华电技术 ›› 2020, Vol. 42 ›› Issue (1): 78-80.

• 技术交流 • 上一篇    

1000MW二次再热机组给水温度优化实施

  

  1. 国家能源集团泰州发电有限公司,泰州江苏〓225327
  • 出版日期:2020-01-25 发布日期:2020-03-20

Optimization of feedwater temperature of 1000MW double reheat units

  1. China Energy Group Taizhou Power Generation Company Limited, Taizhou 225327, China
  • Online:2020-01-25 Published:2020-03-20

摘要: 提高给水温度是提高机组运行循环热效率的重要手段。以某电厂1000MW二次再热机组为例,通过全开 #1高压加热器进汽调节阀及其旁路电动阀可提高各负荷段的给水温度 ,同时提高低负荷段脱硝装置入口的烟气温度。该运行调节不仅提升了机组运行的经济性,还有利于降低脱硝装置投运的负荷下限。

关键词: 给水温度, 经济性, 高压加热器, 进汽调节阀, 旁路电动阀, 部分负荷运行

Abstract: Increasing feedwater temperature is an important means to improve the thermal efficiency of unit operation cycle. Taking a 1000MW double reheat unit in a power plant as an example, by fully opening the steam admission control valve and bypass electric valve for the No.1 high pressure heater, the feedwater temperature at each load increased, and so did the flue gas temperature at denitrification device inlet. This operation mode can not only improve the economy of the unit, but also reduce the lower load limit of the denitration device.

Key words: feedwater temperature, economy; high pressure heater, steam admission control valve, bypass electric valve, partial load mode operation