Ignition of coal-water fuels made of coal processing wastes and different oils

Vershinina, K. Yu.; Lapin, D. A.; Lyrschikov, Sergey Yu.

doi:10.1016/j.applthermaleng.2017.09.029

Cited by 15 publications

(7 citation statements)

References 30 publications

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“…Several reliable models of this kind will help optimize liquid spraying parameters in gas-and vapor-droplet technologies [26], where it is especially important to control and predict the gas-vapordroplet composition. These include thermal and flame water treatment [27], heat exchange technologies of evaporation and condensation in heat and power ducts, units, and blocks [28]; heat carriers from flue gases, water droplets and vapors [29]; ignition of composite fuels without injector clogging or jet fading in combustion chambers [30]; temporally and spatially distributed gas-vapor-droplet mixture supply to combustion zones for the effective fire containment and suppression [31]. One of the numerous practical applications of the experimental results is the atomization of liquid and slurry fuels in internal combustion engine chambers or in power plant furnaces to improve their performance.…”

Section: Evaluation Of Minimum Disruption Times and Degree Of Atomizationmentioning

confidence: 99%

Interaction times of homogeneous and heterogeneous droplets in gases

et al. 2021

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In this research, we present the results of experiments measuring the interaction times of colliding liquid droplets in different modes (bounce, coalescence, separation, and disruption). The experiments involve water and typical water-based slurries, emulsions, and solutions. The main experimental parameters are close to those of high-potential gas-vapor-droplet technologies (heat and mass transfer power plants, thermal and flame water treatment systems, and fuel technologies): droplet size 0.1-5 mm; velocities 0.1-10 m/s; liquid temperature 20-80 ?C; impact angle 0-90?; relative volume and mass fractions of liquid and solid additives in water 0-10%. We explore how a set of parameters and effects influence the characteristics of the processes under study. The most important of these parameters are relative droplet velocity, impact angle, impact parameter, and temperature. Using dimensionless linear and angular interaction parameters as well as the Weber, Reynolds and Ohnesorge numbers, we produce interaction mode maps to consider the correlation of the main forces: inertia, surface tension, and viscosity. We determine the interaction times, number, size, and total surface area of the newly formed post-collision droplets and obtain approximations for the experimentally determined functions.

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Section: Evaluation Of Minimum Disruption Times and Degree Of Atomizationmentioning

confidence: 99%

Interaction times of homogeneous and heterogeneous droplets in gases

et al. 2021

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“…According to the research findings, the CWSP application instead of the widespread solid fossil fuel and fuel oil to generate heat and electricity provides positive effects. The development and introduction of CWSP technologies in thermal power engineering will allow for utilizing large volumes of industrial waste to produce energy . This will expand the nomenclature of energy resources , by involving unclaimed combustible industrial wastes in thermal power engineering: wet waste of coal enrichment, low-grade coals, waste oils (motor, transmission, turbine, transformer etc.…”

Section: Prospects Of Cwsp Applicationmentioning

confidence: 99%

“…The development and introduction of CWSP technologies in thermal power engineering will allow for utilizing large volumes of industrial waste to produce energy. 15 This will expand the nomenclature of energy resources 62,63 by involving unclaimed combustible industrial wastes in thermal power engineering: wet waste of coal enrichment, low-grade coals, waste oils (motor, transmission, turbine, transformer etc. ), and other flammable liquids, contaminated wastewater, and so forth.…”

Section: Prospects Of Cwsp Applicationmentioning

confidence: 99%

“…The development of new technologies for industrial thermal power engineering will allow large-scale utilization of the numerous combustible wastes of coal enrichment and oil refining, which has not been demanded so far. Thus, expansion of the fuel base due to the involvement of industrial waste is one of the current trends in the development of thermal power engineering. , In this case, it is possible to create effective composite fuels. Such fuels, depending on the component composition, are called coal–water slurries (CWSs) or CWSPs.…”

Section: Introductionmentioning

confidence: 99%

“…Thus, expansion of the fuel base due to the involvement of industrial waste is one of the current trends in the development of thermal power engineering. 14,15 In this case, it is possible to create effective composite fuels. Such fuels, depending on the component composition, are called coal− water slurries (CWSs) or CWSPs.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

A Mathematical Model for Processes in Coal–Water Slurries Containing Petrochemicals under Heating

2018

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One of the promising directions for improving the environmental, technical, and economic efficiency of coal-fired thermal power plants is the use of the multicomponent fuels based on coal and combustible liquids. Such fuels, as a rule, are called coal–water slurries containing petrochemicals (CWSPs). The typical wastes of coal enrichment, low-grade coals, oil production, and oil refining wastes as well as used flammable liquids, for example oils, can be included in the fuel composition. To date, mathematical models have not been developed for predicting the effective conditions for the ignition of promising CWSPs at minimum ambient temperatures and with short ignition delay times. This problem was solved in the present work. On the basis of the experimental results, three modes of physical and chemical transformations were established when heating single particles of the composite fuel. The first one is the intensive thermal decomposition of the coal component after evaporation of the liquid components of the fuel. Then goes the gasification of coal under the boiling conditions of the liquid components followed by the heterogeneous combustion of the solid residue. The third mode is the ignition of the gas mixture in the vicinity of the fuel particle and initiation of heterogeneous combustion of the solid residue. The temperature ranges of the environment were determined under which the detected modes of the physical and chemical transformations occur. The obtained experimental data became the basis for the development of a predictive mathematical model of the transformations that occur when heating a composite fuel with different characteristics of the components. It takes into account the interrelated physical and chemical processes: inert heating, evaporation, thermal decomposition, and exothermic reaction. The developed mathematical model and the results of the theoretical studies make it possible to establish the influence of the characteristics of the fuel components and the conditions of its heating on the three identified modes of physical and chemical transformations.

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