Mixing and gasification of coal in entrained flow systems. Quarterly technical progress report No. 6, 1 July 1978--30 September 1978
Technical Report
·
OSTI ID:6172945
This report summarizes a two-year study to investigate the mixing and gasification of coal in entrained flow systems. This is the second phase of a study initiated in November 1974. Thirty-two cold-flow tests were completed in the atmospheric test facility using 30/sup 0/ non-parallel secondary injection. Thirteen of these tests were with pulverized coal rather than silicon powder. The latter tests indicate a different effect of mixing chamber diameter than that found using silicon powder. This is being checked further. Design of a seondary jet swirl generator for the cold-flow-facility was also initiated. Eighteen atmospheric cold-flow tests were conducted in the high pressure gasifier to evaluate the instrument systems. It was found that longer probes are needed to allow sampling at a crucial intermediate axial position not now obtainable. Thirty-five reacting gasification tests were also completed. The prototype probe and sample train were proven operational. A full set of five probes and sample trains was constructed, installed and evaluated. Calibration of the steam flow system was initiated. The one-dimensional gasification/combustion model was applied to a Babcock and Wilcox staged combustor. Parametric studies have been conducted to evaluate the effect of gasifier operating variables and controlling rate processes in entrained flow gasifiers. The PDF formulation of diffusion-limited, gas-phase turbulent combustion has been completed and tested. The code, now functional for gaseous fuel, was applied to clean natural gas/air combustion in the BYU Rate Resolution Combustor. It has been applied to cold-flow mixing systems at BYU.
- Research Organization:
- Brigham Young Univ., Provo, UT (USA). Dept. of Chemical Engineering
- OSTI ID:
- 6172945
- Report Number(s):
- TID-28953
- Country of Publication:
- United States
- Language:
- English
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