超超临界机组水汽质量控制研究

[目的]超超临界机组是国内发电主力机组,对水汽质量要求严格,文章提出水汽质量控制措施以防止热力系统产生结垢和腐蚀,保证机组安全经济运行.[方法]为控制超超临界机组水汽质量,应该选择恰当的除盐水生产工艺、可靠的凝结水精处理系统、采取给水加氧处理(OT)、设置合理的在线监测表计、选择合适的凝汽器管材及做好停炉保护.[结果]...

Research on Steam-Water Quality Control for Ultra-Supercritical Power Plant

  Introduction  The ultra-supercritical unit is the main power generation unit in China， which has strict requirements on water steam quality. In this paper， water steam quality control measures have been proposed to prevent scaling and corrosion of the thermal system and ensure safe and economic operation of the unit.  Method  To control the steam-water quality of ultra-supercritical units， proper demineralized water production process， reliable condensate polishing system， feedwater oxygenation treatment （OT）， reasonable on-line monitoring meter， appropriate condenser pipe and shutdown protection were selected.  Result  The above measures can effectively prevent scaling and corrosion of the thermal system and ensure the safe and economic operation of the unit.  Conclusion  The steam-water quality control of ultra-supercritical parameters units can refer to the Water Vapor Quality of Thermal Power Units and Steam Power Equipment （GB/T 12145—2016）， and it is recommended to control the Parameters according to the expected value.