Firing a sub-bituminous coal in pulverized coal boilers configured for bituminous coals

Spitz, Nadine D.; Saveliev, Roman; Perelman, Miron; Korytni, Efim; Chudnovsky, B.; Talanker, A.; Bar‐Ziv, Ezra

doi:10.1016/j.fuel.2007.08.020

Cited by 26 publications

(9 citation statements)

References 15 publications

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“…This stimulated the development of computational fluid dynamics (CFD) boiler models as predictive tools to evaluate various boiler design and operation optimization options to improve thermal efficiency and reduce pollutant emissions of coal-fired boilers. Boiler CFD has been employed to study a wide range of boiler problems, such as low NO x combustion optimization (Adamczyk et al, 2014;Backreedy et al, 2005;Diez et al, 2008;Tan et al, 2017;Zhang et al, 2015), tube surface erosion (Gandhi et al, 2012), high-temperature corrosion (Yang et al, 2017), coal switching (Spitz et al, 2008), gas temperature deviation (Tan et al, 2018;Yin et al, 2002), slagging and fouling (Lee & Lockwood, 1999;Weber et al, 2013), and the development of advanced heat exchangers (Abadi et al, 2020;Ramezanizadeh et al, 2019). Nevertheless, CFD boiler models are still highly deficient in predicting boiler steam parameters subject to different boiler design and operation conditions.…”

Section: Introductionmentioning

confidence: 99%

Coupled heat transfer model for the combustion and steam characteristics of coal-fired boilers

Yan

Liu²,

Zhang³

et al. 2021

Engineering Applications of Computational Fluid Mechanics

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This paper presents a coupled heat transfer model for coal-fired boilers that integrates boiler's fire side computational fluid dynamics (CFD) solution with the boiler's steam cycle, and thus, can predict the boiler steam temperatures subject to different boiler design and operation conditions. In this coupled model, the heat transfer submodels describing the gas-steam heat exchange for each part of boiler heating surfaces are integrated by exchanging the steam temperatures iteratively. This coupled heat transfer model is self-consistent since it ensures the fire side heat transfer solution to always coincide with the steam temperature changes across each boiler heating surface. This model is specifically designed to provide efficient computational solutions to engineering boiler problems in which the changes of boiler steam temperatures subject to different boiler design and operation conditions are of the major concerns. This model is applied to a 320 MW subcritical boiler to evaluate the impacts of coal switching and boiler operation adjustment on boiler's heat transfer distributions and steam temperatures. The simulation results demonstrate that this model can effectively capture the complex coupled heat transfer behavior between the fire and steam sides of boiler and serve as an efficient predictive tool for engineering boiler problems.

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Section: Introductionmentioning

confidence: 99%

Coupled heat transfer model for the combustion and steam characteristics of coal-fired boilers

Yan

Liu²,

Zhang³

et al. 2021

Engineering Applications of Computational Fluid Mechanics

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“…According to United State and Canada, sub bituminous coal is rank between lignite and bituminous coal, firmly coal in dark brown colour. According to Spitz et al (2008), the sub-bituminous coal contains with high moisture and high volatile matter which is more reactive in combustion compare to the bituminous coal types. However, this sub-bituminous coal present lower sulphur contents as below as 2 percent by weight in coal.…”

Section: Introductionmentioning

confidence: 99%

SO2 In Flue Gas Desulphurization For Different Types Of Sub-Bituminous Coal

Samsudin¹

2020

European Proceedings of Social and Behavioural Sciences

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“…arsenic, cadmium, mercury, and selenium) and have been shown to be considerably enriched in coal relative to average crustal abundance on Earth. 1 Additional enrichment of the more volatile toxic elements occurs during the combustion process; subsequent condensation takes place on the surface of submicron fly ash particles which escape emission control devices and become biologically available. 2 Present emission control technology, which can exceed 98% removal of fly ash particulates, includes electrostatic precipitators and venturi wet scrubbers.…”

Section: Introductionmentioning

confidence: 99%

Bio-potential application of algae in reducing the toxicity of the fly ash from coal processing: a new trend of reclamation

Masri¹

2018

BIJ

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Fresh water algal growth inhibition test with unicellular alga Ankistrodesmus falcatus, Scenedesmus obliquus, Selenastrum capricornutum, and Microcoleus vaginatus is of great interest in biodiversity science. Our investigation has been made in laboratory continuous culture using sterile sewage as the medium for the start-up growth of these species. And since, these are at risk level when meet the coal industry waste, a suitable bioassay application based on an oxidizing medium of arsenic, cadmium, mercury, and selenium was implemented for algal incubation. First, the algistatic-algitidal levels were reported. Second, the observed growth inhibition with the value of IC 50 (the concentration which inhibits algae growth by 50%) was invested to obtain the growth responses and to define the range of the studied elemental variations. Noticeably, the median EC50 of the scrubber ash slurry extract (SASE) was 3-15%. Further, the results showed that the toxicity of the heavy metals depends on their chemical speciation and can be related to their free ion activities and their concentrations.

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Firing a sub-bituminous coal in pulverized coal boilers configured for bituminous coals

Cited by 26 publications

References 15 publications

Coupled heat transfer model for the combustion and steam characteristics of coal-fired boilers

Coupled heat transfer model for the combustion and steam characteristics of coal-fired boilers

SO2 In Flue Gas Desulphurization For Different Types Of Sub-Bituminous Coal

Bio-potential application of algae in reducing the toxicity of the fly ash from coal processing: a new trend of reclamation

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