To ensure a small size and low NOx, and provide a duct burner without the need of an expensive heat resistant steel plate.
A duct burner is adapted such that it includes a fuel gas header 11 equipped with a plurality of fuel gas injection holes 12, two flame insulation members 14, 14 which is fixed to an opposite position of the fuel gas header at its base end 15a and is expanded from the base end to an exhaust gas downstream side, and which has a plurality of waste gas introduction holes 16 disposed from the base end to a tip end free end portion 15b, and side plates 17 for closing opposite side ends of the flame insulation member, and further which is installed in a waste gas duct. In the duct burner, a gas introduction hole with a maximum hole diameter is disposed at a longitudinal center of the flame insulation member, and the fuel gas injection holes in the fuel gas header is located more frontally than the waste gas introduction holes arranged at a first line of the flame insulation member on the base end side of the same, and further exhaust gas is supplied such that an air ratio from the base end of the flame insulation member and the waste gas introduction holes at the center ranges from 1.0 to 1.6.
JP2828164 | RANGE BURNER |
JP2004225966 | STRUCTURE OF COMBUSTION FACILITY AND GAS TURBINE COGENERATION SYSTEM |
OGURA YOSHIHIRO
TANAKA YASURO
OSAKA GAS CO LTD