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压水堆蒸汽发生器水滴重力分离空间是汽水分离装置的重要组成部分,是连接汽水分离器和蒸汽干燥器的纽带。蒸汽发生器的设计,除了要选用分离效率高,结构紧凑的汽水分离器和干燥器外,还要合理选择重力分离空间高度。高度太低,湿分得不到充分的重力分离,将会影响干燥效果;高度太高,将会增加蒸汽发生器和核岛设施的投资。文中对重力分离空间蒸汽携带水滴的过程进行了理论研究,推导出了水滴重力分离高度,水滴的飞升直径和飞升速度的一般表达式,在分析中还考虑了汽液两相间速度的不一致(即滑动比S),并提出了直径-粘度组合项。理论研究得出的结论可为确定蒸汽发生器重力分离空间高度提供依据。
Water pressure steam generator water droplets gravity separation space is an important part of the water separator, is connected to the water separator and steam dryer tie. Steam generator design, in addition to the selection of separation efficiency, compact water separator and dryer, but also a reasonable choice gravity separation height. The height is too low and the moisture will not be fully gravitationally separated, which will affect the drying effect. If the height is too high, it will increase the investment in steam generator and nuclear island facilities. In this paper, the theoretical study on the process of water droplets carried by gravity separation space steam is carried out, and the general expression of droplet gravity separation height, droplet diameter and ascending velocity is deduced. In the analysis, the inconsistencies between vapor-liquid two- Slip ratio S), and proposed diameter - viscosity combination of items. The conclusions drawn from the theoretical studies can provide the basis for determining the height of gravity separation space of the steam generator.