引风机出口烟道布置不合理，会引发流动阻力增加、脱硫效率降低等一系列问题。针对新疆某电厂炉后布置紧凑、引风机出口汇流烟道流动紊乱的情况，采用计算流体动力学（computational fluid dynamics,CFD）对引风机出口汇流烟道进行了数值模拟，并通过加设导流板的方式优化了流场，得到了较好的效果。

Due to unreasonable arrangement of flue behind induced draft fan (IDF), there are some problems in terms of a flow resistance increase and a desulfurization efficiency decrease. According to the phenomenon of compact arrangement of boiler tail section and flow breakdown of conflux flue behind IDF in a power plant of Sinkiang, the conflux flue behind IDF was numerically simulated by computational fluid dynamics (CFD), and some splitters were used for flow field optimization with good effect.