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    • 7. 发明公开
    • Burner with uniform fuel/air premixing for low emissions combustion
    • Brenner mitgleichmässigerBrennstoff / Luft Vormischung zur emissionarmen Verbrennung
    • EP0936406A2
    • 1999-08-18
    • EP99300964.6
    • 1999-02-10
    • GENERAL ELECTRIC COMPANY
    • Battaglioli, John LuigiBenoit, Jeffrey ArthurBland, Robert JamesBechtel, William Theodore, IIBlack, Stephen HughDeleonardo, Guy WayneMeyer, Stefan MartinTuthill, Richard SterlingTaura, Joseph Charles
    • F23D14/02F23C7/00F23M9/02
    • F23C7/004F23C2900/07001F23D14/02F23D2206/10F23D2900/14021F23M9/02
    • A burner for use in a combustion system of a heavy-duty industrial gas turbine includes a fuel/air premixer having an air inlet (6), a fuel inlet (29), and an annular mixing passage (3). The fuel/air premixer mixes fuel and air into a uniform mixture for injection into a combustor reaction zone (5). The burner also includes an inlet flow conditioner (1) disposed at the air inlet of the fuel/air premixer for controlling a radial and circumferential distribution of incoming air. The pattern of perforations (11,12) in the inlet flow conditioner is designed such that a uniform air flow distribution is produced at the swirler inlet annulus in both the radial and circumference directions. The premixer includes a swozzle assembly (2) having a series of preferably air foil shaped turning vanes that impart swirl to the airflow entering via the inlet flow conditioner. Each air foil contains intemal fuel flow passages (21,22) that introduce natural gas fuel into the air stream via fuel metering holes that pass through the walls of the air foil shaped turning vanes. By injecting fuel in this manner, an aerodynamically clean flow field is maintained throughout the premixer. By injecting fuel via two separate passages, the fuel/air mixture strength distribution can be controlled in the radial direction to obtain optimum radial concentration profiles for control of emissions, lean blow outs, and combustion driven dynamic pressure activity as machine and combustor load are varied.
    • 用于重型工业燃气轮机的燃烧系统的燃烧器包括具有空气入口(6),燃料入口(29)和环形混合通道(3)的燃料/空气预混合器。 燃料/空气预混合器将燃料和空气混合成均匀的混合物以注入燃烧器反应区(5)。 燃烧器还包括设置在燃料/空气预混合器的空气入口处的入口流调节器(1),用于控制进入空气的径向和周向分布。 入口流动调节器中的穿孔(11,12)的图案被设计成使得在径向和圆周方向上的旋流器入口环上产生均匀的气流分布。 预混合器包括具有一系列优选为空气箔形的转动叶片的喷嘴组件(2),该旋转叶片对通过入口流动调节器进入的气流赋予漩涡。 每个空气箔包含内部燃料流动通道(21,22),其通过燃烧计量孔将空气燃料引入空气流中,所述燃料计量孔穿过所述空气箔形转动叶片的壁。 通过以这种方式喷射燃料,在整个预混合器中保持空气动力学清洁的流场。 通过两个独立的通道喷射燃料,燃料/空气混合物的强度分布可以在径向方向上控制,以获得最佳的径向浓度分布,用于控制排放,稀薄吹出和燃烧驱动的动态压力活动,因为机器和燃烧器负载变化 。