To download article.DOI: 10.15507/2658-4123.031.202104.591-608
Experimental Data of Grinding Dried Fibrous Plant Materials
Sergey V. Braginets
Leading Researcher of Plant Production Processing Department, Agricultural Research Center “Donskoy” (3 Nauchnyy Gorodok St., Zernograd 347740, Russian Federation), Cand.Sci. (Engr.), ORCID: https://orcid.org/0000-0001-7137-5692, Researcher ID: Y-6307-2019, Scopus ID: 57202639521, This email address is being protected from spambots. You need JavaScript enabled to view it.
Oleg N. Bakhchevnikov
Leading Researcher of Plant Production Processing Department, Agricultural Research Center “Donskoy” (3 Nauchnyy Gorodok St., Zernograd 347740, Russian Federation), Cand.Sci. (Engr.), ORCID: https://orcid.org/0000-0002-3362-5627, Researcher ID: S-3312-2016, Scopus ID: 57202648620, This email address is being protected from spambots. You need JavaScript enabled to view it.
Aleksandr S. Alferov
Researcher of Plant Production Processing Department, Agricultural Research Center “Donskoy” (3 Nauchnyy Gorodok St., Zernograd 347740, Russian Federation), Cand.Sci. (Engr.), ORCID: https://orcid.org/0000-0001-5210-781X, This email address is being protected from spambots. You need JavaScript enabled to view it.
Abstract
Introduction. Developing a method for energy-efficient grinding of fibrous vegetable raw materials to avoid the clogging of grids remains an urgent task. The aim of the research is to study the process of grinding dried fibrous plant materials and to estimate the influence of the device operating characteristics on the quality of grinding and the process energy intensity.
Materials and Methods. The experimental apparatus is a rotor grinder. Its working bodies are alternate knives and hammers. When a hammer is in motion, its triangle side creates the reduced pressure area. There was studied the influence of the linear velocities of knife motion and of feed of raw materials on fractional composition of the grinded materials, grinder productivity, and grinding specific energy capacity.
Results. It is found that the change in the fractional composition of the grinded product occurs when the speed of the rotor knives increases. Optimal range of knife speed for producing the product of the required fractional composition is 55‒75 m/s. The increase in the speed leads to increasing productivity, but is accompanied by the growth of specific power intensity. If the rotor speed is constant, the increase of raw material feed increases the grinder productivity, but only up to a certain value. After that, the productivity decreases because of excessive filling of the working chamber with raw materials and clogging of the grates. For each value of the knife speed, there is an optimal feed that ensures the maximum productivity. High values of knife speed lead to significant energy intensity of the process and overgrinding of raw materials. Therefore, the optimal range of knife speed is 55‒65 m/s.
Discussion and Conclusion. Effective grinding of raw materials is achieved through lower energy capacity of grinding process and absence of grate clogs resulted from separating particles from the surface of plants to be grinded.
Keywords: fibrous plant materials, grinding, cutting, grinder, specific energy capacity, blades linear velocity, fractional content the grinded product, low air pressure
Acknowledgments: The authors are grateful to the editors and reviewers for their attentive attitude to the article and for the indicated remarks, which improved its quality.
The authors declare no conflict of interest.
For citation: Braginets S.V., Bakhchevnikov O.N., Alferov A.S. Experimental Data of Grinding Dried Fibrous Plant Materials. Inzhenernyye tekhnologii i sistemy = Engineering Technologies and Systems. 2021; 31(4):591-608. doi: https://doi.org/10.15507/2658-4123.031.202104.591-608
Contribution of the authors:
S. V. Braginets – scientific guidance, formulating the basic concept of research, general management of experimental research, conducting a critical analysis of the results and formulating conclusions.
O. N. Bakhchevnikov – analyzing literary data, preparing the original version of the text and finalizing the text.
A. S. Alferov – conducting experiments and processing their results.
All authors have read and approved the final manuscript.
Submitted 02.07.2021; approved after reviewing 05.08.2021;
accepted for publication 10.10.2021
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