A comparison of ignition characteristics of slurry fuels prepared using coal processing waste and finely divided coal

Vershinina, K. Yu.; Shlegel, N.E.; Стрижак, П. А.

doi:10.1016/j.joei.2018.06.001

Cited by 10 publications

(8 citation statements)

References 33 publications

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“…Comparing the obtained results on the ignition delay times with the known ones, [64][65][66] it can be concluded that isopropyl alcohol in the composition of coal-water fuel (at a mass concentration of no more than 8%) allows reducing the ignition delay time of CWF droplets in comparison with organo-coal-water fuels [64][65][66] by 10% to 40%. This advantage of coal-water fuels with isopropyl alcohol makes them competitive in terms of energy criteria relative to three-component organo-coal-water fuels.…”

Section: Results Of Ignition Experimentsmentioning

confidence: 84%

“…The ignition delay times for droplets of less than 1 mm in size will be significantly less than those F I G U R E 1 0 Dependences of ignition delay times of CWF droplets (solid lines) and ACWF: A, D ≈ 1.5 mm; B, D ≈ 2.5 mm; C, D ≈ 3.5 mm [Colour figure can be viewed at wileyonlinelibrary.com] obtained for droplets of 1.5 mm in size, as follows from the general theory of ignition of coal-water fuel droplets. 63 Comparing the results of experimental studies of the ignition delay times of single droplets of coal-water suspensions with addition of isopropyl alcohol with a similar characteristic for three-component CWF [64][65][66] with addition of waste oils, we can conclude about the advantages of ACWF according to energy and economic criteria. Table 4 shows the values of the main ignition characteristic for several types of coal-water fuels prepared using coal processing waste, spent petroleum products, and metal powder 66 as the third component (at T = 873 K, D = 1.5 mm).…”

Section: Results Of Ignition Experimentsmentioning

confidence: 99%

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Ignition of coal‐water fuel droplets with addition of isopropyl alcohol

2020

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Coal-water fuels have been actively studied in the last decade due to the fact that when they are burned in the furnaces of steam and hot-water boilers, much less anthropogenic oxides of sulfur, nitrogen, and carbon are formed in comparison with coal. The main problem that hinders the widespread introduction of such fuels in the energy sector is long (up to 30 seconds) ignition delay times. Significant (10%-50%) reduction in the ignition delay time is possi

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Section: Results Of Ignition Experimentsmentioning

confidence: 84%

Section: Results Of Ignition Experimentsmentioning

confidence: 99%

Ignition of coal‐water fuel droplets with addition of isopropyl alcohol

2020

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“…In earlier works (for example, Vershinina and colleagues [35,36]) that dealt with atypical fuel mixtures from wastes, specific multi-criteria analysis methods were not used. The dimensionless ratios of several parameters when compared with coal or fuel oil were used in these studies.…”

Section: Discussion Of Resultsmentioning

confidence: 99%

“…However, the fact of interest is that despite the difference in the calculation procedures in the present work and previous studies, the total efficiency indicator for fuel waste-derived slurries was still higher than for coal or close to it. Of course, the methods used in Vershinina and colleagues [35,36] were more limited since they did not explicitly present the variability of priorities and all the assessments were performed without any reference to the region or enterprises. In contrast, this study aimed to apply the MCDA tools to the assessment of waste-based fuels for different countries by taking into account different economic, social, and environmental priorities.…”

Section: Discussion Of Resultsmentioning

confidence: 99%

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Multi-Criteria Efficiency Analysis of Using Waste-Based Fuel Mixtures in the Power Industries of China, Japan, and Russia

et al. 2020

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This paper presents the results of analyzing the efficiency of the following five fuel types: dry coal, wet coal processing waste, coal–water slurry, and two waste-derived slurries. In the calculations, we employed 16 criteria related to the energy industry, economy, social aspects, safety at plants, and environmental protection. We used the experimental data, obtained from the combustion of the fuels under study at three heating temperatures (700 °C, 800 °C, and 900 °C). Three countries were analyzed, where all of them have a high share of using fossil fuels in the energy industry: Japan, China, and Russia. The total performance indicator was calculated using three multiple-criteria decision analysis techniques (weighted sum method, weighted product method, and analytic hierarchy process). The choice of weight coefficients was confirmed for each method. We found that coal and coal–water slurry had the lowest integral efficiency indicators (0.016–0.535 and 0.045–0.566, respectively). The maximum effect was achieved when using waste-derived slurry with used turbine oil (0.190–0.800) and coal processing waste (0.535–0.907). There were, on average, 3%–60% differences in the integral efficiency indicator for the same fuel in different countries. The difference in the efficiency indicator of the same fuel in different countries was on average 3%–60%; with changes in temperature, the difference in efficiency was 5%–20%; and when changing the calculation procedure, the difference was 10%–90%.

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