Experimental Study on the Penetration Model of Secondary Air Injection in CFB

Author

Wang, Zhengyang ; Tan, Yufei ; Zhao, Ningbo ; Sun, Shaozeng ; Wu, Shaohua

Author_Institution

Post-doctor Station of Civil Eng., Harbin Inst. of Technol., Harbin, China

fYear

2011

fDate

25-28 March 2011

Firstpage

1

Lastpage

4

Abstract

This work presents some experimental research on the penetration of secondary air injection in a cold circulating fluidized bed (CFB) which has a square cross-section of 0.25m × 0.25m and a height of 6.07m. Using CO₂ as secondary air injection tracer, a simple model was developed to predict the penetration depth of secondary air in the CFB. Based on the fundamental momentum ratios of cross flows, this model mainly takes into account the primary air velocity, secondary air nozzle diameter, solids circulation rate. Finally, experimental results and model predictions show good agreements.

Keywords

confined flow; fluidised beds; jets; nozzles; two-phase flow; CFB; air nozzle; cold circulating fluidized bed; core-annulus gas-solid flow field; jets; penetration depth; penetration model; secondary air injection; solids circulation rate; square cross-section; Atmospheric measurements; Atmospheric modeling; Combustion; Optical variables measurement; Predictive models; Probes; Solids;

fLanguage

English

Publisher

ieee

Conference_Titel

Power and Energy Engineering Conference (APPEEC), 2011 Asia-Pacific

Conference_Location

Wuhan

ISSN

2157-4839

Print_ISBN

978-1-4244-6253-7

Type

conf

DOI

10.1109/APPEEC.2011.5747742

Filename

5747742