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125MW汽轮发电机组都配置一台高压喷雾填料式除氧器,如图1所示。这种除氧器上都设有喷雾式除氧装置,下部装有填料式除氧装置,能够对凝结水进行二次除氧,可以保证达到合格的给水除氧指标,所以它是火力发电厂大型高参数机组的理想除氧设备。但是由于这种除氧器填料层下面蒸汽环室的结构不合理,使加热蒸汽在蒸汽环室各配汽口中的分配不均,影响除氧效果;另一方面,会使蒸汽管道入口附近的筒壁产生裂纹,威胁机组的安全运行。
125MW turbo-generator units are equipped with a high-pressure spray-filled deaerator, as shown in Figure 1. This deaerator is equipped with a spray deaerator, the lower part of the packing deaerator, the second deaeration of the condensate can be guaranteed to meet the water supply oxygen index, so it is a thermal power plant Ideal for large high-parameter unit deaerator equipment. However, due to the unreasonable structure of the steam ring chamber below the packing layer of the deaerator, the heating steam is distributed unevenly among the steam outlets of the steam ring chamber, affecting the oxygen scavenging effect. On the other hand, Tube wall cracks, threatening the safe operation of the unit.