COMBUSTION DEVICE

WIPO Patent Application WO/2018/155102

A1

The purpose of the invention is to inhibit ash and the like floating in a furnace from adhering above and below an opening that discharges after-air into a furnace. A boiler (10A) comprises a furnace (11), a burner that burns a fuel with less than the theoretically required amount of air, and an after-air supply unit that supplies after-air to the furnace (11) for burning the fuel in an unburned state after burning in the burner. The after-air supply unit comprises: a first nozzle (32) that discharges the after-air so as to go straight toward the interior of the furnace (11); a second nozzle that deflects the after-air discharged toward the interior of the furnace (11) in a direction away from the first nozzle (32) to both the left and right sides in the horizontal direction; an expanding diameter face (16) that gradually increases in diameter toward the interior of the furnace (11) and that is continuous with a front wall (15f) or a rear wall (15r) of a furnace wall (15); and a guidance member (40A) by which a portion of the after-air discharged from the interior of a casing (31) to the inside of the furnace (11) flows along the expanding diameter face (16).

MINE TOSHIHIKO (JP)
KIYAMA KENJI (JP)
KURAMASHI KOJI (JP)
BABA AKIRA (JP)
OCHI KENICHI (JP)
KITAKAZE KOSUKE (JP)
ONISHI YASUHITO (JP)

PCT/JP2018/002966

August 30, 2018

January 30, 2018

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MITSUBISHI HITACHI POWER SYS (JP)

F23L9/02; F23C6/04

WO2015005350A1	2015-01-15
WO2007105335A1	2007-09-20
WO2017126240A1	2017-07-27

JPH09112816A	1997-05-02
JP2008075911A	2008-04-03
JP2005273973A	2005-10-06

FUJITA, Takaharu (JP)

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