boiler ignition with turbine vacuum time

Marine steam turbines operating procedure

The vacuum can now be raised to its operational value and also the gland steam pressure. The turbines are now ready for use. While waiting for the first movements from the bridge and between movements the turbine must be turned ahead once every five minutes by steam blasts. If there is any delay gland steam and the vacuum should be reduced.

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New procedure speeds cold start protects turbine | Power ...

Sep 01 1995 · The initial boiler firing rate limit of 2 F/minute (120 F/hr) is well below the manufacturer`s lim it of 150 F/hr for the boiler and turbine. The firing rate is not exceeded during the pressure and...

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Fast Start Combined Cycles: How Fast is Fast? | Power ...

Mar 09 2017 · An auxiliary boiler provides sparging steam for the HRSG (to maintain warm drums) and condenser and seal steam for the steam turbine to maintain condenser vacuum while the unit is offline ...

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Unit lightup synchronisation & shutdown

Oct 16 2013 · reduce the boiler load gradully. trip the boiler. the vacuum breaker valves should not be opened until the turbine unit has coasted down. vacuum should be killed before gland sealing steam is shut off. aux oil pump starts in auto at 2850 rpm. jop start in auto at 1200 rpm. 40. shut down when the vacuum reaches zero ...

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