船舶预处理车间旋风分离器组的分离效率研究

Study on Separation Efficiency of Cyclone Separator Group in Ship Pretreatment Workshop

以XLK型旋风分离器为原型,通过采用计算流体力学的方法,运用Rosin-Rammler分布函数拟合某大型船舶加工企业预处理车间的粉尘粒径分布,使用CFD软件对预处理车间并联式旋风分离器组进行了多工况下的流场与分离效率的数值模拟研究,分析工作工况下旋风分离器组的速度场对粉尘颗粒分离效率的影响。同时在原有旋风分离器组的布置基础上进行结构优化,针对此类型旋风分离器截面面积变化较大引起的漩涡造成较大阻力损失的情况,将传统等直径圆筒型进气管道结构优化为直径渐变型圆管结构。仿真结果表明,当改用直径渐变型圆管结构作为主进气管道,分离效率得到一定提高。

Taking XLK cyclone separator as the prototype,by using computational fluid dynamics,Rosin-Rammler distribution function was used to fit the dust particle size distribution in the pretreatment workshop of a large ship processing enterprise,and CFD software was used to simulate the flow field and separation efficiency of the parallel cyclone separator in the pretreatment workshop under multiple working conditions.The influence of velocity field of cyclone separator on dust particle separation efficiency was analyzed under different working conditions.At the same time,based on the layout of the original cyclone separator group,the structure was optimized.Aiming at the situation that the vortex caused a large resistance loss due to the large variation of the cross-section area of this type of cyclone separator,the structure of the traditional equal-diameter cylindrical inlet pipe was optimized to the circular pipe structure with gradual diameter.The simulation results show that the separation efficiency can be improved when the main inlet pipe is used as circular pipe with gradual diameter.