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