Effect of burner settings on flame stability during the combustion of coal-water slurry fuel
- Prairie View A and M Univ., TX (United States). Mechanical Engineering Dept.
Combustion tests were conducted to determine the range of secondary air swirl required to maintain a stable combustion flame. Results obtained during the flame stability testing show no significant effect of swirl settings on NOx, SO{sub 2} and CO{sub 2} for three combustion tests (834,330 Btu/hr, 669,488 Btu/hr and 508, 215 Btu/hr). At each of the two higher firing rates, combustion was relatively complete regardless of swirl settings, therefore, burner settings may be adjusted to provide a visually stable flame without concern for higher carbon in ash as a function of burner settings. The parameters affecting flame stability are mainly coal particle size, volatile matter, ash content and excess air. Tests conducted at three different locations (Top, Middle and Bottom) revealed that the gaseous concentrations such as NOx, SO{sub 2} and CO{sub 2} were a function of residence time for each of the firing rates.
- Sponsoring Organization:
- USDOE Pittsburgh Energy Technology Center, PA (United States)
- DOE Contract Number:
- FG22-94PC94122
- OSTI ID:
- 489026
- Report Number(s):
- CONF-970146--; ISBN 1-890277-04-5
- Country of Publication:
- United States
- Language:
- English
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