A numerical study of a utility boiler tangentially-fired furnace under different operating conditions

Belošević, Srdjan; Sijerčić, Miroslav; Tucaković, Dragan; Crnomarkovic, Nenad

doi:10.1016/j.fuel.2008.05.014

Cited by 53 publications

(61 citation statements)

References 14 publications

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“…In the present case, grid independence was verified by using grid distributions of 220158 nodes (grid 1), 170806 nodes (grid 2) and 126093 nodes (grid 3). The percentage error [10,18] was evaluated by looking at the difference between predicted gas velocities…”

Section: Model Validationmentioning

confidence: 99%

“…If the tangential circle firing diameter is too large, it may cause the flame to impinge on the waterwalls resulting in slagging. On the other hand, too small a tangential circle firing diameter may cause unstable ignition [10][11][12] . Adapting to the change of coal property, it horizontal adjustment can optimize the tangential circle firing diameter beneficial to achieve ignition and stable combustion based on the properties of the coal being fired.…”

Section: Introductionmentioning

confidence: 99%

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Numerical Research on Airflow-Controlled Swing Burners

Wang

Tang

2009

2009 International Conference on Energy and Environment Technology

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A new-type burner is presented which used transverse airflow to control the air-jet angle from the burner instead of traditionally used swing burner which used mechanical components to control the installation angle of the burner. Jamming problems of traditional swing burners can be avoided. The structure and working principle of the airflow-controlled swing burners are also introduced. Numerical simulation by means of a κ ε − turbulence model is carried out. The simulation model is validated by a semi-empirical formula of other air-jet. The effect of the jet position and the momentum ratio of the controlling airflow to the main airflow on the deflective angle of the main airflow is discussed. The simulation results show that the airflow-controlled swing burner can control the swing angle of the air jet as an alternative to the traditional mechanically operated swing burner. And the deflective angle can be controlled by different momentum ratios of the controlling airflow to the main flow of the burner.

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Section: Model Validationmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Numerical Research on Airflow-Controlled Swing Burners

Wang

Tang

2009

2009 International Conference on Energy and Environment Technology

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“…The numerical methods are used to simulate the flow field in coal preparation plants, mills, mixture channel, and burners [6][7][8]. The numerical methods are used to simulate the flow field in coal preparation plants, mills, mixture channel, and burners [6][7][8].…”

Section: Introductionmentioning

confidence: 99%

Numerical simulation of multiphase flow in ventilation mill and channel with louvers and centrifugal separator

Kozić¹,

Ristić²,

Puharić³

et al. 2011

THERM SCI

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This paper presents the results of numerical flow simulation in ventilation mill of Kostolac B power plant, where louvers and centrifugal separator with adjustable blade angle are used. Numerical simulations of multiphase flow were performed using the Euler-Euler and Euler-Lagrange approach of ANSYS FLUENT software package. The results of numerical simulations are compared with measurements in the mill for both types of separators. Due to very complex geometry and large number of the grid cells, convergent solution with the Eulerian model could not be obtained. For this reason the mixture model was employed resulting in very good agreement with measurements, concerning the gas mixture distribution and velocity at the main and secondary burners. There was large difference between the numerical results and measurements for the pulverized coal distribution at the burners. Taking into consideration that we analyzed dilute mixture with very low volume fraction of the coal, the only choice was the Euler-Lagrange approach, i.e. discrete phase model limited to volume fraction of the discrete phase less than 10-12%. Obtained distributions of the coal at the burners agree well for both types of separators

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“…(4,7,9) 1,0622 1,0908 (18,7,9) 1,0759 1,0908 (22,7,9) 1,0759 1,0908 (26,7,9) 1,0759 1,0908 1,0908 U tabeli 6.3c, zapreminska zona (4,7,9) je jedina zona koja pripada zapremini levka, a sve ostale zone pripadaju zapremini ložišta iznad levka. Tehnikom korekcije može se poboljšati zadovoljenje principa konzervativnosti svih zapreminskih zona ložišta.…”

Section: Zonaunclassified

“…) (4,7,9) 0,5825 0,5824 (18,7,9) 0,5824 0,5824 (22,7,9) 0,5824 0,5824 (26,7,9) 0,5824 0,5824 0,5824872…”

Section: Zonamentioning

confidence: 99%

Contribution to the modeling of the spatial distribution of radiation inside the furnace of the pulverized coal fired boiler

Crnomarković¹

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A numerical study of a utility boiler tangentially-fired furnace under different operating conditions

Cited by 53 publications

References 14 publications

Numerical Research on Airflow-Controlled Swing Burners

Numerical Research on Airflow-Controlled Swing Burners

Numerical simulation of multiphase flow in ventilation mill and channel with louvers and centrifugal separator

Contribution to the modeling of the spatial distribution of radiation inside the furnace of the pulverized coal fired boiler

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