High temperature corrosion of boiler waterwalls induced by chlorides and bromides

Part 1: Occurrence of the corrosive ash forming elements in a fluidised bed boiler co-firing solid recovered fuel

Pasi Vainikka (Corresponding Author), D. Bankiewicz, A. Frantsi, J. Silvennoinen, J. Hannula, P. Yrjas, M. Hupa

Research output: Contribution to journalArticleScientificpeer-review

35 Citations (Scopus)

Abstract

In waste fired boilers high temperature corrosion has often been attributed to zinc and lead chlorides. In addition, bromine induced high temperature corrosion has been earlier observed in a bubbling fluidised bed (BFB) boiler co-firing solid recovered fuel (SRF) with bark and wastewater sludge. In Part 1 of this work a measurement campaign was undertaken to determine the occurrence of Cl, Br, Zn and Pb in the fuel, in the combustion gases as well as in the deposits on the boiler waterwalls. It was observed that Cl, Br, Zn and Pb originate to a large extent from the SRF, they are vaporised in the furnace, and may form waterwall deposits. This, complemented by fluctuations between oxidising and reducing atmosphere resulted in rapid corrosion of the waterwall tubes. Concentrations of Cl, Br, Zn and Pb in the fuel, in the furnace vapours and in the deposits are reported in this work. As there is lack of published data on the bromine induced high temperature corrosion, laboratory scale corrosion tests were carried out to determine the relative corrosiveness of chlorine and bromine and these results will be reported in Part 2 of this work. Furthermore, the forms of Cl, Br, Zn and Pb in the combustion gases as well as in the waterwall deposits were estimated by means of thermodynamic equilibrium modelling and these results will also be discussed in Part 2.
Original languageEnglish
Pages (from-to)2055-2063
Number of pages9
JournalFuel
Volume90
Issue number5
DOIs
Publication statusPublished - 2011
MoE publication typeA1 Journal article-refereed

Fingerprint

Ashes
Boiler firing
Caustics
Bromides
Boilers
Chlorides
Bromine
Corrosion
Deposits
Furnaces
Temperature
Gases
Chlorine
Wastewater
Zinc
Lead
Vapors
Thermodynamics

Keywords

  • Solid recovered fuel
  • Bromine
  • Chlorine
  • Corrosion
  • Fine particle

Cite this

Vainikka, Pasi ; Bankiewicz, D. ; Frantsi, A. ; Silvennoinen, J. ; Hannula, J. ; Yrjas, P. ; Hupa, M. / High temperature corrosion of boiler waterwalls induced by chlorides and bromides : Part 1: Occurrence of the corrosive ash forming elements in a fluidised bed boiler co-firing solid recovered fuel. In: Fuel. 2011 ; Vol. 90, No. 5. pp. 2055-2063.
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abstract = "In waste fired boilers high temperature corrosion has often been attributed to zinc and lead chlorides. In addition, bromine induced high temperature corrosion has been earlier observed in a bubbling fluidised bed (BFB) boiler co-firing solid recovered fuel (SRF) with bark and wastewater sludge. In Part 1 of this work a measurement campaign was undertaken to determine the occurrence of Cl, Br, Zn and Pb in the fuel, in the combustion gases as well as in the deposits on the boiler waterwalls. It was observed that Cl, Br, Zn and Pb originate to a large extent from the SRF, they are vaporised in the furnace, and may form waterwall deposits. This, complemented by fluctuations between oxidising and reducing atmosphere resulted in rapid corrosion of the waterwall tubes. Concentrations of Cl, Br, Zn and Pb in the fuel, in the furnace vapours and in the deposits are reported in this work. As there is lack of published data on the bromine induced high temperature corrosion, laboratory scale corrosion tests were carried out to determine the relative corrosiveness of chlorine and bromine and these results will be reported in Part 2 of this work. Furthermore, the forms of Cl, Br, Zn and Pb in the combustion gases as well as in the waterwall deposits were estimated by means of thermodynamic equilibrium modelling and these results will also be discussed in Part 2.",
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High temperature corrosion of boiler waterwalls induced by chlorides and bromides : Part 1: Occurrence of the corrosive ash forming elements in a fluidised bed boiler co-firing solid recovered fuel. / Vainikka, Pasi (Corresponding Author); Bankiewicz, D.; Frantsi, A.; Silvennoinen, J.; Hannula, J.; Yrjas, P.; Hupa, M.

In: Fuel, Vol. 90, No. 5, 2011, p. 2055-2063.

Research output: Contribution to journalArticleScientificpeer-review

TY - JOUR

T1 - High temperature corrosion of boiler waterwalls induced by chlorides and bromides

T2 - Part 1: Occurrence of the corrosive ash forming elements in a fluidised bed boiler co-firing solid recovered fuel

AU - Vainikka, Pasi

AU - Bankiewicz, D.

AU - Frantsi, A.

AU - Silvennoinen, J.

AU - Hannula, J.

AU - Yrjas, P.

AU - Hupa, M.

PY - 2011

Y1 - 2011

N2 - In waste fired boilers high temperature corrosion has often been attributed to zinc and lead chlorides. In addition, bromine induced high temperature corrosion has been earlier observed in a bubbling fluidised bed (BFB) boiler co-firing solid recovered fuel (SRF) with bark and wastewater sludge. In Part 1 of this work a measurement campaign was undertaken to determine the occurrence of Cl, Br, Zn and Pb in the fuel, in the combustion gases as well as in the deposits on the boiler waterwalls. It was observed that Cl, Br, Zn and Pb originate to a large extent from the SRF, they are vaporised in the furnace, and may form waterwall deposits. This, complemented by fluctuations between oxidising and reducing atmosphere resulted in rapid corrosion of the waterwall tubes. Concentrations of Cl, Br, Zn and Pb in the fuel, in the furnace vapours and in the deposits are reported in this work. As there is lack of published data on the bromine induced high temperature corrosion, laboratory scale corrosion tests were carried out to determine the relative corrosiveness of chlorine and bromine and these results will be reported in Part 2 of this work. Furthermore, the forms of Cl, Br, Zn and Pb in the combustion gases as well as in the waterwall deposits were estimated by means of thermodynamic equilibrium modelling and these results will also be discussed in Part 2.

AB - In waste fired boilers high temperature corrosion has often been attributed to zinc and lead chlorides. In addition, bromine induced high temperature corrosion has been earlier observed in a bubbling fluidised bed (BFB) boiler co-firing solid recovered fuel (SRF) with bark and wastewater sludge. In Part 1 of this work a measurement campaign was undertaken to determine the occurrence of Cl, Br, Zn and Pb in the fuel, in the combustion gases as well as in the deposits on the boiler waterwalls. It was observed that Cl, Br, Zn and Pb originate to a large extent from the SRF, they are vaporised in the furnace, and may form waterwall deposits. This, complemented by fluctuations between oxidising and reducing atmosphere resulted in rapid corrosion of the waterwall tubes. Concentrations of Cl, Br, Zn and Pb in the fuel, in the furnace vapours and in the deposits are reported in this work. As there is lack of published data on the bromine induced high temperature corrosion, laboratory scale corrosion tests were carried out to determine the relative corrosiveness of chlorine and bromine and these results will be reported in Part 2 of this work. Furthermore, the forms of Cl, Br, Zn and Pb in the combustion gases as well as in the waterwall deposits were estimated by means of thermodynamic equilibrium modelling and these results will also be discussed in Part 2.

KW - Solid recovered fuel

KW - Bromine

KW - Chlorine

KW - Corrosion

KW - Fine particle

U2 - 10.1016/j.fuel.2011.01.020

DO - 10.1016/j.fuel.2011.01.020

M3 - Article

VL - 90

SP - 2055

EP - 2063

JO - Fuel

JF - Fuel

SN - 0016-2361

IS - 5

ER -