Fuel Oil System

M. Nageswar Rao, Sr.Mgr.(EMD)

Date: 09.10.2015Venue: EDC, Simhadri

Presentation layout

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Purpose of Fuel OilInitial firing of the Boilers

Flame stabilization

Low load operation

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Types Of Fuel Oil Light diesel oil (LDO)High speed diesel oil (HSD)Heavy Furnace oil (HFO)Low sulphur heavy stock (LSHS)

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Use of different types LDO & HSD normally used in

Auxiliary boilerIgnitor for certain boiler design.

HFO generally used for power boiler

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TYPICAL HFO SPECIFICATIONSStandard : IS 1593 / 1971, Grades

LV- MV-HVFlash point : 660C (minimum)Viscosity (Max.) : 80-120-370 CST at 500CGross heating value : 10270 Kcal/kgTotal Sulphur (Max.) : 3.5-4-4.5%by weight

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Presentation OutlineFO unloading systemFO storageFO pressuring pump houseSafety procedure in FO handling

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FO unloading systemHeavy oil is received at the site in railway

tankers of 20 tonne capacity eachAn unloading header with number of receiving

points for number of wagons unloading is provided.

The connections between loading header and tankers are through rubber flexible hosepipes.

Railway tankers are equipped with steam heating coils.

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Transfer P/P

Strainers

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HEATER

SteamR/C

O/L

I/L

FILLING HDR

Suction HDR

Return Hdr

Return oilFrom Unit

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Suction Header Return Header

Recirculation P/P

OILTANK

OILTANK

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Flash Tank

Return SteamFrom Heater

Steam to Atmosphere

Water to Sump Pit

Sump Pump

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DRAINHDR

DrainTank

Drain Oil p/pOilTank

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HOTV

HORV

CVOil Guns

Thank you all

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