关键词: 超临界汽轮机, 深度滑参数停机, 调节级后金属温度, 温降速度

Abstract:

The feasibility that turbine-driven feed pump is used for the deep sliding parameter shutdown of supercritical steam turbine equipped with 100% turbine-driven feed pump is discussed, as well as the characteristics, operation and safety measures of deep sliding parameter shutdown are investigated. The results show that the deep sliding parameter shutdown is feasible, in which the descent speed of steam temperature, metal temperature, differential expansion and thermal expansion are uniform, and the bearing vibration is safe and controllable. The deep sliding parameter shutdown can reduce barring time by 4 days, save auxiliary power by 17.3×104 kW·h, and increase power generation by 10×104 kW·h

Key words: supercritical steam turbine, deep sliding parameter shutdown, metal temperature after control stage, temperature dropping speed