| 摘要 |
In the operation of an enclosure such as a glass tank, heat is supplied by firing one or more burners of a kind in which air is initially employed to atomise the fuel. Oxygen-rich gas, typically substantially pure oxygen, is subsequently substituted for the air. This substitution is carried out without decreasing the flame length. Typically, on making the substitution, the rates of supply of atomising agent, and secondary air are reduced. A burner head with a central passage 32 for oil, and outer passages 30 for atomising gas, projects atomized fuel from an orifice 48. The cross section of a passage 44, and the orifice size, may be reduced when oxygen-rich gas is used. <IMAGE> |
