Research of rheological properties improvement methods of coal-water fuel based on low-grade coal

Zenkov, А. V.; Ларионов, К. Б.; Yankovsky, S. A.; Лавриненко, С. В.

doi:10.1051/matecconf/201714101018

Cited by 3 publications

(1 citation statement)

References 11 publications

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“…The main problem with the use of granular mixed fuels in small-or large-scale power engineering, the solution for which is necessary when developing technologies for burning such fuels, is that, as established by the results of research [22], the ignition delay times of droplets and particles of any liquid [23,24], solid [25,26], or slurry [27,28] fuels significantly depend on the size of the particles (or droplets) [29]. The larger the size of these particles, the longer the ignition delay time, respectively [30].…”

Section: Introductionmentioning

confidence: 99%

Justification of the Energy Use of Cedar Husk Waste as an Environmentally Friendly Additive for Co-Combustion with Coal

et al. 2021

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In this paper, the properties of ignition of mixed fuel pellets formed on the basis of fairly typical energy coal and wood industry waste in the form of cedar husks are experimentally established. The technical characteristics of the initial fuel components and the mixtures based on them, the ignition delay times for different mass concentrations of biomass in coal, and the composition of flue gases formed during the thermal decomposition of these mixed fuels and their base components were determined. Pellets of mixed fuels were made by a hydraulic press. The experiments were performed in an air environment at temperatures from 600 °C to 800 °C. Recording of the processes of pellet ignition and combustion was carried out using a high-speed video camera with an image format of 1024 × 1024 pixels, and a frame rate up to 500 frames per second. The analysis of the flue gas composition was performed using a Test-1 factory gas analyzer (BONER Co.). It was found that the increase in the share of biomass up to 50% in the mixed fuel led to a significant reduction in the ignition delay time to less than 1 s and the sequestration of sulfur oxide emissions by 37.6% and of nitrogen oxides by 3.8% in the studied granular mixed fuels.

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Section: Introductionmentioning

confidence: 99%

Justification of the Energy Use of Cedar Husk Waste as an Environmentally Friendly Additive for Co-Combustion with Coal

et al. 2021

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Analysis of coal-water fuel flow structure in the process of coaxial spraying

Zenkov

Gvozdyakov

Губин

2019

International Youth Scientific Conference “Heat and Mass Transfer in the Thermal Control System of Technical and Technological

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Experimental studies of the influence of pressure of slurry fuel and air on the spray cone structure during atomization

Gvozdyakov

Zenkov

Губин

et al. 2019

«Izvestiya vysshikh uchebnykh zavedenii. PROBLEMY ENERGETIKI»

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Results of experimental studies of pneumomechanical atomization process of slurry fuel with a plasticizer in an aerodynamic simulator of power boiler furnace are presented. Analysis of the current state in the field of research of slurry fuel atomization processes has been conducted. Influence of pressure of slurry fuel and air on the structure of the emerging spray cone have been analyzed. The values of characteristic dimensions of three zones of spray cone have been determined: core, middle and outer zones. Effect of pressure of the sprayed slurry fuel and air on the period of stable spray cone formation and geometric characteristics of the zones has been experimentally confirmed. Ranges of velocities and sizes of droplets in the flow at various pressures have been distinguished. The quantitative values of slurry fuel droplets with different velocities in the process of its pneumatic spraying have been obtained. It has been established that the largest number of particles in the study area have velocities up to 8 m/s; a significant number of droplets (up to 20%) have velocities from 8 to 32 m/s; velocities of 32 m/s and more are typical for 1% of droplets. During the results processing, aerosol particles with a size of 1 micron or less have not been taken into account. The values of We criterion for the respective sizes and velocities of the sprayed fuel droplets have been determined. It has been established that significant part of the droplets undergoes catastrophic crushing, which is characteristic for the values of We numbers from 7800 and higher. The obtained results can be used for mathematical and physical modeling of the process of slurry fuels atomization in the furnaces of power boilers in order to predict the aerodynamic characteristics of the designed and existing units.

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Research of rheological properties improvement methods of coal-water fuel based on low-grade coal

Cited by 3 publications

References 11 publications

Justification of the Energy Use of Cedar Husk Waste as an Environmentally Friendly Additive for Co-Combustion with Coal

Justification of the Energy Use of Cedar Husk Waste as an Environmentally Friendly Additive for Co-Combustion with Coal

Analysis of coal-water fuel flow structure in the process of coaxial spraying

Experimental studies of the influence of pressure of slurry fuel and air on the spray cone structure during atomization

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