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Reduction of nitrogen- and carbon-based pollutants through the use of urea solutions
专利权人:
FUEL TECH, INC.
发明人:
BOWERS, WAYNE E.
申请号:
US19870090417
公开号:
US4992249(A)
申请日:
1987.08.27
申请国别(地区):
美国
年份:
1991
代理人:
摘要:
Disclosed is a process for reducing nitrogen oxides in an effluent from the combustion of a carbonaceous fuel under oxygen-rich conditions which minimize the production of carbon-based pollutants. A dispersion of a dilute aqueous urea solution is injected into an effluent at a temperature above 2000 DEG F., and preferably above 2100 DEG F. The concentration of the urea in solution and the size of the droplets in the dispersion are selected to provide the reduction in nitrogen oxides. The solution will preferably contain at least 80% by weight solvent and contain droplets sized within the range of from 150 to 10,000 microns.
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