Particle motion in the CFB riser with special emphasis on PEPT-imaging of the bottom section

Powder Technology

Volumn 196, Issue 3, 2009, Pages 318-325

  Chan, Chian W ^a   Seville, Jonathan ^a   Yang, Zhufang ^b   Baeyens, Jan ^a  

^a UNIVERSITY OF WARWICK   (United Kingdom)

^b UNIVERSITY OF NOTTINGHAM   (United Kingdom)

Author keywords

Acceleration length; Acceleration time; Dense bed; Dilute conveying; Positron Emission Particle Tracking

Indexed keywords

ACCELERATION LENGTH; ACCELERATION TIME; DENSE BED; DILUTE CONVEYING; POSITRON EMISSION PARTICLE TRACKING;

ACCELERATION; EQUATIONS OF MOTION; FLUID DYNAMICS; FLUIDIZATION; FLUIDIZED BED PROCESS; FLUIDIZED BEDS; HYDRODYNAMICS; PARTICLE BEAM TRACKING; POSITRONS;

TIME AND MOTION STUDY;

ACCELERATION; ACCURACY; ARTICLE; CALCULATION; FLUIDIZED BED; GAS; HYDRODYNAMICS; IMAGING; POSITRON; SOLID; TIME;

EID: 70349446456     PISSN: 00325910     EISSN: None     Source Type: Journal    
DOI: 10.1016/j.powtec.2009.08.019     Document Type: Article

References (50)

1. Adánez J.P., de Deigo L.F., and Gayán P. Transport velocities of coal and sand particles. Powder Technology 77 (1993) 61-68
2. Bi H.T., and Fan L.S. Regime transitions in gas-solid circulating fluidized beds. A.I.Ch.E. Annual Meeting (1991), AIChE, Los Angeles 17-22
3. Bi H.T., and Fan L.S. Existence of turbulent regime in gas-solid fluidization. AIChE Journal 38 (1992) 297-301
4. Bi H.T., Zhou J., Qin S.Z., and Grace J.R. Annular wall thickness in circulating fluidized bed risers. Canadian Journal of Chemical Engineering 74 (1996) 811-814
5. Bi H.T., and Grace J.R. Flow regime diagrams for gas-solid fluidization and upward transport. International Journal of Multiphase Flow 21 (1995) 1229-1236
6. Chan C.W., Seville J.P.K., Fan X., Dewil R., and Baeyens J. CFB cyclones: pressure drop and particle motion, viewed by positron emission particle tracking. Proceedings of Circulating Fluidized Bed IX, Hamburg, Germany (2008) 981-986
7. Chan C.W., Seville J.P.K., Fan X., and Baeyens J. Particle motion in L-valve as observed by Positron Emission Particle Tracking. Powder Technology 193 (2009) 137-149
8. Chan C.W., Seville J.P.K., Fan X., and Baeyens J. Particle motion in CFB cyclones as observed by Positron Emission Particle Tracking. Industrial and Engineering Chemistry Research 48 (2009) 253-261
9. Chan C.W., Seville J.P.K., Fan X., and Baeyens J. Solid particle motion in a standpipe as observed by Positron Emission Particle Tracking. Powder Technology 194 (2009) 137-149
10. Chehbouni A., Chaouki J., Guy C., and Klvana D. Effets de differents parameters sur les vitesses de transition de la fluidisation en regime turbulent. Canadian Journal of Chemical Engineering 73 (1995) 41-50
11. Clift R., and Gauvin W.H. Motion of entrained particles in gas streams. Canadian Journal of Chemical Engineering 49 (1971) 439
12. Di Felice R. The voidage function for fluid particle interaction systems. International Journal of Multiphase Flow 20 (1994) 153
13. 18F uptake in a single particle for positron emission particle tracking through modification of solid surface chemistry. Nuclear Instruments and Methods A 558 (2006) 542-546
14. Fan X., Parker D.J., and Smith M.D. Labelling a single particle for positron emission particle tracking using direct activation and ion-exchange techniques. Nuclear Instruments and Methods A 562 (2006) 345-350
15. Grace J.R., Issangya A.S., Bai D., and Bi H. Situating the high density circulating fluidized bed. AIChE 45 (1999) 2108-2116
16. Gupta S.K., and Berruti F. Modeling considerations for large scale high density risers. In: Fan L.S., and Knowlton T.M. (Eds). Fluidization IX (1998), Engineering Foundation, New York 189-194
17. Harris A.T., Thorpe R.B., and Davidson J. Characterisation of the annular film thickness in circulating fluidized risers. Chemical Engineering Science 57 (2002) 2579-2587
18. M. Horn, H.J. Schmid, A comprehensive approach in modelling Lagrangian particle deposition in turbulent layers, Powder Technology 186 (2008), p. 189-198.
19. Issangya A.S., Bai D., Grace J.R., and Zhu J. Solids flux profiles in a high density circulating fluidized bed riser. In: Fam L.S., and Knowlton T.M. (Eds). Fluidization IX (1998), Engineering Foundation, New York 197-204
20. Johansson A., Johnsson F., and Leckner B. Solids back-mixing in CFB boilers. Chemical Engineering Science 62 (2007) 561-573
21. Johnson R.W. The Handbook of Fluid Dynamics (1998), Springer 18-23
22. Karri S.B.R., and Knowlton T.M. A comparison of annulus solids flow direction and radial solids mass flux profiles at low and high mass fluxes in a riser. In: Werther J. (Ed). Circulating Fluidized Bed Technology VI (1999), DECHEMA, Germany 71-76
23. Kürten H., Raasch J., and Rumph H. Chemie Ingenieur Techmark', 38, 941. The Drag Force in Two-fluid Models of Gas-solid Flows. In: Zhang Y., and Reese J.M. (Eds). Chemical Engineering Science vol. 58 (1966) 1641
24. Kim S.W., Kirbas G., Bi H., Lim C.J., and Grace J.R. Flow structure and thickness of annular downflow layer in a circulating fluidised bed. Powder Technology 142 (2004) 48-58
25. Kim S.W., Kirbas G., Bi H., Lim C.J., and Grace J.R. Flow behaviour and regime transition in a high-density circulating fluidized bed riser. Chemical Engineering Science 59 (2004) 3955-3963
26. Laín, and Sommerfeld. Euler/Lagrange computations of pneumatic conveying in a horizontal channel with different wall roughness. Powder Technology 184 (2008) 76-88
27. Lee G.S., and Kim S.D. Bed expansion characteristics and transition velocity in turbulent fluidized-beds. Powder Technology 62 (1990) 207-215
28. Mabrouk R., Chaouku J., and Guy C. Effective drag coefficient investigation in the acceleration zone of an upward gas-solid flow. Chemical Engineering Science 62 (2007) 318-327
29. Mori S., Hashimoto O., Haruta T., Mochizuki K., Matsutani W., Hiraoka S., Yamada I., Kojima T., and Tuji K. Turbulent fluidization processes. In: Basu P., and Large J.F. (Eds). Circulating Fluidized Bed Technology (1986), Pergamon Press 115-122
30. Mori S., Hashimoto O., Haruta T., Mochizuki K., Matsutani W., Hiraoka S., Yamada I., Kojima T., and Tuji K. Turbulent fluidization processes. In: Basu P., and Large J.F. (Eds). Circulating Fluidized Bed Technology (1986), Pergamon Press 115-122
31. Ouyong S., and Potter O.E. Consistency of circulating fluidized bed experimental data. Industrial and Engineering Chemistry Research 32 (1993) 1041-1045
32. Parker D.J., Allen D.A., Benton D.M., Fowles P., McNeil P.A., Tan M., and Beynon T.D. Developments in particle tracking using the Birmingham Positron Camera. Nuclear Instruments and Methods A 292 (1997) 421-426
33. Patience G.S., Chaouki J., Berruti F., and Wong R. Scaling considerations for circulating fluidized bed risers. Powder Technology 72 (1992) 31-37
34. Patience G.S., and Chaouki J. Gas phase hydrodynamics in the riser of a circulating fluidized bed. Chemical Engineering Science 48 (1993) 3195-3205
35. Perales J.F., Coll T., Llop M.F., Puigjaner L., Arnaldos J., and Casal J. On the transition from bubbling to fast fluidization regimes. In: Basu P., Horio M., and Hasatani M. (Eds). Circulating Fluidized Bed Technology III (1991), Pergamon Press, Oxford, UK
36. Pugsley T.S., and Berruti F. A predictive model for circulating fluidized bed risers. Powder Technology 89 (1996) 57-69
37. Rhodes M.J., and Geldart D. The upward flow of gas/solids suspensions. Part 1: a model for circulating fluidised beds incorporating duel level entry into the riser. Chemical Engineering Research and Design 67 (1989) 20-29
38. Seville J.P.K., Ingram A., and Parker D.J. Probing processes using positrons. Transactions of the Institution of Chemical Engineers 83 A7 (2005) 788-793
39. Smolders K., and Baeyens J. The axial and radial solid loadings up the CFB-riser. Chinese Journal of Chemical Engineering 8 (2000) 171-175
40. K. Smolders, J. Baeyens, Gas fluidized bed operating at high velocities: a critical review of occurring regimes, Powder Technology 119 (2001a), p. 269-291.
41. Smolders K., and Baeyens J. Hydrodynamic modelling of the axial density profile in the riser of a low density CFB. Canadian Journal of Chemical Engineering 79 (2001) 422-429
42. Tannous K. Contribution à l'Etude Hydrodynamique des Lits Fluidisés de Grosses Particules (1993), Institut National Polytechnique de Toulouse, France
43. Van de Velden M., Baeyens J., and Smolders K. Solids mixing in the riser of a circulating fluidized bed. Chemical Engineering Science 62 8 (2007) 2139-2153
44. Van de Velden M., Baeyens J., Seville J.P.K., and Fan X. The solids flow in the riser of a CFB viewed by Positron Emission Particle Tracking (PEPT). Powder Technology 183 (2008) 290-296
45. Van de Velden M., Chan C.W., Seville J.P.K., Fan X., Parker D., and Baeyens J. The solids flow in the riser of a CFB viewed by positron emission particle tracking. Proceedings 9th International Conference on Circulating Fluidized Beds, Hamburg, Germany (2008) 67-74
46. Wang S., Li X., Lu H., Yu L., Ding J., and Yong Z. DSMC prediction of granular temperatures of clusters and dispersed particles in a riser. Powder Technology 192 (2009) 225-233
47. Weinstein H., and Li J. An evaluation of the actual density in the acceleration section of vertical risers. Powder Technology 57 (1989) 77-79
48. Wong R., Pugsley T., and Berruti F. Modelling the axial voidage profile and flow structure in risers of circulating fluidized beds. Chemical Engineering Science 47 (1992) 2301-2306
49. Zhang W., Johnsson F., and Leckner B. Fluid-dynamic boundary layers in CFB boilers. Chemical Engineering Science 50 (1995) 201-210
50. Grace J.R. Reflections on turbulent fluidization and dense suspension upflow. Powder Technology 113 (2000) 242-248