| 摘要 |
A combustor (50) for generating hot gas in order to rotate a turbine can burn fuel with a high vanadium content without emitting appreciable vanadium pentoxide. This is accomplished by burning fuel in a rich fuel/air environment in a primary combustion zone (60), cooling the hot gases and unburned fuel in a quenching zone (62), and then burning the previously unburned fuel in a secondary combustion zone (64). In the primary combustion zone (60), most of the vanadium present in the fuel forms vanadium trioxide or vanadium tetroxide rather than vanadium pentoxide. In the quenching zone (62), cooling of hot gas quickly removes most of the remaining vanadium pentoxide by transforming it to vanadium trioxide or vanadium tetroxide, which forms a fine dust which is swept along with hot gas and thus fouls neither the combustor nor the turbine. |
