OALib Journal期刊
ISSN: 2333-9721
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600mw锅炉热态下水冷壁流量分配特性研究
, PP. 34-39
Keywords: 锅炉,水冷壁,流量分配,调节阀,水动力
Abstract:
在建立管壁受热模型的基础上,通过对炉内进行区域分段,研究了炉膛内水冷壁沿高度方向上的热负荷分布情况。通过以在水平方向上的热负荷分配系数为媒介,将沿高度方向上的热负荷转变为沿水平方向上的热负荷分布,以水冷壁区段在水平方向上所受热负荷最大和最小两极限位置处为例,进行在热态下水冷壁入口处调节阀开度的计算,提出了通过工质传热系数对工质进行饱和水、汽水混合物、过热蒸汽相态区段的划分,以沿炉周最高负荷位置处(即相对宽度0.54处)水冷壁管为计算基准,计算各相态区段的压降,从而相应调整其他相对位置处阀门的开度使水冷壁各管压差相同,使水冷壁管的水流量带走与之相应的热负荷,保证了热态下水冷壁的水动力稳定性。
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