Bed material agglomeration during fluidized bed combustion. Technical progress report, January 1, 1995--March 31, 1995

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Experiments performed support the hypothesis that a reducing atmosphere during fluidized bed coal combustion contributes to the formation of agglomerates. Reducing conditions are imposed by controlling the amount of combustion air supplied to the combustor, 50% of theoretical in these experiments. These localized reducing conditions may arise from either poor lateral bed mixing or oxygen-starved conditions due to the coal feed locations. Deviations from steady-state operating conditions in bed pressure drop may be used to detect agglomerate formation. Interpretation of the bed pressure drop was made more straightforward by employing a moving average difference method. During steady-state operation, the difference ... continued below

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65 p.

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Brown, R.C.; Dawson, M.R. & Smeenk, J.L. April 1, 1995.

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Description

Experiments performed support the hypothesis that a reducing atmosphere during fluidized bed coal combustion contributes to the formation of agglomerates. Reducing conditions are imposed by controlling the amount of combustion air supplied to the combustor, 50% of theoretical in these experiments. These localized reducing conditions may arise from either poor lateral bed mixing or oxygen-starved conditions due to the coal feed locations. Deviations from steady-state operating conditions in bed pressure drop may be used to detect agglomerate formation. Interpretation of the bed pressure drop was made more straightforward by employing a moving average difference method. During steady-state operation, the difference between the moving point averages should be close to zero, within {plus_minus}0.03 inches of water. Instability within the combustor, experienced once agglomerates begin to form, can be recognized as larger deviations from zero, on the magnitude of {plus_minus}0.15 inches of water.

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65 p.

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OSTI as DE95015958

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  • Other Information: PBD: Apr 1995

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  • Other: DE95015958
  • Report No.: DOE/PC/92530--T11
  • Grant Number: FG22-92PC92530
  • DOI: 10.2172/94017 | External Link
  • Office of Scientific & Technical Information Report Number: 94017
  • Archival Resource Key: ark:/67531/metadc792027

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  • April 1, 1995

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  • Dec. 19, 2015, 7:14 p.m.

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  • Jan. 9, 2018, 9:54 a.m.

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Brown, R.C.; Dawson, M.R. & Smeenk, J.L. Bed material agglomeration during fluidized bed combustion. Technical progress report, January 1, 1995--March 31, 1995, report, April 1, 1995; Ames, Iowa. (digital.library.unt.edu/ark:/67531/metadc792027/: accessed May 26, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.