US 9,810,425 B2
Pulverized coal burner for oxyfuel combustion boiler
Shuuhei Terushita, Tokyo (JP); Toshihiko Yamada, Tokyo (JP); Shuzo Watanabe, Tokyo (JP); and Terutoshi Uchida, Tokyo (JP)
Assigned to IHI Corporation, Tokyo (JP); and ELECTRIC POWER DEVELOPMENT CO., LTD., Tokyo (JP)
Appl. No. 12/920,694
Filed by Shuuhei Terushita, Tokyo (JP); Toshihiko Yamada, Tokyo (JP); Shuzo Watanabe, Tokyo (JP); and Terutoshi Uchida, Tokyo (JP)
PCT Filed Mar. 6, 2008, PCT No. PCT/JP2008/000476
§ 371(c)(1), (2), (4) Date Nov. 8, 2010,
PCT Pub. No. WO2009/110038, PCT Pub. Date Sep. 11, 2009.
Prior Publication US 2011/0126780 A1, Jun. 2, 2011
Int. Cl. F22B 31/00 (2006.01); F23D 1/00 (2006.01); F23L 7/00 (2006.01)
CPC F23D 1/00 (2013.01) [F23L 7/007 (2013.01); F23D 2201/10 (2013.01); F23D 2900/00006 (2013.01); F23L 2900/07005 (2013.01); Y02E 20/344 (2013.01)] 7 Claims
OG exemplary drawing
 
1. A pulverized coal burner for an oxyfuel combustion boiler comprising:
burner inner and outer cylinders which penetrate a wind box and come close to a throat portion;
a pulverized coal feed passage provided between the burner inner and outer cylinders; and
a plurality of oxygen injection means positioned outwardly from the burner outer cylinder, penetrating the wind box and coming close to the throat portion for directly feeding oxygen ahead of the burner outer cylinder,
wherein a tip of the burner outer cylinder is disposed inside of the oxygen injection means and directly adjacent to a tip of the oxygen injection means, the tip of the burner outer cylinder being an outlet surface of the burner outer cylinder perpendicular to a central axis of the burner outer cylinder, the tip of the oxygen injection means being an outlet surface of the oxygen injection means perpendicular to the central axis of the burner outer cylinder, and
wherein each of the oxygen injection means includes the tip on an injection side disposed behind the tip of the burner outer cylinder to prevent injected oxygen from hitting the tip of the burner outer cylinder and to prevent flame from the tip of the burner outer cylinder from hitting the tip of the oxygen injection means.