Alkali deposits found in biomass boilers: The behavior of inorganic material in biomass-fired power boilers -- Field and laboratory experiences. Volume 2

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This report documents the major findings of the Alkali Deposits Investigation, a collaborative effort to understand the causes of unmanageable ash deposits in biomass-fired electric power boilers. Volume 1 of this report provide an overview of the project, with selected highlights. This volume provides more detail and discussion of the data and implications. This document includes six sections. The first, the introduction, provides the motivation, context, and focus for the investigation. The remaining sections discuss fuel properties, bench-scale combustion tests, a framework for considering ash deposition processes, pilot-scale tests of biomass fuels, and field tests in commercially operating biomass power ... continued below

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496 p.

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Baxter, L.L.; Miles, T.R.; Miles, T.R. Jr.; Jenkins, B.M.; Dayton, D.C.; Milne, T.A. et al. March 1, 1996.

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Description

This report documents the major findings of the Alkali Deposits Investigation, a collaborative effort to understand the causes of unmanageable ash deposits in biomass-fired electric power boilers. Volume 1 of this report provide an overview of the project, with selected highlights. This volume provides more detail and discussion of the data and implications. This document includes six sections. The first, the introduction, provides the motivation, context, and focus for the investigation. The remaining sections discuss fuel properties, bench-scale combustion tests, a framework for considering ash deposition processes, pilot-scale tests of biomass fuels, and field tests in commercially operating biomass power generation stations. Detailed chemical analyses of eleven biomass fuels representing a broad cross-section of commercially available fuels reveal their properties that relate to ash deposition tendencies. The fuels fall into three broad categories: (1) straws and grasses (herbaceous materials); (2) pits, shells, hulls and other agricultural byproducts of a generally ligneous nature; and (3) woods and waste fuels of commercial interest. This report presents a systematic and reasonably detailed analysis of fuel property, operating condition, and boiler design issues that dictate ash deposit formation and property development. The span of investigations from bench-top experiments to commercial operation and observations including both practical illustrations and theoretical background provide a self-consistent and reasonably robust basis to understand the qualitative nature of ash deposit formation in biomass boilers. While there remain many quantitative details to be pursued, this project encapsulates essentially all of the conceptual aspects of the issue. It provides a basis for understanding and potentially resolving the technical and environmental issues associated with ash deposition during biomass combustion. 81 refs., 124 figs., 76 tabs.

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496 p.

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OSTI as DE96007898

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  • Other Information: PBD: Mar 1996

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  • Other: DE96007898
  • Report No.: NREL/TP--433-8142-Vol.2
  • Report No.: SAND--96-8225-Vol.2
  • Grant Number: AC36-83CH10093
  • DOI: 10.2172/251289 | External Link
  • Office of Scientific & Technical Information Report Number: 251289
  • Archival Resource Key: ark:/67531/metadc664180

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  • March 1, 1996

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  • June 29, 2015, 9:42 p.m.

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  • March 31, 2016, 6:04 p.m.

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Baxter, L.L.; Miles, T.R.; Miles, T.R. Jr.; Jenkins, B.M.; Dayton, D.C.; Milne, T.A. et al. Alkali deposits found in biomass boilers: The behavior of inorganic material in biomass-fired power boilers -- Field and laboratory experiences. Volume 2, report, March 1, 1996; Golden, Colorado. (digital.library.unt.edu/ark:/67531/metadc664180/: accessed December 14, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.