Materials for fluidized bed heat exchangers

Pasi Makkonen, Martti Mäkipää

Research output: Chapter in Book/Report/Conference proceedingConference article in proceedingsScientific

3 Citations (Scopus)


In order to increase the steam parameters in combustion units, several new approaches have been proposed. New materials have been tested, but they seldom have been a sufficient solution. Metallic coatings sprayed on superheater tubes have been noted to reduce erosion and corrosion in selected cases. New plant designs have been tested. However, most of these solutions have at least one special feature, which prevents using them as a general solution applicable to all new boiler units. Fluidised bed combustion units, and especially circulating fluidised bed (CFB) combustors have gained reputation as one of the most feasible means of solid fuel combustion. These units have one major benefit over other technologies: possibility to utilise the re-circulated solids for heat generation. This allows using fluidised bed heat exchangers (FBHE), which are one of the most promising novel solutions to improve the efficiency of solid fuel combustion units. Selecting optimal materials for such heat exchangers is not straightforward due to several special demands, such as high heat flux and continuous erosion.
Original languageEnglish
Title of host publicationBALTICA VI - Life management and maintenance for power plants. Vol. 1
Place of PublicationEspoo
PublisherVTT Technical Research Centre of Finland
ISBN (Electronic)951-38-6292-5
ISBN (Print)951-38-6291-7
Publication statusPublished - 2004
MoE publication typeB3 Non-refereed article in conference proceedings
EventBALTICA VI - Life Management and Maintenance for Power Plants - Helsinki-Stockholm, Finland
Duration: 8 Jun 200410 Jun 2004

Publication series

SeriesVTT Symposium


ConferenceBALTICA VI - Life Management and Maintenance for Power Plants


  • fluidized beds


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