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Final Year Project Ideas & Abstracts / Mechanical Engineering Project Ideas & Abstracts / BOILER EFFICIENCY

BOILER EFFICIENCY
BOILER EFFICIENCY
CHECK THE UNBURNT IN FLY ASH SAMPLE TAKEN FROM THE FIRST HOPPER OF ESP/BF

AS PER THE DESIGNER IT SHALL NOT EXCEED 0.8%.
IF UNBURNT IN FLY ASH EXCEEDS 0.8% IT INDICATES INCOMPLETE COMBUSTION DUE TO LESS AMOUNT OF AIR
CHECK FOR O2 % AT THE APH FG INLET FOR 2.8%, INCREASE IF NECESSORY TO 3.2%. AGAIN CHECK FOR UNBURNTS IN FLY ASH. SIMULTANIOUSLY CHECK FOR AIR LEAKAGES/INGRESS IN THE SECOND PASS


Calculations of GCV 
As fired Basis
Coal sample is taken as received basis, heated for calculation of
A) Total Moisture content = TM%
 Air Dry Basis
The sample is air dried for removal of surface moisture and burned completely for
A) Inherent moisture content = M %
B) Ash percentage = A %

Weight of Dry Gas = (Ca+S/2.67-100*U)/(12*CO2out)
Ca = % Carbon in fuel (Ultimate Analysis as Fired)
S = % Sulfur in fuel (Ultimate Analysis as Fired)
A = % of Ash in fuel (Ultimate Analysis as Fired)
Unburned C in Ash = Pfa/100*Cfa + Pba/100*Cba
U = Carbon in ash / kg of fuel=A/100*Cash/(100-Cash)
CO2 Out = Avg. CO2 Flue Gas -APH Out
Sensible Heat Dry Gas = Wd*30.6(Tgo-Trai)


Attached File(s)
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