The solid flow structure in a circulating fluidized bed riser/downer of 0.42-m diameter

Powder Technology

Volumn 129, Issue 1-3, 2003, Pages 46-52

  Zhang, Minghui ^a   Qian, Zhen ^a   Yu, Hao ^a   Wei, Fei ^a  

^a TSINGHUA UNIVERSITY   (China)

Author keywords

Downer; Large scale; Probability density distribution (PDD); Riser; Solid flow structure

Indexed keywords

AGGLOMERATION; LASER DOPPLER VELOCIMETERS; PARTICLES (PARTICULATE MATTER); PROBABILITY DENSITY FUNCTION;

PARTICLE VELOCITY SIGNALS;

FLUIDIZED BEDS;

DOWNER; FLOW PATTERN; FLUIDIZED BED; PROBABILITY DENSITY FUNCTION; RISER; SOLID FLOW;

ARTICLE; CHEMICAL STRUCTURE; DENSITY; DEVICE; FLOW RATE; FLUIDIZATION; GRAVITY; LASER FLOWMETER; SOLID STATE; VELOCITY;

EID: 0037425443     PISSN: 00325910     EISSN: None     Source Type: Journal    
DOI: 10.1016/S0032-5910(02)00130-4     Document Type: Article

References (14)

1. Zhu J.X., Yu Z.Q., Grace J.R., Issangya A. Cocurrent downflow circulating fluidized-bed (Downer) reactors - a state-of-the-art review. Can. J. Chem. Eng. 73(5):1995;662-677.
2. Yang Y.R., Rong S.X., Chen G.T. Theoretical and experimental research on turbulent fluidized bed. The 5th National Conference on Fluidization (in Chinese). 1990;18-21 Tsinghua University Press, Beijing.
3. Soong C.H., Tuzla K., Chen J.C. The identification of particle clusters in circulating fluidized bed. Circ. Fluid. Bed Technol. IV:1994;615-620.
4. Bai D., Issangya Y.S., Grace J.R. Characteristics of gas-solids fluidized beds in different flow regimes. Ind. Eng. Chem. Res. 38:1999;803-811.
5. Lin Q., Wei F., Jin Y. Transient density signal analysis and two-phase micro-structure flow in gas-solids fluidization. Chem. Eng. Sci. 56:2001;2179-2189.
6. Tuzla K., Sharma A.K., Chen J.C., Schiewe T., Wirth K.E., Molerus O. Transient dynamics of solid concentration in downer fluidized bed. Powder Technol. 100:1998;166-172.
7. Krol S., Pekediz A., de Lasa H. Particle clustering in down flow reactors. Powder Technol. 108:2000;6-20.
8. Wei F., Zhu J.X. Effect of flow direction on axial solid dispersion in gas-solids cocurrent upflow and downflow systems. Chem. Eng. J. 64:1996;345-352.
9. Zhang W., Tung Y., Johnsson F. Radial voidage profiles in fast fluidized beds of different diameters. Chem. Eng. Sci. 46:1991;3045-4052.
10. Wei F., Lin H.F., Cheng Y., Wang Z.W., Jin Y. Profiles of particle velocity and solids fraction in a high-density riser. Powder Technol. 100:1998;183-189.
11. Tsuji Y., Morikawa Y. LDV measurement of an air-solid two-phase flow in a horizontal pipe. J. Fluid Mech. 120:1982;385-409.
12. Hartge E.U., Rensner D., Werther J. Solids concentration and velocity patterns in circulating fluidized beds. Basu P., Large J.F. Circulating Fluidized Bed Technology II. 1988;165-180 Pergamon Press, Oxford.
13. Wang Z.W., Bai D.R., Jin Y. Hydrodynamics of cocurrent downflow circulating fluidized bed (CDCFB). Powder Technol. 70:1992;271-275.
14. Cao C.S., Jin Y., Yu Z.Q., Wang Z.W. The gas-solids velocity profiles and slip phenomenon in a concurrent downflow circulating fluidized bed. Circ. Fluid. Bed Technol. IV:1994;406-413.