Solid circulation around a jet in a fluidized-bed gasifier. Final report

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The main purpose of the study was the analysis of particle circulation in the jet region of a fluidized bed gasifier. The two fundamental questions answered by this report relate to the measurement of particle velocities in the grid region and to the relevance of the jet zone to the operation of the reactor. Particle velocities were measured at corresponding points within a jet in the two-dimensional bed, using the optical fiber probe and a Laser Doppler Velocimeter (LDV). The probe measurements compare well with the LDV results in the main jet region. Particle velocities were also measured with the ... continued below

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Pages: 45

Creation Information

Caram, H.S. & Patrose, B. April 1, 1981.

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Description

The main purpose of the study was the analysis of particle circulation in the jet region of a fluidized bed gasifier. The two fundamental questions answered by this report relate to the measurement of particle velocities in the grid region and to the relevance of the jet zone to the operation of the reactor. Particle velocities were measured at corresponding points within a jet in the two-dimensional bed, using the optical fiber probe and a Laser Doppler Velocimeter (LDV). The probe measurements compare well with the LDV results in the main jet region. Particle velocities were also measured with the probe in the dense phase region of the fluidized bed where measurements were not possible using LDV. The resulting flow maps clearly indicate solids circulation patterns around jets and identify dead zones formed on the distributor plate. The entering gas jet was modeled assuming that the dense phase is entrained into the gas stream. The solid particles are then conveyed upwards along the jet penetration distance. Typical conditions for a fluidized bed combustor were used and the model includes the reactions between carbon and carbon dioxide and oxygen and the homogeneous oxidation of carbon monoxide. The results indicate that considerable reaction occurs in the gas jets entering the reactor and that they should be considered in any careful analysis of its operation.

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Pages: 45

Notes

NTIS, PC A03/MF A01.

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  • Report No.: DOE/ET/13384-T2
  • Grant Number: FG01-78ET13384
  • DOI: 10.2172/6308151 | External Link
  • Office of Scientific & Technical Information Report Number: 6308151
  • Archival Resource Key: ark:/67531/metadc1204028

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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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Creation Date

  • April 1, 1981

Added to The UNT Digital Library

  • July 5, 2018, 11:11 p.m.

Description Last Updated

  • Oct. 26, 2018, 1:15 p.m.

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Caram, H.S. & Patrose, B. Solid circulation around a jet in a fluidized-bed gasifier. Final report, report, April 1, 1981; United States. (digital.library.unt.edu/ark:/67531/metadc1204028/: accessed December 16, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.