Impact of tangential burner firing angle on combustion characteristics of large scale coal-fired boiler

Razali, Nur Mazlini; Boosroh, M.H.; Hasini, Hasril; Shuaib, N. H.

doi:10.1109/iceenviron.2009.5398649

Cited by 4 publications

(4 citation statements)

References 3 publications

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“…Coal used in this analysis was based on one of the type of coal used by the actual boiler [4]. Although coal consists of various species, in this study only the significant species is included in the analysis.…”

Section: Coal and Air Propertiesmentioning

confidence: 99%

“…However, one of its distinct shortcomings is temperature imbalance at the upper furnace which consequently may cause heat imbalance, local overheating and failure of reheater and superheater. Temperature imbalance at the upper furnace increases with the boiler loading capacity [7].It has been reported that the temperature imbalance is due to the intense and highly swirling flow caused by the combustion process [1][2][3][4][5][6][7]. The arrangement of fuel and air injections into the furnace has made the combustion gas to be highly swirling flow [2].…”

Section: Introductionmentioning

confidence: 99%

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CFD Analysis of Temperature Imbalance in Full Scale Tangentially Fired Coal Boiler

Fadhil¹,

Hasini²,

Jaafar

2014

AMM

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Tangentially fired boilers are widely used in generating electricity power due to its advantage of distributing heat evenly to all furnace walls. However, this type of boiler poses common temperature deviation at the upper furnace which may lead to temperature imbalance. This consequently may reduce the performance of the boiler which cannot be simply ignored. This paper investigates the flow and temperature imbalance in a 700 MW coal-fired boiler at full load and reduced load conditions. The effect of loading condition towards the temperature imbalance is investigated. It is observed that temperature imbalance occurs at the reheater plane between left wall and right wall where higher temperature was found near the left wall. Temperature imbalance is influenced by the loading condition, the higher the loading the higher the imbalance.

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Section: Coal and Air Propertiesmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

CFD Analysis of Temperature Imbalance in Full Scale Tangentially Fired Coal Boiler

Fadhil¹,

Hasini²,

Jaafar

2014

AMM

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“…The burner firing angle affects the tangential circle diameter and the locations of heat release significantly, and increasing firing angle results in large tangential circle diameter and low temperature at the core of the tangential circle [11]. High air velocity makes the temperature distribution uniform and reduce NOx emission significantly [12].…”

Section: Introductionmentioning

confidence: 99%

Combustion characteristics of a four-wall tangential firing pulverized coal furnace

Niu

Liu

Zhu

et al. 2015

Applied Thermal Engineering

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“…In answer to these concerns, governments are imposing greater restrictions on emissions thereby forcing the boiler industry to develop new designs and retrofit aging equipment in order to meet the new emission standards. In recent years, computational fluid dynamics (CFD) has become an indispensable tool in the design process of industrial combustion equipment such as utility boilers, see for instance .…”

Section: Introductionmentioning

confidence: 99%

Hybrid mesh adaptation applied to industrial numerical combustion

Sirois

McKenty²,

Gravel³

et al. 2011

Numerical Methods in Fluids

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SUMMARY This paper presents an anisotropic mesh adaptation method applied to industrial combustion problems. The method is based on a measure of the distance between two Riemannian metrics called metric non‐conformity. This measure, which can be used to build a cost function to adapt meshes comprising several types of mesh elements, provides the basis for a generic mesh adaptation approach applicable to various types of physical problems governed by partial differential equations. The approach is shown to be applicable to industrial combustion problems, through the specification of a target metric computed as the intersection of several Hessian matrices reconstructed from the main variables of the governing equations. Numerical results show that the approach is cost effective in that it can drastically improve the prediction of temperature and species distributions in the flame region of a combustor while reducing computational cost. The results can be used as a basis for pollutant prediction models. Copyright © 2011 John Wiley & Sons, Ltd.

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Impact of tangential burner firing angle on combustion characteristics of large scale coal-fired boiler

Cited by 4 publications

References 3 publications

CFD Analysis of Temperature Imbalance in Full Scale Tangentially Fired Coal Boiler

CFD Analysis of Temperature Imbalance in Full Scale Tangentially Fired Coal Boiler

Combustion characteristics of a four-wall tangential firing pulverized coal furnace

Hybrid mesh adaptation applied to industrial numerical combustion

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