BARRIER ISSUES TO THE UTILIZATION OF BIOMASS

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Description

The Energy & Environmental Research Center (EERC) is conducting a project to examine the fundamental issues limiting the use of biomass in small industrial steam/power systems in order to increase the future use of this valuable domestic resource. Specifically, the EERC is attempting to elucidate the ash-related problems--grate clinkering and heat exchange surface fouling--associated with cofiring coal and biomass in grate-fired systems. Utilization of biomass in stoker boilers designed for coal can be a cause of concern for boiler operators. Boilers that were designed for low-volatile fuels with lower reactivities can experience damaging fouling when switched to higher-volatile and more ... continued below

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59 pages

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Gunderson, Jay R.; Folkedahl, Bruce C.; Schmidt, Darren D.; Weber, Greg F. & Zygarlicke, Christopher J. May 1, 2002.

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Description

The Energy & Environmental Research Center (EERC) is conducting a project to examine the fundamental issues limiting the use of biomass in small industrial steam/power systems in order to increase the future use of this valuable domestic resource. Specifically, the EERC is attempting to elucidate the ash-related problems--grate clinkering and heat exchange surface fouling--associated with cofiring coal and biomass in grate-fired systems. Utilization of biomass in stoker boilers designed for coal can be a cause of concern for boiler operators. Boilers that were designed for low-volatile fuels with lower reactivities can experience damaging fouling when switched to higher-volatile and more reactive lower-rank fuels, such as when cofiring biomass. Higher heat release rates at the grate can cause more clinkering or slagging at the grate because of higher temperatures. Combustion and loss of volatile matter can start too early with biomass fuels compared to design fuel, vaporizing alkali and chlorides which then condense on rear walls and heat exchange tube banks in the convective pass of the boiler, causing noticeable increases in fouling. In addition, stoker-fired boilers that switch to biomass blends may encounter new chemical species such as potassium sulfates and various chlorides in combination with different flue gas temperatures because of changes in fuel heating value, which can adversely affect ash deposition behavior.

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59 pages

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OSTI as DE00795768

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  • Other Information: PBD: 1 May 2002

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  • Report No.: FC26-00NT41014--03
  • Grant Number: FC26-00NT41014
  • DOI: 10.2172/795768 | External Link
  • Office of Scientific & Technical Information Report Number: 795768
  • Archival Resource Key: ark:/67531/metadc741779

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  • May 1, 2002

Added to The UNT Digital Library

  • Oct. 19, 2015, 7:39 p.m.

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  • March 30, 2016, 12:13 p.m.

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Gunderson, Jay R.; Folkedahl, Bruce C.; Schmidt, Darren D.; Weber, Greg F. & Zygarlicke, Christopher J. BARRIER ISSUES TO THE UTILIZATION OF BIOMASS, report, May 1, 2002; Pittsburgh, Pennsylvania. (digital.library.unt.edu/ark:/67531/metadc741779/: accessed August 19, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.