Journal
Scientific journal NRU ITMO Series "Processes and equipment for food production"
UDK637.143
Issue:4 (26)
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The hydrodynamics of three-phase flows in vertical pipes with a jet dispersing the gas phase
Annotation
The article describes theconstruction shell and tube jet-injection flow-type apparatus and mode of operation, the relevance of which is associated with the development of new technologies in the production of ethanol from starch-containing grain. For the successful implementation of the device in the industry requires comprehensive theoretical and experimental research in order to create scientifically sound methodology for their calculation. We discuss the structure of the three-phase flow model: model of three separate phases and quasi-two phase flow model. It is shown that to describe the hydrodynamic flow of the three-phase flow more convenient two-phase model, which considers a mixture of liquid and solid phases as a stream of quasi-liquid phase. Two approaches to the description of the hydrodynamics of three-phase flows in a vertical pipe-tube jet-injection flow-type apparatus. The first approach is based on the equation of energy balance, the second - on the additive hydraulic resistance of the circulation circuit. Based on consideration of the forces acting in the three-phase mixture flow obtained by the equation of the circulation circuit, allows determining the superficial liquid velocity in the tubes of this construction apparatus.
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