Prediction of ignition behavior in a tangentially fired pulverized coal boiler using CFD

Asotani, Toshimitsu; Yamashita, Toru; Tominaga, Hiroaki; Uesugi, Y.; Itaya, Yoshinori; Mori, Shigekatu

doi:10.1016/j.fuel.2007.04.018

Cited by 100 publications

(54 citation statements)

References 17 publications

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“…Many researchers have modeled pulverized coal combustion using commercial software, in particular, FLUENT (3)(4)(5)(6)(7)(8). Vuthaluru et al simulated a wall-fired boiler using a commercial CFD flow solver, and the results showed good agreement with measured and reported data (7).…”

Section: Introductionmentioning

confidence: 96%

The Effect of Temperature Distribution on Tube Rupture

Aydin

Durak

2012

JTST

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This paper reports the effect of temperature distribution on tube rupture at the pulverized coal fired thermal power plant. A computational model was applied to a 150 MWe boiler burning high-ash, medium-volatile coal. The radial and axial flame temperature distribution in the boiler was simulated using CFD code FLUENT. Flame temperatures were measured at points close to wall in some boiler levels and compared with computational fluid dynamics (CFD) solutions. CFD analysis showed that the flame shaped in the centre of the boiler and the temperature decreased gradually towards the boiler walls. The coal and ash composition was analyzed, and tube thickness was measured. Analysis showed that the ash and chlorine content of the coal, and SiO 2 content of the ash were very high. Deposits on tubes can occur overheating, fouling and slagging which lead to tube ruptures. The abrasive effect of the ash accelerated thinning of the tubes and caused them to rupture.

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Section: Introductionmentioning

confidence: 96%

The Effect of Temperature Distribution on Tube Rupture

Aydin

Durak

2012

JTST

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“…Commercial codes such as Fluent or Code Saturne have been extensively applied to provide information on the complex phenomena including gas-solid flow, combustion and heat transfer (Belosevic et al, 2006;Asotani et al, 2008;Yin et al, 2003;Fan et al, 2001;Belosevis et al, 2008). These tools are then used to build boiler models customised with plant operational diagnostic data and experience.…”

Section: Introductionmentioning

confidence: 99%

Computational Modelling of a Tangentially Fired Boiler With Deposit Formation Phenomena

Modliński¹

2014

Chemical and Process Engineering

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Any complete CFD model of pulverised coal-fired boiler needs to consider ash deposition phenomena. Wall boundary conditions (temperature and emissivity) should be temporally corrected to account for the effects of deposit growth on the combustion conditions. At present voluminous publications concerning ash related problems are available. The current paper presents development of an engineering tool integrating deposit formation models with the CFD code. It was then applied to two tangentially-fired boilers. The developed numerical tool was validated by comparing it with boiler evaporator power variation based on the on-line diagnostic system with the results from the full CFD simulation.

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“…CFD modelling of power boiler furnace chambers is often performed in the engineering practice (Asotani et al, 2008;Dal-Secco et al, 2007;Hernik, 2012). Quite often, however, balance calculations are not carried out for the entire boiler.…”

Section: Introductionmentioning

confidence: 99%

Numerical Calculations of WR-40 Boiler Based on its Zero-Dimensional Model

Hernik¹

2014

Chemical and Process Engineering

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Generally, the temperature of flue gases at the furnace outlet is not measured. Therefore, a special computation procedure is needed to determine it. This paper presents a method for coordination of the numerical model of a pulverised fuel boiler furnace chamber with the measuring data in a situation when CFD calculations are made in regard to the furnace only. This paper recommends the use of the classical 0-dimensional balance model of a boiler, based on the use of measuring data. by means of a selection of the furnace wall emissivity. As a result of CFD modelling, the flue gas temperature and the concentration of CO, CO 2 , O 2 and NO x were obtained at the furnace chamber outlet. The results of numerical modelling of boiler combustion based on volumetric reactions and using the Finite-Rate/Eddy-Dissipation Model are presented.

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Prediction of ignition behavior in a tangentially fired pulverized coal boiler using CFD

Cited by 100 publications

References 17 publications

The Effect of Temperature Distribution on Tube Rupture

The Effect of Temperature Distribution on Tube Rupture

Computational Modelling of a Tangentially Fired Boiler With Deposit Formation Phenomena

Numerical Calculations of WR-40 Boiler Based on its Zero-Dimensional Model

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