十四、由集箱中静压变化所引起的并联管子间的流量偏差在第七、第九两节中的分析,都是由假定沿集箱长度介质静压不变而得出的。锅炉省煤器和汽水混合物的管组中,因集箱中的流速很低,上述假设是符合实际情况的。但在过热器和再热器的各级管组中,因集箱中的蒸汽流速高,有时就不能忽略集箱中沿长度介质静压的变化对各管流量分配的影响。关 Fourteen, from the header static pressure changes caused by the parallel pipe flow deviation in the seventh, ninth section of the analysis, are assumed by the length of the header along the medium static pressure derived. The above assumptions are in line with the actual situation since the flow rate in the header is very low in the tube bank of the boiler economizer and the mixture of steam and water. However, in the superheater and reheater pipe groups at all levels, because the header of the steam flow rate is high, sometimes you can not ignore the header along the length of the media static pressure changes on the flow distribution of each pipe. turn off