Title:
New Laboratory Methods for the Practical Assessment of Solid Fuel Characteristics in Large Furnaces
Author(s):
Wadenbäck, J., Berg, M., Padban, N., Zelkowski, J.
Document(s):
Paper
Abstract:
With more suitable and accurate methods for characterizing all solid fuels future problems in power plants may be avoided. The methods described here focuses on grindability¬, ignitability/burnout¬and sintering properties simulating conditions in full¬scale furnaces. Grindability properties are assessed with a laboratory mill. (1) A solid fuel is ground in the mill. (2) Resulting ground material is separated into a dust fraction with the required fineness, and a coarser fraction recirculated to the mill. (3) New solid fuel is added equivalent to the amount of dust produced. (4) The procedure is repeated until the amount of dust produced is constant. The properties are described with specific milling energy per amount of product of a particular particle size. Ignitability properties are assessed by calculating the ‘ignitability index (ZWZ)'. The ZWZ parameter can be interpreted as the ability of a solid fuel to maintain a stable strong flame. Sintering properties are assessed in the ash as a function of temperature and time. (1) Solid fuel ash is pressed to pellets. (2) The pellets are inserted into the sintering gradient oven. (3) After >17 hours the pellets are taken out from the oven and the density and strength of the pellets are determined.
Keywords:
co-firing, heat, power generation, solid biofuels, industry, characterisation
Topic:
Industrial Demonstration and Business Concepts
Subtopic:
Biofuels utilisation for power generation
Event:
20th European Biomass Conference and Exhibition
Session:
4AO.2.1
Pages:
1795 - 1800
ISBN:
978-88-89407-54-7
Paper DOI:
10.5071/20thEUBCE2012-4AO.2.1
Price:
FREE
