DocumentCode :
2120138
Title :
Numerical Simulation of Furnace Slag Waste Heat Recovery in Fluidized Bed
Author :
Yang, Baojin ; Guo, Jianxiang ; Liu, Fang ; Du, Yuanyuan
Author_Institution :
R&D Center of Energy & Environ. Equip., Qing Dao Technol. Univ., Qingdao, China
fYear :
2010
fDate :
28-31 March 2010
Firstpage :
1
Lastpage :
5
Abstract :
Furnace slag is discharged at the temperature of about 1500 K, it is obviously significative to recover the waste heat for energy saving. In this paper, a new-style fluidized bed is adopted to recover the waste heat after the liquid furnace slag has been granulated into particles for power generation. Considering the complexity of the flow field and the temperature field at so high temperature, the Computational Fluid Dynamics study (CFD) was carried out to simulate the flow field and the temperature field in the fluidized bed, which guides us to improve the structure of the fluidized bed to get a stable processing capacity and high efficiency of heat transfer. Based on the Eulerian-Eulerian molde, kinetic theory was adopted in the model. The impact of particle collision and friction upon the flow field was considered comprehensively in the model. The simulation was carried out with three different slag particles in size to analyse the impact of particle size on the flow. Comparison of the result shows that the fluidized bed with smaller particles tends to fluidization state earlier and gains higher height under the same air velocity and has better heat transfer coefficient to gain more high-grade energy. The result also indicates the size of particle hardly affects the heat transfer speed, but affects the heat transfer efficiency distinctly.
Keywords :
fluidised beds; furnaces; heat recovery; numerical analysis; slag; waste heat; waste recovery; Eulerian-Eulerian molde; computational fluid dynamics; energy saving; flow field; fluidized bed; furnace slag waste heat recovery; heat transfer coefficient; heat transfer speed; high grade energy; kinetic theory; liquid furnace slag; numerical simulation; particle collision; slag particles; Computational fluid dynamics; Fluidization; Furnaces; Heat recovery; Heat transfer; Numerical simulation; Power generation; Slag; Temperature; Waste heat;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
Power and Energy Engineering Conference (APPEEC), 2010 Asia-Pacific
Conference_Location :
Chengdu
Print_ISBN :
978-1-4244-4812-8
Electronic_ISBN :
978-1-4244-4813-5
Type :
conf
DOI :
10.1109/APPEEC.2010.5449505
Filename :
5449505
Link To Document :
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