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|Title: ||Effect of alternative fuel properties on NOx reduction|
|Authors: ||Axelsen, Ernst Petter|
|Issue Date: ||2002 |
|Abstract: ||Today we see a substantial increase in the use of alternative fuels in the cement industry. The prospect
of reduction in fuel costs and the environmental benefits of waste to energy conversion are the driving
forces. For several years Norcem have steadily increased their use of alternative fuels such as refuse
derived fuel (RDF), liquid hazardous waste (LHW), solid hazardous waste (SHW), animal meal (AM)
and waste oil (WO). Alternative fuels behave differently compared to e.g. coal during combustion,
which is a factor that may influence the clinker quality, kiln operation, energy consumption and
emissions. Scancem International ANS and Telemark University College has therefore initiated a
research program to provide a better basis for characterization and understanding of alternative fuels in
cement kilns. The study focus on the effect of alternative fuel properties on NOx reduction by advanced
reburning and reburning in conjunction with CO emission.
A laboratory circulating fluidized bed combustor (CFBC) is applied, in addition to full scale
experiments at kiln 6 Norcem Brevik. Furthermore, computational fluid dynamic (CFD) simulations
with the aid of Fluent ® on the flow regime of the precalciner at kiln 6 Norcem Brevik is performed.
This paper will summarize the findings including results from full-scale experiments with advanced
reburning, animal meal and solid hazardous waste as a reburning fuel and with comparable tests in the
|Document type: ||Conference paper|
|Appears in Collections:||Institutt for prosess-, energi- og miljøteknologi|
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