Organic coal-water fuel: Problems and advances (Review)

Glushkov, Dmitrii O.; Стрижак, П. А.; Chernetskii, M. Yu.

doi:10.1134/s0040601516100037

Cited by 93 publications

(43 citation statements)

References 33 publications

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“…In particular, the works [11,12] show that CWS compositions based on coal filter cakes are ignited sustainably at temperatures within the range of 500 °C to 700 °C. Since sustainable ignition is possible at low temperatures, the concentrations of hazardous emissions in this case will be minimal and the underburning will change negligibly.…”

Section: Resultsmentioning

confidence: 99%

“…Another reason to switch to lower temperatures of fuel combustion is that, with many coal processing wastes, mixing them with water helps to reduce the limit (minimum) ignition temperatures (due to micro explosions [11]). In particular, the works [11,12] show that CWS compositions based on coal filter cakes are ignited sustainably at temperatures within the range of 500 • C to 700 • C. Since sustainable ignition is possible at low temperatures, the concentrations of hazardous emissions in this case will be minimal and the underburning will change negligibly.…”

Section: Resultsmentioning

confidence: 99%

“…This results from the need to meet several objectives [8,9]: to reduce the dispersion of sulfur and carbon oxides during coal combustion, to expand the raw material resources base in order to produce fuels from the corresponding wastes, to improve combustion efficiency of low-rank coals, and to utilize organic wastes and black oils more effectively. According to the feasibility studies of typical coal processing wastes involved in the power generation cycle in Russia [11], filter cakes generated during coal flotation at processing factories are the most favorable option due to their high annual increment. However, the environmental issue of using such coal processing wastes remains open.…”

Section: Introductionmentioning

confidence: 99%

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Environmental Potential of Using Coal-Processing Waste as the Primary and Secondary Fuel for Energy Providers

2017

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Abstract:The main anthropogenic emissions (CO, CO 2 , NO x , SO x ) produced by the processing (combustion) of wastes (coal filter cakes) were measured directly for the first time. The research considered the most widespread coal filter cakes: those of nonbaking, low-caking, coking, flame, and gas coals. These filter cakes are regarded as promising components for the technologies of coal-water slurry (CWS) and coal-water slurry containing petrochemicals (CWSP). According to our estimates, the annual increment of such wastes in the world is as high as 100 million tons. Consequently, the effective utilization of these wastes in the power industry is of high interest. The evaluation of hazardous emissions from the combustion of such wastes shows that filter cakes produce a similar amount of CO and CO 2 as the initially-used coals but filter cakes are more cost-effective. We have established that CWS and CWSP technologies can be used to reduce NO x and SO x emissions. To reduce CO and CO 2 emissions when burning filter cakes, we need to switch to low-temperature combustion. Lowering the combustion temperature of filter cakes from 850 • C down to 650 • C decreases the underburning insignificantly while decreasing CO and CO 2 emissions by 30-40%.

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Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Environmental Potential of Using Coal-Processing Waste as the Primary and Secondary Fuel for Energy Providers

2017

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“…It would be very useful to establish the necessary and sufficient conditions of enhanced vaporization. These conditions are critical in such technologies as thermal and flame water purification (Vysokomornaya et al, 2018), syngas production (Zaitsev et al, 2018a), composite fuel production (Glushkov et al, 2016), etc. The critical conditions considerably differ during heating and evaporation of droplets in gaseous media or at the walls of heat chambers.…”

Section: Introductionmentioning

confidence: 99%

Using Planar Laser-Induced Fluorescence to Study the Phase Transformations of Two-Component Liquid and Suspension Droplets

Волков

Кузнецов

2018

Interfac Phenom Heat Transfer

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Using the planar laser-induced fluorescence (PLIF), we performed experiments to determine evaporation dynamics of homogeneous and heterogeneous droplets of liquids, conditions of their boiling, and explosive breakup. For the 1-2 mm water droplets, the distribution of highly non-homogeneous and non-steady temperature field was detected by highspeed cross-correlation video recording and the Tema Automotive software. We identified highly nonlinear dependences of evaporation rate on heating temperature and time as well as water droplet size. For the two-component liquids and water-based suspensions of graphite, we revealed unsteady temperature fields and established mechanisms and regimes of the explosive breakup of the heterogeneous droplets when heated. The regimes differ in the number and dimensions of the emerging gas-liquid fragments as well as the durations of the main stages. The three regimes of warming-up and evaporation of the heterogeneous droplets have been obtained. The explosive breakup of droplets enables provision for the secondary atomization of the liquid with the emergence of an aerosol cloud. The surface area of the liquid increases several-fold. The temperature variations at the water/solid or water/flammable component interfaces were determined corresponding to each boiling and breakup regime. Using the PLIF, we studied reasons and mechanism of the explosive breakup of water droplets with single large carbonaceous inclusions when heated.

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“…Highly promising direction in the development of CWS subjects is to create new composite liquid fuels on their basis (CWS containing petrochemicals) that consists of three main components: coal, water and combustible petrochemicals (motor, turbine, transformer, transmission oils) [9][10][11][12]. Results of combustion processes research of such fuels let us develop the theoretical bases of recycling technology for a large group of industrial facilities to energy production.…”

Section: Introductionmentioning

confidence: 99%

Conditions and Characteristics of Coal Water Slurry Containing Petrochemicals Ignition by Hot Particle

et al. 2016

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Characteristics of CWS containing petrochemicals ignition by single hot particle in disk shape established experimentally. The main components of fuel composition are coal 45 %, water 45 %, used engine oil 10 %. The main parameters of local heat sources are: material -steel, diameter 10-12 mm, high 4-8 mm. As a result of experimental study is established limit (minimum) conditions for ignition of CWS containing petrochemicals by hot particle and the impact of local heat source parameters on the main process characteristic -ignition delay time.

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Organic coal-water fuel: Problems and advances (Review)

Cited by 93 publications

References 33 publications

Environmental Potential of Using Coal-Processing Waste as the Primary and Secondary Fuel for Energy Providers

Environmental Potential of Using Coal-Processing Waste as the Primary and Secondary Fuel for Energy Providers

Using Planar Laser-Induced Fluorescence to Study the Phase Transformations of Two-Component Liquid and Suspension Droplets

Conditions and Characteristics of Coal Water Slurry Containing Petrochemicals Ignition by Hot Particle

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