Coal-water slurry atomization in a new pneumatic nozzle and combustion in a low-power industrial burner

Shadrin, E. Yu.; Ануфриев, И. С.; Butakov, E. B.; Kopyev, E. P.; Алексеенко, С. В.; Maltsev, L. I.; Шарыпов, О. В.

doi:10.1016/j.fuel.2021.121182

Cited by 33 publications

(34 citation statements)

References 39 publications

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“…Composite liquid fuels generically include several components to form a homogeneous mixture of combustible and non-combustible components, solid and liquid. The most popular solid combustible components are coals [11][12][13]39,40] and their derivatives (sludge, filter cake, middlings, semi-coke) [6,9,41]. Peats, solid carbon-containing industrial waste (for example, tire pyrolysis residues) [7], and organic components (sawdust, nutshells and husks, dried algae) [16,17,[42][43][44] can also be successfully utilized in the energy sector as part of CLFs.…”

Section: Coal-water and Organic-coal-water Suspensionsmentioning

confidence: 99%

“…Water is a non-combustible binder in fuel suspensions, where the mass fraction of water can be up to 50% [11][12][13]39,40]. However, suspensions of the listed components are characterized by composition instability due to certain stratification.…”

Section: Coal-water and Organic-coal-water Suspensionsmentioning

confidence: 99%

“…Fuel feed lines of CLFs are more prone to corrosion and erosion, since chemically aggressive components are included in the compositions (this applies to water at least). CLF combustion products also have more profound corrosion impact on heat exchange surfaces and smoke removal lines [13,14]. Water-fuel suspensions are characterized by low stability, which complicates their storage, transportation, and their very combustion.…”

Section: Introduction 1relevance Of Composite Liquid Fuelsmentioning

confidence: 99%

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Spraying of Composite Liquid Fuels Based on Types of Coal Preparation Waste: Current Problems and Achievements: Review

2021

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This article discusses the atomization of composite liquid fuels. A large group of injectors is considered. A comparative analysis of the atomization characteristics (droplet sizes and velocities, jet opening angles) and the influence of the fuel characteristics (density, viscosity, component composition) and the process parameters (the ratio of the fuel–air mass flow rates, the features of the jet formation) has been carried out. Finally, the most effective types of injectors, which provide for the necessary characteristics of fuel atomization for its combustion, have been determined. The most favorable conditions for the applicability of each type of atomization have been formulated. Possible mechanisms of secondary fragmentation of droplets of composite fuels have been analyzed: those resulting from mutual collisions of droplets in the flux and from the interaction with a solid surface as well as those resulting from thermal overheating in the presence of a phase boundary or a large gradient of component volatility. A conclusion is made about the need of using a synergistic effect of primary and secondary atomization of fuel suspension droplets.

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Section: Coal-water and Organic-coal-water Suspensionsmentioning

confidence: 99%

Section: Coal-water and Organic-coal-water Suspensionsmentioning

confidence: 99%

Section: Introduction 1relevance Of Composite Liquid Fuelsmentioning

confidence: 99%

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Spraying of Composite Liquid Fuels Based on Types of Coal Preparation Waste: Current Problems and Achievements: Review

2021

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“…With the help of computer vision methods, it is possible to identify a flame, perform its localization, analyze its behavior both in a limited and in a large open space. At present, the use of these automated methods in industry is of undoubted practical and scientific interest [3].…”

Section: Introductionmentioning

confidence: 99%

Experimental studies of the combustion of pulverized coal to form the basis for training a neural network

Butakov

Pochtar

Vinogradov

et al. 2022

J. Phys.: Conf. Ser.

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In this paper, we considered the solution to the problem of efficient and environmentally friendly combustion of hydrocarbon-containing fuels and the prevention of emergencies in combustion chambers and boiler plants. On the basis of the existing scientific background and the existing instrumental and experimental base, modern technologies for automating the combustion process using machine learning methods have been developed. Automation will reduce energy costs and prevent possible emergencies at thermal power plants and combustion chambers. The approbation of the technology and the formation of a data corpus for training the network was carried out using semi-industrial fire installations with a thermal power of about 5 MW, which make it possible to vary the parameters of fuel combustion in a wide range and, accordingly, to implement various combustion modes.

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“…Therefore, it is of great interest to study the processes of ignition and the initial stage of combustion of particles of dust suspension of coals under thermal conditions close to real furnaces. In addition, the characteristic times for mechanically activated milling of fuels are fractions of a second with possible short-term retention of highly reactive properties of coal particles after milling, which requires studies of the chemical activity of fuels also under conditions of rapid thermal decomposition [6][7][8][9]. The methodology for studying the ignition and IOP Publishing doi:10.1088/1742-6596/2233/1/012018 2 combustion of a dust suspension when it is fed in portions into a VTF corresponds to these conditions to the maximum extent.…”

Section: Introductionmentioning

confidence: 99%

Determination of the ignition temperature of mechanically activated carbon of various degrees of metamorphism and type of grinding

Кузнецов

Pochtar

Vinogradov

et al. 2022

J. Phys.: Conf. Ser.

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The experiments carried out using two methods of TGA (thermogravimetric analysis) made it possible to determine the ignition temperatures for brown coal, hard coal and anthracite treated both with activator mills (VCM, disintegrator) and with a standard hammer mill (initial coal). Practically all the results of coal ignition obtained by different methods correlate with each other. They show a decrease in the ignition temperature of micromilled coals during mechanically activated grinding. The analysis of the results of experimental studies made it possible to calculate kinetic parameters such as the ignition index, the maximum burning rate, the burnout index, and the comprehensive index. The data obtained are new and prove the effectiveness of mechanical activation treatment of coal fuel.

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Coal-water slurry atomization in a new pneumatic nozzle and combustion in a low-power industrial burner

Cited by 33 publications

References 39 publications

Spraying of Composite Liquid Fuels Based on Types of Coal Preparation Waste: Current Problems and Achievements: Review

Spraying of Composite Liquid Fuels Based on Types of Coal Preparation Waste: Current Problems and Achievements: Review

Experimental studies of the combustion of pulverized coal to form the basis for training a neural network

Determination of the ignition temperature of mechanically activated carbon of various degrees of metamorphism and type of grinding

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