Single-stage pressure-reducing pipe-blowing technology adopted for once-through boiler of supercritical 600 MW unit in one power plant usng plasma ignition technology and directly starting up the coal pulverizer to inject pulverized coal into the furnace has been presented

at the same time

the problems occurred in the pipe-blowing process and matters needing to pay attention being analysed and explained.At the time of ignition

the boiler isn't flame-out

and the circulating pump of boiler water being started up for operation.Practice shows that the pressure-reducing pipe-blowing technology adopted for once-through boiler of supercritical unit using plasma ignition and directly starting up the coal pulverizer can make the pipe-blowing coefficient of superheater and reheater to be above#1~3

having good effectiveness.