Wood cofiring experience in cyclone boilers
- Foster Wheeler Environmental Corp., Sacramento, CA (United States)
Wood waste has been cofired with coal in cyclone boilers at the Allen Fossil Plant of TVA, the King Station of Northern States Power Co., and other generating stations. This practice is sufficiently interesting that TVA plans long term testing of cofiring wood at Allen. This practice can be separate from, or combined with, cofiring tire-derived fuel (TDF) in cyclone boilers. Cofiring has been practiced with the wood waste being fed to the boilers simultaneously with the coal, and with the wood waste being introduced into the secondary air system of cyclone boilers, for separate feeding. The practice of cofiring wood waste with coal in cyclone boilers has been shown to reduce emissions of SO{sub 2} and NO{sub x}, while also reducing the cost of fuel in selected locations. Foster Wheeler Environmental Corporation has evaluated this practice both with engineering design studies and with field testing for the Electric Power Research Institute. This paper summarizes testing and experience in several locations, focusing upon the following issues: (1) the impact of cofiring on boiler performance and consequent airborne emissions, (2) the alternative designs to accomplish cofiring, and (3) the economics of cofiring under various conditions. The paper documents opportunities and constraints associated with firing waste fuels in cyclone boilers.
- OSTI ID:
- 126471
- Report Number(s):
- CONF-950402--
- Country of Publication:
- United States
- Language:
- English
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