Foliage and Grass as Fuel Pellets–Small Scale Combustion of Washed and Mechanically Leached BiomassReport as inadecuate




Foliage and Grass as Fuel Pellets–Small Scale Combustion of Washed and Mechanically Leached Biomass - Download this document for free, or read online. Document in PDF available to download.

1

Deutsches Biomasseforschungszentrum gemeinnützige GmbH DBFZ-German Biomass Research Center, Leipzig 04347, Germany

2

florafuel AG, München 81829, Germany





*

Author to whom correspondence should be addressed.



Academic Editor: Animesh Dutta

Abstract The high contents of disadvantageous elements contained in non-woody biomass are known to cause problems during small and large scale combustion, typically resulting in a higher risk of slagging, corrosion, and increased emissions. Mechanically leaching the respective elements from the biomass through a sequence of process steps has proven to be a promising solution.The florafuel process used here is comprised of size reduction followed by washing and subsequent mechanical dewatering of the biomass. Densification of the upgraded biomass into standardized pellets Ø 6mm enables an application in existing small-scale boilers. The presented combustion trials investigated the performance of pellets made from leached grass, foliage and a mixture of both in two small-scale boilers <100 kWth with slightly different technology moving grate versus water-cooled burner tube during a 4-h measurement period. Emissions were in accordance with German emissions standards except for NOx threshold is 0.50 g-m3 in the case of pure grass pellets 0.51 g-m3 and particulate matter PM in all but one case foliage, 13–16 mg-m3. An electrostatic precipitator ESP unit installed with one of the boilers successfully reduced PM emission of both the grass and mixture fuel below the threshold of 20 mg-m3 all emission values refer to 13 vol.% O2, at standard temperature and pressure STP. Bottom ash composition and grate temperature profiles were analyzed and discussed for one of the boilers. View Full-Text

Keywords: solid biofuel; residue biomass; combustion; mechanical leaching; emission reduction solid biofuel; residue biomass; combustion; mechanical leaching; emission reduction





Author: Jan Hari Arti Khalsa 1,* , Frank Döhling 1 and Florian Berger 2

Source: http://mdpi.com/



DOWNLOAD PDF




Related documents