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直流锅炉的运行特点剖析

发布日期:2020-04-08 内容来源于:http://jcolewines.com/

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        直流锅炉中工质的流动无自平衡性,即吸热量多的管子因工质的比容增加,阻力加大,反而使通过的流量减少,产生了热偏差。因此,UP型直流锅炉多采用中间混合器,将水冷壁管中的流体在中途引出炉外进入混合器,使各管中流体的热焓、温度和压力充分混合均匀后再流回水冷壁以消除各管间的热偏差。混合的次数、位置和方法取决于锅炉的容量和特性。由于运行条件对锅炉的调峰特性要求越来越高,直流锅炉对负荷变动的适应能力有了重视。而具有螺旋上升管圈的直流锅炉对炉内导热油加热器热偏差的敏感性小,管子间不存在两相流体分配问题,也不需要在管口装设孔板,因而具有良好的低负荷运行特性。此种类型的直流锅炉在电厂中采用较其他类型为多。

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相关标签: 导热油加热器

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