Distribution of the coal flow in the mill-duct system of the As Pontes Power Plant using CFD modeling

Ferrín, J.L.; Saavedra, Laura

doi:10.1016/j.fuproc.2012.07.005

Cited by 11 publications

(5 citation statements)

References 16 publications

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“…A DPM is valid because the solid-volume ratio is less than 10% [3]. In the numerical control volume, velocities of particles (v p ) are obtained by the equation [14]:…”

Section: Numerical Analysismentioning

confidence: 99%

Numerical and experimental analysis of pulverized coal mill classifier performance in the Soma B Power Plant

Ataş

Tekir²,

Paksoy

et al. 2014

Fuel Processing Technology

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“…A DPM is valid because the solid-volume ratio is less than 10% [3]. In the numerical control volume, velocities of particles (v p ) are obtained by the equation [14]:…”

Section: Numerical Analysismentioning

confidence: 99%

Numerical and experimental analysis of pulverized coal mill classifier performance in the Soma B Power Plant

Ataş

Tekir²,

Paksoy

et al. 2014

Fuel Processing Technology

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“…Turbulence intensity and hydraulic diameter were used to define turbulent boundary conditions. Turbulence intensity is defined as shown in eqs and . For the definition of hydraulic diameter, the hydraulic diameter of pipeline is equal to the pipe diameter and the hydraulic diameter of leakage hole is equal to the leakage diameter …”

Section: Methodsmentioning

confidence: 99%

Analysis and Prediction of Methane Invasion Distance Considering Real Ground Boundary

Liu

Chen

et al. 2021

ACS Omega

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Natural gas has become a global energy consumption hotspot because of its large reserves and clean combustion. Due to soil corrosion, construction damage, and natural disasters, leakage accidents of buried natural gas pipelines often occur. In this paper, the steady simulation method was used to study the methane invasion limit state (MILS) and the methane invasion limit distance (MILD) under the conditions of hardened surface ground (HSG), unhardened surface ground (UHSG), and semihardened surface ground (SHSG), and the transient simulation of methane invasion distance (MID) under the condition of HSG with the largest MILD was carried out. The results showed that regardless of ground conditions, with the increase of leakage time, the diffusion range of methane in soil will not increase all the time, and there was a limit state (MILS). The distribution range and concentration of methane in the soil under HSG condition were the largest, followed by the SHSG condition, and the UHSG condition was the smallest. When the ground condition changed from UHSG to HSG, the MILD increased from 3.41 to 9.32 m. The HSG condition will increase the MILD and the range of dangerous areas. The buried depth of the pipeline had a serious impact on the MILD. When the buried depth of the pipeline increased from 0.3 to 1.5 m, the MILD increased from 1.75 to 3.49 m under the condition of UHSG and exceeded 10 m under the condition of HSG. The average error of the MID prediction model was 2.37% under the condition of HSG, which can accurately predict the leakage of buried pipeline. The MID provides a reference for the layout of urban underground gas leakage monitoring points. The MILD can provide guidance for the safe distance between natural gas pipeline and structures in the design code of natural gas pipeline.

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“…Studies on the separation process have been numerous in recent years. The paper [10] presents the research on the flow profile in the dust channel of the mill system of a pulverized coal power plant. Experimental and computational studies on the efficiency of the cross-separator are presented in Ref.…”

Section: Fig 16 the Shutter Of Divider With Characteristic Dimensionsmentioning

confidence: 99%

Field and CFD Study of Fuel Distribution in Pulverized Fuel (PF) Boilers

Ciukaj

Hernik

2020

J. Therm. Sci.

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The article presents both field and CFD results of a new concept of a mechanical pulverized fuel (PF) distributor. The goal of the study was to improve the pulverized coal-air mixture separation in PF boilers where the fuel preparation and feeding system was operated in a combined coal and biomass grinding conditions. The numerical analysis was preceded after a field study, where measurements were carried out in a pulverized coal-fired (PC) boiler equipped with a technology of NO x reduction by means of primary methods. Proper distribution of a pulverized coal-air mixture to the individual burners is one of the fundamental tasks of the combustion systems where the primary methods are implemented to control the NO x emission. Problems maintaining the proper distribution of fuel to the burners related primarily to the boilers where the coal and biomass co-grinding is used. Changing the load of coal-mills and fuel type at the same time (i.e., different types of biomass) could result in less effective separation of pulverized fuel particles in PF distributors. Selection of an appropriate construction of a distributor will allow the better control of the combustion process which results in decreased NO x emission while keeping the proper combustion efficiency, i.e., less unburned carbon (UBC) in the fly ash. The results of the field measurements made it possible to create a CFD distribution base model, which was used for the analysis of a new splitter construction to be used in a PF distributor. Subsequent analysis of the numerical splitter enables precise analysis of its construction, including the efficiency of separation and the prediction of conveying of the coal and biomass particles.

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Distribution of the coal flow in the mill-duct system of the As Pontes Power Plant using CFD modeling

Abstract: The efficiency of a Power Plant is affected by the distribution of the pulverized coal within the furnace.

Cited by 11 publications

References 16 publications

Numerical and experimental analysis of pulverized coal mill classifier performance in the Soma B Power Plant

Numerical and experimental analysis of pulverized coal mill classifier performance in the Soma B Power Plant

Analysis and Prediction of Methane Invasion Distance Considering Real Ground Boundary

Field and CFD Study of Fuel Distribution in Pulverized Fuel (PF) Boilers

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