PPT ON FUEL OIL SYSTEM

PPT On FUEL OIL SYSTEM
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FUEL OIL SYSTEM Presentation Transcript:

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

2. Use of different types
LDO & HSD normally used in
Auxiliary boiler
Ignitor for certain boiler design.
HFO generally used for power boiler

3. Fuel Oil:
Three Liquid Fuel used in power plant
1.Heavy Fuel Oil(HFO)
2.LSHS(Light sulphur Heavy stock)
3.HSD(High speed diesel)
Oil firing is preceded by:
1.Lowering viscosity and increasing flowability on heating for better combustion
2.Droplet formation on atomization
3.Combustion initiation by High energy spark ignition.

4. FUEL OIL SYSTEM:
Purpose: To establish initial Boiler Light up.
To support the Furnace flame during Low Load Operation
FUEL OIL SYSTEM CONSISTS OF:
Unloading of fuel oil and storage system
Transfer of fuel oil to pressurising pump house
Drain oil system
Aux steam & condensate system
Electrical Tape tracing system:
Instrumentation & control system
Oil water separator system.

5. FO unloading system
Heavy oil is received at the site in railway tankers of 20 tonne capacity each
An 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.

6. UNLOADING OF F.O AND STORAGE SYSTEM
The Fuel oil is supplied by railway wagons. The installation has been Provided for unloading 76 wagons simultaneously.For this purpose one Number unloading header of size 400 NB have been laid between two Railway tracks with 84 nos. 80 NB branches with plug valves which Surve as unloading points.400 NB branch is taken from the unloading Header to the pump house which surves as the suction header for 5 nos. Unloading cum transfer pump.4 nos. pumps is used for unloading and I number as stand by.Each pump is 100 cm3 per hour capacity.
At suction side of each pump simplex busket type strainer with 40 mesh Straining element is provided to make the oil free from foreign particles Which may cause damage to pump rotor.
For storing the unloaded oils 3 nos. vertical cylinder,fixed roof vented Type storage tank of nominal capacity 2826 cum has been stalled.

7. TRANSFER SYSTEM:
Oil from any of the 3 storage tanks can be transferred to the pressurising Pump house by gravity through 200 NB transfer header.It is also possibl To transfer oil from one storage tank to another , and for this purpose 200 Nb branch connection is taken from each section of transfer line of Each storage tank and a 350 NB common recirculation line is installed. Oil through this recirculation line would flow to suction header of un- Loading pumps and through the pump oil can be taken to any desired Storage tank by opening the desired inlet vv of storage tank.

8. For more please refer our PPT. Thank You.

Source: Power Point Presentations

PPT ON FUEL SYSTEM

PPT On Fuel System

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Fuel System Presentation Transcript:

1. Presentation Plan
Fuel oil System
Oil burners
Coal mills and feeder
Types of feeders
Classification of Mills
Features of different Mills
Burner arrangement

2. Fuel oil System
Purpose: (a) to establish initial boiler light up. (b) to support the furnace flame during low load operation. Fuel oil system Consists of Fuel oil Pumps Oil heaters Filters Steam tracing lines
Objective is to get filtered oil at correct pressure and temperature

3. Atomization
Atomization breaks the fuel into fine particles that readily mixes with the air for combustion. Oil should be divided up into small particles for effective atomization. The advantages of atomization are:
a) Atomizing burners can be used with heavier grades of oil.
b) Can be adopted to large applications because of large capacity range.
c) Complete combustion is assured by the ability of the small particles to penetrate turbulent combustion.

4. Classification: Oil burners
Oil burners are classified according to the method used for atomization, as follows:
a) Air-atomized burners
b) Steam-atomized burners
c) Mechanically atomized burners
Air atomizing system are not recommended for heavy oil system as they tend to chill the oil and decrease atomization quality

5. Steam Atomization
This System uses auxiliary steam to assist in the atomization of the oil. The steam used in this method should be slightly superheated and free cf moisture. As in the air atomizing system, the steam used for atomizing as well as heating the fuel as it pass through the tip and into the furnace. The main advantages of steam atomizing burners over other are:
a) Simplicity of its design
b) Initial cost of installation is low
c) low pumping pressure
d) low preheating temperature.
Disadvantage is steam used in atomizing process

6. Oil Burners
The types of oil used in the oil burners are:
a) Light Diesel Oil
b) Heavyfuel oil
c) Low sulpher heavy stock (LSHS).
Heavy oil guns are used for stabilizing flame at low load carrying. Warm up oil guns are used for cold boiler warm up during cold start up and ignitor are used for start up and oil flame stabilizing.

7. Oil Guns
The guns used in this system have two main components for atomization. They are:
a) Mixing plate
b) Spray Plate.

8. Features of Bowl Mills
Grinding chamber
Classifier mounted above it
Pulverization takes place in rotating bowl
Rolls rotating free on journal do the crushing
Heavy springs provide the pressure between the coal and the rolls
Rolls do not touch the grinding rings
Tramp iron and foreign material discharged.

9. For more please refer our PPT. Thank You.

Source: Power Point Presentations