Cold Model Experimental Research on Particle Velocity Distribution in Gas-Solid Circulating Fluidized Bed for Methanol-to-Olefins Process
Radial profiles of particle velocities were investigated
in a 6.1m high methanol-to-olefins cold model experimental device
using a TSI laser Doppler velocimeter. The effect of axial height on
flow development was not obvious in fully developed region under the
same operating condition. Superficial gas velocity and solid
circulating rate had significant influence on particle velocity in the
center region of the riser. Besides, comparisons among rising,
descending and average particle velocity were conducted. The particle
average velocity was similar to the rising particle velocity and higher
than the descending particle velocity in radial locations except the wall
region of riser.
[1] A. Yan and J. Zhu, "Scale-Up Effect of Riser Reactors (1): Axial and
Radial Solids Concentration Distribution and Flow Development," Ind.
Eng. Chem. Res., vol. 43, pp. 5810-5819, 2004.
[2] J. J. Nieuwland, R. Meijer, J. A. M. Kuipers, and W. P. M. van Swaaij,
"Measurements of solids concentration and axial solids velocity in
gas-solid two-phase flows," Powder Technol., vol. 87, pp. 127-139, 1996. [3] A. S. Issangya, D. Bai, H. T. Bi, K. S. Lim, J. Zhu, and J. R. Grace,
"Suspension densities in a high-density circulating fluidized bed riser,"
Chem. Eng. Sci., vol. 54, pp. 5451-5460, 1999.
[4] D. Bai, A. S. Issangya, and J. R. Grace, "Characteristics of Gas-Fluidized
Beds in Different Flow Regimes," Ind. Eng. Chem. Res., vol. 38, pp.
803-811, 1999.
[5] Q. Geng, X. Zhu, Y. Liu, Y. Liu, C. Li, and X. You, "Gas–solid flow
behavior and contact efficiency in a circulating-turbulent fluidized bed,"
Powder Technol., vol. 245, pp. 134-145, 2013.
[6] Z. Q. Li, C. N. Wu, F. Wei, and Y. Jin, "Experimental study of
high-density gas–solids flow in a new coupled circulating fluidized bed,"
Powder Technol., vol. 139, pp. 214-220, 2004.
[7] J. H. Pärssinen and J. X. Zhu, "Particle velocity and flow development in
a long and high-flux circulating fluidized bed riser," Chem. Eng. Sci., vol.
56, pp. 5295-5303, 2001.
[8] X. Qi, H. Zhu, and J. Zhu, "Demarcation of a new circulating turbulent
fluidization regime," AIChE J., vol. 55, pp. 594-611, 2009.
[9] B. Wang, T. Li, Q. W. Sun, W. Y. Ying, and D. Y. Fang, "Experimental
Study on Flow Behavior in a Gas-Solid Fluidized Bed for the
Methanol-to-Olefins Process," Chem. Eng. Technol., vol. 33, pp.
1591-1600, 2010.
[10] J. H. Pärssinen and J. X. Zhu, "Axial and radial solids distribution in a
long and high-flux CFB riser," AIChE J., vol. 47, pp. 2197-2205, 2001.
[11] S. W. Kim, G. Kirbas, H. Bi, C. Jim Lim, and J. R. Grace, "Flow behavior
and regime transition in a high-density circulating fluidized bed riser,"
Chem. Eng. Sci., vol. 59, pp. 3955-3963, 2004.
[12] A. S. Issangya, J. R. Grace, D. Bai, and J. Zhu, "Further measurements of
flow dynamics in a high-density circulating fluidized bed riser," Powder
Technol., vol. 111, pp. 104-113, 2000.
[13] H. Zhu and J. Zhu, "Gas-solids flow structures in a novel
circulating-turbulent fluidized bed," AIChE J., vol. 54, pp. 1213-1223,
2008.
[14] D. Geldart, "Types of gas fluidization," Powder Technol., vol. 7, pp.
285-292, 1973.
[15] A. Yan and J. Zhu, "Scale-up effect of riser reactors: Particle velocity and
flow development," AIChE J., vol. 51, pp. 2956-2964, 2005.
[16] A. Yan, J. Ball, and J. Zhu, "Scale-up effect of riser reactors (3) axial and
radial solids flux distribution and flow development," Chem. Eng. J., vol.
109, pp. 97-106, 2005.
[17] Y. Tsuji and Y. Morikawa, "LDV measurements of an air-solid two-phase
flow in a horizontal pipe," J. Fluid Mech., vol. 120, pp. 385-409, 1982.
[18] Y. Tsuji, Y. Morikawa, and H. Shiomi, "LDV measurements of an
air-solid two-phase flow in a vertical pipe," J. Fluid Mech., vol. 139, pp.
417-434, 1984.
[19] Y. Wang, F. Wei, Z. Wang, Y. Jin, and Y. Zhiqing, "Radial profiles of
solids concentration and velocity in a very fine particle (36 μm) riser,"
Powder Technol., vol. 96, pp. 262-266, 1998.
[20] F. Wei, H. Lin, Y. Cheng, Z. Wang, and Y. Jin, "Profiles of particle
velocity and solids fraction in a high-density riser," Powder Technol., vol.
100, pp. 183-189, 1998.
[1] A. Yan and J. Zhu, "Scale-Up Effect of Riser Reactors (1): Axial and
Radial Solids Concentration Distribution and Flow Development," Ind.
Eng. Chem. Res., vol. 43, pp. 5810-5819, 2004.
[2] J. J. Nieuwland, R. Meijer, J. A. M. Kuipers, and W. P. M. van Swaaij,
"Measurements of solids concentration and axial solids velocity in
gas-solid two-phase flows," Powder Technol., vol. 87, pp. 127-139, 1996. [3] A. S. Issangya, D. Bai, H. T. Bi, K. S. Lim, J. Zhu, and J. R. Grace,
"Suspension densities in a high-density circulating fluidized bed riser,"
Chem. Eng. Sci., vol. 54, pp. 5451-5460, 1999.
[4] D. Bai, A. S. Issangya, and J. R. Grace, "Characteristics of Gas-Fluidized
Beds in Different Flow Regimes," Ind. Eng. Chem. Res., vol. 38, pp.
803-811, 1999.
[5] Q. Geng, X. Zhu, Y. Liu, Y. Liu, C. Li, and X. You, "Gas–solid flow
behavior and contact efficiency in a circulating-turbulent fluidized bed,"
Powder Technol., vol. 245, pp. 134-145, 2013.
[6] Z. Q. Li, C. N. Wu, F. Wei, and Y. Jin, "Experimental study of
high-density gas–solids flow in a new coupled circulating fluidized bed,"
Powder Technol., vol. 139, pp. 214-220, 2004.
[7] J. H. Pärssinen and J. X. Zhu, "Particle velocity and flow development in
a long and high-flux circulating fluidized bed riser," Chem. Eng. Sci., vol.
56, pp. 5295-5303, 2001.
[8] X. Qi, H. Zhu, and J. Zhu, "Demarcation of a new circulating turbulent
fluidization regime," AIChE J., vol. 55, pp. 594-611, 2009.
[9] B. Wang, T. Li, Q. W. Sun, W. Y. Ying, and D. Y. Fang, "Experimental
Study on Flow Behavior in a Gas-Solid Fluidized Bed for the
Methanol-to-Olefins Process," Chem. Eng. Technol., vol. 33, pp.
1591-1600, 2010.
[10] J. H. Pärssinen and J. X. Zhu, "Axial and radial solids distribution in a
long and high-flux CFB riser," AIChE J., vol. 47, pp. 2197-2205, 2001.
[11] S. W. Kim, G. Kirbas, H. Bi, C. Jim Lim, and J. R. Grace, "Flow behavior
and regime transition in a high-density circulating fluidized bed riser,"
Chem. Eng. Sci., vol. 59, pp. 3955-3963, 2004.
[12] A. S. Issangya, J. R. Grace, D. Bai, and J. Zhu, "Further measurements of
flow dynamics in a high-density circulating fluidized bed riser," Powder
Technol., vol. 111, pp. 104-113, 2000.
[13] H. Zhu and J. Zhu, "Gas-solids flow structures in a novel
circulating-turbulent fluidized bed," AIChE J., vol. 54, pp. 1213-1223,
2008.
[14] D. Geldart, "Types of gas fluidization," Powder Technol., vol. 7, pp.
285-292, 1973.
[15] A. Yan and J. Zhu, "Scale-up effect of riser reactors: Particle velocity and
flow development," AIChE J., vol. 51, pp. 2956-2964, 2005.
[16] A. Yan, J. Ball, and J. Zhu, "Scale-up effect of riser reactors (3) axial and
radial solids flux distribution and flow development," Chem. Eng. J., vol.
109, pp. 97-106, 2005.
[17] Y. Tsuji and Y. Morikawa, "LDV measurements of an air-solid two-phase
flow in a horizontal pipe," J. Fluid Mech., vol. 120, pp. 385-409, 1982.
[18] Y. Tsuji, Y. Morikawa, and H. Shiomi, "LDV measurements of an
air-solid two-phase flow in a vertical pipe," J. Fluid Mech., vol. 139, pp.
417-434, 1984.
[19] Y. Wang, F. Wei, Z. Wang, Y. Jin, and Y. Zhiqing, "Radial profiles of
solids concentration and velocity in a very fine particle (36 μm) riser,"
Powder Technol., vol. 96, pp. 262-266, 1998.
[20] F. Wei, H. Lin, Y. Cheng, Z. Wang, and Y. Jin, "Profiles of particle
velocity and solids fraction in a high-density riser," Powder Technol., vol.
100, pp. 183-189, 1998.
@article{"International Journal of Chemical, Materials and Biomolecular Sciences:70348", author = "Yongzheng Li and Hongfang Ma and Qiwen Sun and Haitao Zhang and Weiyong Ying", title = "Cold Model Experimental Research on Particle Velocity Distribution in Gas-Solid Circulating Fluidized Bed for Methanol-to-Olefins Process", abstract = "Radial profiles of particle velocities were investigated
in a 6.1m high methanol-to-olefins cold model experimental device
using a TSI laser Doppler velocimeter. The effect of axial height on
flow development was not obvious in fully developed region under the
same operating condition. Superficial gas velocity and solid
circulating rate had significant influence on particle velocity in the
center region of the riser. Besides, comparisons among rising,
descending and average particle velocity were conducted. The particle
average velocity was similar to the rising particle velocity and higher
than the descending particle velocity in radial locations except the wall
region of riser.", keywords = "Circulating fluidized bed, laser doppler velocimeter,
particle velocity, radial profile.", volume = "9", number = "7", pages = "829-5", }
