Numerical study on the effect of the Over-Fire-Air to the air flow and coal combustion in a 670 t/h wall-fired boiler

Likun Huang; Zhengqi Li; Rui Sun; Jue Zhou

doi:10.1016/j.fuproc.2005.10.008

Numerical study on the effect of the Over-Fire-Air to the air flow and coal combustion in a 670 t/h wall-fired boiler

Likun Huang
, Zhengqi Li^*
, Rui Sun
, Jue Zhou

^*Corresponding author for this work

School of Energy Science and Engineering, Harbin Institute of Technology

Research output: Contribution to journal › Article › peer-review

50 Scopus citations

Abstract

The comparison between the numerical results of the cold air flow and the experimental data of a 670 t/h coal-fired boiler shows a good coincidence. The NO value of calculation is 12% less than the ones of measurement but the CO value is almost same between calculation and measurement. Mathematical models and calculation method are proved to be valid. The aerodynamic field in the furnace with various Over-Fire-Air (OFA) parameters and arrangements is calculated to analyze the effect of OFA after the OFA ports are added to the boiler furnace. The optimized OFA parameters and arrangements are gained and simulated in reacting flow. The result shows that the NO emission of the furnace with OFA is reduced and the NO concentration of outlet decreases from 638 mg/N m³ to 570 mg/N m³ (O₂ = 6%).

Original language	English
Pages (from-to)	363-371
Number of pages	9
Journal	Fuel Processing Technology
Volume	87
Issue number	4
DOIs	https://doi.org/10.1016/j.fuproc.2005.10.008
State	Published - Apr 2006
Externally published	Yes

Keywords

Aerodynamic field
Coal combustion
Computational fluid dynamics
NO emission
Over-Fire-Air

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10.1016/j.fuproc.2005.10.008

Cite this

@article{e9c7e3c3612e49f3b32b03a9ebc69d6d,

title = "Numerical study on the effect of the Over-Fire-Air to the air flow and coal combustion in a 670 t/h wall-fired boiler",

abstract = "The comparison between the numerical results of the cold air flow and the experimental data of a 670 t/h coal-fired boiler shows a good coincidence. The NO value of calculation is 12\% less than the ones of measurement but the CO value is almost same between calculation and measurement. Mathematical models and calculation method are proved to be valid. The aerodynamic field in the furnace with various Over-Fire-Air (OFA) parameters and arrangements is calculated to analyze the effect of OFA after the OFA ports are added to the boiler furnace. The optimized OFA parameters and arrangements are gained and simulated in reacting flow. The result shows that the NO emission of the furnace with OFA is reduced and the NO concentration of outlet decreases from 638 mg/N m3 to 570 mg/N m3 (O2 = 6\%).",

keywords = "Aerodynamic field, Coal combustion, Computational fluid dynamics, NO emission, Over-Fire-Air",

author = "Likun Huang and Zhengqi Li and Rui Sun and Jue Zhou",

year = "2006",

month = apr,

doi = "10.1016/j.fuproc.2005.10.008",

language = "英语",

volume = "87",

pages = "363--371",

journal = "Fuel Processing Technology",

issn = "0378-3820",

publisher = "Elsevier B.V.",

number = "4",

}

TY - JOUR

T1 - Numerical study on the effect of the Over-Fire-Air to the air flow and coal combustion in a 670 t/h wall-fired boiler

AU - Huang, Likun

AU - Li, Zhengqi

AU - Sun, Rui

AU - Zhou, Jue

PY - 2006/4

Y1 - 2006/4

N2 - The comparison between the numerical results of the cold air flow and the experimental data of a 670 t/h coal-fired boiler shows a good coincidence. The NO value of calculation is 12% less than the ones of measurement but the CO value is almost same between calculation and measurement. Mathematical models and calculation method are proved to be valid. The aerodynamic field in the furnace with various Over-Fire-Air (OFA) parameters and arrangements is calculated to analyze the effect of OFA after the OFA ports are added to the boiler furnace. The optimized OFA parameters and arrangements are gained and simulated in reacting flow. The result shows that the NO emission of the furnace with OFA is reduced and the NO concentration of outlet decreases from 638 mg/N m3 to 570 mg/N m3 (O2 = 6%).

AB - The comparison between the numerical results of the cold air flow and the experimental data of a 670 t/h coal-fired boiler shows a good coincidence. The NO value of calculation is 12% less than the ones of measurement but the CO value is almost same between calculation and measurement. Mathematical models and calculation method are proved to be valid. The aerodynamic field in the furnace with various Over-Fire-Air (OFA) parameters and arrangements is calculated to analyze the effect of OFA after the OFA ports are added to the boiler furnace. The optimized OFA parameters and arrangements are gained and simulated in reacting flow. The result shows that the NO emission of the furnace with OFA is reduced and the NO concentration of outlet decreases from 638 mg/N m3 to 570 mg/N m3 (O2 = 6%).

KW - Aerodynamic field

KW - Coal combustion

KW - Computational fluid dynamics

KW - NO emission

KW - Over-Fire-Air

UR - https://www.scopus.com/pages/publications/31944437169

U2 - 10.1016/j.fuproc.2005.10.008

DO - 10.1016/j.fuproc.2005.10.008

M3 - 文章

AN - SCOPUS:31944437169

SN - 0378-3820

VL - 87

SP - 363

EP - 371

JO - Fuel Processing Technology

JF - Fuel Processing Technology

IS - 4

ER -

Numerical study on the effect of the Over-Fire-Air to the air flow and coal combustion in a 670 t/h wall-fired boiler

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Keywords

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