Selecting the right material for recovery boiler superheaters

Esa K. Vakkilainen, Pekka Pohjanne

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

Abstract

The aim of this paper is to examine the selection of superheater materials for recovery boilers. Fireside wastage in recovery boilers is mainly caused by formation of corrosive deposits, typically with aggressive molten alkali phases. Fireside corrosion can also be caused by gaseous components and is then usually associated with a reducing atmosphere. This active oxidation can affect superheater tubes even at temperatures lower than the first melting temperature. There is a wide array of available superheater materials to choose from and a few newer materials to be considered. The operating conditions and deposit properties must be looked at when material selection is done. The material choice has a significant effect to the cost of the recovery boiler, as the selection of the final superheater material can change the price by a factor of 10.
Original languageEnglish
Title of host publicationBaltica VIII
Subtitle of host publicationLife Management and Maintenance for Power Plants
Place of PublicationEspoo
PublisherVTT Technical Research Centre of Finland
Pages37-51
Volume2
ISBN (Electronic)978-951-38-7594-7
ISBN (Print)978-951-38-7593-2
Publication statusPublished - 2010
MoE publication typeB3 Non-refereed article in conference proceedings
EventBALTICA VIII - International Conference on Life Management and Maintenance for Power Plants - Helsinki-Stockholm, Finland
Duration: 18 May 201020 May 2010

Publication series

NameVTT Symposium
PublisherVTT
Number265
ISSN (Print)0357–9387
ISSN (Electronic)1455–0873

Conference

ConferenceBALTICA VIII - International Conference on Life Management and Maintenance for Power Plants
CountryFinland
CityHelsinki-Stockholm
Period18/05/1020/05/10

Fingerprint

Superheaters
Boilers
Recovery
Deposits
Superheater tubes
Melting point
Molten materials
Corrosion
Oxidation
Costs

Cite this

Vakkilainen, E. K., & Pohjanne, P. (2010). Selecting the right material for recovery boiler superheaters. In Baltica VIII: Life Management and Maintenance for Power Plants (Vol. 2, pp. 37-51). Espoo: VTT Technical Research Centre of Finland. VTT Symposium, No. 265
Vakkilainen, Esa K. ; Pohjanne, Pekka. / Selecting the right material for recovery boiler superheaters. Baltica VIII: Life Management and Maintenance for Power Plants. Vol. 2 Espoo : VTT Technical Research Centre of Finland, 2010. pp. 37-51 (VTT Symposium; No. 265).
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Vakkilainen, EK & Pohjanne, P 2010, Selecting the right material for recovery boiler superheaters. in Baltica VIII: Life Management and Maintenance for Power Plants. vol. 2, VTT Technical Research Centre of Finland, Espoo, VTT Symposium, no. 265, pp. 37-51, BALTICA VIII - International Conference on Life Management and Maintenance for Power Plants, Helsinki-Stockholm, Finland, 18/05/10.

Selecting the right material for recovery boiler superheaters. / Vakkilainen, Esa K.; Pohjanne, Pekka.

Baltica VIII: Life Management and Maintenance for Power Plants. Vol. 2 Espoo : VTT Technical Research Centre of Finland, 2010. p. 37-51 (VTT Symposium; No. 265).

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

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AU - Pohjanne, Pekka

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N2 - The aim of this paper is to examine the selection of superheater materials for recovery boilers. Fireside wastage in recovery boilers is mainly caused by formation of corrosive deposits, typically with aggressive molten alkali phases. Fireside corrosion can also be caused by gaseous components and is then usually associated with a reducing atmosphere. This active oxidation can affect superheater tubes even at temperatures lower than the first melting temperature. There is a wide array of available superheater materials to choose from and a few newer materials to be considered. The operating conditions and deposit properties must be looked at when material selection is done. The material choice has a significant effect to the cost of the recovery boiler, as the selection of the final superheater material can change the price by a factor of 10.

AB - The aim of this paper is to examine the selection of superheater materials for recovery boilers. Fireside wastage in recovery boilers is mainly caused by formation of corrosive deposits, typically with aggressive molten alkali phases. Fireside corrosion can also be caused by gaseous components and is then usually associated with a reducing atmosphere. This active oxidation can affect superheater tubes even at temperatures lower than the first melting temperature. There is a wide array of available superheater materials to choose from and a few newer materials to be considered. The operating conditions and deposit properties must be looked at when material selection is done. The material choice has a significant effect to the cost of the recovery boiler, as the selection of the final superheater material can change the price by a factor of 10.

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SN - 978-951-38-7593-2

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Vakkilainen EK, Pohjanne P. Selecting the right material for recovery boiler superheaters. In Baltica VIII: Life Management and Maintenance for Power Plants. Vol. 2. Espoo: VTT Technical Research Centre of Finland. 2010. p. 37-51. (VTT Symposium; No. 265).