F - Mech Eng,Light,Heat,Weapons – 23 – D
Patent
F - Mech Eng,Light,Heat,Weapons
23
D
110/15
F23D 1/00 (2006.01) F23C 6/04 (2006.01)
Patent
CA 1172912
ABSTRACT OF THE DISCLOSURE: A method for operating a coal dust furnace with reduced formation of nitrogen oxides, comprising the steps of: blowing into the furnace a first mixture of air and coal dust; blowing into the furnace a first stream of com- bustion air surrounding the first mixture; blowing into the furnace a second mixture of air and coal dust surrounding the first stream of combustion air; and blowing into the furnace a second stream of combustion air surrounding the second mixture. The coal dust of one of said mixtures com- prises combustion coal dust whose range of grain sizes has an upper limiting grain size, the coal dust of the other mixture being temperature-reducing coal dust whose range of grain sizes lies essentially above the upper limiting grain size of the combustion coal dust. And, burning the temperature-reducing coal dust in an afterburning area of the furnace. And a furnace in which this method is carried out.
373838
Robic Robic & Associes/associates
Steag Aktiengesellschaft
LandOfFree
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