PROJNo.:__________
CALC No.:_________
Self Chck:__________
Date:________
Chkd:________
Apprvd:________
Date:________ Date:________
INTRODUCTION TO HORIZONTAL VESSEL SIZING PROGRAM
Program Name #REF!
Version
#REF!
Revision
#REF!
Author
R Aspinall
Date
#REF!
CLICK ON HIGHLIGHTED BUTTONS
Purpose
This program is designed to assist with sizing of 2 phase and 3 phase horizontal separators.
This program is based on the guidelines for horizontal separators in API 12J
Level Control Guidelines
The following liquid levels are offered only as an approximate guide.
Where project specific level control data is available, the following may be ignored.
For explanation of liquid levels click on boxes highlighted in yellow.
Instructions for use
1.
-
Input required process data in the 'Data Input' sheet:
Fluid Mass Flowrates & Densities
Oil Viscosity
Separator operating pressure
Separator Type - ie 2 or 3 phase
Separation Device
Vessel Aspect Ratio (Length/ Diameter)
Level constraints (See diagrams opposite For Guidelines)
There are 2 options for entering liquid level constraints:
1) Default level constraints may be chosen by clicking on the 'Default Level Constraints' button
2) User specified level constraints may be entered directly
- Required Oil & Water or liquid (for 2 phase separators) Residence Times
- Max allowable rhov2 for inlet/ vapour outlet nozzles and max allowable velocity for liquid outlet nozzle
3 Phase Separator
0.3D or 300mm min
HHLL
LLL
LLLL
Settling Height for light
phase or 300mm min
3. Input an initial guess for the vessel diameter based on the estimated diameter and
enter maximum interface and liquid levels as a percentage of the vessel diameter.
D
HIL
Weir
LIL
6 minute heavy phase
holdup or 300mm min
Water Nozzle
150mm from
vessel base
2. Goto the 'Calculations (1)' sheet by clicking on the button at the bottom of 'Data Input Sheet'
1 - 5 minute holdup light
phase or 250mm min
HLL
LLIL
Dead Oil Length
1 minute holdup
or 350mm min
T/T Length
Separation Length
4. Hit the 'Execute Program' button and check residence times to see if requirements are met.
( Note1: the calculated default liquid levels are based on the user input level constraints)
( Note2: the program will give a warning if input dia is too small (based on user input level constraints))
5. If either the API criteria or other criteria is not met adjust dia and/ or maximum Oil/ Interface levels
and rerun program
1. When actual liquid levels are known, these may be entered by clicking on
the 'enter liquid levels' button in the 'Data Input' sheet. This will take the user to
the main calculation sheet and the liquid levels can be entered in the highlighted cells.
Once these are entered, go back to the Data Input Sheet and complete input.
Goto 'Calculations (1) sheet' and enter the vessel diameter. There is no need to execute
the program since this calculates liquid levels based on the level constraints.
2. The water outlet nozzle is fixed @ 150mm above the vessel base. This may be adjusted to a
user preferred value by overwriting the default value in 'calculations(2)' worksheet
Limitations
1. Does not take into account vessel heads therefore the separation volume used in calculations is conservative
2 Phase Separator
0.3D or 300mm min
HHLL
1 minute holdup
or 250mm min
1 min holdup
1 minute holdup
or 300mm min
Water Nozzle
150mm from
vessel base
HLL
LLL
D
LLLL
T/T Length
FEEDBACK: All feedback should be sent to the Owner (Assigned Custodian): - see Revision Status sht.
397539096.xls - Introduction
Page 1 of 8
09/20/2018
PROJNo.:__________
CALC No.:_________
Self Chck:__________
Date:________
INPUT
DATA
Chkd:________
Apprvd:________
Date:________ Date:________
SHEET
Client:
Job No:
Project:
Vessel Name:
Tag No:
Case:
PROCESS DATA
Operating Pressure
Oil Mass Flowrate
(bara)
(kg/h)
65
0
Oil Viscosity
Oil Density
(cP)
(kg/m3)
0.07
428.00
Gas Mass Flowrate
(Kg/h)
31,143
Gas Density
(kg/m3)
76.25
Water Mass Flowrate (kg/h)
0
Water Density (kg/m3)
1000.00
SEPARATION
2 or 3 Phase
22
Gas-Liquid
Separation Device
Wiremesh Demister
Aspect Ratio (L/D)
K-Value (m/s)
User Input
2 Phase Separator
Default
0.107
Wiremesh Demister
(Optional) Selected
0.11
0.107
3.0
CONSTRAINTS
Liquid Levels From to…
Min height
(mm)
150
*Water outlet nozzle to LILL or LLLL
Interface low-low to interface low (LLIL to LIL)
interface low to interface high (LIL to HIL)
Interface High (HIL) to Weir
Min Time
(secs)
30
N/A
Weir to Oil Low Low (LLLL)
Oil low low to oil low (LLLL to LLL)
Oil low to oil high (LLL to HLL)
Oil high to oil high high (HLL to HHLL)
150
150
250
N/A
30
60
60
Min. holdup time for oil downstream of Weir to prevent gas blowby
(Required for dead oil length calc)
Minimum Residence/ Holdup Times
Oil Residence Time (minutes)
Water Residence Time (minutes)
2 Phase Liquid Holdup Time (minutes)
1
1
(Not Required)
(Not Required)
*(level to LILL for 3 phase separator or LLLL for 2 phase separator)
NOZZLE DATA
*Inlet Nozzle - max allowable rhov2 (kg/ms2)
Vapour Outlet Nozzle - max allowable rhov2 (kg/ms2)
Liquid Outlet nozzle - max allowable velocity (m/s)
DEFAUL
T
6000
3750
1
*For no separation device max allowable rhov2 = 1000
397539096.xls - Data Input
Page 2 of 8
09/20/2018
PROJNo.:__________
CALC No.:_________
Self Chck:__________
Date:________
CALCULATION
Client:
Job No:
Project:
0
0
0
Vessel Name:
Tag No:
Case:
0
0
0
Chkd:________
Apprvd:________
Date:________ Date:________
SHEET
Vessel Sizing Variables
Estimated Vessel Diameter
User Selected Vessel Diameter
Dead Oil Length
Vessel Separation Length
1
(mm)
(mm)
(mm)
(mm)
0
1100
0
3300
Maximum Liquid Levels
Max Liq Level (HHLL) as a percentage of vessel diam. (%)
Max interface level (HIL) as a percent of vessel diam. (%)
Residence Times:
70
28 Not Required
Calculated
Oil Residence Time (NIL to NLL)
Water Residence Time (Bot to NIL)
Total Liquid Residence Time (Bot to NLL)
(To NLL for 2 phase separator only)
(min)
(min)
(min)
N/A
N/A
#DIV/0!
API 12 J Recommended
(min)
1.00
2 phase
(m3)
1
User Specified
N/A
N/A
0
Slug Handling Capacity
From NLL to HHLL
Note 1: A good starting point is 40% for HIL and 60% for HHLL
397539096.xls - Calculations (1)
Page 3 of 8
09/20/2018
PROJNo.:__________
CALC No.:_________
Self Chck:__________
Date:________
RESULTS
Project Details
Client:
Job No:
Project:
Chkd:________
Apprvd:________
Date:________ Date:________
SUMMARY
Sizing Case
0
0
0
Vessel Name:
Tag No:
Case:
0
0
0
Process Input Data
Operating Pressure
Oil Mass Flowrate
(Bara)
(kg/h)
65
0
Gas Mass Flowrate
Water Mass Flowrate
(kg/h)
(kg/h)
31,143
0
Oil Viscosity
Oil Density
(cP)
(kg/m3)
0.07
428.00
Gas Density
Water Density
(kg/m3)
(kg/m3)
76.25
1000.00
Results
Vessel Dimensions
Diameter
Length T/T
(m)
(m)
1.1
3.3
Residence Time
Total Liquid
Water
(min)
(min)
#DIV/0!
N/A
Gas Velocities
Allowable
Actual
(m/s)
(m/s)
#DIV/0!
0.47
Liquid Levels
High
Normal
Interface High
Interface Normal
70%
40%
N/A
N/A
Inlet
Gas Outlet
Oil & Water Outlet
(ins)
(ins)
(ins)
Nozzles
(Above HHLL)
(%
(%
(%
(%
Vessel
Vessel
Vessel
Vessel
Diameter)
Diameter)
Diameter)
Diameter)
calculated
5.7
5.7
0.0
selected
6
6
#N/A
#N/A
3 PHASE SEPARATOR
INLET
High High Liquid Level
High Liquid Level
Normal Liquid Level
Low Liquid Level
Low Low liquid level
Weir Height
High Interface Level
Normal Interface Level
Low Interface Level
Low Low Interface Level
Bottom of Vessel
Level (mm)
#VALUE!
#VALUE!
#VALUE!
#VALUE!
#VALUE!
#VALUE!
#VALUE!
#VALUE!
#VALUE!
#VALUE!
0
HHLL
HLL
NLL
LLL
LLLL
HIL
NIL
LIL
LLIL
BV
N/A m TAN/TAN
___
___
___
___
___
___
___
___
___
___
___
N/A m ID
Water
397539096.xls - Report
GAS OUTLET
Page 4 of 8
Oil
N/A m
Dead Oil Length
09/20/2018
PROJNo.:__________
CALC No.:_________
Self Chck:__________
Date:________
HORIZONTAL
Client
Job No
Project
VESSEL
SIZING
0
0
0
Chkd:________
Apprvd:________
Date:________ Date:________
ROUTINES
Vessel Name
Tag No
Case
0
0
0
PROCESS DATA
Oil
Gas
Water
Mass Flowrate
Density @ operating conditions
(kg/h)
(kg/m3)
0
428
31,143
76.25
Volume flowrate
(am3/h)
0.0
408.4
Dynamic viscosity
Kinematic viscosity
(cP)
(m2/sec)
0
1000
0.0
0.1
1.7E-7
2 Phase Separator Dimensions
calculated vessel diameter (mm)
user selected vessel diameter
vessel separation length (mm)
dead oil length (mm)
2 or 3 phase separation
0 (ESTIMATE)
1100
3300
cross section (m2)
radius (mm) :
0.95
550
2
heights above bottom (mm)
Default
Heights
User Input
Interface Levels
2
minimum allowable nozzle
water outlet nozzle
interface low-low (LLIL)
interface low (LIL)
interface normal (NIL)
interface high (HIL)
weir height
Light Phase Levels
oil low-low (LLLL)
oil low (LLL)
oil normal (NLL)
oil high (HLL)
oil high-high (HHLL)
:
220
370
520
gas cap height
Space
(mm)
1
Time Gap
(sec)
Selected
129
150
0
0
0
0
0
n/a
n/a
n/a
n/a
n/a
n/a
n/a
n/a
n/a
n/a
n/a
220
370
445
520
770
220
150
75
75
250
#DIV/0!
#DIV/0!
#DIV/0!
#DIV/0!
#DIV/0!
330
Note 1: The selected levels are the DEFAULT levels or where a value is entered by the user, the user input value will be used
Note 2: Minimum allowable nozzle height limited by 50 deg entry angle to vessel shell.
397539096.xls - Calculations (2)
Page 5 of 8
09/20/2018
PROJNo.:__________
CALC No.:_________
Self Chck:__________
Date:________
Chkd:________
Apprvd:________
Date:________ Date:________
API SIZING CRITERIA
Oil gravity
Min residence time (API Criterion)
=
=
199.1 API
1 mins 2 phase
oil residence time nil-nll (mins)=
Total Liquid Residence Time (mins)=
water res. time nil-outlet (mins)=
#DIV/0!
#DIV/0!
#DIV/0!
alowable gas vel -API-(m/s) =
K-Value for Wiremesh Demister
actual gas velocity (m/s)
- above nl
- above hll
- above hhll
#DIV/0!
0.35 (ft/s)
=
=
=
time to overflow above hhl (sec)=
0.192
0.223
0.473
User Selected
#DIV/0!
#DIV/0!
#DIV/0!
#DIV/0!
NOZZLES
Minimum inlet diam.
Min gas outlet diam.
Minumum liquid outlet
Minumum liquid outlet
Minumum liquid outlet
397539096.xls - Calculations (2)
5.7
5.7
0.0
0.0
0.0
ins
ins
ins
ins
ins
i.d.
i.d.
(oil + water)
(oil only)
(water only)
Page 6 of 8
09/20/2018
Drawings
Client:
Job No:
Project:
0
0
0
Vessel Name:
Tag No:
Case:
0
0
0
3 PHASE SEPARATOR
INLET
High High Liquid Level
High Liquid Level
Normal Liquid Level
Low Liquid Level
Low Low liquid level
Weir Height
High Interface Level
Normal Interface Level
Low Interface Level
Low Low Interface Level
Bottom of Vessel
Level (mm)
#VALUE! HHLL
#VALUE! HLL
#VALUE! NLL
#VALUE! LLL
#VALUE! LLLL
#VALUE!
#VALUE! HIL
#VALUE! NIL
#VALUE! LIL
#VALUE! LLIL
0
BV
N/A m TAN/TAN
GAS OUTLET
___
___
___
___
___
___
___
___
___
___
___
N/A m ID
Water
N/A m
Dead Oil Length
Oil
PROJNo.:__________
CALC No.:_________
Self Chck:__________
Date:________
HORIZONTAL
VESSEL
VESSEL NUMBER
CASE DESCRIPTION
SIZING
Chkd:________
Apprvd:________
Date:________ Date:________
ROUTINES
SLEIPNER LP SEPARATOR
NEW GUNGNE CASE DATA WITH 3MSM3/D LP PRODUCTION
oil rate (kg/h)
gas rate (kg/h)
water rate (kg/h)
2 or 3 phase separation
:
:
:
:
1240
24167
100
2
vessel diameter (mm)
vessel separation length (mm):
dead oil length (mm)
:
5000 oil viscosity (cP)
:
5000 oil viscosity (m2/sec) :
971
space
time
heights
(mm)
gap
(sec)
585
150
n/a
1564
n/a
n/a
1714
n/a
n/a
1864
n/a
n/a
2014
n/a
n/a
2114
n/a
n/a
:
heights above bottom (mm)
minimum allowable nozzle
water outlet nozzle
interface low-low
interface low
interface normal
interface high
weir height
: note 1
:
:
:
:
:
:
oil low-low (LLL)
oil low (LL)
oil normal (NL)
oil high (HL)
oil high-high (HHL)
s cap height
:
:
:
:
:
:
795
97.4
1034
oil density (kg/m3) :
gas density (kg/m3) :
water dens. (kg/m3) :
2630
2780
2855
2930
3180
1820
2630
150
75
75
250
API SIZING CRITERIA
0.2
2.0E-7
oil vol (m3/h)
gas vol (m3/h)
wat vol (m3/h)
:
:
cross section (m2)
135831 - above oil outlet
9698
4827
4806
15809
64% of vessel diam.
1.6 Liquid rate (kg/h)
248.1 Tot liq vol (m3/h) :
0.1 mix liq dens
:
:
19.64 radius
1340
1.7
###
###
- CHECK - 50% MAX FOR VANES, 60% FOR MISTMAT
- OK
SHELL DEP 31.22.05.11-Gen February 1991 SIZING CRITERIA
Oil gravity
Min residence time (API Criterion)
=
=
oil residence time nil-nl (mins)
=
water res. time nil-outlet (sec)=
=
alowable gas vel - API - (m/s)
=
=
actual gas velocity (m/s)
- above nl
- above hl
- above hhl
=
=
=
time to overflow above hhl (sec)=
NOTE - minimum allowable nozzle height limited
by 50 deg entry angle to vessel shell.
46.5 API
3 mins3 Phase
945.2 OK
1209870
0.430
0.009 - OK
0.009 - OK
0.011 - OK
83829
Feed flow parameter
=
0.019
Gas Demisting:
Scaled gas flow, Q*
Design flow multiplier
Design gas flow, Q*max
Slugging service? (y/n)
=
=
=
0.026 m3/sec
1.3
0.033 m3/sec
n
Q*max/A (above NL)
Q*max/A (above HL)
Q*max/A (above HHL)
Allowable m/s
=
=
=
=
0.004 m/sec 0.004 m/sec 0.005 m/sec -
Liquid Handling:
Diam req for degassing
Diam req for defoaming
=
=
1 mm
11 mm
OK
OK
Control vol (LL to HL)
Min recommended
=
=
160.5 min 2.0 min
OK
Slug capacity (NL to HHL)
Full feed pipe
=
=
9.5 m3
136.7 secs (2-5 normal)
VANES
OK
OK
OK
0.150
WIREMESH
OK
OK
OK
0.089
Nozzles:
Minimum inlet diameter
Minimum gas outlet diam.
Minumum liquid outlet
Minumum liquid outlet
HSEP, Version 2, Revision 0
397539096.xlsoriginal
Page 8 of 8
=
=
=
=
4.7
4.7
1.0
0.9
ins
ins
ins
ins
i.d.
OK - ADEQUATE SPACE FOR SCHOEPENTOETER
i.d.
(oil + water)
(oil only)
09/20/2018