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