Тези доповідей, матеріали конференцій
Постійне посилання на розділhttps://dspace.nuft.edu.ua/handle/123456789/7373
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Документ Substantiation of Energy Parameters of a Continuous-Action Vibroextractor for a Solid-Liquid System(2020) Zavialov, Volodymyr; Mysiura, Taras; Popova, Nataliia; Zaporozhets, Yuliia; Chornyi, ValentynThe results of studies on energy consumption for the process of extracting target components with continuous vibration extraction in a solid-liquid system with a small difference in phase densities are presented. The influence of low-frequency mechanical oscillations on energy consumption is substantiated and regularities of their change from the mode parameters of the process are established. It is established that the power required to perform vibration mixing is determined by the fictitious force in the oscillatory motion and the resistance created by the viscous friction of the mixing device in the working environment. Taking into account the fictitious component of the vibrating mixing system, the equation of total energy consumption for the continuous vibration extraction process is obtained. For the interpretation of the obtained experimental dependencies, the energy consumption by the vibration mixing devices was calculated. It has been shown that vibration mixing allows for the efficient use of the energy invested in a unit of work volume, evenly distributing it in the cross-section of the apparatus.Документ Justification of Local Expenditure Characteristics of Vibrotransporting Devices in Design Modeling of Continuous Vibroextractors(2021) Zavialov, Volodymyr; Mysiura, Taras; Popova, Nataliia; Zaporozhets, Yuliia; Chornyi, ValentynExtensive industrial implementation and practical provision of conditions for optimal vibroextraction process, which is based on a new method of countercurrent phase separation and creation of a regime of intensive alternating turbulence of the workflow by pulsating jets, is constrained by the complexity and insufficient study of expenditure characteristics of vibrotransporting devices required for modeling and design of this type apparatuses. For this purpose, the article describes the regularity of pulsating jets propagation generated by transport elements, the dependence of the vibroextractor productivity on the solid phase, and the level of longitudinal mixing by the longitudinal mixing coefficient from determining relative geometric parameters. The mathematical description can be taken as a basis for optimizing problems for the definition of rational operating modes of the vibroextractors having the combined structure of hydrodynamic flows and providing necessary productivity with the minimum effect of longitudinal mixing.Документ Regularities of solid-phase continuous vibration extraction and prospects for its industrial use(2019) Zavialov, Volodymyr; Mysiura, Taras; Popova, Nataliia; Sukmanov, Valeriy; Chornyi, ValentynПредставлено переваги, будову та конструктивні особливості високоефективної віброекстракційної апаратури періодичної та безперервної дії, розробленої в останнє десятиріччя на кафедрі процесів і апаратів НУХТ за пріоритетним напрямом наукових досліджень, а також перспективи її практичної реалізації в різних галузях промисловості для раціонального перероблення рослинної сировини, її відходів з високим ступенем подрібнення та з різною морфологічною структурою з метою створення нових високоефективних технологій та обладнання. Акцентовано увагу на тому, що ефективність використання віброекстракторів для перероблення рослинної сировини та її відходів обумовлена створенням інтенсивних гідродинамічних режимів турбулентними пульсуючими струменями, генерованими віброперемішувальними елементами спеціальної конструкції. Advantages, devices and design features of high-performance vibroextraction apparatus for periodic and continuous operation developed in the last decade at the Department of Processes and Apparatuses of the Scientific and Technical University for the priority direction of scientific research are presented, as well as prospects for its practical implementation in various industries for rational processing of plant raw materials, High degree of grinding and with different morphological structure with the aim of creating new high Technologies and equipment. Attention is focused on the fact that the effectiveness of using vibroextractors for the processing of plant raw materials and waste is due to the creation of intensive hydrodynamic regimes by turbulent pulsating jets generated by special mixing vibro-mixing elements.Документ Investigation of Hydrodynamics during Continuous Vibroextraction in a Liquid–Solid Body System(2018) Zavialov, Volodymyr; Mysiura, Taras; Popova, Nataliia; Zaporozhets, Yuliia; Dekanskiy, VadimResults of investigations of the hydrodynamics of flows in a counterflow continuous column-type vibroextractor for a liquid–solid body system and their generalization in the form of a mathematical description are presented. Результати досліджень гідродинаміки протитечій віброекстрактор безперервної дії колонного типу для системи рідина–тверде тіло та подано їх узагальнення у вигляді математичного опису.Документ Justification of the influence of low-frequency mechanical vibrations on the intensification of the process of extraction of desired components from plant raw materials(2014) Zavialov, Volodymyr; Mysiura, Taras; Malezhik, Ivan; Bodrov, Viktor; Zaporozhets, Yuliia; Popova, Nataliia; Lobok, AlexeyThe problem to justify the influence of low-frequency mechanical vibrations on external mass transfer under the conditions of vibroextraction from plant raw materials and establish the regularities of its change depending of the mode parameters of the process was stated. Tim intensive renewal of the contact surface of phases in vibroextractors was achieved due to the mode parameters of the process (frequency and anqjlitude of vibrations of the vibrotransporting system). The established functional dependence of saturation of the extract by extractive substances with time on the volume mass-transfer coefficient will enable us to determine the minimum time for which the system achieves die equilibrium state of not only extraction processes, but also of the processes that are accompanied by mass exchange in apparatuses with mixing devices. The conclusions and results of the mathematical modeling under the conditions of vibroextraction agree with the results of die experiments.