Title:
SOLID FUEL BURNER AND METHOD FOR OPERATING COMBUSTION DEVICE PROVIDED WITH SOLID FUEL BURNER
Document Type and Number:
WIPO Patent Application WO/2014/027611
Kind Code:
A1
Abstract:
A pulverized coal nozzle (8) is formed to have a portion in which the cross sectional shape perpendicular to the central axis (C) of the outer peripheral wall thereof monotonously spreads in a horizontal direction up to the vicinity of an opening (32) in a furnace wall surface (18) and gradually increases the flatness degree thereof, and have a flattened shape at the opening (18), a secondary air nozzle (10) is formed to have a flattened cross sectional shape perpendicular to the central axis (C) thereof at the outlet on the furnace side thereof, and a tertiary air nozzle (15) is formed to have a circular cross sectional shape perpendicular to the central axis (C) of the nozzle at the opening (32) and be divided into two parts by a partition plate (14) in order to form a plurality of parallel flow paths therein, and is formed such that a guide plate (16) is provided in a tertiary air flow path (5) in the tertiary air nozzle (15) in order to increase the flow rate in the vertical direction of combustion air jetted from the tertiary air nozzle (15) to a furnace (11). By increasing the momentum deviation in the vertical direction even under a low load condition where the air flow rate is low and stably deflecting a flame, the NOx concentration can be reduced.
Inventors:
WAKAMATSU HITOSHI (JP)
KIYAMA KENJI (JP)
SHIMOGORI MIKI (JP)
MINE TOSHIHIKO (JP)
TADAKUMA SATOSHI (JP)
OHYATSU NORIYUKI (JP)
OCHI KENICHI (JP)
KURAMASHI KOJI (JP)
OCHI YUSUKE (JP)
OKAZAKI HIROFUMI (JP)
KIYAMA KENJI (JP)
SHIMOGORI MIKI (JP)
MINE TOSHIHIKO (JP)
TADAKUMA SATOSHI (JP)
OHYATSU NORIYUKI (JP)
OCHI KENICHI (JP)
KURAMASHI KOJI (JP)
OCHI YUSUKE (JP)
OKAZAKI HIROFUMI (JP)
Application Number:
PCT/JP2013/071595
Publication Date:
February 20, 2014
Filing Date:
August 09, 2013
Export Citation:
Assignee:
BABCOCK HITACHI KK (JP)
International Classes:
F23D1/00; F23C99/00; F23L9/06; F23N3/06
Domestic Patent References:
| WO2009125566A1 | 2009-10-15 | |||
| WO2012098848A1 | 2012-07-26 |
Foreign References:
| JP4896143B2 | 2012-03-14 |
Attorney, Agent or Firm:
MATSUNAGA, Takayoshi et al. (JP)
Takayoshi Matsunaga (JP)
Takayoshi Matsunaga (JP)
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