Research for Long Period Maintenance Technology of Double-Inlet Double-Outlet Coal Mill

摘要

To master the law of steel balls abrasion, optimize the unit electric consumption and characteristics of pulverized coal, and implement a reasonable long period maintenance for double-inlet double-outlet coal mills, we sampled and tested the pulverized coal for a long period, sieved the steel balls and supplemented some steel balls on a supercritical W-flame boiler. The technique of optimized supplement improved the situation that the pulverized coal is too fine, increased pulverized coal uniformity index from 0.58 to 0.82, and reduced the unit electric consumption of the mill by 2.54kWh/t. Therefore, it is feasible that we can obtain the real-time distribution of steel balls and reasonable signal of supplement for double-inlet double-outlet coal pulverizing system meanwhile maintain the unit electric consumption of pulverized coal and the characteristics of pulverized coal in a high-level.