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      機組運行條件-中譯英
      來源:北京新語絲翻譯公司  編輯:xinyusi  發布日期:2013-06-13 15:02


      機組運行條件翻譯由新語絲北京翻譯公司資深譯員整理,如果您有更多的機械翻譯,可以隨時與我們的在線客服人員聯系.

      機組運行條件

      1.2.1機組運行負荷模式

      機組年運行小時數為7,600小時,年利用小時數6,000小時。

      負荷 年運行小時數 年利用小時數
      100%額定出力 2950 2950
      75%額定出力 2900 2175
      ≤50%額定出力 1750 875
      總計 7600 6000
       
      1.2.2機組負荷性質

      機組具有一定的調峰能力,其調峰范圍為40%~100%額定出力。機組應能滿足鍋爐負荷為30%BMCR及以上時,機組投入全部自動裝置、鍋爐不投油、全部燃煤的條件下長期安全穩定運行的要求。

      1.2.3啟動、并網和帶負荷

      機組應滿足冷態、溫態、熱態和極熱態等不同啟動方式下參數配合的要求。賣方應提供上述不同啟動方式下從啟動到并網到滿負荷的啟動曲線,曲線中應至少包括蒸汽溫度、壓力、流量等,特別是從鍋爐點火到汽機沖轉的時間,到同步并列

      的時間和負荷上升到滿負荷的時間,以供買方核算。

      1.2.4汽機旁路系統

      機組沒有汽機旁路系統,允許主蒸汽能繞過高壓缸,隨再熱冷段蒸汽管道再次進入鍋爐,也允許再熱器出口蒸汽繞過中壓缸而流入空冷凝汽器。旁路系統的主要功能是:

      1) 在冷態、溫態、熱態和極熱態下能啟動機組,在整個啟動過程中,能使汽機進口蒸汽壓力、溫度、流量穩步提高,滿足汽輪機的要求,從而縮短機組的啟動時間。

      2) 在啟動時,使蒸汽通過再熱器以保護再熱器不被干燒。

      3) 滿足空冷凝汽器冬季啟動及低負荷時的防凍要求。

      1.2.5給水泵配置

      每臺機組配置2臺50%BMCR容量的汽動給水泵,用于機組正常運行,另外還配置1臺帶液力偶合器的30%容量的電動調速給水泵,用于機組啟動及備用。

      1.2 Generator set operating conditions

      1.2.1 Operating load mode

      The annual operating hour of the generator set is 7,600 hours and the annual hour availability is 6,000 hours.

      Load Annual operating hour Annual hour availability
      100% of nominal output 2,950 2,950
      75% of nominal output 2,900 2,175
      ≤50% of nominal output 1,750 875
      Total 7,600 6,000

      1.2.2 Load nature

      The generator set features certain peaking capability, with peaking range between 40% and 100% of nominal output of the generator set. The generator set shall be able to operate safely and stably for long period when the boiler

      load is 30% of BMCR or above, all automatic devices are put into operation, no fuel is fed to the boiler or only coal is used.

      1.2.3 Startup, paralleling in, and loading on

      Parameters shall be appropriately configured on the generator units so that they may be started from cool, warm, hot, and extremely hot modes. The Seller shall furnish a startup curve from each of the above statuses until the units

      are paralleled in and loaded on. The curves shall include steam temperature, pressure, and flow, and etc. Especially, the durations from boiler ignition to engine startup, to paralleling in, and to the full load shall be included for the

      Buyer's calculation.

      1.2.4 Turbine bypass

      Turbine bypass shall be available for main steam bypassing the high pressure cylinder and returning to the boiler through the cold steam pipe of the re-heater, and for the steam from the re-heater outlet bypassing the mid cylinder

      and entering the condenser. Main function of the bypass is as follows:

      1) Enable turbine startup in cool, warm, hot, and extremely hot statuses. Steady increase of turbine inlet steam pressure, temperature, and flow shall be available to suit the turbine and accelerate the startup.

      2) Ensure steam flowing through and protect the re-heater during startup.

      3) Keep the condenser from being frozen during startup and light-load running in winter days.

      1.2.5 Feed pumps 

      Each generator unit shall be equipped with two steam-driven feed pumps 50%BMCR for each, which shall be used in normal operation of the unit. An additional electric governing feed pump (capacity: 30%) with hydrodynamic clutch

      shall be offered for unit startup and standby.

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