OIL SYSTEM of turbine in thermal power plant.ppt

steam based thermal power plant , oil system of turbine

1. TURBINE OIL SYSTEM

2. TURBINE OIL IS USED FOR
LUB OIL
JACKING OIL
OIL TO GATE VALVE GEARING
TURBINE GOVERNING OIL
LPBP GOVERNING OIL
GENERATOR SEAL OIL
REQUIREMENT OF TURBINE OIL

3. MOT
AOP’s and JOP’s
MOP and INJECTORS
COOLERS
OIL TEMPERATURE CONTROL VALVE
DUPLEX FILTERS
OIL THROTTLES
HYDRAULIC TURNING GEAR
VAPOUR EXHAUSTER FANS
CENTRIFUGE
DOT and LOT
ELEMENTS OF OIL SYSTEM

4. DESCRIPTION OF TURBINE COMPONENTS IN OIL SYSTEM
TURBINE BEARINGS - 7Nos. HPTF, HPTR, IPTR, LPTR, GENF,
GENR,EXCR
HYDRAULIC TURNING GEAR - IN IPTR PEDESTAL
HAND BARRING GEAR - IN IPTR PEDESTAL
OIL THROTTLE VALVES - 1No. FOR EACH BEARING
MOP & PRIMARY OIL PUMP - IN FRONT PEDESTAL
VAPOUR LINES - FROM EACH PEDESTAL WITH REGULATING VALVE

5. TG LUB OIL & JACKING OIL SYSTEMS
• LUB OIL SYSTEM
–LUBRICATION
–BARRING GEAR
–HEAT DISSIPATION
• JACKING OIL SYSTEM
–SHAFT LIFTING
–PREVENT DRY FRICTION
–OVERCOME BREAKING AWAY TORQUE DURING START UP ON
HYDRAULIC TURNING GEAR

6. MOT
AOP-2AOP-1EOP
COOLERS
FILTERS
LUB OIL SUPPLY HEADER
LUB OIL RETURN HEADER
I
N
J
E
C
T
O
R

7. TURBINE LUBRICATING OIL SYSTEM

8. MAJOR EQUIPMENTS IN LUB OIL SYSTEM
MOT - WITH DRAIN CHAMBER, CLEAN CHAMBER, MOT BASKET
STRAINER, AOPs, EOP, OIL INJECTOR 1, JOPs, DCJOP, OIL VEFs, LEVEL

INDICATOR & LEVEL SWITCH, MOT SAMPLING POINT
LUB OIL COOLER & LUB OIL FILTER
TEMPERATURE CONTROL VALVE
OIL PURIFIER / MOT CENTRIFUGE
LEAKAGE OIL TANK WITH LEAKAGE OIL PUMP
DIRTY OIL TANK
OIL CANAL AT 13mtr - OIL INJECTOR 2, MOP SUCTION & DISCHARGE
PIPING, LUB OIL SUPPLY HEADER, LUB OIL RETURN HEADER, VAPOUR

HEADER, JO SUPPLY HEADER, IMPULSE PIPINGS

9. AUX STEAM
TEMPORARY
TANK
DRAIN
CIRCULATION
PUMPS
L.O OUTLET
L.O INLET
ECW INLET
ECW OUTLET
LUB OIL COOLING ARRANGEMENT

10. LUB OIL TEMPERATURE CONTROL
TO INCREASE TEMP - BYPASS COOLERS
TO DECREASE TEMP - PASS THROUGH COOLER
TEMP. CV

11. LUB OIL FILTER
FILTER CHANGEOVER
CLOSE DRAIN OF STANDBY FILTER
OPEN VENT OF STANDBY FILTER
CRACK OPEN EQUALIZING VALVE & NOTE PR.
DIP
WAIT TILL VENT OF STANDBY FILTER BECOMES
WARM
CLOSE THE VENT OF STANDBY FILTER AND
LEAVE IT CRACK OPEN & NOTE THE PRESSURE
ROTATE CHANGEOVER VALVE UNTIL ARROW
FACING STANDBY FILTER
CLOSE THE VENT VALVE FULLY & NOTE THE
PRESSURE
NOW OTHER FILTER CAN BE DRAINED IF
REQUIRED

12. OIL CENTRIFUGE
BOWL SPEED : 8425 rpm (approx)
SUCTION : FROM DRAIN / CLEAN
CHAMBER
DISCHARGE : TO MOT IN RETURN LINE
BOOSTER PUMP TYPE : GEAR PUMP
FEED
PUMP
HEATER
OIL
CENTRIFUGE
FLOW
METER
FROM MOT
SIGHT GLASS
TO MOT
ANTI FLOOD TANK

13. TG LUB OIL & JACKING OIL SYSTEMS
TECHNICAL DETAILS OF OIL PUMPS
MOP AOP EOP AC JOP DC JOP
QUANTITY 1 2 1 2 1
MAKE KSB KSB ALLWEILER
AG
ALLWEILER
AG
ALLWEILE
R AG
CAPACITY 139 m
3
/hr152.24 m
3
/hr108 lit/m 76 lit/m 76 lit/m
DISCH.PR 8.2 ata84.7 MWC 27.66M 120 bar 120 bar
SPEED
(RPM)
3000 1485 1425 2950 2950
DRIVE TURBINE AC MOTOR DC MOTOR AC MOTOR DC MOTOR

14. OIL PROPERTIES OF IMPORTANCE
MECHANICAL IMPURITIES : < 100 ppm
MOISTURE CONTENT : < 100 ppm
ACIDITY : < 0.14 mg of KOH/gm
KINEMATIC VISCOSITY (37.8 DEG): 47.5-49.5 CS
KINEMATIC VISCOSITY (50 DEG) : 28 CS
FLASH POINT : 200DegC
POUR POINT : -6 DegC
ASH CONTENT : 0.01% (BY WEIGHT)

15. LEAKAGE AND DIRTY OIL TANKS
LEAKAGE OIL TANK : AT 0m
INPUTS : FILTER AND COOLER DRAINS
OUTPUT : MOT THROUGH LOP
DIRTY OIL TANK : AT 0m
INPUTS :LUB OIL FILTER AND COOLER TRAY DRAINS
OIL CENTRIFUGE TRAY DRAIN
ANTI FLOOD TANK DRAIN
MOT ROOM AND OIL CANAL FLOOR DRAINS
OUTPUT : NO (TO BE COLLECTED IN BARRELS)

16. AOP/EOP START PERMISSIVE : NIL
AOP/EOP STOP PERMISSIVE : NIL
AOP-1 STARTS ON AUTO : SLC OF AOP-1 IS ON AND AOP-2 TRIP
OR LUB OIL PRESSURE < 5.48 Kg/cm
2
AOP-2 STARTS ON AUTO : SLC OF AOP-2 IS ON AND AOP-1 TRIP

OR LUB OIL PRESSURE < 5.47 Kg/cm
2
EOP STARTS ON AUTO : LUB OIL PRESSURE < 1.78 Kg/cm
2
SLC OF AOP/EOP

17. Jacking oil pump-1 start on auto : SLC of JOP-1 ON
and turbine speed < 510 rpm
Jacking oil pump-2 start on auto : SLC JOP-2 ON
and JOP-1 trip or jacking oil

pressure < 100kg/cm2
and turbine speed < 510 rpm
or on barring with a time delay of

5 sec
command for-
Switch off JOP -1
Switch on JOP -2
Switch off SLC
DC Jacking oil pump srart on aut: SLC ON
and JOP 1 & 2 fails to develop
pressure > 100 kg/cm2
Jacking oil pump stop on auto : Turbine speed > 540 rpm
SLC OF JOP

18. SLC OF TURNING GEAR
TURNING GEAR VALVE PERMISSIVE FOR OPENING:
- SEAL OIL / H2 DP > 0.9 KSC AND
-SEAL OIL PRESSURE OF TE/EE > 3.8 KSC
TURNING GEAR VALVE OPENS ON AUTO IF
SLC TURNING GEAR ON AND TURBINE SPEED < 200RPM
TURNING GEAR VALVE CLOSES ON AUTO IF
SLC TURNING GEAR ON AND TURBINE SPEED > 250 RPM
TURNING GEAR VALVE CLOSES ON PROTECTION IF
- FIRE PROTECTION OPERATES
-LUB OIL PRESSURE < 1.88 KSC

19. IF FIRE PROTECTION - 1 PRESSED
SLC PUMPS OFF COMMAND (AOPS)
AOP - 1 & 2 OFF COMMAND
SLC EOP ON COMMAND
EOP ON COMMAND
IF FIRE PROTECTION - 2 PRESSED
SGC OIL SUPPLY OFF COMMAND
SLC PUMPS OFF COMMAND (AOPS)
AOP - 1 & 2 OFF COMMAND
SLC EOP ON COMMAND
EOP ON COMMAND
SLC JOPS OFF COMMAND
JOP - 1 & 2 OFF COMMAND
SLC TURNING GEAR VALVE OFF COMMAND
TURNING GEAR VALVE CLOSE COMMAND
DCJOP ON COMMAND
VACUUM BREAKER VALVE OPENS
FIRE PROTECTION

20. EFFECTS OF EXCESS OIL FLOW TO BEARINGS
PROBLEMS WITH MORE FLOW :
OVERLOAD OF AOP
ENDANGER DURING COASTING DOWN WITH EOP DUE TO LOW
PRESSURE
EXCEEDING RETURN OIL PIPE CAPACITY
OIL LEAK FROM OIL GUARD
INCREASE IN NUMBER OF OIL CIRCULATION AFFECTING AIR
RELEASE PROPERTY
LOW RETURN OIL TEMP. AFFECTING DEAERATION PROPERTY
BEARING LOSSES GET INCREASED

21. LUB OIL SYSTEM LOCAL CHECKS
MOT LEVEL
LUB OIL FILTER CHOCKAGE
LUB OIL PRESSURE - HEADER AND DISCHARGE
LUB OIL TEMPERATURE - BEFORE & AFTER COOLER
CENTRIFUGE PARAMETERS
MOT SAMPLE POINT VALVE
RUNNING EQUIPMENTS HEALTHINESS
BEARING RETURN OIL TEMPERATURES
BEARING RETURN OIL FLOW
ABNORMAL SOUNDS
OIL LEAKS
LEAKAGE OIL TANK LEVEL
DIRTY OIL TANK LEVEL

22. FIRE PRECAUTION
FIRE EXTINGUISHERS - FOAM, DCP AND CO2
MULSIFIRE SPRAY SYSTEM IN MOT, OIL COOLER, OIL FILTER,
CENTRIFUGE AND OIL CANAL
FIRE HYDRANT IN A ROW SIDE STAIRCASE
FIRE PROTECTION PUSH BUTTONS IN
- UCB BACK PANEL
- NEAR TURBINE GOVERNING RACK FRONT
- AT MOT ROOM ENTRY

23. GENERATOR SEAL OIL SYSTEM

24. THANK YOU