Abstract: The operations of the ash and slag removing systems of the two 600MW subcritical units in Yimin Power Plant project phase Ⅱ were introduced, some frequently occurring faults of the main equipments were described, and the handling measures adopted were expounded. The ash and slag removing system optimization scheme were analyzed, which is proposed for energy saving and emission reducing. And the trying out of the scheme in Yimin Power Plant shows that the scheme is useful for digging energy saving potential, raising economic benefit and safety operation of units.

Key words: 600MW subcritical unit, ash and slag removing system, frequently occurring faults, precontrol measure, system optimization