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    • 5. 发明授权
    • Nozzle for use in a geothermal steam turbine and method for preventing
adhesion of scale thereto
    • 用于地热汽轮机的喷嘴及其防止附着垢的方法
    • US5399067A
    • 1995-03-21
    • US225000
    • 1994-04-06
    • Kouichi Yoshida
    • Kouichi Yoshida
    • F01D9/02F01D5/28F01D5/18
    • F01D5/28
    • A nozzle for use in a geothermal steam turbine is adapted to prevent precipitation and adhesion of scale onto the surface of the nozzle. A coolant water passageway is provided in an initial stage nozzle of a geothermal steam turbine. An inlet side passageway of this coolant water passageway is communicated with coolant water inlet passageways provided in inner and outer turbine casings, respectively. Also, an outlet side passageway is communicated with coolant water outlet passageways. Due to this construction, coolant water is made to pass through the coolant water passageway within the nozzle from a coolant water feed source to lower the surface temperature of the nozzle, and thereby reevaporation and condensation of drain on the blade surface are prevented to prevent precipitation of scale.
    • 用于地热蒸汽轮机的喷嘴适于防止水垢沉淀并附着在喷嘴表面上。 冷却水通道设置在地热蒸汽轮机的初级喷嘴中。 该冷却剂水通道的入口侧通道分别与设置在内涡轮机壳体和外涡轮机壳体中的冷却水入口通道连通。 此外,出口侧通道与冷却水出口通道连通。 由于这种结构,使冷却水从冷却水供给源通过喷嘴内的冷却剂水通道,以降低喷嘴的表面温度,从而避免蒸发并且防止在叶片表面上的排水冷凝以防止沉淀 的规模。