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Use of waste material mixtures for energy purposes in small combustion devices

Author

Listed:
  • J. Malaťák

    (Department of Technological Equipment of Buildings, Faculty of Engineering, Czech University of Life Sciences Prague, Prague, Czech Republic)

  • J. Bradna

    (Research Institute of Agricultural Engineering, Prague, Czech Republic)

Abstract

The article assesses the energy use of solid biofuels (wheat and rape straw) and their blends with suitable additives (cocoa husks, brown coal and coal sludge). The elemental and stoichiometric analysis evaluates their suitability for energy recovery. Furthermore, thermal emission characteristics in automatic hot water boiler VERNER A251 are observed. The results of thermal emission measurements show that all samples meet the requirements of the Directive No. 13/2006 for carbon monoxide (2,000 mg/m3). The average nitrogen oxides emission concentrations exceed emission limits compared with the Directive No. 13/2006 (250 mg/m3) for all samples of solid biofuels. One reason is the high temperature in the combustion chamber that increases combustion temperature and results in high temperature of nitrogen oxides. Another problem is carbon monoxide that depends on the coefficient of excess air. The value of this coefficient drops under its optimum (2.5) and subsequently follows an increasing trend.

Suggested Citation

  • J. Malaťák & J. Bradna, 2014. "Use of waste material mixtures for energy purposes in small combustion devices," Research in Agricultural Engineering, Czech Academy of Agricultural Sciences, vol. 60(2), pages 50-59.
    • Handle: RePEc:caa:jnlrae:v:60:y:2014:i:2:id:78-2012-rae
    DOI: 10.17221/78/2012-RAE
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    References listed on IDEAS

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    1. Fiedler, Frank & Persson, Tomas, 2009. "Carbon monoxide emissions of combined pellet and solar heating systems," Applied Energy, Elsevier, vol. 86(2), pages 135-143, February.
    2. J. Malaťák & L. Passian, 2011. "Heat-emission analysis of small combustion equipments for biomass," Research in Agricultural Engineering, Czech Academy of Agricultural Sciences, vol. 57(2), pages 37-50.
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    Citations

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    Cited by:

    1. J. Velebil & J. Malaťák & J. Bradna, 2016. "Mass yield of biochar from hydrothermal carbonization of sucrose," Research in Agricultural Engineering, Czech Academy of Agricultural Sciences, vol. 62(4), pages 179-184.
    2. Jan Malaťák & Jiří Bradna, 2017. "Heating and emission properties of waste biomass in burner furnace," Research in Agricultural Engineering, Czech Academy of Agricultural Sciences, vol. 63(1), pages 16-22.
    3. János Jóvér & Károly Antal & József Zsembeli & Lajos Blaskó & János Tamás, 2018. "Assessment of gross calorific value of crop and bio-energy residues," Research in Agricultural Engineering, Czech Academy of Agricultural Sciences, vol. 64(3), pages 121-127.

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