International Journal of Vehicle Structures and Systems

Open Access Open Access  Restricted Access Subscription Access

Comparative Analysis of Various CFBC Cyclone Separator REPDS Profiles


Affiliations
1 Dept. of Mech. Engg, Kongu Engg. College, Perundurai, Erode, India
2 Dept. of Mech. Engg. Kongu Engg. College, Perundurai, Erode, India
 

   Subscribe/Renew Journal


In the last decade research on CFBC (Circulating Fluidized Bed Combustion Boiler) has been increased but research on cyclone separator has not been paid well attention. All the existing designs of cyclone separator were mainly concentrating on a single parameter that is collection efficiency. But this work mainly concentrates on other parameters like pressure drop and denudation rate. Previous works related to cyclone separator having REPDS (Reduced Pressure Drop Stick) suggest that 50% REPDS in the vortex finder gives the optimum results for all the existing cyclone models. Existing REPDS profile is only circular; we attempted to change the REPDS profile to polygon shapes like square, hexagonal. All the cyclone separators with different REPDS profile have been designed for flow rate of 500m3/hr with operating velocity of 15m/s. CFD (Computational Fluid Dynamics) analysis has been done with operating velocity ranging from 15m/s to 30m/s, using K-€ turbulence model. The results obtained in CFD analysis reveal that there is no much variation in pressure drop, but there is a drastic change in the denudation rate while operating CFBC cyclone separator twice the designed velocity. Thus REPDS can be included in vortex finder of cyclone separator with any polygon profiles as mentioned above.

Keywords

CFBC, CFD, Cyclone Separator, Denudation Rate, Pressure Drop, REPDS Profile.
User
Subscription Login to verify subscription
Notifications
Font Size

  • P. Basu. 2006. Combustion and Gasification in Fluidized Bed, CRC Press, 381-400. https://doi.org/10.1201/97814 20005158.

  • A.S. Kinkar, G.M. Dhote and R.R. Chokkar. 2015. CFD simulation on CFBC boiler, Int. J. Sci. Technol. Res., 4(2), 34-39.

  • J. Gimbun, T.G. Chuah, A. Fakhru and T.S.Y. Choong. 2005. The influence of temperature and inlet velocity on cyclone pressure drop : A CFD study, Chem. Eng. Process, 44, 7-12. https://doi.org/10.1016/j.cep.2004.03.005.

  • G. Ramachandran, D. Leith, J. Dirgo and H. Feldman. 1991. Cyclone optimization based on new empirical model for pressure drop, Aerosol Sci. Technol., 15, 135148. https://doi.org/10.1080/02786829108959520.

  • L. Wang and L. Ye. 2010. Reducing pressure drop in cyclones by a stick, Aerosol Sci. Technol., 31, 37-41.

  • R. Ramachandran and P. Sivakumar. 2015. Design and development of cyclone separator interconnected CFBC, J. Chem. Pharm. Sci., 6, 207-211.

  • T.G.C. Huah, J.O.G. Imbun, T.H.S.Y.C. Hoong and A.F.A.L.-R. Azi. 2003. Numerical prediction of cyclone pressure drop, J. Chem. Eng. Environ., 2(2), 67-71.

  • J. Chen, X. Lu, H. Liu and C. Yang. 2007. Effect of the bottom-contracted and edge-sloped vent-pipe on the cyclone separator performance, Chem. Eng. J., 129, 8590. https://doi.org/10.1016/j.cej.2006.11.005.

  • A. Raoufi, M. Shams, M. Farzaneh, and R. Ebrahimi. 2008. Numerical simulation and optimization of fluid flow in cyclone vortex finder, Chem. Eng. Process, 47, 128-137. https://doi.org/10.1016/j.cep.2007.08.004.


Abstract Views: 350

PDF Views: 153




  • Comparative Analysis of Various CFBC Cyclone Separator REPDS Profiles

Abstract Views: 350  |  PDF Views: 153

Authors

N. Prasanna
Dept. of Mech. Engg, Kongu Engg. College, Perundurai, Erode, India
R. Shanmuga Prakash
Dept. of Mech. Engg. Kongu Engg. College, Perundurai, Erode, India
M. Vijayakumar
Dept. of Mech. Engg. Kongu Engg. College, Perundurai, Erode, India

Abstract


In the last decade research on CFBC (Circulating Fluidized Bed Combustion Boiler) has been increased but research on cyclone separator has not been paid well attention. All the existing designs of cyclone separator were mainly concentrating on a single parameter that is collection efficiency. But this work mainly concentrates on other parameters like pressure drop and denudation rate. Previous works related to cyclone separator having REPDS (Reduced Pressure Drop Stick) suggest that 50% REPDS in the vortex finder gives the optimum results for all the existing cyclone models. Existing REPDS profile is only circular; we attempted to change the REPDS profile to polygon shapes like square, hexagonal. All the cyclone separators with different REPDS profile have been designed for flow rate of 500m3/hr with operating velocity of 15m/s. CFD (Computational Fluid Dynamics) analysis has been done with operating velocity ranging from 15m/s to 30m/s, using K-€ turbulence model. The results obtained in CFD analysis reveal that there is no much variation in pressure drop, but there is a drastic change in the denudation rate while operating CFBC cyclone separator twice the designed velocity. Thus REPDS can be included in vortex finder of cyclone separator with any polygon profiles as mentioned above.

Keywords


CFBC, CFD, Cyclone Separator, Denudation Rate, Pressure Drop, REPDS Profile.

References





DOI: https://doi.org/10.4273/ijvss.9.1.08