About the separation of finely divided particles during centrifugation in liquid media
DOI:
https://doi.org/10.26577/jmmcs-2018-2-397Кілттік сөздер:
separation, settling, centrifuge, multiphase fluid, rotor system, demetallization of oilАннотация
This work is devoted to the study of centrifugation processes, which are one of the most complex
processes of technology. The use of the action of the centrifugal force field for the separation
of heterogeneous liquid systems in a rotor system (centrifuge) is very effective. Separability of
centrifuged materials, multiphase dispersion, the relationship between phases cause ambiguous
processes of centrifugation, and therefore it is not always possible to accurately predict and evaluate
the main characteristics of the separation of heterogeneous systems in the centrifugal force field.
For a qualitative assessment of the main separation characteristics, such as the angular velocity
of rotation, the dependence of the angles of inclination of the glasses on the angular velocity, the
settling time of particles, etc., is created a mathematical model of the vertical rotor system. The
rotor represents a round disk on which cups (vial) with a multiphase liquid are symmetrically
suspended. A particular case of a fixed rotor is considered. Nonlinear differential equations of
motion of the suspension particle, which have no exact solution, are obtained. The research is
conducted by analytical and numerical methods. The dependence of the slope angles of the tubes
from the angular rotational speed of the rotor, sedimentation curves are obtained , which allow
estimating the time of particle deposition and the effect of the particle size distribution on the
separation process. The results of this research work allow us to determine with sufficient accuracy
all the necessary characteristics of the sedimentation working process, and also, in certain cases,
it is possible to exclude the conduct of experimental work. The results of the work confirm the
physical meaning of the process, which can serve as a justification for the use and introduction of
this mathematical model in industrial production.
Библиографиялық сілтемелер
2. Burrows A., “Oil and Gas High performance separation,” FILTRATION & SEPARATION 52-2 (2015):1.
3. Sokolov V.I., Centrifugirovanie [Centrifugation]. Moscow: Chemistry, (1976):407.
4. Shkoropad D.E, Novikov O.P., Centrifugi i separatory dlja himicheskih proizvodstv [Centrifuges and separators for chemical industries]. Moscow: Chemistry, (1987):256.
5. Krzysztof Ligier, “Methods of diagnosing an acww 1000 sugar centrifuge with the use of vibration processes,” Technical sciences 11(2008):289-300.
6. Janusz Zachwieja, Krzysztof Ligier, “Numerical analysis of vertical rotor dynamics of ACWW 1000 centrifuge,” (paper presented at a Journal of theoretical and applied mechanics, 257-275, 2005).
7. Fischer J., Strackeljan J., “Stability Analyses of High Speed lab centrifuges considering internal damping in rotor shafts,” Technische Mechanik 26-2 (2006):131–147.
8. Babenko A.E., “Dynamics of a centrifuge on a nonlinearly elastic base,” Vestnik NTUU "KPI". Mechanical engineering 61 (2011):91-94.
9. The patent 3729128 USA, B1;233/1R,1B/ High Pressure Centrifuge Lubrication System/Reed, Karl Gardner; 24.04.1973.
10. The patent 6530871, USA, B1;256/1R,1B/ Methods for separating constituents of biologic liquid mixtures/ Nash; John E.;11.03.2003.
11. The patent 67478, RU U1;415,1A,5B/ Inverting filter centrifuges/Alekseyev A.V.;04.05.2007.
12. The patent 2622946, RU C2;13,3A,6C/ Extractor-Type Centrifuge/Aslanov G.G.;22.03.2013.
13. The patent 03258359, JPH А;104,2C,7D/ High Performance Fixed Angle Rotor/Yamanaka S.;18.11.1991.
14. The patent 03/086571,WO A1;405,4D,5D/Sliding discharge centrifuges/Miln K.;23.10.2003.
15. The patent 19922237, DE A1;603, Z,7,1AA/ High Capacity Swinging Bucket /Damgard A; 07.12.2000.
16. Proshin, I.A., Burkov V.V., “Mathematical modeling of centrifugation processes,” Bulletin of VSTU Т.11.
17. Please C.P., Fowkes N.D., Mason D.P., Khalique C.M., Hutchinson A., Rademeyer M.C., Loubser R., and Davis S., “Extraction of Molasses from Sugar Crystals in a Centrifuge,” Mathematical Modelling and Analysis 19-3 (2014):347-358.
18. Childs D., Turbomachinery rotordynamics phenomena: Modeling and Analysis. (Wiley-Interscience, 1993).
19. Kydyrbekuly A.B., Khajieva L.A., Ybraev G.E., “Researching of the Method of Separation of Fine-Grain Particles by Centrifugation in a Liquid Medium ” (paper presented at Proc.12th International Conference on the Theory of Machines and Mechanisms, ADVANCES IN MECHANISM DESIGN II, Mechanisms and Machine Science, 105-116, 2017).
20. Sokolov V.I., Sovremennie promishlennie centrifugi [Modern industrial centrifuges]. Moscow: Mashinostroenie, (1967):524.
