Materials for fluidized bed heat exchangers

Pasi Makkonen, Martti Mäkipää

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

3 Citations (Scopus)

Abstract

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
Pages197-207
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

NameVTT Symposium
PublisherVTT
Number233
ISSN (Print)0357-9387
ISSN (Electronic)1455-0873

Conference

ConferenceBALTICA VI - Life Management and Maintenance for Power Plants
CountryFinland
CityHelsinki-Stockholm
Period8/06/0410/06/04

Fingerprint

Fluidized beds
Heat exchangers
Erosion
Superheater tubes
Sprayed coatings
Heat generation
Combustors
Boilers
Heat flux
Steam
Corrosion

Keywords

  • fluidized beds

Cite this

Makkonen, P., & Mäkipää, M. (2004). Materials for fluidized bed heat exchangers. In BALTICA VI - Life management and maintenance for power plants. Vol. 1 (pp. 197-207). Espoo: VTT Technical Research Centre of Finland. VTT Symposium, No. 233
Makkonen, Pasi ; Mäkipää, Martti. / Materials for fluidized bed heat exchangers. BALTICA VI - Life management and maintenance for power plants. Vol. 1. Espoo : VTT Technical Research Centre of Finland, 2004. pp. 197-207 (VTT Symposium; No. 233).
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Makkonen, P & Mäkipää, M 2004, Materials for fluidized bed heat exchangers. in BALTICA VI - Life management and maintenance for power plants. Vol. 1. VTT Technical Research Centre of Finland, Espoo, VTT Symposium, no. 233, pp. 197-207, BALTICA VI - Life Management and Maintenance for Power Plants, Helsinki-Stockholm, Finland, 8/06/04.

Materials for fluidized bed heat exchangers. / Makkonen, Pasi; Mäkipää, Martti.

BALTICA VI - Life management and maintenance for power plants. Vol. 1. Espoo : VTT Technical Research Centre of Finland, 2004. p. 197-207 (VTT Symposium; No. 233).

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

TY - GEN

T1 - Materials for fluidized bed heat exchangers

AU - Makkonen, Pasi

AU - Mäkipää, Martti

PY - 2004

Y1 - 2004

N2 - 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.

AB - 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.

KW - fluidized beds

M3 - Conference article in proceedings

SN - 951-38-6291-7

T3 - VTT Symposium

SP - 197

EP - 207

BT - BALTICA VI - Life management and maintenance for power plants. Vol. 1

PB - VTT Technical Research Centre of Finland

CY - Espoo

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Makkonen P, Mäkipää M. Materials for fluidized bed heat exchangers. In BALTICA VI - Life management and maintenance for power plants. Vol. 1. Espoo: VTT Technical Research Centre of Finland. 2004. p. 197-207. (VTT Symposium; No. 233).