Heat Transfer in a Liquid-Solid Circulating Fluidized Bed Reactor with Low Surface Tension Media

doi:10.1016/S1004-9541(13)60556-X

Chin.J.Chem.Eng. ›› 2013, Vol. 21 ›› Issue (8): 844-849.DOI: 10.1016/S1004-9541(13)60556-X

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Heat Transfer in a Liquid-Solid Circulating Fluidized Bed Reactor with Low Surface Tension Media

H. R. Jin¹, H. Lim¹, D. H. Lim¹, Y. Kang¹, Ki-Won Jun²

1 Chemical Engineering, Chungnam National University, Daejeon, Korea;
2 Korea Chemical Technology Division, Korea Research Institute of Chemical Technology, Daejeon, Korea

Received:2011-11-15 Revised:2012-07-12 Online:2013-08-24 Published:2013-08-28
Supported by:
Supported by Korea Institute of Energy Technology Evaluation and Planning (KETEP) and GTL Technology Development Consortium (Korean National Oil Corp., Korea Gas Corp., Daelim Industrial Co. and Hyundai Engineering Co.) under "Energy Efficiency & Resources Programs" of the Ministry of Knowledge Economy, Republic of Korea.

Heat Transfer in a Liquid-Solid Circulating Fluidized Bed Reactor with Low Surface Tension Media

H. R. Jin¹, H. Lim¹, D. H. Lim¹, Y. Kang¹, Ki-Won Jun²

1 Chemical Engineering, Chungnam National University, Daejeon, Korea;
2 Korea Chemical Technology Division, Korea Research Institute of Chemical Technology, Daejeon, Korea

通讯作者: Y. Kang
基金资助:
Supported by Korea Institute of Energy Technology Evaluation and Planning (KETEP) and GTL Technology Development Consortium (Korean National Oil Corp., Korea Gas Corp., Daelim Industrial Co. and Hyundai Engineering Co.) under "Energy Efficiency & Resources Programs" of the Ministry of Knowledge Economy, Republic of Korea.

Abstract

Abstract: Heat transfer characteristics between the immersed heater and the bed content were studied in the riser of a liquid-solid circulating fluidized bed, whose diameter and height were 0.102 m (ID) and 2.5 m, respectively. Effects of liquid velocity, particle size, surface tension of liquid phase and solid circulation rate on the overall heat transfer coefficient were examined. The heat transfer coefficient increased with increasing particle size or solid circulation rate due to the higher potential of particles to contact with the heater surface and promote turbulence near the heater surface. The value of heat transfer coefficient increased gradually with increase in the surface tension of liquid phase, due to the slight increase of solid holdup. The heat transfer coefficient increased with the liquid velocity even in the higher range, due to the solid circulation prevented the decrease in solid holdup, in contrast to that in the conventional liquid-solid fluidized beds. The values of heat transfer coefficient were well correlated in terms of dimensionless groups as well as operating variables.

Key words: heat transfer coefficient, liquid-solid, circulating fluidized bed, liquid surface tension, solid circulation rate, particle size

摘要： Heat transfer characteristics between the immersed heater and the bed content were studied in the riser of a liquid-solid circulating fluidized bed, whose diameter and height were 0.102 m (ID) and 2.5 m, respectively. Effects of liquid velocity, particle size, surface tension of liquid phase and solid circulation rate on the overall heat transfer coefficient were examined. The heat transfer coefficient increased with increasing particle size or solid circulation rate due to the higher potential of particles to contact with the heater surface and promote turbulence near the heater surface. The value of heat transfer coefficient increased gradually with increase in the surface tension of liquid phase, due to the slight increase of solid holdup. The heat transfer coefficient increased with the liquid velocity even in the higher range, due to the solid circulation prevented the decrease in solid holdup, in contrast to that in the conventional liquid-solid fluidized beds. The values of heat transfer coefficient were well correlated in terms of dimensionless groups as well as operating variables.

关键词: heat transfer coefficient, liquid-solid, circulating fluidized bed, liquid surface tension, solid circulation rate, particle size

H. R. Jin, H. Lim, D. H. Lim, Y. Kang, Ki-Won Jun. Heat Transfer in a Liquid-Solid Circulating Fluidized Bed Reactor with Low Surface Tension Media[J]. Chin.J.Chem.Eng., 2013, 21(8): 844-849.

H. R. Jin, H. Lim, D. H. Lim, Y. Kang, Ki-Won Jun. Heat Transfer in a Liquid-Solid Circulating Fluidized Bed Reactor with Low Surface Tension Media[J]. Chinese Journal of Chemical Engineering, 2013, 21(8): 844-849.

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Heat Transfer in a Liquid-Solid Circulating Fluidized Bed Reactor with Low Surface Tension Media

Heat Transfer in a Liquid-Solid Circulating Fluidized Bed Reactor with Low Surface Tension Media

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