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Title: Composite tube cracking in kraft recovery boilers: A state-of-the-art review

Abstract

Beginning in the mid-1960s, increasing energy costs in Finland and Sweden made energy recovery more critical to the cost-effective operation of a kraft pulp mill. Boiler designers responded to this need by raising the steam operating pressure, but almost immediately the wall tubes in these new boilers began to corrode rapidly. Test panels installed in the walls of the most severely corroding boiler identified austenitic stainless steel as sufficiently resistant to the new corrosive conditions, and discussions with Sandvik AB, a Swedish tube manufacturer, led to the suggestion that coextruded tubes be used for water wall service in kraft recovery boilers. Replacement of carbon steel by coextruded tubes has solved most of the corrosion problems experienced by carbon steel wall tubes, however, these tubes have not been problem-free. Beginning in early 1995, a multidisciplinary research program funded by the US Department of Energy was established to investigate the cause of cracking in coextruded tubes and to develop improved materials for use in water walls and floors of kraft recovery boilers. One portion of that program, a state-of-the-art review of public- and private-domain documents related to coextruded tube cracking in kraft recovery boilers is reported here. Sources of information that weremore » consulted for this review include the following: tube manufacturers, boiler manufacturers, public-domain literature, companies operating kraft recovery boilers, consultants and failure analysis laboratories, and failure analyses conducted specifically for this project. Much of the information contained in this report involves cracking problems experienced in recovery boiler floors and those aspects of spout and air-port-opening cracking not readily attributable to thermal fatigue. 61 refs.« less

Authors:
;  [1]; ;  [2]
  1. Pulp and Paper Research Inst. of Canada, Vancouver, British Columbia (Canada)
  2. Oak Ridge National Lab., TN (United States)
Publication Date:
Research Org.:
Oak Ridge National Lab., TN (United States); Pulp and Paper Research Inst. of Canada, Vancouver, BC (Canada)
Sponsoring Org.:
USDOE Assistant Secretary for Energy Efficiency and Renewable Energy, Washington, DC (United States)
OSTI Identifier:
631170
Report Number(s):
ORNL/TM-13442
ON: DE98003766; TRN: AHC29813%%41
DOE Contract Number:  
AC05-96OR22464
Resource Type:
Technical Report
Resource Relation:
Other Information: PBD: Jul 1997
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; 32 ENERGY CONSERVATION, CONSUMPTION, AND UTILIZATION; PAPER INDUSTRY; WATERWALL INCINERATORS; CORROSION RESISTANT ALLOYS; CRACK PROPAGATION; STAINLESS STEEL-304; CARBON STEELS; INCOLOY 825; MECHANICAL PROPERTIES

Citation Formats

Singbeil, D.L., Prescott, R., Keiser, J.R., and Swindeman, R.W. Composite tube cracking in kraft recovery boilers: A state-of-the-art review. United States: N. p., 1997. Web. doi:10.2172/631170.
Singbeil, D.L., Prescott, R., Keiser, J.R., & Swindeman, R.W. Composite tube cracking in kraft recovery boilers: A state-of-the-art review. United States. doi:10.2172/631170.
Singbeil, D.L., Prescott, R., Keiser, J.R., and Swindeman, R.W. Tue . "Composite tube cracking in kraft recovery boilers: A state-of-the-art review". United States. doi:10.2172/631170. https://www.osti.gov/servlets/purl/631170.
@article{osti_631170,
title = {Composite tube cracking in kraft recovery boilers: A state-of-the-art review},
author = {Singbeil, D.L. and Prescott, R. and Keiser, J.R. and Swindeman, R.W.},
abstractNote = {Beginning in the mid-1960s, increasing energy costs in Finland and Sweden made energy recovery more critical to the cost-effective operation of a kraft pulp mill. Boiler designers responded to this need by raising the steam operating pressure, but almost immediately the wall tubes in these new boilers began to corrode rapidly. Test panels installed in the walls of the most severely corroding boiler identified austenitic stainless steel as sufficiently resistant to the new corrosive conditions, and discussions with Sandvik AB, a Swedish tube manufacturer, led to the suggestion that coextruded tubes be used for water wall service in kraft recovery boilers. Replacement of carbon steel by coextruded tubes has solved most of the corrosion problems experienced by carbon steel wall tubes, however, these tubes have not been problem-free. Beginning in early 1995, a multidisciplinary research program funded by the US Department of Energy was established to investigate the cause of cracking in coextruded tubes and to develop improved materials for use in water walls and floors of kraft recovery boilers. One portion of that program, a state-of-the-art review of public- and private-domain documents related to coextruded tube cracking in kraft recovery boilers is reported here. Sources of information that were consulted for this review include the following: tube manufacturers, boiler manufacturers, public-domain literature, companies operating kraft recovery boilers, consultants and failure analysis laboratories, and failure analyses conducted specifically for this project. Much of the information contained in this report involves cracking problems experienced in recovery boiler floors and those aspects of spout and air-port-opening cracking not readily attributable to thermal fatigue. 61 refs.},
doi = {10.2172/631170},
journal = {},
number = ,
volume = ,
place = {United States},
year = {Tue Jul 01 00:00:00 EDT 1997},
month = {Tue Jul 01 00:00:00 EDT 1997}
}

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