超临界空冷机组低负荷运行期间溶氧升高的异常分析

Analysis of Abnormal Dissolved Oxygen Rise During Low-load Operation of Supercritical Air-cooling Units

某电厂350 MW直接空冷机组检修后存在低负荷运行期间溶氧升高、高负荷运行期间溶氧正常的异常现象。从数据分析、现场调整等方面查找原因,分析得出异常现象是机组真空冷却器底部回水管道不畅所导致,并给出了相应的解决措施,为类似机组提供参考。

After the maintenance of 350 MW direct air-cooling units in a power plant,there are abnormal phenomena of dissolved oxygen rise during low-load operation and normal dissolved oxygen during high-load operation.When the causes are searched for from data analysis,field adjustment and other aspects,it is found that the abnormal phenomenon occurred because the return water pipe at the bottom of the vacuum cooler of the unit is blocked,and the corresponding solutions are put forward to provide reference for similar units.