摘要
以某1000 MW超超临界汽轮机为研究对象,分析了该机组的自然冷却过程并确定了该机组的自然冷却时间。采取炉侧引入空气的方法,设计了快速冷却方案。基于该设计方案,成功进行了1次汽轮机的快速冷却,验证了方案的可行性。结果表明,与自然冷却相比,此次快速冷却可以节约7天左右的停机冷却时间;同时,当采用炉侧引入空气的方案时,需要视再热管道中空气与中压转子的温度差来决定中压缸的快速冷却投入。
In this paper, the natural cooling process of a 1000 MW ultra-supercritical steam turbine is analyzed and its natural cooling time is determined. A rapid cooling scheme, which inhales air from the boiler, is designed. Based on the scheme, the rapid cooling of the steam turbine is successfully carried out, verifying the feasibility of the scheme. The results show that the rapid cooling can save a time of about 7 days compared with the natural cooling; meanwhile, to adopt the scheme of inhaling air from the boiler,the difference between the air temperature and the IP rotor temperature must be considered when determining the rapid cooling of the IP cylinder.
引文
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