汽轮机润滑油中颗粒数不合格的分析与处理

汽轮机润滑油系统的清洁度,直接影响到机组的安全运行。介绍了2011年沙洲电厂排查1号主机润滑油系统中5～15μm颗粒数超标的分析思路及消缺经验。润滑油中5～15μm颗粒数超标的主要原因是主油箱人孔门密封不好,周围空气中污染物侵入油箱造成颗粒数超标,经过严密封堵人孔门后油中5～15μm颗粒数指标已经合格。在经过调研比对后,参照目前国内大部分同类电厂主油箱负压维持在-0.3～-1.5kPa的技术规范,利用排油烟风机出口碟阀进行节流,将1号机主油箱负压由-4.1kPa逐渐调至-1.0kPa左右,机组运行至今安全、可靠,证实了该运行方案可行。

Analysis and Processing of Particle Number Unqualified in Steam Turbine Lubricating Oil

Steam turbine lubricating oil system cleanness,directly affect the safe operation of the unit.Introduced in 2011,Shazhou power plant investigation for lubricating oil system of 5～ 15 μm particle number exceed the standard ways of analysis and elimination of experience.Lubricating oil 5 to 15 μm particle number exceed the standard is the main reason of the main tank manhole door sealing is not good,the ambient air pollution caused by the particle number exceed the standard fuel tank,through rigorous plugging hole in oil are 5 ～15 μm particle number index already qualified.After the investigation after the ratio,with reference to the current domestic most similar power plant main fuel tank pressure maintained at-0.3～-1.5 kPa specification,the fume exhaust fan outlet butterfly valve throttling,the No.1 main fuel tank pressure gradually from-4.1kPa to-1.0kPa or so,since the operation is safe and reliable,proved that the scheme is feasible.