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Hydrogen Pollution in 300MW hydrogen-cool in g turbo-generators threatens the unit security operation. By comparison double -flow seal oil with single-flow seal oil, it is pointed out that the main reas on leading hydrogen purity dropping is that the content of air in hydrogen-side seal oil is on the high side. Three methods to treat the problem are provided. 氢冷发电机组氢气污染问题严重影响着机组安全运行 ,从发电机组密封油系统的类型角度 ,通过对双流环、单流环密封油系统进行对比分析 ,提出影响氢气纯度下降的主要原因是氢侧密封油空气含量偏高 ,就如何解决问题提出了 3套治理方案。
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