Particle sticking behavior near the throat of a low-NOx axial-swirl coal burner

Zhengqi Li, Lingyan Zeng, Guangbo Zhao, Shanping Shen and Fucheng Zhang

Applied Energy, 2011, vol. 88, issue 3, 650-658

Abstract: The results of numerical simulations of particle sticking behavior near the throat of a low-NOx axial-swirl burner in a 600-MWe bituminous coal burned boiler are presented. A comparison of simulation results with measurements using a probe with hot-film sensors shows that the numerical model offers a reasonable description. Calculated results of slagging show that slag build-up is substantial near the throat of the designed burner and that the sticking-particle ratio is as much as 33.2%. Because central and primary air streams remain unchanged, the mass flux of the inner secondary air is 3.25 kg s-1 while that of the outer secondary air is 12.16 kg s-1; however, the sticking-particle ratio can still be lowered to as little as 9.6%. By adjusting the outer secondary air blade angle to 15°, the sticking-particle ratio can be further lowered to 8.73%.

Keywords: Swirl; burner; Numerical; simulation; Particle; sticking; behavior (search for similar items in EconPapers)
Date: 2011
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (11)

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