LNG Steam Simulator Exercise

008. Run the Simulator to Start a LP Steam Generator

[Load Snapshot "Ex_008_Both Blrs - low fire_Start LP Stm_Generator"]

The LP Steam Generator provides a separate (isolated) system for steam heating of oil tanks. This isolated steam system is provided to reduce the chance of oil contamination of the steam in the main steam systems.

- Asssume scenario as described below [but check to confirm] and then follow the given procedures

Electrical Power:-

Shore Power:Off; Emergency Generator:Auto Stand-by; Both Turbo Generators:Off; Diesel Generator:On

Deaerator:-

Full with guage glass reading between 60~70 mm

Both Boilers:-

Both boilers firing on DO. Both Boiler Press - aboout 6 Mpa; Desuperheated steam is available.

Distilled Water Tank (DWT) & Atmospheric Drain Tank (ADT):-

Both DWT & ADT about full (at least above 60%).

>> Procedures for starting a Low Pressure Steam Generator:-

Main Distrib:
1 Close Contaminated Feed Pump Breaker
Condensate:
2 Open Contaminated Drain Tank (CDT) Tank to CDT pump valve
3 Open CDT pump to LP Steam Gen valve
4 Ensure Contaminated Drain Tank (CDT) is full
5 Start CDT pump
LP Steam Gen:
6 Level in gauge glass rises automatically to a working value.
7 Open steam steam generator supply valve.
8 Open steam steam generator main feed valve.
9 Open steam steam generator regulator supply valve.
10 Check the 1.55 MPa (15.5 Bar) regulated pressure rises and settles.
11 Check the 0.83 MPa (8.3 Bar) regulated pressure rises and settles.
12 Open all the steam heating valves.

NOTE:

1) Check Knowledgebase - .........