| 摘要 |
PURPOSE:To obtain a novel warming sequence by carrying out a leakage test on a ring header circumference after a master fuel trip MFT and making a decision thereof, and thereafter carrying out warming of the ring header circumference. CONSTITUTION:During the operation of a forced fan FDF after MFT, if a ring header warming starting switch B is turned ON is a state where a ring header circumference warming valve is open (a header circumference warming allowable condition A) and in a state where a heavy oil interrupting valve and a full burner valve are close (a warming pump interlock D), a warming pump is started. In 30 seconds after starting, if a ring header oil pressure is more than a defined valve (a ring header circumference leak test completion condition C), the warming pump is continuously operated to circulate heavy oil in the ring header and to make uniform the temperature distribution of heavy oil. |
