Abstract:

Abstract:This paper analyzed the necessity of water wash to boiler air pre heater and feasibility of on line water wash,indicated
two methods to water wash air pre heater,and descried the process of air pre heater on line water wash.The operation parameter and waste water parameter indicated that water wash is effective and secured the safety and stability of unit operation.

Key words: Keywords:600 MW unit, air pre heater, on line water wash, waste water