The linear VGA nozzle - a versatile tool for coal utilization
Conference
·
OSTI ID:45147
- VGA Nozzle Co., Manchester, NH (United States)
The newly available VGA nozzles provide significant improvements in a number of services and can advance the utilization of coal fuel in power plants and industrial processes. The nozzle designs for applications such as coal-water slurry combustion, flue gas cleaning, reburning and hot gas cooling, are described. VGA nozzles are patented as {open_quotes}Variable Gas Atomization,{close_quotes}. A conical configuration was first developed and successfully tested with heavy oil and coal-water mixture fuels at the Technical University of Nova Scotia. The test results showed the VGA nozzle to provide superior combustion characteristics at flow rates in excess of 1 gpm. The carbon burnout was complete, the total particulate emission was only 25% of that of competing nozzles, and there was a complete absence of wear of the nozzle tip and body components. A review is given of the 1980`s laboratory and field development/demonstration work and droplet particle size testing, previously reported at coal-slurry combustion and gas turbine conferences. Subsequently, a two phase S.B.I.R. (Small Business Innovative Research) program sponsored by DOE was recently completed by ADA Technologies, Inc., Englewood, CO, in which a production prototype linear VGA nozzle was developed for in-duct humidification of flue gases. As reported at the 1991 SO{sub 3} Control Symposium, December 3-6, Washington, DC, the nozzle achieves a 50% reduction in the energy consumption and lower capital, operating and maintenance costs. It is currently planned to market the linear VGA humidification nozzle as a cost-effective alternative to SO{sub 3} injection, for the conditioning of flue gas to achieve improved ESP performance.
- OSTI ID:
- 45147
- Report Number(s):
- CONF-930413--
- Country of Publication:
- United States
- Language:
- English
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