Effective incineration of fuel-waste slurries from several related industries

• Published in: Environmental research Vol. 176; p. 108559
• Main Authors: Nyashina, Galina S., Vershinina, Ksenia Yu, Shlegel, Nikita E., Strizhak, Pavel A.
• Format: Journal Article
• Language: English
• Published: Netherlands Elsevier Inc 01-09-2019
• Subjects: Air Pollutants; Coal; Combustion; Disposal; Emissions; Incineration; Industrial Waste; Nitrogen Oxides; Waste-derived slurries; Wood; Industrial waste; Combustion; Disposal; Waste-derived slurries; Emissions
• ISSN: 0013-9351; 1096-0953
• DOI: 10.1016/j.envres.2019.108559

This study is based on the analysis of a set of industrial sectors (coal processing, wood processing, transport, oil, and water treatment) in order to identify the amount and type of combustible waste suitable for incineration. The main ignition and combustion parameters of these wastes have been experimentally obtained from their direct individual incineration in the original form and as part of a slurry based on wastewater. It has been established that a set of parameters allow waste-derived fuel mixtures to compete with coal dust and fuel oil with an environmental advantage. In particular, the concentration of sulfur and nitrogen oxides in the combustion products of all the tested slurries is 1.5–3 times as low as that of coal dust. Most of the wastes in question do not provide such advantages when burnt individually. We have assessed the fire safety of fuel mixtures and analyzed the prospects of mass waste incineration technologies. The calculations show that about 14–20% of coal and oil can be saved annually by extensively involving industrial waste in the energy sector. The experimental results obtained are the basis for the development of useful technologies for the safe and efficient combustion of waste from different industries.
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•The combustion heat of the studied slurries was 12.8–17.5 MJ/kg.•SOx and NOx emissions did not exceed 250 ppm and 390 ppm.•The efficiency of slurries compared to coal and fuel oil was within a range of 0.098–23.1.•More than 1500 million tons of different waste can be utilized in fuel slurries.•By burning waste-derived slurries, about 14–20% of coal and fuel oil may be saved.