| 摘要 |
PURPOSE:To decrease NOx and reduce noise by laying out a combustion inner tube having a rich gas burner port on the top and a through hole on the lower side in the central part of a combustion tube having an upper opening and a mixing chamber, forming a venturi section in said mixing chamber on the upper part of the through hole, and installing a lean gas flame hole on the upper part of the mixing chamber. CONSTITUTION:A combustion inner tube 5 is installed in the central part of a combustion tube 1 having an opening and a mixing chamber on the upper part. A rich gas burner port 6 and a through hole 7 are installed to the combustion inner tube 5 where the gas is mixed with a primary air and a rich gas having a lower air excess ratio is arranged to flow while it is ejected from the rich gas burner port 6 for combustion. At the same time, the gas is arranged to be injected into the mixing chamber 4 from the through hole 7. In addition, a venturi section 8 is formed in the mixing chamber above the through hole 7 so that a secondary air flowing from a secondary air port 3 may be mixed with the mixed gas from the through hole 7, thereby turning the mixed gas into a lean gas and burning the lean gas at a lean gas burner port 9. |
