Solid circulation characteristics in an internally circulating fluidized bed with orifice-type draft tube |
| |
Authors: | Sang Done Kim Yo Han Kim Seon Ah Roh Dong Hyun Lee |
| |
Affiliation: | (1) Department of Chemical Engineering and Energy & Environment Research Center, Korea Advanced Institute of Science and Technology, 305-701 Daejeon, Korea |
| |
Abstract: | Effects of superficial gas velocities to a draft tube, to an annulus section and particle size on the solid circulation rate
(G,) have been determined in an internally circulating fluidized bed (0.28 m I.D. × 2m high) with an orifice type draft tube.
The solid circulation rate from the draft tube to an annulus section increases with increasing gas velocities to the draft
tube(U
d
) and annulus section (Ua) and consequent increase in pressure drop across the orifice (ΔPor). However, the values ofG
s
decrease by 7–21% with increasing particle size from 86 to 288 μm. The pressure drop across the orifice increases with increasingU
d
andU
a
. However, ΔPor decreases by 5–23% with increasing particle size. To predictG
s
in an internally circulating fluidized bed, a correlation is proposed as a function of ΔPor
This paper is dedicated to Professor Dong Sup Doh on the occasion of his retirement Korea University. |
| |
Keywords: | Internally Circulating Fluidized Bed Draft Tube Solid Circulation Rate Pressure Drop across the Orifice Correlation |
本文献已被 SpringerLink 等数据库收录! |