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Emission of Harmful Substances from the Combustion of Wood Pellets in a Low-Temperature Burner with Air Gradation: Research and Analysis of a Technical Problem

Author

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  • Bartosz Ciupek

    (Department of Fuels and Renewable Energy, Faculty of Environmental Engineering and Energy, Institute of Thermal Energy, Poznan University of Technology, 60-965 Poznan, Poland)

  • Zbigniew Nadolny

    (Department of High Voltage and Electrotechnical Materials, Faculty of Environmental Engineering and Energy, Institute of Power Engineering, Poznan University of Technology, 60-965 Poznan, Poland)

Abstract

This paper includes a discussion of the results of tests concerning changes in the thermal and emission parameters of a boiler fuelled with wood biomass under the influence of air gradation in the combustion process. The test results ensure insight into the combustion process of wood biomass with air gradation, which significantly affected the operation of the device, increasing the mass concentration of the emitted nitrogen oxide (NO x ) by combustion temperature lowering, especially in the afterburning zone. The authors observed an increase in the emission of particulate matter (PM) and carbon monoxide (CO) related to the change in the combustion process stoichiometry. The tests were carried out with the use of a heating boiler equipped with an automatic pellet burner. Apart from the mass concentration measurement of the pollution emitted, the tests focused on the measurements of temperature and oxygen levels in the flue gas. The objective of the tests was to confirm the applicability of the air gradation techniques in biomass combustion in order to reduce the emission of harmful substances from heating boilers, which is a technique that has recently been used in this group of devices. The test results obtained confirm the necessity for reorganising the technical systems of the currently used pellet burners and implementing further empirical tests.

Suggested Citation

  • Bartosz Ciupek & Zbigniew Nadolny, 2024. "Emission of Harmful Substances from the Combustion of Wood Pellets in a Low-Temperature Burner with Air Gradation: Research and Analysis of a Technical Problem," Energies, MDPI, vol. 17(13), pages 1-16, June.
    • Handle: RePEc:gam:jeners:v:17:y:2024:i:13:p:3087-:d:1420192
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    References listed on IDEAS

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    1. Guo, Feihong & Liu, Weizhen & He, Yi & Li, Xinjun & Zhang, Houhu, 2024. "Study on the combustion characteristics and pollutant emissions of cold-pressed pellets and pellet powders in fluidized-bed," Renewable Energy, Elsevier, vol. 220(C).
    2. Tianshi Zhang & Ziming Mo & Xiaoyu Xu & Xiaoyan Liu & Haopeng Chen & Zhiwu Han & Yuying Yan & Yingai Jin, 2022. "Advanced Study of Spray Cooling: From Theories to Applications," Energies, MDPI, vol. 15(23), pages 1-40, December.
    3. Daqing Zu & Keyu Zhai & Yue Qiu & Pei Pei & Xiaoxian Zhu & Dongho Han, 2020. "The Impacts of Air Pollution on Mental Health: Evidence from the Chinese University Students," IJERPH, MDPI, vol. 17(18), pages 1-15, September.
    4. Ma, Dafu & Zhang, Shouyu & He, Xiang & Zhang, Jian & Ding, Xian, 2023. "Combustion stability and NOX emission characteristics of a 300 MWe tangentially fired boiler under ultra-low loads with deep-air staging," Energy, Elsevier, vol. 269(C).
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