Theoretical background to substantiation of the parameters of mixer for protein, mineral and vitamin additives
https://doi.org/10.30766/2072-9081.2022.23.3.411-416
Abstract
One way to improve the mixing efficiency of protein-mineral-vitamin additives for cattle diets is to fluidize the material. The aim of the study is to define theoretical dependences between the speed and energy characteristics of the formation of a fluidized bed on the physical and mechanical properties of mixing substances and on structural and kinematic parameters of the mixer. The research was carried out in 2021. A coefficient of structural and mechanical resistance of the disperse many-component system was introduced to clarify the characteristics of additives mixing in the fluidization mode. The obtained equations described the particle velocity and the energy consumption for the particle flow in a fluidized bed influenced by a blade mixer. Next step was to reveal the effect of the layer porosity and the mixer blade angle on the particle velocity in the mixture. The velocity loss equation was solved as a graph for the value of 5 m/s at the blade edge. The variation in the layer porosity had a significant effect on considered parameter. The greatest velocity loss exceeded 4.5 m/s observed at the smallest porosity of 0.14 and the biggest blade angle of 75º. The smallest loss was below 0.5 m/s at the largest porosity of 0.34 and the smallest blade angle of 15º. Thus, the decrease in the particle velocity by 10 to 90 % was observed in the considered coordinates.
Keywords
Supporting agencies: The research was carried out under the support of the Ministry of Science and Higher Education of the Russian Federation within the state assignment of the Federal Scientific Agroengineering Center VIM (theme No. FGUN-2022-0010). The author thanks the reviewers for their contribution to the expert evaluation of this work.
About the Author
E. V. Avakimyants
Institute for Engineering and Environmental Problems in Agricultural Production (IEEP) – branch of Federal Scientific Agroengineering Center VIM
Russian Federation
Russian Federation
Evgeny V. , post-graduate student, junior researcher
3, Filtrovskoje Shosse, p.o. Tiarlevo, Saint Petersburg, 196625
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Review
For citations:
Avakimyants E.V. Theoretical background to substantiation of the parameters of mixer for protein, mineral and vitamin additives. Agricultural Science Euro-North-East. 2022;23(3):411-416. (In Russ.) https://doi.org/10.30766/2072-9081.2022.23.3.411-416
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