RADIAL PROFILES OF SOLIDS CONCENTRATION AND VELOCITY IN A VERY FINE-PARTICLE (36 MU-M) RISER

Citation
Y. Wang et al., RADIAL PROFILES OF SOLIDS CONCENTRATION AND VELOCITY IN A VERY FINE-PARTICLE (36 MU-M) RISER, Powder technology, 96(3), 1998, pp. 262-266
Citations number
11
Categorie Soggetti
Engineering, Chemical
Journal title
ISSN journal
00325910
Volume
96
Issue
3
Year of publication
1998
Pages
262 - 266
Database
ISI
SICI code
0032-5910(1998)96:3<262:RPOSCA>2.0.ZU;2-S
Abstract
Radial profiles of fine particle (36 mu m) concentration and velocity in a riser of 140 mm inner diameter are investigated using a dual-beam optical density sensor and a laser Doppler velocimeter. According to the cross-sectional average solids fraction three different kinds of r adial solids fraction profiles an present: uniform, dense ring and agg regation. At high superficial gas velocity and low solids concentratio n, the radial profiles of fine particle velocity obey a 1/7 power law. The radial profiles of solids fraction and velocity become flatter as the particle size decreases from 54 to 36 mu m. (C) 1998 Elsevier Sci ence S.A. All rights reserved.