The invention relates to a method for evaluating the separation effect of a coarse
powder separator during mixed
coal milling. The method comprises the steps: evaluating the separation effect of the coarse
powder separator during mixed
coal milling according to the amount of coarse pulverized
coal in fine pulverized coal at an outlet of the coarse
powder separator before entering the next processor the amount of fine pulverized coal in the coarse pulverized coal returned to a coal mill, wherein before entering the next process, the smaller the amount of the coarse pulverized coal in the finepulverized coal at the outlet of the coarse pulverized coal separator is, the better the separation effect of the coarse pulverized coal separator is; the smaller the amount of the fine pulverized coal in the coarse pulverized coal returned to the coal mill is, the better the separation effect of the coarse pulverized coal separator is. According to the invention, the test time is shortened, and the field coordination
workload of the outlet pulverized coal
fineness test of the coarse powder separator is reduced; the test boundary conditions are simplified, the test cost is reduced, the changerule of the performance of the coarse powder separator in the transformation or overhaul period can be known, the design, operation and maintenance and transformation work of the
power station boilerpulverizing
system can be facilitated, and the energy-saving level of the
power station boiler pulverizing
system can be improved.