The need of applying new approaches for using ash produced at coal-fired thermal power stations

Delitsyn, L. M.; Vlasov, A. S.

doi:10.1134/s0040601510040087

Cited by 13 publications

(5 citation statements)

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“…The issue of increasing the efficiency of obtaining energy through power stations has been already discussed for years (Delitsyn and Vlasov 2010 ; Belošević et al 2015 ; Bukhonov and Morozov 2003 ). The need to increase the energy efficiency comes not only from the limited resource of fossil fuels but above all from the need to reduce emissions of harmful substances, both gases (sulfur dioxide, carbon dioxide, nitrogen oxides) and particulates (dust and solid waste which are collected on landfills).…”

Section: Introductionmentioning

confidence: 99%

Studies on CWL with glycerol for combustion process

Staroń

Kowalski

Staroń

et al. 2018

Environ Sci Pollut Res

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Findings of more efficient energy recovery methods are focused on composite fuels consisting of coal, water, and waste materials. The use of such slurry fuels has enormous environmental benefits due to the potential for waste utilization and low emissions of harmful oxides to the atmosphere during the combustion process. In this study, we report the effect of waste glycerol on the rheological properties of coal-water fuel (CWS). The addition of glycerol to CWS increases the viscosity (from 45.5 to 184.2 mPa·s at a shear rate of 100 rpm) and density (from 1.08 to 1.11 g/cm3) of these suspensions. The utility of choice of the most favorable parameters is equal to 0.85 for both CWS and CWS with added glycerol. Due to the fact that CWS is dosed to heated chamber, its modification with glycerol results in easier nebulization into the combustion chamber, lowering of the solidification temperature and increasing the calorific value of the resulting fuel. During combustion of CWS with glycerol, the amount of SO2 and NOx emitted is reduced by half as compared to the emission of these gases during hard coal combustion.

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Section: Introductionmentioning

confidence: 99%

Studies on CWL with glycerol for combustion process

Staroń

Kowalski

Staroń

et al. 2018

Environ Sci Pollut Res

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“…Over the past 20–25 years, the world’s scientific community has developed a group of waste-disposing technologies of coal processing. In particular, it is possible to highlight the preparation of coal–water slurry (CWS) and its burning in power plants, − the processing of the resulting ash for use in the construction of buildings and roads, , its application in chemical and petrochemical productions, and other uses. Surely, large amounts (millions of tons) of coal conversion waste emerging annually are difficult to recycle only for the construction, chemical, and petrochemical industries.…”

Section: Introductionmentioning

confidence: 99%

Burning Properties of Slurry Based on Coal and Oil Processing Waste

2016

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The main physicochemical coefficients of the components and of the tested coal−water slurry containing petrochemicals (CWSP) have been collected. The viscosity, mixture stability, density, ash content, humidity, flash and ignition temperatures, and enthalpy of combustion of the tested CWSP are reported. The temperatures of combustion of fuel compositions with different concentrations of solid and liquid components have been measured, as well as the important parameters: the ignition time delays of droplets (radius 0.25−2.5 mm) and the times required to reach their complete burning. The study allows determination of the optimal fuel compositions yielding the shortest ignition time delays, the longest times to complete burning, the highest temperatures of combustion, and the maximum enthalpy of combustion. It is found that the viscosity of CWSP is dependent almost proportionally on the moisture content of components. It is shown that the calorific value of CWSP is dependent proportionally on the calorific value of components. It is revealed that the ignition delay times of CWSP are dependent significantly on the degree of coal metamorphism and the volatiles content, as well as on the heat of vaporization and the boiling point of added flammable liquids. Important experimental data are obtained, which allow prediction of the CWSP composition with the desired properties of components, for which the following characteristics are known: calorific value, moisture content, ash content, volatile content, heat of vaporization, boiling point, and other characteristics considered.

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“…The AS waste sites cause air and water pollution and damage landscapes, which has an essential adverse impact on the environment in adjacent areas. The composition of AS mainly includes oxides of silicon, aluminum, iron, alkali and alkali-earth metals, which makes this kind of waste a valuable source of minerals for production of silicate materials for the road and civil construction [3][4][5][6][7][8][9][10][11].…”

Section: Introductionmentioning

confidence: 99%