Pulverized coal combustion burner

Details Pulverized coal combustion burner Pulverized coal combustion burner

1995-03-17

1997-11-11

Bennett, Henry A.

Furnaces

Including fluid fuel burner

Powdered solid fuel

110264, 110265, 110104B, F23C 110

Patent

active

056852428

ABSTRACT:
A pulverized coal combustion burner includes a pulverized coal nozzle, and secondary and tertiary air nozzles provided in concentric relation to the pulverized coal nozzle. A flame stabilizing ring is provided at an outlet end of the pulverized coal nozzle. A separation wall is provided within the pulverized coal nozzle to divide a passage in this nozzle into two passages. A pulverized coal/air mixture flows straight through the two passages, so that recirculation flows of the pulverized coal/air mixture are formed in proximity to the outlet end of the pulverized coal nozzle. As a result, the ignitability of the pulverized coal, as well as a combustion rate, is enhanced, thereby reducing the amount of discharge of NOx.

REFERENCES:
patent: 4412810 (1983-11-01), Izuha aet al.
patent: 4807541 (1989-02-01), Masai et al.
patent: 5090339 (1992-02-01), Okiura et al.
patent: 5199355 (1993-04-01), Larue
Patent Abstracts of Japan, vol. 015, No. 489 (m-1189) 11 Dec. 1991.
Patent Abstracts of Japan, vol. 015, No. 303 (M-1142) 2 Aug. 1991.
Patent Abstracts of Japan, vol. 009, No. 117 (M-381), 22 May 1985.
Patent Abstracts of Japan, vol. 009, No. 111 (M-379), 15 May 1985.

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