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《Journal of Power Engineering》 2006-01
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Numerical Simulation of Combustion Processes in an Ultra Supercritical Boiler

SHEN Chun-mei,SUN Rui,WU Shao-hua(School of Energy Science and Engineering,Harbine University of Technology,Harbine 150001,China)  
With the CFD(computational fluid dynamics) software PHOENICS and a reasonable mathematical model,numerical simulations of combustion processes in a double-tangential firing single furnace boiler of a 1000 MW ultra supercritical unit has been performed.Particularly studied were the characteristics of double-tangential firing,of coke firing and those of NOx emission.Test results show that the arrangement of burners,on the front and rear wall,cause gas flow in the furnace to assume an elliptical shape,with little NO_x emission in toto and high burn out efficiency in case of coke.However,the high temperature gas zone as well as a lot of unburned coke veer towards the front wall at a furnace height above 40 m,with the remaining coke gradually burning out in the radiation platen zone.A solution of the problem is proposed,trial application of which remarkably raised the coke's combustion speed and made the coke basically burn out before reaching the platen zone,with somewhat reduced NO_x emission.Figs 8,tables 3 and refs 11.
【Fund】: 国家高技术研究发展计划(863计划)资助项目(2002AA5260123)
【CateGory Index】: TK229.2
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