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There is a serious coking risk in 660MW boiler mixed with high sodium coal in a power plant, In order to effectively prevent and control the boiler coking problem and ensure the safe and stable operation of the unit, the optimization and adjustment of pulverizing system was studied, the experimental research was carried out from the aspects of loading force optimization of coal mill, cold and hot primary air leveling, wind-powder ratio and separator optimization, according to the test results, optimization and adjustment are made. By tuning of the coal pulverizing system, improve the uniformity of four root powder tube carrying powder, to eliminate the vibration problem of the initial, reduce the effect on the thermal load in the early years of the start, avoid the problem of heating surface ultra gentle coked, ensures the safety of the equipment, and gives the gasification of different coal pulverizers guidelines export air temperature.
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