Title :
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
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;
Conference_Titel :
Power and Energy Engineering Conference (APPEEC), 2011 Asia-Pacific
Conference_Location :
Wuhan
Print_ISBN :
978-1-4244-6253-7
DOI :
10.1109/APPEEC.2011.5747742
