Numerical Simulation of Ash Deposit of Typical Coal in Pulverized Coal-Fired Boiler

Abstract

Abstract: A numerical model coupled with comprehensive combustion code to predict ash deposition in a coal-fired boiler was developed. The results show serious slagging is mainly at 20-25 meter height of the front wall, because of the more rapid gas flow and higher temperature, and burning Shenmu coal will result in more slagging than Zibo coal. The predictions indicate slagging can be alleviated by proper operating conditions and using low slagging-tendency coals.

Key words: pulverized coal-fired boiler, numerical simulation, slagging, ash deposit, typical coal

CLC Number:

TK 224

WANG Zhen, HU Li-Yuan, LUO Yong-Hao, WANG Yuan. Numerical Simulation of Ash Deposit of Typical Coal in Pulverized Coal-Fired Boiler[J]. Journal of Shanghai Jiaotong University, 2013, 47(03): 364-369.

References

［1］Wang H，Harb J N. Modeling of ash deposition in largescale combustion facilities burning pulverized coal［J］.
Progress in Energy and Combustion Science, 1997, 23(3): 267282.
［2］Fan J, Zha X, Sun P, et al. Simulation of ash deposit in a pulverized coalfired boiler［J］. Fuel, 2001, 80(5): 645
654.
［3］Mueller C, Selenius M, Theis M, et al. Deposition behaviour of molten alkalirich fly ashes——Development of a
submodel for CFD applications［J］. Proceedings of the Combustion Institute, 2005, 30(2): 29912998.
［4］Strandstrm K, Mueller C, Hupa M. Development of an ash particle deposition model considering buildup and removal
mechanisms［J］. Fuel Processing Technology, 2007, 88(1112): 10531060.
［5］You C, Zhou Y. Effect of operation parameters on the slagging near swirl coal burner throat［J］. Energy & Fuels,
2006, 20(5): 18551861.
［6］Wang X, Zhao D, He L, et al. Modeling of a coalfired slagging combustor: Development of a slag submodel［J］.
Combustion and Flame, 2007, 149(3): 249260.
［7］Fang Q, Wang H, Wei Y, et al. Numerical simulations of the slagging characteristics in a downfired,
pulverizedcoal boiler furnace［J］. Fuel Processing Technology, 2010, 91(1): 8896.
［8］Baxter L L. Ash deposition during biomass and coal combustion: a mechanistic approach［J］. Biomass and Bioenergy,
1993, 4(2): 85102.
［9］Walsh P M, Sayre A N, Loehden D O, et al. Deposition of bituminous coal ash on an isolated heat exchanger tube:
Effects of coal properties on deposit growth［J］. Progress in Energy and Combustion Science, 1990, 16(4): 327345.
［10］Watt J D, Fereday F. The flow properties of slags formed from the ashes of British coals: Part 1, Viscosity of
homogeneous liquid slags in relation to slag composition［J］. J Inst Fuel, 1969, 42: 99103.
［11］Urbain G, Cambier F, Deletter M, et al. Viscosity of silicate melts［J］. Trans J Br Ceram Soc,1981, 80(9):
139141.
［12］Senior C，Srinivasachar S. Viscosity of ash particles in combustion systems for prediction of particle sticking［J］
. Energy & Fuels, 1995, 9(2): 277283.
［13］Degereji M U Ingham D B, Ma L, et al. Prediction of ash slagging propensity in a pulverized coal combustion furnace
［J］. Fuel, 2012, 101(11): 171178.

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