Title:
PULVERIZED COAL BURNER AND USING METHOD THEREFOR
Document Type and Number:
Japanese Patent JP3140299
Kind Code:
B2
Abstract:
PURPOSE: To provide a pulverized coal burner in which NOx concentration at the time of a low load can be reduced.
CONSTITUTION: A secondary air nozzle 103 and a tertiary air nozzle 104 are provided on the outer periphery of a fuel nozzle 102 for conveying pulverized coal with the primary air. Two swirling flow generators 113, 114 are provided at least at one of the nozzles at the positional relationship parallel to the flow of the air. The swirling flows of the two generators can be so set that the one is stronger. The air can be supplied only from the one generator under the condition in which the air flow rate is low. Thus, since the swirling strength of the combustion air can be enhanced, NOx concentration generated by the combustion of the coal can be reduced. Since the swirling strength at the time of low load can be raised, pulverized coal flame is stably held thereby to reduce the concentration.
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Inventors:
Hironobu Kobayashi
Kiyoshi Narato
Masayuki Taniguchi
Go Kawano
Hirofumi Okazaki
Shigeki Morita
Shunichi Tsumura
Kiyoshi Narato
Masayuki Taniguchi
Go Kawano
Hirofumi Okazaki
Shigeki Morita
Shunichi Tsumura
Application Number:
JP14897194A
Publication Date:
March 05, 2001
Filing Date:
June 30, 1994
Export Citation:
Assignee:
株式会社日立製作所
バブコック日立株式会社
バブコック日立株式会社
International Classes:
F23C7/00; F23D1/00; F23D1/02; F23D17/00; F23C99/00; (IPC1-7): F23C11/00; F23C11/00; F23D1/02
Domestic Patent References:
| JP5231617A | ||||
| JP4268103A | ||||
| JP62134406A | ||||
| JP60162108A | ||||
| JP62148840U | ||||
| JP6234636U |
Attorney, Agent or Firm:
Yasuo Sakuta