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复合循环锅炉有哪些独特之处?

点击:0发表时间:2018/08/02

随着近些年我国对节能环保的重视,传统燃煤锅炉已经渐渐被人们所淘汰,目前比较流行的有数控锅炉、天然气锅炉和电加热锅炉,而因为工业生产的需求量大和使用条件的限制,再加上经济条件的限制,燃煤数控锅炉依然是工业生产常用的锅炉类型。其中复合循环锅炉是一种循环率很大的锅炉,它带有一种强制流动的再循环泵,可以使循环倍率大于1。
它具有以下特点:
1.需要有能长时间在高温高压下运行的循环泵。
2.锅炉汽水系统的压降小,与直流锅炉相比,能节省给水泵的能量消耗。
3.锅炉运行时的低负荷几乎没有限制,而一般直流锅炉的低负荷往往限制在额定负荷的20%-30%内,同时,由于在低负荷时,复合循环锅炉没有旁路系统的热损失,因此减少了机组热效率的降低。
4.炉膛水冷壁内工质流动可靠,很少产生故障,因此,在各种负荷下,水冷壁烧坏爆管的可能性很小。
5.旁路系统简单化,使机组启动时的热损失较小。
与同容量的直流锅炉相比,复合循环锅炉的水冷壁中能有较大的质量流速,以保证水冷壁的安全工作。这在低负荷下运行时,其优点尤为明显。所以复合循环锅炉在各国的亚临界和超临界压力大型机组中得到广泛应用。

环保锅炉.jpg

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