袋式除尘器喷吹均匀性的数值模拟

Numerical Simulation on Blowing Uniformity of Bag Filter

脉冲袋式除尘器喷嘴喷吹流量的不均匀性是影响布袋寿命的重要因素,应用FLUENT软件对除尘器喷射管内气体的流场进行数值模拟,得到了各喷嘴的流量及速度分布,分析了喷嘴喷吹流量不均匀的原因,认为喷嘴孔径截面积之和过大是导致流量不均匀的主要原因,通过改进设计,使各喷嘴流量趋于一致。

The non-uniformity of mass flow rate of nozzles in a pulse bag filter is an important factor which influences service life of bags.By using CFD software-FLUENT,the gas flow field in injection pipe was simulated.The mass flow rate and velocity distribution of each nozzle were presented.The major cause of mass flow rate nonuniformity was analyzed.It indicated that total section area of nozzles is too large to cause mass flow rate nonuniformity.Then improvements were suggested to meet requirement.