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两级除氧器热力系统研究

Research on Thermal System with Double-deaerator

    摘要
  • 摘要:
      目的  为了研究大容量机组宽负荷控制技术，对两级除氧器热力系统进行了研究。
      方法  经过对比论证，对其系统、布置、技术经济性做了分析。
      结果  研究表明：两级除氧器热力系统在技术上是可行的，以百万机组为例，在不同工况下，双机回热两级除氧器热力系统的热耗相比双机回热一级除氧系统平均低10 kJ/kWh~50 kJ/kWh，节省标煤7 232 t/a，投资增加约570万，投资回收年限约2年。
      结论  该系统适用于高参数机组，研究结果可为后续高参数机组采用两级除氧器热力系统提供依据。

     

    Abstract:
      Introduction  The paper performs research on thermal system with double-deaerator in order to study the wide load technology of large capccity units.
      Method  By using the comparative study，analyzed the system， plant layout and technique economics.
      Result  The results show that the system is feasible in technology，for 1 000 MW unit，the heat rate of the double-turbine regeneration system with double-deaerator is lower 10 kJ/kWh~50 kJ/kWh than the double-turbine regeneration system with one-deaerator under different loads，saved 7 232 tons of coal per year，investment increased by 5.7 million yuan， the investment recovery period is about 2 years.
      Conclusion  The system is suitable for high parameter units，this work provides some guidance for using the thermal system with double-deaerator in high parameter units.

     

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