Pan Section Vapour Header and Pan vapour Line Dia Calculation

Pan Section Vapour Header and Pan vapour Line Dia with Online Calculator

In this article given 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 in that particular bleed vapour).

(For example while calculating the 2nd bleed vapour header for pans , choose how may pans boiled in 2nd vapour according to that consider the percentage of massecuite )

c) B m/c % cane (To be taken percentage of  massecuite boiled in that particular bleed vapour).

(For example Consider total B massecuite to be boiled on 3rd vapour bleeding than calculating the 2nd 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 in that particular bleed vapour).

e) Temperature of input vapour in oC

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 0.5)

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 M3/kg ( Taken from Steam table for the particular temperature)

Formulas for calculation:

a) Vapour requirement m/c boiling in Ton/hr = ( TCH x m/c % 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 M3/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) ]

Pan Vapour Inlet and Out Line Dia:

Required Data For Calculation:

a) Heating surface of the pan in m2

b) Evaporation rate of the pan in Kg/ m2/hr ( Take maximum value for calculating the vapour lines)

c) Pan Inlet Vapour Temperature in oC (Taken from evaporator bleed vapour temperature)

d) Pan Outlet Vapour Temperature in oC ( It is having 50oC to 60oC)

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/m2/hr Lb/Ft2/hr Kg/m2/hr Lb/Ft2/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 M3/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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4 thoughts on “Pan Section Vapour Header and Pan vapour Line Dia Calculation”

sudhir Kumar Tripathi

(November 16, 2017 - 7:35 am)

Refinery clearification

BAL kishore

(December 1, 2017 - 1:12 pm)