Post on 24-Oct-2015
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WELCOMETO
KNOWLEDGE SHARING SESSION FOR FUEL OIL
SYSTEM
HIGH LIGHT POINTS The following Team Visited to M/s. Faridabad Gas
Power Station (NTPC),Faridabad for Study on Fuel Oil
System and Collected some valuable information from
NTPC.
Mr.A.Srinivas
Mr.D.Nukaraju
Mr.NSKGS. PrasadLet Us Discuss Briefly about Fuel Oil System in this session
About NTPC Power StationM/s. NTPC has installed & Commissioned 432 MW CCPP
–Faridabad Gas Power Station at Faridabad in 1999.
Power Station Configuration is
2X 138 MW Siemens V94.2 Duel Fired Gas Turbine.
2X HP & LP Circuits HRSG.
1 X 156 MW BHEL Make Steam Turbine.
M/s.NTPC has been operating the Gas Turbines with
Both Natural Gas and Fuel Oil (HSD/Naphtha) in 100%
NG, 100% Fuel Oil and Mixed Fuel Mode.
Fuel oil Consumption is 36KL/Hr/GT at 138 MW load
HIGH LIGHT POINTSThe Fuel Oil Handling System consisting of the following systems for Naphtha and HSD.
Unloading SystemStorage SystemForwarding SystemCombustion SystemFuel and Nox Control SystemReturn and Storage of fuel from the gas turbines
(Drainage System)Fire Fighting System
HIGH LIGHT POINTS To supply the required quantity and quality of
Naphtha and HSD to the Fuel Oil Injection Pumps of the Gas Turbines.
Naphtha and HSD shall be received to the site through Road Tankers.
Separate Fuel Unloading System for Naphtha and HSD are provided.
Two numbers Floating roof types tanks are provided for storage of the Naphtha, where as one number Fixed Roof type Tank is provided for Storage of HSD.
HIGH LIGHT POINTSSupply of Naphtha fuel from the storage tanks to
the Gas Turbine through three full capacity centrifugal forwarding pumps and a common supply line
To obtain constant pressure conditions at the Fuel Oil Injection Skid, a pressure sustaining station is provided downstream of the forwarding pumps.
Duplex filter is located downstream of the Naphtha forwarding pumps.
Return lines from the Gas Turbines are led to the Naphtha Storage Tanks.
HIGH LIGHT POINTSThe Gas Turbine is started with HSD whenever firing
with Naphtha is required. HSD is taken from storage tank and led to the gas turbine via the start-up pumps (HSD).
The Start-up line is also provided with a duplex filter and a pressure sustaining station.
When the Turbines have started, fuel supply is changed to Naphtha.
Return fuel is led to the Naphtha storage tanks to avoid contents of Naphtha in the HSD system.
HIGH LIGHT POINTSNaphtha supply system is to be purged with HSD for
safety reasons prior to Maintenance or repair works.
The Fuel unloading and forwarding system may be supplied Skid mounted on individual drain tanks .
Drains from the pump skids are collected in the drain tanks and can be pumped to the storage tanks through two Centrifugal pumps.
Two number sump pumps are to be provided in the Fuel Oil Pump
P&ID DIAGRAM FUEL OIL SYSTEM
NAPHTHA/HSD UNLOADING SYSTEM
Naphtha U/l bay
200micr. Filter 1/1
200micr. Filter 1/2
200micr. Filter 2/1
200micr. Filter 2/2
Naphtha U/P # 1
Naphtha U/P #2
Flow Miter
Flow Miter
HSD Tank200micr. Filter 1/1
Naphtha tank-1
Naphtha tank-2
HSD U/L Bay
HSD U/L PUMP
200micr. Filter 1/2
Unloading System Pumps DetailsMake : Sulzer Binghem Pump Inc.Type : CAP 8Number : 2 for Naphtha + 1 for HSDCapacity , M3 / Hr : 50
MOTORMake : Reliance ElectricKW : 11Voltage : 415 V 3 Ph. 50H
P&ID
Storage Tank DetailsFloating Roof Storage Tank of Naphtha Type :Double deck floating roof vertical
cylinder tank Number : TwoCapacity , KL : 8000Diameter , M : 32Height , M : 13Fixed Roof Storage Tank of HSDType :Fixed roof vertical cylinder tank.Number : OneCapacity , KL : 500Diameter , M : 10Height , M : 7.5
P&ID
NAPHTHA SYSTEM
D
DP filter10 MICRON 2/2
Naphtha Tank# 1
FWD PUMP#1
FWD Pump#2
FWD Pump#3
DP filter70MICRON 1/1
DP filter70MICRON 1/1
DP filter10 MICRON 1/1
DP filter10 MICRON ½
Naphtha Tank# 2
L/F for GT# 1A
L/F for GT# 1B
DP filter10 MICRON 2/1
HSD SYSTEM
HSD tank
FWD Pump#170Mic. filter 1/1
10Micr. filter 1/1
FWD Pump#2
Fuel injection system
Forwarding System Pumps Details
Make : Sulzer Binghem Pump Inc.Type : CAP 8Number : 3 for Naphtha + 2 for HSDRated Capacity , M3 / Hr : 110
MOTOR Make : Reliance ElectricKW : 56Voltage : 415 V 3 Ph. 50Hz
P&ID
Fuel Oil Injection Pump DetailsMake : Sulzer- Weise GermanyType : GSG 80- 260/13Stages : 13Fluid : HSD and NaphthaTemperature : < 80 degDish. Press. : 85 barCapacity : 69.8 CuM/Hr
MotorMake : SIEMENSType 1LA1450- 2KF70- ZRating : 500 KWVoltage : 6.6 KVCurrent : 51 A P&ID
LIQUID FUEL SUPPLY SYSTEM
Liquid fuel return Liquid Fuel supply
DUEL FUEL BURNER Liquid fuel return
Liquid fuel inlet
Water injection
Diffusion Gas inlet
Pilot Gas inlet
Ignition Gas inlet
Fuel Oil Supply Nozzle
LIQUIDE FUEL NOZZLELIQUIDE FUEL NOZZLE
Fuel Control System
Nox Control System
De Nox Pumps Details Make : KSB PUMPS LTD.Capacity : 50.4 CuM/hrHead : 402 MMotorMake : SIEMENSVoltage : 415 V, 50 Hz, 3 PHRating : 90 KWCurrent : 150 A
Drain Oil Pump DetailsMake : Kirloskar Brother Ltd.Type : Vertical CentrifugalNumber : 2 for Drain Tank- 1 + 1 Drain Tank- 1Capacity , M3 / Hr : 4
MOTOR Make : Bharat Bijlee Ltd.KW : 2.2Voltage : 415 V 3 Ph. 50HzFull Load Current : 4.5 A
Fire Fighting System
The Following Fire Fighting system is used in Fuel oil Storage System
Water Spray System Two Deluge valves are provided for Individual
Naphtha Tank surrounding area. One Deluge Valve is provided at HSD tank
surrounding area.
Foam system One individual Deluge valve is provided for Both
Naphtha and HSD tanks Roof area.
The Following Installations and Modifications are to be implemented at our Plant for Establishing Fuel Firing System.1.Installation of HSD Fuel Storage Tanks and Drain Oil Tanks.2.Unloading & Forwarding Systems arrangement.3.Fire Fighting system.4.Fuel Injection Skid and Injection Pump.5.Fuel firing system modification in Existing Diffusion & Premix Burners.6. Additional Modification of Liquid Fuel & DM water Control system in Hydraulic Skid.7. Modification of Control Logics in Existing DCS system.
ANY BODY MAY WELCOME TO SHARE THEIR KNOWLEDGE IN THIS SUBJECT ISSUE WITH PREVIOUS EXPERIENCE, IF ANY.
THANK YOU