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Oscillating Combustion for NOₓ-Reduction in Pulverized Fuel Boilers

Jolibois, Nicklas; Gehrmann, Hans Joachim 1; Aleksandrov, Krasimir 1; Hauser, Manuela 1; Stapf, Dieter 1; Seifert, H. 1; Waibel, Patrick 2; Vogelbacher, Markus ORCID iD icon 2; Matthes, Jörg 2
1 Institut für Technische Chemie (ITC), Karlsruher Institut für Technologie (KIT)
2 Institut für Automation und angewandte Informatik (IAI), Karlsruher Institut für Technologie (KIT)

Abstract (englisch):

Thermal power plants in various fields of application are regularly adapted to the latest emission standards, applying the "Best Available Techniques Reference".
In recent years, new, stricter limit values have been in force in the power plant sector for power plant units with a thermal output of more than 300 MW that are operated with hard coal. In order to achieve the new limits, e.g. for NOX emissions, downstream reduction processes (Selective Non-Catalytic Reduction, SNCR or Selective Catalytic Reduction) are usually used, which causes an increase of operating fluids (essentially ammonia water).
With an experimentally validated and patented process in which pulverized fuel is fed by oscillation via a swirl burner into a pilot combustion chamber, nitrogen oxides can be reduced without further measures, for example from 450 mg/mN³ in non-oscillation mode (0 Hz) to 280 mg/ mN³ in oscillation mode (3.5 Hz), normalized to an O2 content of 6 % in each case.
Particularly promising are the experiments that use the oscillation of part of the burnt-out air (combustion gas) instead of the fuel in order to minimize, e.g., the wear of the oscillator.
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Postprint §
DOI: 10.5445/IR/1000146790
Frei zugänglich ab 01.01.2024
Zugehörige Institution(en) am KIT Institut für Automation und angewandte Informatik (IAI)
Institut für Technische Chemie (ITC)
Publikationstyp Proceedingsbeitrag
Publikationsjahr 2022
Sprache Englisch
Identifikator KITopen-ID: 1000146790
HGF-Programm 38.05.01 (POF IV, LK 01) Anthropogenic Carbon Cycle
Erschienen in 13th European Conference on Industrial Furnances and Boilers (INFUB-13)
Veranstaltung 13th European Conference on Industrial Furnaces and Boilers (INFUB 2022), Albufeira, Portugal, 19.04.2022 – 22.04.2022
Verlag Centro de Energia e Tecnologia (CENERTEC)
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