Pan Section Vapour Header and Pan vapour Line Dia with Online Calculator
In this article described about formulas for calculate Pan Section Vapour Header and Pan vapour Line Dia and also proved online calculator.
Pan Section Vapour Header Dia :
Required Data For Calculation:
a) Crushing Rate in TCH
b) A m/c % cane (To be taken percentage of massecuite boiled on that particular bleed vapour).
(For example while calculating the 2^{nd} bleed vapour header for pans , choose how may pans boiled on 2^{nd} vapour according to that consider the percentage of massecuite )
c) B m/c % cane (To be taken percentage of massecuite boiled on that particular bleed vapour).
(For example consider total B massecuite boiled on 3^{rd} vapour bleeding than calculating the 2^{nd} bleed vapour header for pans, choose percentage of massecuite is zero in calculator)
d) C m/c % cane (To be taken percentage of massecuite boiled on that particular bleed vapour).
e) Temperature of input vapour in ^{o}C
f) Velocity of inlet vapour in m/sec (Taken as per bleed vapour from evaporator body)
g) Specific steam consumption for A massecuite in ton of vapour per ton of m/c ( For A m/c it is having 0.4 to 0.55)
h) B massecuite Specific steam consumption in ton of vapour per ton of m/c ( For B m/c it is having 0.35 to 0.4)
i) Specific steam consumption for C massecuite in ton of vapour per ton of m/c ( For C m/c it is having 0.30 to 0.35)
j) Specific volume of vapour in M^{3}/kg ( Taken from Steam table for the particular temperature)
Formulas for calculation:
a) Vapour requirement for massecuite boiling in Ton/hr = ( TCH x massecuite % cane x Steam consumption of vapour)/100
b) Total vapour Requirement in T/hr = ( Vapour requirement for A m/c boiling + Vapour requirement for B m/c boiling + Vapour requirement for C m/c boiling )
c) Total vapour requirement to be covert into M^{3}/sec by the multiplying the specific volume of vapour
d) Dia of vapour Line header = SQRT [Volume of vapour / (0.785 x Velocity of vapour) ]
(SQRT – Square root)
Pan Vapour Inlet and Out Line Dia:
Required Data For Calculation:
a) Heating surface of the pan in m^{2}
b) Evaporation rate of the pan in Kg/ m^{2}/hr ( Take maximum value for calculating the vapour lines)
c) Pan Inlet Vapour Temperature in ^{o}C (Taken from evaporator bleed vapour temperature)
d) Pan Outlet Vapour Temperature in ^{o}C ( It is having 50^{o}C to 60^{o}C)
e) Inlet Vapour velocity of Pan in m/sec (Taken from evaporator bleed vapour velocity)
f) Pan Outlet Vapour Velocity in m/sec ( It is having 50 to 60 m/sec)
g) Specific volume of Pan inlet vapour ( Taken from Steam table for the particular temperature)
h) Specific volume of Pan Outlet vapour ( Taken from Steam table for the particular temperature)
As Per Hugot given Evaporation Rate of pans |
||||
Maximum | Minimum | |||
Kg/m^{2}/hr | Lb/Ft^{2}/hr | Kg/m^{2}/hr | Lb/Ft^{2}/hr | |
Footing | 85 | 17.5 | 17 | 3.5 |
A massecuite | 71 | 14.6 | 32 | 6.6 |
B massecuite | 46 | 9.4 | 11 | 2.2 |
C massecuite |
36 | 7.5 | 1.7 | 0.34 |
Formulas for calculation:
Volume of the vapour in M^{3}/sec = (Heating surface x evaporation rate of the pan x Specific volume of vapour /3600 )
Dia of vapour Line = SQRT [Volume of vapour / (0.785 x Velocity of vapour) ]
Pan Vapour Line Dia Online Calculator
Pan Section Vapour Header Online Calculator
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