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发电厂凝汽器为什么要保持真空

更新时间: 2020-07-15 00:00:00     

凝器不但要保持真空,而且对真空度还有严格的要求。所谓“真空”就是负压状态,汽轮机的高温高压蒸汽经过高压缸,中压缸,低压缸最后排入凝器,所以凝器的真空度直接影响到蒸汽流动的顺畅,增大了汽轮机的功率。一般运行中发生凝器真空下降,会直接影响汽轮机的效率,真空降低到规定数值时,应立即减负荷(减小蒸汽流量),否则可能会造成低压缸超压,对末极叶片也会造成威胁。

关键词: 发电厂 为什么 保持 真空

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