The situation of steam blowing by using pressure-stabilizing method and pressure-reducing method under condition without putting out the fire in debugging process of boiler no.4 for supercritical unit in Huaneng Taicang Power Generation Co Ltd has been presented.Practice in blowing shows that the required pipe-blowing coefficient and blowing quality can be ensured no matter what method is used for steam blowing

however

the effectiveness of pressure-reducing method under condition without putting out the fire is superior than that of pressure-stabilizing method

saving time

fuel

and desalting water

and being simple in operation.