| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a thick and thin fuel combustion burner certainly achieving NOx reduction by certainly achieving stability in combustion of flame without deteriorating combustibility even if thick flame holes and thin flame holes are combined in a multiple manner. <P>SOLUTION: In sequence, a row of thick flame holes 33 is arranged in the center, rows of thin flame holes 34, 34 are arranged on both sides, and further rows of thick flame holes 35, 35 are arranged on both outer sides. A narrowed part 371 is formed in each of supply passages 37 supplying lean air-fuel mixture to the rows of the thin flame holes 34, 34, and leakage holes 42, 63 are formed in a downstream position in the immediate vicinity of the narrowed part. Some of rich air-fuel mixture supplied to the outer thick flame holes 35 and center thick flame holes 33 is leaked from the leakage holes 42, 63 to the side of the lean air-fuel mixture, and the lean air-fuel mixture mixed with the rich air-fuel mixture is supplied to the outward positions of the thin flame holes 34. On the contrary, the lean air-fuel mixture may be leaked to the side of the center thick flame holes 33. <P>COPYRIGHT: (C)2012,JPO&INPIT |
