Improving thermocouple service life in slagging gasifiers

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The measurement of temperature within slagging gasifiers for long periods of time is difficult/impossible because of sensor failure or blockage of inputs used to monitor gasifier temperature. One of the most common means of temperature measurement in a gasifier is physically, through the use of thermocouples in a gasifier sidewall. These units can fail during startup, standby, or during the first 40-90 days of gasifier service. Failure can be caused by a number of issues; including thermocouple design, construction, placement in the gasifier, gasifier operation, and molten slag attack of the materials used in a thermocouple assembly. Lack of temperature ... continued below

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Bennett, James P.; Kwong, Kyei-Sing; Powell, Cynthia A.; Thomas, Hugh & Krabbe, Rick January 1, 2005.

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Description

The measurement of temperature within slagging gasifiers for long periods of time is difficult/impossible because of sensor failure or blockage of inputs used to monitor gasifier temperature. One of the most common means of temperature measurement in a gasifier is physically, through the use of thermocouples in a gasifier sidewall. These units can fail during startup, standby, or during the first 40-90 days of gasifier service. Failure can be caused by a number of issues; including thermocouple design, construction, placement in the gasifier, gasifier operation, and molten slag attack of the materials used in a thermocouple assembly. Lack of temperature control in a gasifier can lead to improper preheating, slag buildup on gasifier sidewalls, slag attack of gasifier refractories used to line a gasifier, or changes in desired gas output from a gasifier. A general outline of thermocouple failure issues and attempts by the Albany Research Center to improve the service life of thermocouples will be discussed.

Notes

Publisher -- 22nd Annual International Pittsburgh Coal Conference CD-ROM Proceedings, ISBN 1-890977-22-5, PCC 2005, session 45, paper 3, PDF file #190, 12 pp

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  • 22nd Annual International Pittsburgh Coal Conference, Pittsburgh, PA, Sept. 12-15, 2005

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  • Report No.: DOE/ARC-2005-043
  • Grant Number: None
  • Office of Scientific & Technical Information Report Number: 895755
  • Archival Resource Key: ark:/67531/metadc885977

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Office of Scientific & Technical Information Technical Reports

Reports, articles and other documents harvested from the Office of Scientific and Technical Information.

Office of Scientific and Technical Information (OSTI) is the Department of Energy (DOE) office that collects, preserves, and disseminates DOE-sponsored research and development (R&D) results that are the outcomes of R&D projects or other funded activities at DOE labs and facilities nationwide and grantees at universities and other institutions.

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  • January 1, 2005

Added to The UNT Digital Library

  • Sept. 22, 2016, 2:13 a.m.

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  • Nov. 4, 2016, 2:03 p.m.

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Bennett, James P.; Kwong, Kyei-Sing; Powell, Cynthia A.; Thomas, Hugh & Krabbe, Rick. Improving thermocouple service life in slagging gasifiers, article, January 1, 2005; (digital.library.unt.edu/ark:/67531/metadc885977/: accessed July 22, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.