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Influence of preparation and combustion parameters of coal-water slurries on gas emission chemistry

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Abstract

The article presents the results of experimental studies performed for the comparative analysis of factors affecting the concentration of the main gas emissions during the combustion of fuel suspensions obtained from coal enrichment waste. The factors influencing the formation of anthropogenic emissions during the flaring of coal-water fuel suspensions were investigated. Experiments were carried out with coal processing waste, both with and without additives in the form of spent mineral oil. The article shows how the concentration of sulfur dioxide, nitrogen dioxide, and hydrocarbons is affected by the parameters of preparation (particle size, solid–liquid phase ratio, additives of used engine oil) and flame combustion (temperature in the combustion chamber, excess air coefficient, and droplet size after spraying) of fuel suspensions. The ranges of parameters were selected at which the best combustion parameters are observed, based on the data obtained: degree of grinding is less than 100 μm, solid part content in the suspension is from 55 to 60%; combustion temperature is in the range from 950 to 1050° C, droplet size when spraying the suspension is less than 300 μm, additive of waste mineral oil is from 3 to 7 wt.%. and air–fuel ratio from 1.2 to 1.3.

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Data availability

All data generated or analyzed during this study are included in this scientific work (https://spmi.ru/sverchkov-ivan-pavlovich).

Abbreviations

Ad :

Ash content on dry state, %

Vdaf :

Yield of volatiles converted to a dry ash-free state, %

Cd, Hd, Nd, Sd, Od :

Fraction of carbon, hydrogen, nitrogen, sulfur, and oxygen converted to a dry state, %

Qi d :

Net calorific value of dry fuel at constant pressure, MJ/kg

CWS:

Coal-water slurry

CWSP:

Coal-water slurry containing petrochemicals

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Authors and Affiliations

  1. Saint Petersburg Mining University, 2, 21st Line, St. Petersburg, 199106, Russia

    Ivan Sverchkov, Mariia Chukaeva & Vera Matveeva

Authors
  1. Ivan Sverchkov
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  2. Mariia Chukaeva
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  3. Vera Matveeva
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Contributions

All authors contributed to the study conception and design. Material preparation, data collection, and analysis were performed by Ivan Sverchkov, Mariia Chukaeva, and Vera Matveeva. The first draft of the manuscript was written by Ivan Sverchkov, and all authors commented on previous versions of the manuscript. All authors read and approved the final manuscript.

- Conceptualization: IS formulated the idea of the research, and VM formulated the goals and aims.

- Methodology: IS designed an experimental stand for flaring liquid fuels and set up an experiment, and MC designed a method for sampling and analyzing samples.

- Formal analysis and investigation: IS and MC used statistical and mathematical methods to analyze the data obtained.

- Writing—original draft preparation: IS wrote the initial draft.

- Writing—review and editing: IS and MC prepared, created, and presented the published work, and VM prepared a critical review of scientific work.

- Supervision: VM carried out supervision and responsibility for the planning and execution of research activities.

Corresponding author

Correspondence to Ivan Sverchkov.

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All authors certify that they have no affiliations with or involvement in any organization or entity with any financial interest or non-financial interest in the subject matter or materials discussed in this manuscript.

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Responsible Editor: Philippe Garrigues

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Highlights

− Hydrocarbons, SO2, and NO2 concentrations can be reduced by 40, 70, and 25%, respectively.

− The smallest hazard of pollutants is observed at flame temperature in the range 950–1050 °C.

− Adding from 3 to 7 wt.% of waste oil in fuel suspensions allows to obtain better energy characteristics without a significant increase of the pollutants concentrations.

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Sverchkov, I., Chukaeva, M. & Matveeva, V. Influence of preparation and combustion parameters of coal-water slurries on gas emission chemistry. Environ Sci Pollut Res 29, 44042–44053 (2022). https://doi.org/10.1007/s11356-022-19038-9

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  • DOI: https://doi.org/10.1007/s11356-022-19038-9

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