Fluid and Solids Flow Affecting the Solids Circulation Rate in Spouted Beds with a Draft-Tube

JOURNAL OF CHEMICAL ENGINEERING OF JAPAN

Kazutaka Yamada¹  Shinya Ito¹  Shinichi Yanai¹  Hirotsugu Hattori¹  Tomomi Onezawa¹ 

[1] Department of Fine Materials Engineering, Faculty of Textile Science and Technology, Shinshu University

关键词: Spouted Bed;    Draft-Tube;    Spout Gas Flow;    Annulus Gas Flow;    Solids Circulation Rate;   

DOI  :  10.1252/jcej.37.1085

来源: Maruzen Company Ltd

【 摘 要 】

References(5)Cited-By(11)In a spouted bed, the gas flow rates cannot be changed independently in either the spout or the annulus. In this study, an experimental spouted bed equipped with a draft-tube was made in such a way that each of the gas flow rates can be changed independently. The effect of the gas flow rate in the spout or in the annulus on the circulation rate of solids was examined for the three types of spouted bed. The relation between the solids circulation rate and the average gas velocity in the annulus differs among these three types of spouted beds. In the spouted bed with a gas inlet nozzle, the solids circulation rate initially sharply decreased with the average gas velocity in the annulus. It was found that an eddy motion of solid particles caused this sharp decrease in the solids circulation rate. The fluid flow that caused this eddy motion in the solids was confirmed by using a two-dimensional water flow model.

【 授权许可】

Unknown