(19)
(11) EP 1 826 485 A3

(12) EUROPEAN PATENT APPLICATION

(88) Date of publication A3:
15.08.2012 Bulletin 2012/33

(43) Date of publication A2:
29.08.2007 Bulletin 2007/35

(21) Application number: 07001009.5

(22) Date of filing: 18.01.2007
(51) International Patent Classification (IPC): 
F23D 14/20(2006.01)
 F23D 14/70(2006.01)
(84) Designated Contracting States:
AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IS IT LI LT LU LV MC NL PL PT RO SE SI SK TR
Designated Extension States:
AL BA HR MK RS

(30) Priority: 28.02.2006 JP 2006051469

(71) Applicant: HITACHI, LTD.
Chiyoda-ku Tokyo 100-8280 (JP)

(72) Inventors:
  • Saitou, Takeo c/o Hitachi Ltd. Intellectual
    1-6-1 Marunouchi Chiyoda-ku Tokyo 100-8220 (JP)
  • Miura, Keisuke c/o Hitachi Ltd. Intellectual
    1-6-1 Marunouchi Chiyoda-ku Tokyo 100-8220 (JP)
  • Murota, Tomoya c/o Hitachi Ltd. Intellectual
    1-6-1 Marunouchi Chiyoda-ku Tokyo 100-8220 (JP)
  • Koyama, Kazuhito c/o Hitachi Ltd. Intellectual
    1-6-1 Marunouchi Chiyoda-ku Tokyo 100-8220 (JP)
  • Inoue, Hiroshi c/o Hitachi Ltd. Intellectual
    1-6-1 Marunouchi Chiyoda-ku Tokyo 100-8220 (JP)

(74) Representative: MERH-IP Matias Erny Reichl Hoffmann 
Paul-Heyse-Strasse 29
80336 München
80336 München (DE)

   


(54) Burner, method of combustion with the burner, and method of modifying the burner


(57) The present invention provides a burner that includes fuel nozzles (183) each for jetting out a fuel (21) and air holes (171) each for jetting out air (11), and are constructed so that each of the fuel nozzles (183) is coaxially disposed with the associated one of the air holes (171) to cause each of the fuel nozzles to jet out the fuel into the associated one of the air holes; the burner further having means (1) for disturbing a flow of the fuel (21) or a flow of the air (11) at an upstream position from a nozzle tip (184) disposed to jet out the fuel from the fuel nozzle.
According to the present invention, mixing of the fuel and air existing before both fluids are supplied to a combustion chamber (190) can be promoted for further suppressed NOx emissions.







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