Numerical simulation of flow, combustion, and NO x emission characteristics in a 300 MW down-fired boiler with different OFA ratios

Feng Ren; Zhengqi Li; Lingyan Zeng; Zhichao Chen; Qunyi Zhu

doi:10.1080/10407782.2012.691062

Numerical simulation of flow, combustion, and NO _x emission characteristics in a 300 MW down-fired boiler with different OFA ratios

Feng Ren
, Zhengqi Li^*
, Lingyan Zeng
, Zhichao Chen
, Qunyi Zhu

^*Corresponding author for this work

School of Energy Science and Engineering, Harbin Institute of Technology

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

20 Scopus citations

Abstract

A computational fluid dynamics model of a 300 MW down-fired furnace equipped with over-fire air (OFA) has been developed using Fluent 6.3. The validated CFD model is applied to investigate the effects of several operating conditions at full load with different OFA ratios. Simulation results indicate that as the OFA ratio rises from 0% to 40%, the NO x emission falls and the combustible material content in the fly ash increases. On the whole, n, the optimal OFA ratio for the studied down-fired boiler is 20%. This study provides a basis to assess in depth future operations of down-fired boilers.

Original language	English
Pages (from-to)	231-249
Number of pages	19
Journal	Numerical Heat Transfer; Part A: Applications
Volume	62
Issue number	3
DOIs	https://doi.org/10.1080/10407782.2012.691062
State	Published - 1 Aug 2012
Externally published	Yes

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title = "Numerical simulation of flow, combustion, and NO x emission characteristics in a 300 MW down-fired boiler with different OFA ratios",

abstract = "A computational fluid dynamics model of a 300 MW down-fired furnace equipped with over-fire air (OFA) has been developed using Fluent 6.3. The validated CFD model is applied to investigate the effects of several operating conditions at full load with different OFA ratios. Simulation results indicate that as the OFA ratio rises from 0\% to 40\%, the NO x emission falls and the combustible material content in the fly ash increases. On the whole, n, the optimal OFA ratio for the studied down-fired boiler is 20\%. This study provides a basis to assess in depth future operations of down-fired boilers.",

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T1 - Numerical simulation of flow, combustion, and NO x emission characteristics in a 300 MW down-fired boiler with different OFA ratios

AU - Ren, Feng

AU - Li, Zhengqi

AU - Zeng, Lingyan

AU - Chen, Zhichao

AU - Zhu, Qunyi

PY - 2012/8/1

Y1 - 2012/8/1

N2 - A computational fluid dynamics model of a 300 MW down-fired furnace equipped with over-fire air (OFA) has been developed using Fluent 6.3. The validated CFD model is applied to investigate the effects of several operating conditions at full load with different OFA ratios. Simulation results indicate that as the OFA ratio rises from 0% to 40%, the NO x emission falls and the combustible material content in the fly ash increases. On the whole, n, the optimal OFA ratio for the studied down-fired boiler is 20%. This study provides a basis to assess in depth future operations of down-fired boilers.

AB - A computational fluid dynamics model of a 300 MW down-fired furnace equipped with over-fire air (OFA) has been developed using Fluent 6.3. The validated CFD model is applied to investigate the effects of several operating conditions at full load with different OFA ratios. Simulation results indicate that as the OFA ratio rises from 0% to 40%, the NO x emission falls and the combustible material content in the fly ash increases. On the whole, n, the optimal OFA ratio for the studied down-fired boiler is 20%. This study provides a basis to assess in depth future operations of down-fired boilers.

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JO - Numerical Heat Transfer; Part A: Applications

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IS - 3

ER -

Numerical simulation of flow, combustion, and NO _x emission characteristics in a 300 MW down-fired boiler with different OFA ratios

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