大流量高压射流粉碎设备的仿真与试验研究

Simulation and experimental study of large flow high pressure jet mill

为解决现有高压射流粉碎设备产能低,无法满足工业生产线使用需求的问题。对高压射流粉碎设备的关键零部件(交互容腔)进行研究,提出一种复合式大流量交互容腔组件。基于Mixture多相流模型和Realizable k-ε湍流模型对交互容腔的内部流道进行计算流体动力学仿真,获得流场的压力、速度和湍动能分布,并获得较优的分流角大小和流道尺寸。研制大流量高压射流粉碎设备样机,并在样机上进行粉碎试验和产能测试。结果表明,大流量高压射流粉碎设备的平均粉碎粒度d[4,3]从75.6μm降到32.7μm,设备的产能稳定在4.2 m^(3)/h左右。研究为工业用大流量高压射流粉碎设备的设计提供理论与试验支持。

In order to solve the problem that the high pressure jet mill equipment has low production capacity and cannot meet the needs of industrial production,the key component--interaction chamber of high pressure jet mill equipment was studied,and a compound large flow interaction chamber was proposed.Firstly,based on the Mixture multiphase flow model and the Realizable k-εturbulence model,the internal flow channel of the interaction chamber was simulated by computational fluid dynamics,and the pressure,velocity,and turbulent kinetic energy distribution of the flow field were obtained,and a better split angle and runner dimensions were obtained.Secondly,a prototype of large flow high pressure jet mill equipment was developed,and the mill experiments and productivity tests were carried out on the prototype.The experimental results show that the average crushing particle size d[4,3]is reduced from 75.6μm to 32.7μm,and the production capacity of the equipment is stabilized at about 4.2 m^(3)/h.The study provides theoretical and experimental support for the design of high-flow high-pressure jet mill equipment for industrial use.