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Procedure For burning Oil Presentation Transcript
1.PROCEDURE FOR BURNIG OIL
2.Burning of residual fuel in a furnace takes in a number of stages
Oil is first heated in a steam or in electric means to reduce the viscosity
So tat easy at pumping ,atomizing etc
Care must be taken to avoid overheating and cracking formation of carbon residues in the line and system
Oil is first heated in a steam or in electric means to reduce the viscosity
So tat easy at pumping ,atomizing etc
Care must be taken to avoid overheating and cracking formation of carbon residues in the line and system
3.Avoid gasification wch will give instability to the furnace
Heated oil is now passed throu the burner where it is atomized this process breaks it up in to a fine spray of droplets
So presenting very large surface area of oil admitted in to the furnace
Heated oil is now passed throu the burner where it is atomized this process breaks it up in to a fine spray of droplets
So presenting very large surface area of oil admitted in to the furnace
4.Droplets are of two types formed inside the furnance
Very fine particles consisting of the lighter fractions of the fuel which form a fine mist
Another form is slightly larger droplets formed by the heavier fractions of the residual fuel
Very fine particles consisting of the lighter fractions of the fuel which form a fine mist
Another form is slightly larger droplets formed by the heavier fractions of the residual fuel
5.The burner will also imparts the droplets using the rotational energy
Wen it leaves the burner fuel will be hallow in the shape of cone so that it is good for good combustion
Tis is the stage combustion will be commenced
In a furnace a type of combustion often referred to as a suspended flames
Wen it leaves the burner fuel will be hallow in the shape of cone so that it is good for good combustion
Tis is the stage combustion will be commenced
In a furnace a type of combustion often referred to as a suspended flames
6.For tis a stream of oil and air enters the combustion zone at the same rate at which the combustion products will leave the chamber
Combustion zone is dived in to two main regions as primary flame and secondary flame
Combustion zone is dived in to two main regions as primary flame and secondary flame
7.PRIMARY FLAME
8.For the oil to burn it must be raised to its ignition temperature where the continuous vaporization of the oil required for its combustion
Note tis temparature must not be confused with the flash point of the oil
Normally ignition temparature will be 20 c more tan tis flash point
8.For the oil to burn it must be raised to its ignition temperature where the continuous vaporization of the oil required for its combustion
Note tis temparature must not be confused with the flash point of the oil
Normally ignition temparature will be 20 c more tan tis flash point
9.Tis temparature cannot be obtained from the fuel heater
Tis heat will be obtained from the flame itself is utlized
As the cone of the atomized oil leaves the burner , the lighter hydrocarbons are rapidly raised its temp by the furnace flame heat
Tis heat will be obtained from the flame itself is utlized
As the cone of the atomized oil leaves the burner , the lighter hydrocarbons are rapidly raised its temp by the furnace flame heat
10.They then vaporize and burn to form a primary flame
The heat from this primary flame is now used to heat the heavier constituents of the fuel to their ignition temperature as they together with the incoming secondary combustion air pass through air
The stability of the furnace is largely depends upon this primary flames
The heat from this primary flame is now used to heat the heavier constituents of the fuel to their ignition temperature as they together with the incoming secondary combustion air pass through air
The stability of the furnace is largely depends upon this primary flames
11.A refractory is used around this flames to radiant the heat back to the furnace
If anything goes wrong tis air going for this secondary flames tat heavier particle won get burned and carbon residues will deposits on the quarrels
Another important factor to this primary flame is primary air must be well heated and must be clear at the right velocity
If anything goes wrong tis air going for this secondary flames tat heavier particle won get burned and carbon residues will deposits on the quarrels
Another important factor to this primary flame is primary air must be well heated and must be clear at the right velocity
12.Tis is the achieved by fitting vortices
This will good good mixing of air and the fuel and by reducing the forward speeds involved helps to maintain the primary flame within the refractory quarl.
This will good good mixing of air and the fuel and by reducing the forward speeds involved helps to maintain the primary flame within the refractory quarl.
13.SECONDARY FLAME
14.The large oil droplets heated in their passage throu the primary flame zone then vaporize and begin to burn
This is a rapid process even though not instantaneous and so it is essential that oxygen is supplied steadily and arranged to mix thoroughly with the burning particles of oil
15.If the air velocity is more and if travels tat is exceed that exceed the speed of the flame propagation
If it does the flame front moves further out in to the furnace and the primary flame will now burn outside the quarl
This is a rapid process even though not instantaneous and so it is essential that oxygen is supplied steadily and arranged to mix thoroughly with the burning particles of oil
15.If the air velocity is more and if travels tat is exceed that exceed the speed of the flame propagation
If it does the flame front moves further out in to the furnace and the primary flame will now burn outside the quarl
16.This secondary flame gives heat to the surrounding furnace for the generation of the steam
Sufficient time must be given for the complete combustion to take place before unburnt oil particles can impinge onto tubes or refractory materials
Sufficient time must be given for the complete combustion to take place before unburnt oil particles can impinge onto tubes or refractory materials
17.This usually entails the supply of a certain amount of the air in excess of the therotical amount required for the complete combustion
Actual amount of air required will be suplied tat deponds upon the number of furnance
If excess is supplied will increase deposits in the funnel
Actual amount of air required will be suplied tat deponds upon the number of furnance
If excess is supplied will increase deposits in the funnel
18.Also it will increase amount of sulphur trioxide that will form from sulphur trioxide in the pressence of excess oxygen.
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