vertical kod1
DESCRIPTION
jogTRANSCRIPT
Vertical KO Drum Sizing (Ver 1.0.0)
1.0 Description
This program is useful for sizing a vertical KO drum, with or wothout a mist eliminato
2.0 Capabilities
2.1 User friendly: The program is prepared as a user friendly Excel Worksheet.
3.0 Limitations
1) This program is limited to Vertical KO drum sizing. Horizontal KO Drum cannot be
2) This program is formulated specifically for Vertical KO drums with or without (empty
KO drums with Vane Packs or Multi-cyclones as internals or for Filter separators or Cy
3) This program is restricted only to two phase (vapour-liquid only) separation calcul
It is not valid for liquid-liquid separation or for 3-phase separation.
4) This program uses only the Souders-Brown proportanality constant 'k' for sizing. I
minimum droplet size to be separated for sizing.
5) This program does not calculate the mesh size and diameter of the demister pad. O
General process duty (100 mm), and
High effieciency (150 mm)
are suggested for sizing.
6) Program does not calculate the pressure drop across the drum and the mesh, als
liquid/ vapor inlet, outlet nozzles.
4.0 Instructions
coloured cells are Input cells.
coloured cells are Output cells.
Following Procedure to be followed.
Step 1) Select the type of vertical KO drum - either Empty or with Demister pad - by
Program calculates the height of the drum accordingly.
Step 2) Select the type of separation efficiency desired (only for KO drum with m
Program selects 100 mm thick mist mat for General Process duty and
Step 3) Based on the gas and liquid flowrates, gas and liquid densities, the progr
indicated on tab 'k value'. The program then calculates the vessel diam
Step 4) Select Inlet nozzle size to obtain values as given below:
i) KO Drum with Mist Eliminator.
rVVV2 < 3750
rMVM2 < 1500
ii) Empty KO Drum.
rVVV2 < 3750
rMVM2 < 6000
rVVV2 < 3750
rMVM2 < 6000
Step 5) Select vapor outlet nozzle size such that.
I) rVVV2 < 3750 for vapor outlet nozzle.
Select liquid outlet nozzle size such that velocity through the nozzle do
Step 6) Program calculates the height of the vessel based on the following:
a) Height from mist Eliminator to top of Tan line h1 (mm) = 150 x dia (appl
b) Thickness of Mist Eliminator h2 (mm) = 100 (for General process duty
c) Height from top of Inlet Nozzle to Mist eliminator h3 (mm) = If 450 x
d) Height from high liquid level to Bottom of Inlet Nozzle h4 (mm) = If 300
e) High liquid level above the tan line (Input to the program).
5.0 References
5.1 H&G Separator sizing Manual M-22-14/1
nator.
t be sized using this program.
t (empty) a demister. It cannot be used for sizing of
eparators or Cyclones.
ulation.
ng. It does not take into account the
ter pad. Only two options viz:
h, also the entry/exit losses at the
ter pad - by selecting "Yes" or "No" in cell F28.
with mist eliminator). Click General process duty or High efficiencyin cell F-G 30.
and 150 mm mist mat for High efficiencies.
program finds the Souders-Brown constant (k) from the graph
diameter based on this.
e does not exceed 1m/sec.
dia (applicable only for KO Drum with Mist Eliminator).
duty) OR 150 (for High Efficiency).
450 x dia < 900, then 900 or else equal to 450 x dia.
= If 300 x dia < 300, then 300 or else equal to 300 x dia.
Vertical KO Drum Sizing (Ver 1.1.0)
Description of Program revisions
Old Version -
Change description Date
Ver. 1.0.0 (Basic Program) - Issued for Use 20.04.06
Equipment Data
Client : Client
Project : XXXX
Equipment Number : YYYY
Input data
Total vapor flowrate W : 50000 kg/hr
Flow margin : 25 %
Gas flowrate WV : 48500.0 kg/hr
Liquid flowrate WL : 1875.0 kg/hr
Density of gas rV : 6.4 kg/m³
Density of liquid rL : 890.00 kg/m³
Calculations
Density of mixture rM : 6.6455752 kg/m³
(WL/WV)*(rV/rL)^0.5 : 0.0032783
Souders Brown proportionality constant k : 0.0397113 m/s
Maximum allowable vapor velocity Vmax : 0.4666072 m/s
Vessel Design
Diameter of drum D : 2.6699418 m
Selected drum diameter D : 3.00 m
Mist eliminator required :
Type of Mist eliminator :
Height from top of inlet nozzle to top tan line : 2700.0 mm
Height from high liquid level to bottom : 900.0 mm
of inlet nozzle
High liquid level (above bottom tan line) : 500.0 mm
Inlet nozzle size INS 1 : 500.00 mm
Vapor velocity VVi : 13.401 m/s
Liquid velocity LVi : 0.0037 m/s
Mixture velocity : 13.405 m/s
rVVV2 : 1149.3671 kg/m s²
rMVM2 : 1194.1332 kg/m s²
Tan to tan length of vessel TL : 4.6 m
Vapor outlet nozzle size INS 2 : 400.00 mm
Vapor velocity VVii : 20.939 m/s
rVVV2 : 2806.0719 kg/m s²
Liquid outlet nozzle size : 32 mm
Liquid out velocity LVii : 0.9095549 m/s
Revision
Date
Made By
Checked By
Approved By
SIZING OF VERTCAL KNOCK-OUT DRUM (Ver 1.1.0)
Page 6 of 21 Printed at 17:58 3/8/2004
DO NOT DELETE!!
(WL/WV)*(rV/rL)^0.5: 0.00328 3 4
(Input) 0.0030 0.0033
0.0360 0.0400
Souders Brown const (k): 0.03971
(Output)
Refer Figure 4, H&G standard M-22-14/1
Item No: 1 2 3 4 5 6
(WL/WV)*(rV/rL)^0.5 0.0024 0.0026 0.0030 0.0033 0.0040 0.0042
Souders Brown const (k) 0.0280 0.0303 0.0360 0.0400 0.0480 0.0500
Item No: 1 2 3 4 5 6
,0100000
,100000
1,00000
So
ud
ers
Bro
wn
co
ns
t, k
(m
/s)
Empty Drums - Allowable VH&G Standard M-22
,0010000 ,0010000 ,0100000 ,100000
So
ud
(WL/WV)*(rV r
7 8 9 10 11 12 13 14 15 16
0.0050 0.0052 0.0060 0.0062 0.0070 0.0076 0.0080 0.0090 0.0095 0.0100
0.0585 0.0600 0.0685 0.0700 0.0745 0.0800 0.0815 0.0880 0.0900 0.0930
7 8 9 10 11 12 13 14 15 16
le Vapour Velocity -22-14/1
0000 1,00000 10,00000
rV/rL)^0.5
17 18 19 20 21 22 23 24 25 26
0.0118 0.0160 0.0200 0.0250 0.0300 0.0350 0.0400 0.0500 0.0600 0.0700
0.1000 0.1100 0.1200 0.1250 0.1280 0.1300 0.1320 0.1320 0.1300 0.1295
17 18 19 20 21 22 23 24 25 26
27 28 29 30 31 32 33 34 35 36
0.0800 0.0900 0.1000 0.1500 0.2000 0.2500 0.3000 0.4000 0.5000 0.6000
0.1290 0.1285 0.1250 0.1170 0.1100 0.1000 0.0930 0.0800 0.0720 0.0650
27 28 29 30 31 32 33 34 35 36
37 38 39 40 41 42 43 44 45 46
0.6750 0.7000 0.8000 0.8700 0.9000 1.0000 1.1200 1.5500 2.0000 2.2500
0.0600 0.0585 0.0530 0.0500 0.0485 0.0445 0.0400 0.0300 0.0230 0.0200
37 38 39 40 41 42 43 44 45 46
47 48 49 50 51 52 53 54 55 56
3.0000 3.8500 4.0000 4.2000 4.5000 5.0000 5.3000 6.0000 6.6600 7.0000
0.0150 0.0100 0.0096 0.0090 0.0080 0.0066 0.0060 0.0050 0.0040 0.0037
47 48 49 50 51 52 53 54 55 56
57
8.0000
0.0030
57
Equations for Vertical KO Drum Sizing using M-22-14/1
Eq 1
Eq 2
Eq 3 where FM is the Flow M
Eq 4 Inlet Vapor Velocity:-
Eq 5 Inlet Liquid Velocity:-
Eq 6 Mixture Velocity:-
Eq 7 Tan to Tan length:-
(For Empty KO Drum)
Eq 8 Tan to Tan length:-
(For Demister type KO Drum)
Eq 9 Outlet Vapor Velocity:-
Eq 10 Outlet Liquid Velocity:-
VVLkXV rrr /)(((max)
2100013600/4100/1 INSFMWVvi VV r
100013600/4100/1 INSLFMWLLvi r
2100023600/4100/1 INSFMWVvii VV r
100023600/4100/1 INSLFMWLLvi r
LviVvi
)5.0max)^3600/())100/(1((( VmFMWd r
))/()//(()( vWvlWlWvWlm rrr
1000/)154321( INShhhhhLT
1000/)1543( INShhhLT
ow Margin in percentage.
Where INS1 is the Inlet Nozzle Size in mm.
Where INS1 is the Inlet Nozzle Size in mm.
where INS 2 is vapor outlet nozzle size in mm.
where INS 2 is liquid outlet nozzle size in mm.
2 r
21000 r