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水垢可以破坏蒸汽发生器水循环

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25
7
2017
水垢可以破坏蒸汽发生器水循环
The scale can destroy the steam generator water cycle
蒸汽发生器水循环有天然水循环和强迫水循环两种方式。前者是靠上升管和降低管的汽水比重不一样发作的压力差而进行的水循环。
The boiler water cycle has two ways: natural water circulation and forced water cycle. The former is a water cycle in which the weight of the riser is different from that of the tube.
后者主要是依托水泵的机械动力的作用而迫使循环的。不管是哪一种循环方式,都是通过规划核算的,也就是说确保有满足的流转截面积。当炉管内壁结生水垢后,会使得管内流转截面积减少,活动阻力增大,破坏了正常的水循环,使得向火面的金属壁温添加。
The latter mainly relies on the mechanical power of the pump to force the circulation. Either way, it is calculated by planning, which is to make sure there is a satisfactory flow area. When the inner wall of the furnace tube is made, the area of the tube is reduced and the activity resistance increases, and the normal water circulation is destroyed, and the metal wall temperature is added to the surface of the fire.
蒸汽发生器管路安全被水垢堵身后,水循环则彻底中止,金属壁温则更高,长时间下去就易因过烧发作爆管事端。水冷壁管是均匀安置在炉膛内的,吸收的是辐射热。

When the pipeline safety is blocked by the scale, the water circulation is completely suspended, the metal wall temperature is higher, and the long time is easy to be overblown. The water - cooled wall tube is uniformly installed in the furnace, absorbing radiation heat. 

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