Title:
Investigation of Non-woody Biomass Pellets Combustion in a Domestic Underfeed Boiler
Author(s):
Li, J., Chaney, J., Liu, H.
Document(s):
Paper
Poster
Abstract:
Non-woody crops are important biomass resources for carbon dioxide neutral energy. However, due to low ash melting point and high ash content of many non-woody biomass, there are challenges caused by ash sintering. The aim of this work was to examine the possibility of using these pellets in a domestic underfeed boiler (50kW) and monitor their emissions behaviour. Two types of non-woody biomass pellets and one woody biomass pellets were used in the tests: straw, miscanthus and wood. Emissions (CO, NOx) and flue gas compositions (O2, CO2) were continuously monitored from the flue gas of the chimney. The results showed emissions for non-woody pellets to be at a similar level to woody pellets for the first hour. However, after this time period ash sintering caused the CO emissions to increase to over 4000ppmv. In order to overcome the sintering problems two approaches were investigated (1) the use of limestone as an additive; (2) blending class A woody and non-woody miscanthus pellets (50% by volume). The results indicated the sintering problems can be reduced by blending non-woody with high quality woody pellets, but a longer term solution was found to be the use of appropriate additives.
Keywords:
emissions, additives, domestic boiler, non-woody biomass
Topic:
R&D on Biomass Conversion Technologies for Heating, Electricity and Chemicals
Subtopic:
Solid biofuel combustion for small and medium scale applications
Event:
21st European Biomass Conference and Exhibition
Session:
2DV.3.26
Pages:
1151 - 1155
ISBN:
978-88-89407-53-0
Paper DOI:
10.5071/21stEUBCE2013-2DV.3.26
Price:
FREE
