Study into Solid Particles Moving in the Working Areas of Part-Flow Hydrodynamic Filters with a Rotating Perforated Baffle

Abstract

The purpose of the research was to consider solid particles moving in part-flow hydrodynamic filters with a rotating perforated baffle and simulate liquid flows in the working zones of filters. The paper introduces the results of the study. Within the research, we determined the averaged values of the tangential, radial and axial components of the movement velocitis depending on the radius of the device, confirmed the validity of using a cylindrical filter wall, and established the presence of low-pressure and pressure modes of liquid cleaning in the filters. We revealed that in the low-pressure mode solid particles move in a typical for centrifuges way, and in the pressure mode the particles movement is characteristic of that of small-sized hydrocyclones. The study introduces a technique for obtaining averaged deterministic characteristics that make up the liquid flow velocity in height, azimuth and radius in the working zones of a hydrodynamic filter and estimates the averaged components of the liquid velocity. Compared to the tangential component, the axial velocity component is one order of magnitude smaller, and the radial component, two orders of magnitude smaller. Findings of the research show that the designs of such hydrodynamic filters implement a four-stage liquid cleaning system and emphasize that in transport equations not only deterministic components but also random components of ongoing processes should be taken into account for particles smaller than 40 μm

Please cite this article in English as:

Devisilov V.A., L'vov V.A., Fatova A.V. Study into solid particles moving in the working areas of part-flow hydrodynamic filters with a rotating perforated baffle. Herald of the Bauman Moscow State Technical University, Series Mechanical Engineering, 2022, no. 2 (141), pp. 112--127 (in Russ.). DOI: https://doi.org/10.18698/0236-3941-2022-2-112-127

References

[1] Belyanin P.N., Danilov V.M. Promyshlennaya chistota mashin [Industrial cleanliness of machines]. Moscow, Mashinostroenie Publ., 1982.

[2] Piskunov M.A. Cleanliness of hydraulic oil in harvester and forwarder hydraulic systems. LesPromInform, 2015, no. 4, pp. 66--72 (in Russ.).

[3] Shevchenko G.A., Krivtsova N.I. Vliyanie sernistyh soedinenij na smazyvaushchuyu sposobnost’ dizel’nyh topliv. Vestnik Tomskogo gosudarstvennogo universiteta. Khimiya, 2015, no. 2, pp. 45--58 (in Russ.).

[4] Khismatullin A.S., Bashirov M.G., Soldatova E.G., et al. Increasing the efficiency of cooling in oil transformers. Nauchno-tekhnicheskiy vedomosti SPbPU. Estestvennye i inzhenernye nauki [St. Petersburg State Polytechnic University Journal of Engineering Science and Technology], 2018, vol. 24, no. 1, pp. 38--49 (in Russ.).DOI: https://doi.org/10.18721/JEST.240104

[5] Bulat A.V., Karelina S.A., Ivanovskiy V.N., et al. Rational applications of various types of equipment for protection from mechanical impurities. Territoriya "NEFTEGAZ" [Oil and Gas Territory], 2020, no. 9-10, pp. 52--63 (in Russ.).

[6] Kicha G.P., Semenyuk L.A. Full-flow combined by filtration and by centrifugation thin cleaning of motor oil in ship diesels. Vestnik Astrakhanskogo gosudarstvennogo tekhnicheskogo universiteta. Seriya: Morskaya tekhnika i tekhnologiya [Vestnik of Astrakhan State Technical University. Series: Marine Engineering and Technology], 2018, no. 2, pp. 62--69 (in Russ.). DOI: https://doi.org/10.24143/2073-1574-2018-2-62-69

[7] Tarleton E.S. Progress in filtration and separation. Academic Press, 2014.

[8] Devisilov V.A., Sharay E.Yu. Hydrodynamic filtration. Bezopasnost’ v tekhnosfere [Safety in Technosphere], 2015, vol. 4, no. 3, pp. 68--80 (in Russ.).DOI: https://doi.org/10.12737/11885

[9] Devisilov V.A., Myagkov I.A. Hydrodynamic vibration filtration and filter designs. Bezopasnost’ zhiznedeyatel’nosti, 2004, no. 7, pp. 37--47 (in Russ.).

[10] Aleksandrov A.A., Devisilov B.A., Sharay E.Yu., et al. Effect of geometric parameters of working channel of hydrodynamic filter with protective baffle on medium flow structure. Herald of the Bauman Moscow State Technical University, Series Natural Sciences, 2018, no. 2 (77), pp. 23--38 (in Russ.). DOI: https://doi.org/10.18698/1812-3368-2018-2-23-38

[11] Mochalin E.B., Khalatov A.A. Problems of industrial cleaning of liquids from mechanical impurities and use of rotary filters. Promyshlennaya teplotekhnika [Industrial Heat Engineering], 2009, vol. 31, no. 2, pp. 19--30 (in Russ.).

[12] Devisilov V.A., Myagkov I.A., L’vov V.A., et al. Regeneriruemyj fil’tr [Regenerated Filter]. Patent RU 149 136 U1. Appl. 04.08.2014, publ. 20.12.2014 (in Russ.).

[13] Myagkov I.A., L’vov V.A., Belovolova A.L. [Study on mechanism of centrifugal separation in a hydrodynamic vibrating filter]. Sb. trudov VII Mezhdunar. ekologich. kongr. T. 6 [Proc. VII Int. Ecolog. Cong. Vol. 6]. Samara--Tol’yatti, 2019, pp. 139--144 (in Russ.).

[14] Brazhenko B.M. Theoretical research of the efficiency of a fluid mechanical cleaning by a rotary filter. Wschodnioeuropejskie Czasopismo Naukowe, 2017, vol. 12 (28), no. 2, pp. 17--22 (in Russ.).

[15] Devisilov V.A., Myagkov I.A., L’vov V.A., et al. Analytical model of suspensions separation in hydrodynamic filter with pivoting perforated partition. Bezopasnost’ v tekhnosfere [Safety in Technosphere], 2014, vol. 3, no. 5, pp. 32--41 (in Russ.). DOI: https://doi.org/10.12737/6022

[16] Ternovskiy I.G., Kutepov A.M. Gidrotsiklonirovanie [Hydrocycloning]. Moscow, Nauka Publ., 1994.

[17] Protod’yakonov I.O., Lyublinskaya I.E., Ryzhkov A.E. Gidrodinamika i massoobmen v dispersnykh sistemakh zhidkost’--tverdoe telo [Hydrodynamics and mass transfer in dispersed liquid-solid systems]. Leningrad, Khimiya Publ., 1987.

[18] Malinovskaya T.A., Kobrinskiy I.A., Kirsanov O.S., et al. Razdelenie suspenziy v khimicheskoy promyshlennosti [Separation of suspensions in chemical industry]. Moscow, Khimiya Publ., 1983.

[19] Aleksandrov A.A., Devisilov V.A., Sharay E.Yu. Numerical investigation of fluid flow between rotating permeable cylindrical surfaces. Herald of the Bauman Moscow State Technical University, Series Natural Sciences, 2020, no. 1 (88), pp. 32--45 (in Russ.). DOI: http://dx.doi.org/10.18698/1812-3368-2020-1-32-45