Claims
- 1. An improved coal burner for the reduction of NO.sub.x emissions from furnaces that are fired with pulverized coal, said coal burner comprising:
- (a) a primary air/coal pipe;
- (b) a diffuser positioned where said primary air/coal pipe discharges a mixture of air and coal into a furnace; and
- (c) a plurality of fuel splitters defining a plurality of partially open areas and a plurality of blocked areas of said diffuser such that said plurality of fuel splitters divide said mixture of air and coal into a plurality of streams passing through said plurality of partially open areas into said furnace for combustion under initially fuel rich conditions, wherein each of said plurality of fuel splitters contains a bypass conduit that allows a portion of said mixture of air and coal to pass from a leading edge of said fuel splitter into said furnace without passing through said diffuser.
- 2. The invention of claim 1, wherein said bypass conduit has a triangular shaped cross-sectional area.
- 3. The invention of claim 1, wherein said bypass conduit is formed by a radial split in said leading edge.
- 4. A method for reducing the NO.sub.x in a pulverized coal-fired furnace comprising the steps of:
- (a) placing a diffuser where a primary-air/coal pipe discharges a mixture of air and coal into a furnace;
- (b) positioning a plurality of fuel splitters to define a plurality of partially open areas and a plurality of blocked areas of said diffuser; and
- (c) dividing said mixture of air and coal into a plurality of streams of air and coal to pass through said plurality of partially open areas into said furnace for combustion under initially fuel rich conditions; and
- (d) directing a portion of said mixture of air and coal through the interior of said fuel splitters such that it bypasses said diffusers and enters said furnace.
CROSS-REFERENCE TO RELATED APPLICATION
This application is a continuation-in-part of U.S. application Ser. No. 08/359,800, filed on Dec. 20, 1994 now U.S. Pat. No. 5,568,777.
US Referenced Citations (12)
Foreign Referenced Citations (4)
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0073305 |
May 1992 |
JPX |
1079948 |
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Continuation in Parts (1)
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Number |
Date |
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Parent |
359800 |
Dec 1994 |
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