MEASUREMENTS OF VOIDAGE NEAR THE WALL OF A CIRCULATING FLUIDIZED-BED RISER

被引：28

作者：

LOUGE, M

LISCHER, DJ

CHANG, HD

机构：

[1] Sibley School of Mechanical and Aerospace Engineering, Cornell University, Ithaca

来源：

POWDER TECHNOLOGY | 1990年 / 62卷 / 03期

基金：

美国国家科学基金会;

关键词：

D O I：

10.1016/0032-5910(90)80114-E

中图分类号：

TQ [化学工业];

学科分类号：

0817 ;

摘要：

Quantitative, time-dependent, non-intrusive capacitance measurements of voidage in the wall region of a circulating fluidized bed of cracking catalyst are reported. The data confirm the presence of a denser annulus of solids near the wall, which exhibits a vertical voidage profile similar to that observed for the average cross-sectional voidage. A statistical analysis shows that the average wall voidage in the dense lower region of the bed is nearly independent of the total solid flux, that it expands linearly with superficial gas velocity, and that its fluctuations are limited to low frequencies. © 1990.

引用

页码：269 / 276

页数：8

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