HP磨煤机主要运行参数对煤粉细度及单耗的影响

基于磨煤机动态分离器分离原理提出了分离强度参数α；建立了磨煤机给煤量B、一次风量Q、分离器转速n对煤粉细度R90及磨煤单耗Em影响的静态模型；根据模型就各运行参数对煤粉细度和磨煤单耗的影响及敏感性进行了分析。得到如下结论：α/B与R90呈指数关系，与Em呈显著的线性关系；Em与lｎ（Ｒ９０） 呈显著的线性关系；给煤量、一次风量和分离器转速对煤粉细度的影响是独立的，对磨煤单耗的影响是不独立的；分离器转速及一次风量变化时R90和Em的变化约为磨煤机出力变化时的2倍；R90受运行参数的影响约为Em的3倍。

Influence of Major Operating Parameters of HP Mill on Coal Fineness and Specific Power Consumption

In this paper, the separation strength parameter“a” is proposed based on the dynamic classifier principle. A static model describing the influence of mill capacity (B), primary air rate (Q) and rotational speed of dynamic classifier (n) on coal fineness (R90) and specific power consumption (Em) is also established. Based on the model, the influence and sensitivity of the operation parameters on coal fineness and specific power consumption are analyzed, from which following conclusions are drawn: α/B is exponential to coal fineness (R90) and strongly linear to specific power consumption (Em); Em demonstrates linearity to ln (R90). The influences of mill capacity (B), primary air flow and rotational speed of dynamic classifier on R90 are independent of each other but not independent on Em; when n and Q change, the changes of R90 and Em are two times of those when B changes. The impact of operation parameters on R90 is three times of that on Em.