| 摘要 |
A burner ( 16, 116, 216 ) of a surface-mixing type receives a carbonaceous fuel, for example, an acetylene-based fuel, from a fuel line ( 20 ) and an oxidant, such as relatively pure oxygen, from an oxidant line ( 18 ), the oxidant being supplied to the burner at a rate insufficient to result in complete combustion of the fuel, to thereby produced a sooty flame that is useful in applying lubricating soot particles to a molten glass contacting surface of a glass manufacturing machine. The burner, which is intermittently operated by a solenoid valve ( 38 ) in the oxidant line and by a solenoid valve ( 40 ) in the fuel line, has a fuel inlet passage ( 60 ) that extends along a longitudinal central axis of a tip element ( 56 ) of the burner, and an annular inlet passage ( 64 ) that surrounds the fuel inlet passage. The fuel inlet passage, which is otherwise closed at its downstream end, terminates in a multiplicity of separate passages ( 62 ) that are arranged in an annular array and through which fuel exits from a burner tip in an annular pattern on an interior of oxidant exiting from the burner in an annular pattern through a passage ( 66 ) in an annulus between the tip element and a cap element ( 58 ) of the burner. The burner serves to ensure rapid mixing of the fuel and 20 oxidant streams downstream of the burner, to thereby rapidly form an ignitable mixture that can be ignited by a spark igniter ( 54 ). Two-way solenoid valves ( 38, 40 ) are provided in the oxidant and fuel lines, respectively, to permit the burner to be operated intermittently.
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