By using the isokinetic sampling method with zero- pressure pendulum probe, the samples of pulverized coal have been taken from the outlet pipeline of ZGM medium speed coal pulverizer. Through analysis of the fineness and mass for pulverized coal, the influence of some major factors upon the operating characters of said coal pulverizer, such as the damper opening degree of classifier, the primary air flow rate. the hydraulic loading force of grinding rolls etc. , have been understood. Analysis shows that the effective adjusting range of classifier is within 45°-65°.the corresponding fineness of pulverized coal R90 varying within 10%-40% ;the damper opening degree of said classifier has com paratively remarkable influence upon the ventilation resistance and the specific consumption of coal pulverizer;and the air flow rate affects the output capacity of coal pulverizer,the fineness of pulverized coal, and the power consumption of coal - pulverizing system, etc.. Under condition of satisfying the requirements of output capacity of coal pulverizer, the loading force should be reduced as possible.
Thermal Power Generation
medium speed coal pulverizer
zero-pressure pendulum sampling probe