Numerical study of a 350MWe tangentially fired pulverized coal furnace of the As Pontes Power Plant

Constenla, I. Rodríguez; Ferrín, J.L.; Saavedra, Laura

doi:10.1016/j.fuproc.2013.05.016

Cited by 39 publications

(24 citation statements)

References 22 publications

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“…Numerical simulation is a powerful tool for understanding such phenomena in each furnace with a different design. Recently, numerical simulations of pulverized coal combustion field in large-scale furnaces have been conducted by various research groups [1][2][3][4][5][6][7][8][9]. For numerical simulations of pulverized coal combustion, simplified models are generally employed because of the limitation of computational resources.…”

Section: Introductionmentioning

confidence: 99%

Numerical analysis on effect of furnace scale on heat transfer mechanism of coal particles in pulverized coal combustion field

Hashimoto

Watanabe

2016

Fuel Processing Technology

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To investigate the effect of the furnace scale on the heat transfer mechanism of coal particles, numerical simulations of coal combustion fields in three different scale furnaces (915 MW th actual large scale boiler, 2.4 MW th and 0.76 MW th test furnaces) were conducted. High accuracy of simulation methods was validated with the measured data. From the comparison of numerical simulations between three different scale furnaces, it was clarified that the particle residence time with high particle temperature for a small scale furnace is shorter than that for a large scale furnace even if the particle residence time passing the high temperature gas is the same. This is caused by the insufficient heat gain of particles for a small scale furnace due to the lower radiation heat transfer because of the thinner flame thickness in the small furnace. The sphericity of ash particles from small scale furnaces is lower than that for large scale furnaces due to the shorter particle residence time with high particle temperature. These findings should be considered when the usability of coal brands for actual large scale boilers is evaluated by the fly ash properties from a small scale experimental furnace.

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Section: Introductionmentioning

confidence: 99%

Numerical analysis on effect of furnace scale on heat transfer mechanism of coal particles in pulverized coal combustion field

Hashimoto

Watanabe

2016

Fuel Processing Technology

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“…Research efforts continuously focus on modeling NO x formation/destruction reactions in pulverized coal combustion [4][5][6][7][8]. Nitric oxide (NO) is the most abundant NO x from coal combustion.…”

Section: Introductionmentioning

confidence: 99%

The Study and the Mechanism of Nitrogen Oxides’ Formation in Combustion of Fossil Fuels

Ongar¹,

Iliev²,

Nikolić³

et al. 2018

FU Mech Eng

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The burning of all fossil fuels is accompanied by the production of large quantities of nitrogen oxides. Nitrogen oxide from coal combustion is formed from the molecular nitrogen in the air and the nitrogen contained in the fuel. In accordance with the mechanism of formation of nitric oxide from fuel, it is desirable to increase the concentration of coal dust in the flame. The thermal regime of combustion accelerates the release of volatiles, with flames spreading out and the coke residue contributes to the chemical reduction of NOx. In this work we consider the specific issues of the formation mechanism of NOx fuel and ways to reduce their atmospheric emissions. Presented are results from the calculation of the influence of the following on the level of nitric oxides during coal combustion: temperature, oxygen concentration and time of release of fuel nitrogen. It has been established that the influence of nitric oxide fuel on the total nitric oxide emissions is more noticeable at low temperatures of the combustion process.

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“…In today's world, attention has been increasingly paid to the efficiency of thermal power plants because of energy saving and global environmental protection. Fossil‐fueled power plants are the major emitters of carbon dioxide, CO 2 , a greenhouse gas, which is a contributor to global warming . The emission of CO 2 varies on a rank and type of coal used.…”

Section: Introductionmentioning

confidence: 99%

Numerical and experimental study of temperature distribution on thermal plant coal mill walls

Kozić

Ristić²,

Katavić³

et al. 2017

Env Prog and Sustain Energy

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This article presents results of a numerical and experimental study of the temperature distribution inside and on the walls of the ventilation mill in the Kostolac B power plant, Serbia. This is very important because heat exchange between gas mixtures, ventilation mill walls and the environment, influences coal powder temperature, the combustion process, and the emission of greenhouse gases. The most complex multi-phase model in the Euler-Euler approach has been used through the ANSYS FLUENT code, for the numerical simulation of temperature distribution. Two ventilation mill models have been considered, one with zero wall thickness and the other one with steel walls, with and without insulation. An infrared thermographic camera was used for monitoring the temperature distribution on the outside wall of the ventilation mill housing, before insulator reparation, while after the reparation measurements were carried out at the selected points with infrared thermometer. The experimental results were used for verifying the results of the numerical simulation method as well as for detecting the damaged insulation.

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Numerical study of a 350MWe tangentially fired pulverized coal furnace of the As Pontes Power Plant

Cited by 39 publications

References 22 publications

Numerical analysis on effect of furnace scale on heat transfer mechanism of coal particles in pulverized coal combustion field

Numerical analysis on effect of furnace scale on heat transfer mechanism of coal particles in pulverized coal combustion field

The Study and the Mechanism of Nitrogen Oxides’ Formation in Combustion of Fossil Fuels

Numerical and experimental study of temperature distribution on thermal plant coal mill walls

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