LNG Steam Simulator Exercise
007. Run the Simulator to Prepare Steam Regulators for Normal Operation
[Load Snapshot "Ex_007_Prepare Steam Regulators for Normal Operation"]
- 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 Stop Valves
are open.
Distilled Water Tank (DWT) & Atmospheric Drain Tank (ADT):-
Both DWT & ADT about 60% full.
>> Procedure to prepare Steam Regulators for normal operation
T/bines and Feed:
1 Ensure IP regulator by-Pass is closed.
2 Ensure HP regulator by-Pass is closed.
3 Ensure 875/150 regulator by-Pass is closed.
4 Ensure Atomizing Steam regulator by-Pass is closed.
5 Ensure 875/35 regulator by-Pass is closed.
6 Open IP Regulator inlet and outlet valves.
7 Open HP Regulator inlet and outlet valves.
8 Open 875/150 Regulator inlet and outlet valves.
9 Open Atomizing Steam Regulator inlet and outlet valves.
10 Open 875/35 Regulator inlet and outlet valves.
11 Click the SP button alongside the IP Regulator and check set point is about 36.5 psi (2.52 Bar).
12 Click the SP button alongsied the 875/35 Regulator and check set point is about 33.0 psi (225 kPa). Both of these regulators supply steam to the 35 psi line but, because the IP set point is higher, there is a bias in favour of the 875/35 regulator. Consequently if IP steam is available then this is used in preference to the 875/35 steam.
13 The 35 psi (240 kPa)dump regulator is not adjustable. It will dump steam from the 35 psi line at around 40 psi (275 kPa).
14 Click the SP button alongside the HP Regulator and check set point is about 153 psi (1050 kPa).
15 Click the SP button alongside the 875/150 Regulator and check set point is about 145 psi (1000 kPa).
16 Both of these regulators supply steam to the 150 psi line but, because the HP set point is higher, there is a bias in favour of the 875/15 regulator. Consequently if HP steam is available then this is used in preference to the 875/150 steam.
NOTE:
1) Check Knowledgebase - .........
Singapore Polytechnic