公开(公告)号：JPH08219445A

公开(公告)日：1996-08-30

申请号：JP29707995

申请日：1995-11-15

Applicant: ABB MANAGEMENT AG

Inventor： YOOZEFU BUROSUTOMAIAA

IPC: F23R3/06 ,  F23C6/04 ,  F23C7/06 ,  F23D17/00 ,  F23N1/02 ,  F23R3/28 ,  F23R3/30 ,  F23R3/34

Abstract: PROBLEM TO BE SOLVED: To reduce NOx dispersion product by a method wherein a primary burner acting as a premixing burner is operated at a lower limitation in stable operation and then both cooling air and additional fuel are fed into a flue gas flow passing through the pre-combustion region. SOLUTION: A primary burner 110 formed as a premixing burner for stabilizing a flame is operated at a lower limit stable operation. Then cooling air supplied from a restricting wall of a double-wall type combustion chamber for use in forming self-igniting type mixture material, and additional fuel are fed into a flue gas flow passing through a precombustion space 61. In order to attain this arrangement, the pre-mixing burner 110 is arranged at a head end of a combustion chamber 60, subsequently the precombustion space 61 is installed, and an accelerating space 71 for the flue gas is arranged in subsequent to the pre-igniting region 61. Then, the restricting wall of the double-wall type combustion chamber within the region of the accelerating space 70 is provided with a flow inlet 64, and the inlet port of at least one post-ignition region 62 is provided with an injection means 121 for injecting additional fuel.