Some problems existing in the water supplying and flushing stage in the start-up process of ultra-supercritical uint

such as high energy consumption

long working time

and bad flushing effectiveness etc.

for these

an optimization scheme for water supplying and flushing of the boiler under static pressure has been worded out

and being used in the start-up process of ultra-supercritical unit in Huaneng Yuhuan Power Plant.Practice shows that the water supplying and flushing mode of boiler under static pressure is better than the originally designed flushing mode

the net service power being saved 2.85×104 kW·h;70×104 kW·h more electricity being generated;the fuel oil being saved 20 t

boasting remarkable effectiveness.