A model of coal combustion dynamics in a fluidized bed combustor

Junk, K.W.; Brown, Robert C.

doi:10.1016/0010-2180(93)90063-9

Cited by 12 publications

(3 citation statements)

References 25 publications

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“…43 Most of the models are steady state, but dynamic evolution of the PSD has also been modeled. 14,23,34,44,45 Coupling of PSDs and reactions described by shrinking core model have been discussed. 46,47 The cyclone characteristics affect the PSD of the elutriated particles, which are returned to the reactor.…”

Section: Introductionmentioning

confidence: 99%

Modeling of particle size distribution of limestone in sulfur capture in air and oxy-fuel circulating fluidized bed combustion

Saastamoinen¹,

Tourunen²,

Leino³

et al. 2016

EECT

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Measurements for partition of Ca-containing compounds in particles in air and oxy-fuel combustion are presented. A model for steady and unsteady state particle size distribution (PSD) of limestone including the effects of PSD of the feed, attrition, fly ash, and bottom ash removal is presented. By incorporating models for sulfation, a new model for distribution of Ca-containing compounds CaCO 3 , CaO, and CaSO 4 in different particle sizes during sulfation is found. The model can be applied to study the effects of different factors on the PSD of limestone in the bed, to optimize the PSD in the bed, and to study reasons for the measured PSDs and distributions of Ca-containing compounds in different size fractions in the bed in sulfur capture in circulating fluidized bed combustion in air and oxy-fuel conditions.

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Section: Introductionmentioning

confidence: 99%

Modeling of particle size distribution of limestone in sulfur capture in air and oxy-fuel circulating fluidized bed combustion

Saastamoinen¹,

Tourunen²,

Leino³

et al. 2016

EECT

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“…The average particle diameter for the population is calculated at a given time by integrating the mass distribution function with respect to the particle diameter, D. A general description of the population balance model can be found in reference [2]. The basic form of the population balance used for this study follows that of Junk and Brown [92]: This formulation assumes that the chemical reaction rates are limited by diffusion. Gas-solid reactions that are limited by diffusion rates occur primarily on the surface of the particle and therefore the char is assumed to shrink uniformly in diameter while maintaining a constant density.…”

Section: Model Evaluation -Population Balancementioning

confidence: 99%

Carbon conversion during bubbling fluidized bed gasification of biomass

Timmer

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General Uncertainty Analysis B.2 Uncertainty in F B.3 Uncertainty in W C (t ss) B.4 Uncertainty in R e (t ss) B.5 Sample Uncertainty Calculations I also thank my family. I thank my immediate family: Karen my wife and our three daughters Ana, Sarah, and Katy. They are precious gifts which shower me with love, prayers, understanding, sacrifice, and support. I am also indebted to our extended family of parents and siblings for their prayers and encouragement. And to our church family at Trinity Christian Reformed Church in Ames for their friendship, love, prayers, and acts of kindness. They opened themselves to us and treated us like family, transforming a bearable situation into a blessing. I owe much to Dr. Robert Brown and to his colleague Jerod Smeenk. I value their friendship and the opportunity to share in their accumulated wisdom. Dr. Brown unselfishly committed himself to me and my situation. He faithfully and insightfully guided me along a direct path toward successful conclusion of this project. Jerod's patient, day-today instruction and organized and well maintained laboratory environment enabled me to complete my work in a timely fashion. My work also benefitted from diligent, competent, and responsible help in the laboratory. Fellow graduate student Nathan Nelson and laboratory associate Nicholas Sikes were always willing to help tackle equipment problems. Undergraduate assistants Karl Broer, Harrison Bucy, Mark Wright, and Nick Howard were assets in the lab, investing themselves in my research and success beyond what their wage required.

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“…The purpose of this research was to implement and evaluate an imaging system for monitoring the sur^e of a fluidized bed combustor (FBC). A fluidized bed combustor is a method for generating power and producing steam by burning coal and other low grade, variable quality fuels [12,15]. Problems can occur within the bed of the combustor that will influence the performance of the FBC.…”

Section: Introductionmentioning

confidence: 99%

An FMCW radar system for short range surface contour mapping

Latwesen

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A model of coal combustion dynamics in a fluidized bed combustor

Cited by 12 publications

References 25 publications

Modeling of particle size distribution of limestone in sulfur capture in air and oxy-fuel circulating fluidized bed combustion

Modeling of particle size distribution of limestone in sulfur capture in air and oxy-fuel circulating fluidized bed combustion

Carbon conversion during bubbling fluidized bed gasification of biomass

An FMCW radar system for short range surface contour mapping

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