Title:
Reduction of NOx and PM1 Emissions from Automated Boilers by Advanced Air Staging
Author(s):
Hesch, T., Biedermann, F., Brunner, T., Obernberger, I.
Document(s):
Paper
Abstract:
This paper presents the possible reduction potential of NOx and PM1 emissions by applying advanced air staging. Test runs with chipboard have been carried out with a 150kW pilot-scale furnace with moving grate technology. The influence of the air ratio in the primary combustion chamber, the temperature in the primary combustion chamber, the residence time in the primary combustion chamber, the type of the flue gas recirculation and the boiler load on NOx and PM1 emissions have been evaluated. The results showed that the NOx emissions are mainly influenced by the air ratio in the primary combustion chamber. An optimum can be observed at an air ratio between 0.9 and 1.0. Furthermore, NOx emissions decrease with decreasing temperature and increasing residence time in the primary combustion chamber. In addition, also the temperature in the primary combustion chamber and the type of flue gas recirculation seems to have a certain effect on NOx emissions. Regarding PM1 emissions, the following two influencing parameters are of most relevance: the volume flow of the gas through the fuel bed (cooling effect) and the temperature in the primary combustion chamber. Additional test runs with wood chips and short rotation coppice to evaluate possible influences of different fuels are foreseen.
Keywords:
combustion, NOx emission, particle emission, pilot plant, air staging, primary measures
Topic:
Biomass Conversion Technologies for Heating, Electricity and Chemicals
Subtopic:
Emissions and emission control
Event:
19th European Biomass Conference and Exhibition
Session:
OA4.2
Pages:
874 - 879
ISBN-13:
978-88-89407-55-4
ISBN-10:
88-89407-55-7
Paper DOI:
10.5071/19thEUBCE2011-OA4.2
Price:
FREE
