Estimation of power consumption when trapping finely-dispersed particles in a separator with coaxially-arranged pipes

This article sets out to estimate power consumption when trapping finely-dispersed particles of silicon dioxide using a separator with coaxially-arranged pipes, as well as the efficiency of such an installation. To this end, a numerical simulation of the movement of a gas flow with finely-dispersed particles of silicon dioxide through a separator with coaxial pipes was carried out in the ANSYS Fluent software. During the experiments, the inlet gas flow rate varied from 5 to 10 m/s, while the width and height of the rectangular slit ranged 2.1-8.7 and 10-30 mm, respectively. It was shown that the maximum efficiency of collecting finely-dispersed silicon dioxide particles and the minimum power consumption required for pumping the gas flow through the installation largely depends on the formation of a stable vortex structure in the interpipe space. The research showed that the optimal inlet gas flow rate equals 7.5 m/s. At this rate, the efficiency of particle collection corresponds to higher rates with a devia tion of ± 6%. In this case, the pressure loss is 1.74 times lower than that at higher rates. In order to achieve an efficiency of at least 90% with the height of the rectangular slit from 10 to 30 mm, the Stokes numbers must correspond to values of more than 50. The power consumption required for pumping a gas containing silicon dioxide particles through a separator equipped with coaxial pipes comprises from 1.9 to 31.2 W at the inlet gas flow rate of 7.5 m/s. In this case, the parameters of the rectangular slit are as follows: width - from 2.1 to 8.7 mm, height - from 10 to 30 mm. The use of separators with coaxially-arranged pipes in technological lines based on plasma technologies can become an alternative to installations for fine gas purification.

1. Kosmachev PV, Vlasov VA, Volokitin GG. Nanosized SiO2 obtained by plasma-arc method. Vestnik Bur-yatskogo gosudarstvennogo universiteta. Himiya. Fizika = Dorji Banzarov Buryat State University Bulletin. Chemistry. Physics. 2018;2-3:15—19. (In Russ.) https://doi.org/10.18101/2306-2363-2018-2-3-15-19

2. Postnov VN, Mel'nikova NA, Svistunova OS, Postnov DV, Murin IV. Nafion nanocomposites containing a modified aerosil. Zhurnal obshchej himii = Russian Journal of General Chemistry. 2016;86(10):1756—1758. (In Russ.) https://doi.org/10.1134/S1070363216100273

3. Ab Rahman I, Ghazali NAM, Bakar WZW, Masudi SA. Modification of glass ionomer cement by incorporating nanozirconia-hydroxyapatite-silica nanopowder composite by the one-pot technique for hardness and aesthetics improvement. Ceramics International. 2017;43(16):13247—13253. https://doi.org/10.1016/j.ceramint.2017.07.022

4. Cho Y-S, Moon J-W. Collection of industrial oil using nanoparticles and porous pow-ders of silica. Archives of Metallurgy and Materials. 2017;62(2B):1371-1375. https://doi.org/10.1515/amm-2017-0211

5. Zinurov VE, Dmitriev AV, Mubarakshina RR. Improving aspiration systems efficiency in processing of starchy raw materials. Polzunovskiy vestnik. 2020;2:18-22. (In Russ.) https://doi.org/10.25712/ASTU.2072-8921.2020.02.004

6. Tofighian H, Amani E, Saffar-Avval M. A large eddy simulation study of cyclones: the effect of sub-models on efficiency and erosion prediction. Powder Technology. 2020;360:1237-1252. https://doi.org/10.1016/j.powtec.2019.10.091

7. Zinurov VE, Dmitriev AV, Solovjova OV, Latypov DN. Impact of polluting a dust separator with fine dust upon the energy consumption during its operation. Vestnik tehnologicheskogo universiteta. 2019;22(8):33-37. (In Russ.)

8. Laptev AG, Basharov MM, Lapteva EA. Separation and energy efficiency of packed apparatuses for purifying gases from aerosols. Teoreticheskie osnovy himicheskoj tekhnologii = Theoretical Foundations of Chemical Engineering. 2017;51(5):491-498. (In Russ.)

9. Zinurov VE, Dmitriev AV, Dmitrieva OS. Catching fine droplets of a gas flow in an I-type separator. Promyshlennaya energetika. 2020;12:47-53. (In Russ.) https://doi.org/10.34831/EP.2020.23.49.008

10. Song Chengming, Pei Binbin, Jiang Mengting, Wang Bo, Xu Delong, Chen Yanxin. Numerical analysis of forces exerted on particles in cyclone separators. Powder Technology. 2016;294:437-448. https://doi.org/10.1016lj.powtec.2016.02.052

11. Mazyan WI, Ahmadi A, Ahmed H, Hoorfar M. Increasing efficiency of natural gas cy-clones through addition of tangential chambers. Journal of Aerosol Science. 2017;110:36-42. https://doi.org/10.1016/jJaerosci.2017.05.007

12. Dmitriev AV, Zinurov VE, Dmitrieva OS. Intensification of gas flow purification from finely dispersed particles by means of rectangular separator. In: Materials Science and En-gineering: IOP Conference Series. 2018;451:012211. https://doi.org/10.1088/1757-899X/451/1/012211

13. Gao Sihong, Zhang Dandan, Fan Yiping, Lu Chunxi. A novel gas-solids separator scheme of coupling cyclone with circulating granular bed filter (C-CGBF). Journal of Hazardous Materials. 2019;362:403-411. https://doi.org/10.1016/j.jhazmat.2018.07.065

14. Dmitriev AV, Zinurov VE, Dmitrieva OS. Influence of elements thickness of separation devices on the finely dispersed particles collection efficiency. In: International Conference on Modern Trends in Manufacturing Technologies and Equipment: MATEC Web of Conferences. 2018;224:02073. https://doi.org/10.1051/matecconf/201822402073

15. Sagot B, Forthomme A, Ait Ali Yahia L, De La Bourdonnaye G. Experimental study of cyclone performance for blow-by gas cleaning applications. Journal of Aerosol Science. 2017;110:53-69. https://doi.org/10.1016/jJaerosci.2017.05.009

16. Tsareva OV, Balyberdin AS, Vakhitov MR, Kharkov VV, Dubkova NZ. Investigation of filter materials for gas cleaning from sulfuric acid. In: Earth and Environmental Science: IOP Conference Series. 2020;421(7):072014. https://doi.org/10.1088/1755-1315/421/7/072014

17. Zhang Mingxing, Chen Haiyan, Yan Cuiping, Li Qi-anqian, Qiu Jie. Investigation to rec-tangular flat pleated filter for collecting corn straw particles during pulse cleaning. Ad-vanced Powder Technology. 2018;29(8):1787-1794. https://doi.org/10.1016fj.apt.2018.04.014

18. Le Dang Khoi, Yoon Joon Yong. Numerical investigation on the performance and flow pattern of two novel innovative designs of four-inlet cyclone separator. Chemical Engi-neering and Processing - Process Intensification. 2020;150:107867. https://doi.org/10.1016/j.cep.2020.107867

19. Parvaz F, Hosseini SH, Elsayed K, Ahmadi G. Numerical investigation of effects of inner cone on flow field, performance and erosion rate of cyclone separators. Separation and Purification Technology. 2018;201:223-237. https://doi.org/10.1016/j.seppur.2018.03.001

20. Venkatesh S, Sakthivel M. Numerical investigation and optimization for performance analysis in Venturi inlet cyclone separator. Desalination and Water Treatment. 2017;90:168-179. https://doi.org/10.5004/dwt.2017.21444