朱晨亮,尤亮,江永,陈旻,杨彪
ZHU Chenliang,YOU Liang,JIANG Yong,CHEN Min,YANG Biao

• 1:华能海门电厂

摘要(Abstract)：

某1 000 MW机组汽轮机凝汽器压力、排汽温度均高于设计值,主要原因在于凝汽器喉部布置的抽汽管道、众多支撑管、高旁减温减压器、7/8号低加、锅炉启动疏水消能装置、喉部壳体倾斜布置形式等导致了汽轮机排汽在凝汽器冷却管束入口分布不尽合理,从而排汽阻力大,制约了凝汽器管束的冷却效果。通过改造凝汽器喉部内设备布置形式,加装导流装置,改善凝汽器管束入口流场分布,减小排汽阻力,最终达到降低汽轮机热耗率的目的。改造后供电煤耗平均下降约1.48 g/k Wh,年节约标煤2 663 t,投资回收期不到2年,经济社会效益均十分显著。
Condenser pressure and exhaust steam temperature of 1 000 MW steam turbine units were higher than the design value. The main reason was that steam extraction pipelines at the condenser throat, the numerous supporting tubes, high-pressure bypass temperature and pressure relief valve, low-pressure heaters No.7 and 8, start-up drain energy-relief device and inclined layout of throat shell led to unreasonable steam distribution of the steam turbine at cooling bundle inlet, resulting in large exhaust resistance and reduced cooling effect of condenser bundle. Through equipment layout transformation in the condenser throat, guiding device installation, flow field distribution improvement of the condenser tube bundle inlet and exhaust resistance reduction, heat consumption rate of the steam turbine is decreased. After the transformation, net coal consumption rate decreased about 1.48 g/k Wh on average, with an annual standard coal saving of 2663 tons;the payback period is less than two years, meaning there are significant economic and social benefits.

关键词(KeyWords)： 1 000MW机组;凝汽器喉部;导流装置;排汽阻力优化;节能
1 000 MW units;condenser throat;guiding device;exhaust resistance optimization;energy-saving

Abstract:

Keywords:

基金项目(Foundation):

作者(Author): 朱晨亮,尤亮,江永,陈旻,杨彪
ZHU Chenliang,YOU Liang,JIANG Yong,CHEN Min,YANG Biao

DOI: 10.19585/j.zjdl.201708012

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