The Grate-Firing Boilers Grate Movement Impact onto NOx, SO2 Emissions

Authors

  • Adolfas JANČAUSKAS Kaunas University of Technology, Faculty of Mechanical Engineering and Design, K. Donelaičio str. 73, LT-44249 Kaunas
  • Kęstutis BUINEVIČIUS UAB “ENERSTENA”, Centre for Research and Development, Ateities ave. 30A, LT-52163 Kaunas

DOI:

https://doi.org/10.5755/j01.mech.26.6.26034

Keywords:

grate moving, biofuel, emissions, NOx, SO2

Abstract

Measurements of pollutant concentrations in the flue gases of a biofuel boiler show that pollutants concentrations fluctuate by 10-100% and more at short time intervals. Large fluctuations in concentrations hinder the effective application of pollution reduction measures. During the research, flue gas composition measurements were performed in 4 MW, 8 MW industrial biofuel boilers and 20 kW experimental model. The results of the research showed that the change of CO, NO, NO2, SO2, H2S, O2 and particulate matter concentrations is related to the periodicity of the boiler grate movement. During the movement of the grate, the surface of the fuel bed is mechanically disrupted. The different composition of the fuel layers is mixed and this affects the changes in the concentration of combustion products. The clarity of the concentration fluctuations depends on the emissions, the type of fuel and the combustion parameters.

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Published

2020-12-07

Issue

Vol. 26 No. 6 (2020)

Section

MECHANICS OF FLUIDS AND GASES

License

The copyright for the articles in this journal is retained by the author(s) with the first publication right granted to the journal. The journal is licensed under the Creative Commons Attribution License 4.0 (CC BY 4.0).