Agglomeration Detection in Circulating Fluidized Bed Boilers Using Refuse Derived Fuels
2016 (English)In: 2016 9th EUROSIM Congress on Modelling and Simulation, IEEE Computer Society, 2016, 123-128 p.Conference paper (Refereed)
The formation of agglomerates in a refuse derived fuel (RDF) fired circulating fluidized bed (CFB) boiler has been investigated by implementing a dynamic model of the combustion process. The nature of refuse derived fuel, which is complex in composition, leads to an increased tendency for agglomerate formation. Notwithstanding the fact that a robust control scheme is essential in preventing the decrease in boiler efficiency from accelerated agglomerate formation. Therefore, a mechanism for detecting agglomeration through a physical model by looking at the minimum fluidization is presented. As agglomerates form between the fuel ash and bed sand the average diameter of the sand will increase and therefore the minimum fluidization velocity. Samples of bed material have been sieved and measured from a 150MW circulating fluidized bed boiler fired with refuse derived fuel to determine bed material size distribution. The findings have been correlated and match an increase in the minimum fluidization velocity during a seven day sampling period where the bed material size distribution increases above the average sand diameter.
Place, publisher, year, edition, pages
IEEE Computer Society, 2016. 123-128 p.
Circulating fluidized bed, agglomeration, detection, RDF, Modelica
Research subject Energy- and Environmental Engineering
IdentifiersURN: urn:nbn:se:mdh:diva-33995ISBN: 978-1-5090-4119-0 (print)OAI: oai:DiVA.org:mdh-33995DiVA: diva2:1050126
2016 9th EUROSIM Congress on Modelling and Simulation, 12-16 September 2016, Oulu, Finland