INFLUENCE OF DESIGN AND OPERATING PARAMETERS ON SEPARATING THE COARSE WHEAT BRAN BY CYCLONE | ||||
| Misr Journal of Agricultural Engineering | ||||
| Article 3, Volume 37, Issue 2, April 2020, Page 185-212 PDF (1.33 MB) | ||||
| Document Type: Original Article | ||||
| DOI: 10.21608/mjae.2020.95768 | ||||
 View on SCiNiTO | ||||
| Authors | ||||
| F. M. Sabbah1; M. A. Abdel-Hadi2; S. M. Radwan2; A. S. El-Sayed2 | ||||
| 1Ph.D. Student, Agric. Eng. Dept., Fac. of Agric., Suez Canal Univ., 41522 Ismailia, Egypt. | ||||
| 2Prof. of Agric. Eng., Agric. Eng. Dept., Fac. of Agric., Suez Canal Univ., 41522 Ismailia, Egypt. | ||||
| Abstract | ||||
| Experimental study and predicted models were used to investigate the effect of cyclone geometry and operating parameters such as cone height (30, 50 and 70 cm), vortex finder length (0, 10, 20, 30 and 40 cm), dipleg length (25, 40 and 55 cm) and inlet air velocity (14, 16, 18 and 20 m/s) on separating the coarse wheat bran from air stream. The performance parameters via cut-off diameter (d50), overall collection efficiency (ηo) and pressure drop (ΔP) were evaluated to determine the appropriate design of the cyclone under local operating conditions. The results showed that, ΔP increased with the increase of inlet air velocity and cone height. The optimum operating and design parameters at cone height of 70 cm were inlet air velocity 14 m/s and vortex finder length 40 cm, which lead to high ηo 99.93 % and low ΔP 80.63 Pa. While at cone height of 50 cm, the optimum operating and design parameters were: inlet air velocity 18 m/s under vortex finder length 40 cm which lead to high ηo 99.97 % and low ΔP 121.52 Pa. whereas the cone height 30 cm and vortex finder length zero cm were undesirable because they have low ηo. The d50 decreased with increase inlet air velocity and lead to increase ηo; for instance at cone height of 30 cm the d50 of Lapple model were 31.95, 29.88, 28.17 and 26.73 µm for coarse wheat bran at inlet air velocity 14, 16, 18 and 20 m/s, respectively. Moreover the statistical indicators presented that the Hoffmann & Stein model was the best model and more validation to predict coarse wheat bran ηo at cone height 30 and 50 cm. The Lapple model was the best model and more validation to predict coarse wheat bran ηo at cone height 70 cm. There is a wide range of the optimum ηo depend on the design, operating parameters and the price of the separated material and this is subject to the operator's decision; in other words balancing operating economics cost and the price of the separated material. | ||||
| References | ||||
|
Abdel-Hadi, M. A. (2014): Effect of cyclone inlet velocity and vortex finder height on coarse wheat bran dust separation. Misr J. Ag. Eng., 31(3): 1001-1024. Alexander, R. M. (1949): Fundamentals of cyclone design and operation. Proceedings of the Australian Institute of Minerals and Metals (New Series), 152/153: 202-228. Appel, W. B. (1985): Physical properties of feed ingredients. In Feed Munufuczuring Technology III. 2nd Ed., (R.R. McEllhiney, ed.) pp. 557-562, Am. Feed Ind. Assoc., Arlington, VA. USA.
Azadi M.; M. Azadi and A. Mohebbi (2010): A CFD study of the effect of cyclone size on its performance parameters. Journal of Hazardous Materials, 182(1-3): 835-841.
Bryant, H. S.; R. W. Silverman and F. A. Zenz (1983): How dust in gas affects cyclone pressure drop. Hydrocarbon Processing, 62(4): 87-90. Büttner, H. (1999): Dimensionless representation of particle separation characteristic of cyclones. Journal of Aerosol Science, 30(10): 1291-1302. Chen, C. C. and R. V. Morey (1989): Comparison of four EMC/ERH equations. Trans. Amer. Soc. Agr. Eng., 32: 983-989.
Chen, J. and M. Shi (2007): A universal model to calculate cyclone pressure drop. Powder Technology, (171): 184-191. Chuah, T. G.; J. Gimbun and T. S. Y. Choong (2006): A CFD study of the effect of cone dimensions on sampling aerocyclones performance and hydrodynamics. Powder Technology, 162: 126-132.
Chuah, T. G.; J. Gimbun; T. S. Y. Choong and A. Fakhru’l-razi (2003): Numerical prediction of cyclone pressure drop. Journal of Chemical Engineering and Environment, 2(2): 67-71. Cooper, C. D. and F. C. Alley (2002): Air Pollution Control, A Design Approach, 3rd ed. Prospect Heights, Ill.: Waveland.
Cortés, C. and A. Gil (2007): Modeling the gas and particle flow inside cyclone separators. Progress in Energy and Combustion Science, 33(5): 409-452. Demir, S.; A. Karadeniz and M. Aksel (2016): Effects of cylindrical and conical heights on pressure and velocity fields in cyclones. Powder Technology, 295: 209-217. Dirgo, J., and D. Leith (1985): Performance of theoretically optimised cyclones. Filtration & Separation, 22: 119-125. El-Batsh, H. M. (2013): Improving cyclone performance by proper selection of the exit pipe. Applied Mathematical Modelling, 37: 5286-5303.
Elsayed, K. (2011): Analysis and optimization of cyclone separators geometry using RANS and LES methodologies. Ph.D. Thesis, Department of Mechanical Engineering, Faculty of Engineering, Vrije University. Brussel, Belgium.
Elsayed, K. and C. Lacor (2009): Investigation of the geometrical parameters effects on the performance and the flow-field of cyclone separators using mathematical models and large eddy simulation. 13th Aerospace Sciences & Aviation Technology (ASAT-13), Military Technical College, Cairo, Egypt. Ghasemi, J. and A. Niazi (2005): Tow- and three- way chemometrics methods applied for spectrophotometric determination of lorazepam in pharmaceutical formulations and biological fluids. Analytic Chimica Acta, 533: 169-177.
Hoffmann, A. C., and L. E. Stein (2008): Gas cyclones and swirl tubes: principles, design and operation. ISBN 978-3-540-74694. 22nd Edition, Springer Berlin Heidelberg, Germany. Iozia, D. L. and D. Leith (1990): The logistic function and cyclone fractional efficiency. Aerosol Science and Technology, 12(3): 598-606. Jachner, S.; K. G. van den Boogaart and T. Petzoldt (2007): Statistical methods for the qualitative assessment of dynamic models with time delay (R Package qualV). Journal of Statistical Software, 22(8): 1-30.
Ji, Z. L.; X. L. Wu and M. X. Shi (1991): Experimental research on the natural turning length in the cyclone. Proceedings of Filtech Europa 91 Conference, Karlsruhe, Germany, 2: 583-589. Juengcharoensukying, J.; K. Poochinda and B. Chalermsinsuwan (2017): Effects of cyclone vortex finder and inlet angle on solid separation using CFD simulation. Energy Procedia, 138: 1116-1121. Lapple, C. E. (1950): Gravity and centrifugal separation. American Industrial Hygiene Association Quarterly, 11: 40-48. c. f. Sakura G. B. and A. Y. T. Leung (2015): Experimental study of particle collection efficiency of cylindrical inlet type cyclone separator. International Journal of Environmental Science and Development, 6(3): 160-164. Lapple, C. E. (1951a): Processes use many collector types. Chemical Engineering, 58: 144-151. Lapple, C. E. (1951b): Dust and mist collection. Air Pollution Abatement Manual, Manufacturing Chemists Association, Washington, D.C. USA. c. f. Surjosatyo, A.; A. Respati and H. Dafiqurrohman (2017): Analysis of the influence of vortexbinder dimension on cyclone separator performance in biomass gasification system. Procedia Engineering, 170: 154-161. Leith, D. and W. Licht (1972): The collection efficiency of cyclone type particle collectors - A new theoretical approach. American Institute of Chemical Engineers journal, Symposium Series, 126(68): 196-206.
Obermair, S.; J. Woisetschlager and G. Staudinger (2003): Investigation of the flow pattern in different dust outlet geometries of a gas cyclone by laser doppler anemometry. Powder Technol., 138: 239-251. Palma, R. L. (1978): Slide-mounting of Lice: A detailed description of the Canada Balsam technique. The New Zealand Entomologist, 6(4): 432-436.
Pandya, D. (2010): A low cost micro scale cyclone separator- design and computational fluid dynamics analysis. M.Sc. Thesis, aerospace engineering, UMI 1480855, University of texas at arlington, USA. PP: 63. Qian, F.; J. Zhang and M. Zhang (2006): Effects of the prolonged vertical tube on the separation performance of a cyclone. Journal of Hazardous Materials, B136: 822-829. Rietema, K. (1959): Het mechanisme van de afscheiding van fijnverdeelde stoffen in cyclonen (in dutch). De Ingenieur, 71(39): 59-65. C. f. Elsayed, K. (2011): Analysis and optimization of cyclone separators geometry using RANS and LES methodologies. Ph.D. Thesis, Department of Mechanical Engineering, Faculty of Engineering, Vrije University. Brussel, Belgium.
Schnell, K. B. and C. A. Brown (2002): Cyclone design. Air pollution control technology, Chapter 21. Handbook, Edited by Frank, K., CRC Press LLC, Florida, USA.
Shepherd, C. B. and C. E. Lapple (1939): Air pollution control: A design approach, In Cyclones. 2nd Edition, Woveland Press Inc., Illinois, USA. Pp 127-139. Spatz, C. (2008): Basic statistics: Tales of distributions. 9th Edition, Belmont, CA: Thomson Wadsworth, ISBN- 10: 0-495-50218-9. USA.
Swaray, M. S. G. and F. Hamdullahpur (2004): A new semi-empirical model for predicting particulate collection effciency in low-to-high temperature gas cyclone separators. Advanced Powder Technol., 15(2): 137-164. Tan, Z. (2008): An analytical model for the fractional efficiency of a uniflow cyclone with a tangential inlet. Powder Technology, 183: 147-151. Tantar, A. A.; E. Tantar; P. Bouvry; P. Del Moral; P. Legrand; C. A. C. Coello and O. Schütze (2014): EVOLVE-A bridge between probability, set oriented numerics and evolutionary computation. Springer International Publishing Switzerland. e-ISBN 978-3-319-07494-8. PP: 414.
Wang, B.; D. Xu; K. Chu and A. Yu (2006): Numerical study of gas–solid flow in a cyclone separator. Applied Mathematical Modelling, 30: 1326-1342.
Wang, L. (2004): Theoretical study of cyclone design, Ph.D. Thesis, Texas A&M University, College Station, USA. PP: 137. Wang, L.; C. B. Parnell; B. W. Shaw and R. E. Lacey (2003): Analysis of cyclone collection efficiency. ASAE Annual International Meeting, Paper Number: 034114. pp: 1-10. Yeung, E. C. T.; C. Stasolla; M. J. Sumner and B. Q. Huang (2015): Plant microtechniques and protocols. ISBN 978-3-319-19944-3 (eBook). Canada.
Zhu, Y. and K. Lee (1999): Experimental study on small cyclones operating at high flowrates. Journal of Aerosol Science, 30: 1303-1315. | ||||
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