Journal of Failure Analysis and Prevention

, Volume 16, Issue 5, pp 738–746 | Cite as

The Study of Performance in a Novel Gas–Solid Separator

  • Zhiliang Zhang
  • Chenglin E
  • Chunxi Lu
Technical Article---Peer-Reviewed


The three slit-type separator is a new separator which can shorten the residence time of oil & gas and improve the separation efficiency. In this study, a critical validation was carried out to examine the separation performances of the three slit-type separator with different inlet velocity and inlet concentration. According to the experimental results, the separation efficiency and pressure drop of the three slit-type separator increase with the increase of inlet velocity and inlet concentration. Numerical simulation of the gas–solid flow field in the three slit-type separator was carried out by the use of Fluent 15.0 platform. The simulated results coincide with the experimental results. The particles move along the inside wall of the separator in the vaulted space, meanwhile, more gas enters into the exhaust pipe through slots, which can improve the separation efficiency. The study shows that the residence time of oil and gas is less than 0.6 and the separation efficiency is up to 99% in the separator, in addition, the pressure drop could be controlled in 4 kPa below.


Gas–solid separator Flow field Numerical simulation Experimental research 

List of Symbols


Entrance dust concentration (kg/m3)

cε1, cε2



Hydraulic diameter of rectangular inlet cross section (m)


Particle diameter (m)


Acceleration of gravity (m/s2)


Turbulence generated item (kg/ms3)


Height (m)


Turbulence intensity


Fluid turbulent kinetic energy (m2/s2)


Length (m)


Quality (kg)


Turbulence characteristic length (m)


Fluid pressure (N)

Pii, Pij

Source term generation entry


Central tube radius (m)


Splitter shell radius (m)




Source term


Absolute temperature (K)


Time (s)


Tangential velocity (m/s)


Radial velocity (m/s)

ui, uj

Fluid velocity in the \(i\), \(j\) direction(m/s)


Average fluid velocity in the \(i\), \(j\) direction (m/s)


Fluid velocity ripple in the \(i\), \(j\) direction (m/s)


Inlet velocity (m/s)

x, y, z

General coordinate (m)


Turbulent kinetic energy dissipation rate (m2/s3)


Viscous dissipation term


Universal variable


Fluid density(kg/m3)


Effective viscosity coefficient(Pa s)


Source term generation entry


Diffusivity (m2/s)

σk, σε, σφ

Constant corresponding equations


Von Karman constant



The authors acknowledge the financial support by MOE Key Laboratory of “oil and gas equipment” open projects (X151514KJD10).


  1. 1.
    F. Zhao, catapult-style gsa-solid separator application on FCCU. Pet. Process. Petrochem. 29(02), 1–5 (1986)Google Scholar
  2. 2.
    C. Lu, Z. Cai, M. Shi, Experimental study and industry application of a new vortex quick separation system at FCCU riser outlet. Acta Pet. Sin. (Pet. Process. Sect.) 20(3), 24–29 (2004)Google Scholar
  3. 3.
    Chinese FCCU Co-opretion, 30 Years of Chinese FCCU (China Petrochemical Press, Bejing, 1995)Google Scholar
  4. 4.
    G.P. Quinn, M.A. Silverman, FCC reactor product-catalyst separation ten years of commercial experience with closed cyclones. NPRA meeting, AM-95-37 (1995)Google Scholar
  5. 5.
    J. Krambeck Frederick, W. Schatz Klaus, Closed reactor FCC system with provisions for surge capacity. USP: 4579716, 1986-04-01Google Scholar
  6. 6.
    I.B. Cetinkaya, Palatine. Disengager stripper. C10G 11/00,5158699, USP (1992)Google Scholar
  7. 7.
    I.B. Cetinkaya, Palatine. External integrated disengager stripper and its use in fluidized catalytic cracking process. C10G 11/18, 5314611, USP (1994)Google Scholar
  8. 8.
    I.B. Cetinkaya, External integrated disengager stripper and its use in fluidized catalytic cracking process. USP: 5314611, 1994-05-24Google Scholar
  9. 9.
    Z. Cao, M. Shi, G. Sun et al., Fast gas-solid separation and gas leaving of riser reaction system. ZL: 96103419. X, 1996-03-22Google Scholar
  10. 10.
    Z. Cao, M. Shi, G. Sun et al., Method and equipment for votex type fast gas-solid separation and gas leaving of riser reaction system. ZL: 96103478. 5, 1996-03-22Google Scholar
  11. 11.
    C. Lu, M. Shi, K. Xu, Fast gas-solid separation method and equipment of dense particle phase annular flow pre-stipper riser outlet. ZL: 98102166. 2, 1998-05-21Google Scholar
  12. 12.
    C. Lu, G. Xu, S. Lu et al., Study and industry application of a pre-stripping separation system for riser termination of FCCU. Pet. Process. Petrochem. 33(1), 33–37 (2002)Google Scholar
  13. 13.
    X. Liu, Research on the Novel FCC Regenrator with a Post Coke-burning Riser and Its Separator (China University of Petroleum, Bejing, 2005), pp. 1–5Google Scholar
  14. 14.
    X. Liu, C. Lu, M. Shi, Experimental research of the flow field in a novel gas–solids separator. J. Chem. Eng. Chin. Univ. 20(6), 875–881 (2006)Google Scholar
  15. 15.
    C. Yan, Numerical simulation of flow field in a novel gas-solids separator. J. Chem. Eng. Chin. Univ. 21(3), 392–397 (2007)Google Scholar
  16. 16.
    Z. Cao, SHI Ming-xian.Calculation of the gas flow field and the performance of the vortex separation system. Pet. Process. Petrochem. 28(1), 10–15 (1997)Google Scholar
  17. 17.
    F. Sun, C. Lu, M. Shi, Numerical simulation and analysis of gas flow field in vortex quick separation system of FCC disengager. J. Chem. Ind. Eng. (China) 56(1), 16–23 (2005)Google Scholar
  18. 18.
    L. Chu, W. Chen, X. Lee, Effects of geometric and operating parameters and feed characters onthe motion of solid particles in hydrocyclones. Sep. Purif. Technol. 26(2–3), 237–246 (2002)CrossRefGoogle Scholar
  19. 19.
    S. Xie, Y. Zhu, Y. Song, Application of the vortex quick separation system on the second catalytic cracking unit. Pet. Ind. Technol. 11(2), 8–10 (2004)Google Scholar
  20. 20.
    L. Zhou, Theory and Numerical Modeling of Turbulent Gas-Particle Flows and Combustion (Science Press, Beijing, 1994), pp. 37–45Google Scholar
  21. 21.
    L. Hu, M. Shi, L. Zhou et al., Numerical simulation of 3-D strongly swirling turbulent flow in a cyclone separator. J. Tsinghua Univ. (Sci. Technol.) 44(11): 1501–1504, 1508 (2004)Google Scholar
  22. 22.
    Q. Chen, Super Short Quick Separator System at Outlet of a FCC Riser with Dense Particle Phase Annular Flow Pre-stipper (China University of Petroleum, Bejing, 2008), p. 48Google Scholar
  23. 23.
    M.P. Sharma, C.T. Crowe, A numerical model for gas-particle flow through an orifice. Math. Model. 9(9), 691–700 (1987)CrossRefGoogle Scholar

Copyright information

© ASM International 2016

Authors and Affiliations

  1. 1.State Key Laboratory of Heavy Oil ProcessingChina University of PetroleumBeijingChina
  2. 2.School of Mechanical EngineeringSouthwest Petroleum UniversityChengduChina

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