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On-line monitoring of agglomeration in fluidised bed boilers
RISE - Research Institutes of Sweden, Built Environment, Energy and Circular Economy.ORCID iD: 0000-0002-8019-7186
RISE - Research Institutes of Sweden, Built Environment, Energy and Circular Economy.
2018 (English)Report (Other academic)
Abstract [en]

Combustion in fluidized beds has several benefits, but a potential problem is bed agglomeration causing defluidisation. The most used counter measure is to regularly renew the bed material, inferring costs for new sand and deposition of spent material. For an adaptive optimization there is a need of a method which indicates when bed agglomeration is initializing, before it is too late to counteract.

In this project, the conductivity of fluidized beds has been measured by a novel in-situ probe. The probe has been tested in a fluidized bed of sand and ashes at temperatures up to 1000°C. In addition, the probe has been tested in a fluidized bed while burning different fuels.

The results show that the conductivity of the bed increases with temperature and concentration of ash. The conductivity varies strongly between different fuels. The signal from the probe reacts strongly to the onset of severe bed agglomeration, but it is hard to find any consistent tendencies that can be applied to predict it.

Place, publisher, year, edition, pages
Borås, 2018. , p. 23
Series
RISE Rapport ; 2018:68
Keywords [en]
Fluidised bed, Combustion, Agglomeration, Conductivity
National Category
Energy Engineering
Identifiers
URN: urn:nbn:se:ri:diva-39958ISBN: 978-91-88907-12-7 (print)OAI: oai:DiVA.org:ri-39958DiVA, id: diva2:1353850
Funder
ÅForsk (Ångpanneföreningen's Foundation for Research and Development), 17-364Available from: 2019-09-24 Created: 2019-09-24 Last updated: 2019-09-24Bibliographically approved

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CiteExportLink to record
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Citation style
  • apa
  • ieee
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  • Other style
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Output format
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