Engineering-Stream - Software for Engineering Applications

Two Phase Separator Sizing - Vertical (Simpler Version) - UNDER TESTING


Step 1 - Input Process Conditions

   psig
   psia
   deg.F
   mmscfd
   lb/lbmol
  
   cP
   ft3/min
   lb/ft3
   cP
   min
   min
   lb/ft3
   lb/min
   ft3/min
   lb/ft3



Step 2 - Calculate K Value

   ft/s
   ft/s
   ft/s
   in
   in
   in



Step 3 - Check Inlet Velocity Head



   in
   in
   in
   ft/s
   lb/(ft*s2)
   lb/(ft*s2)
   in



Step 4 - Check Outlet Velocity Head



   in
   in
   in
   ft/s
   lb/(ft*s2)
   lb/(ft*s2)
   in



Step 5 - Set Levels and heights

   ft3
   ft3
   in
   in
   in
   in
   in
   in
   in
   in
   in
   in
   in
   in
   in



Step 6 - Final Design

Diameter of the vessel and Feed Nozzle

   in
   ft
  

Cumulative levels and heights from bottom seam (or tan)

   in
   in
   in
   in
   in
   in
   in
   in

Retention Volume and Retention Time

   in
   ft3
   min



Sketch

vertical separator


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General Notes:


Note: Refer to the "Terms and Conditions" in the 'About' section before using the software.

1) Two Phase Vertical Separator Sizing is a software program that can be used to size 2 phase vertical liquid / vapour (gas) separators.

2) The procedure is based on Chapter 7 - Separation Equipment, presented in GPSA 14th edition.

3) The separator in consideration is assumed to be equipped with a mist extractor. The software is not designed and hence should not be used for other types such as vane type separators. Heads on either ends of the shell are not considered for volume calculations such as surge volumes, retention volumes etc., for the sake of simplicity.

4) The user needs to select / fill in relevant input data under Step1' and then click 'Calculate1' button so the program calculates the relevant parameters. The user then needs to fill in relevant data under 'Step2' and click 'Calculate2' button and so on. The procedure needs to be followed sequentially. When an update to any input is made, the procedure needs to be followed sequentially again by clicking the buttons in sequence, so the calculations are updated under each step.

5) Typical control surge times (LLL to HLL) for liquids for various types of separator vessels are as below.
Compressor Drum : 2 minutes
Flash Drum : 2 - 5 minutes
Reflux Drum: 5 minutes on product plus reflux
Surge Drum upstream of a Tower: 5-10 minutes
Surge Drum upstream of a Fired heat: 10 minutes
Net Product to Storage: 5 minutes
Refrigeration Accumulator: 5 minutes, or based on system or storage requirements
Refrigeration Economizer: 3 minutes
Heat Medium Surge Drum: Maximum liquid expansion, based on 25% to 75% full

6) Typical retention times (empty to NLL) for liquids for various types of separator vessels as as below.
Amine Flash Drum : 5 - 10 minutes, depending on presence of hydrocarbons
Glycol Flash Drum : 10 - 20 minutes, depending on presence of hydrocarbons
Cold Separator: Gas / NGL / Ethylene Glycol : 15 - 30 minutes, depending on internals

7) Suggested mixed phase velocity head range for the inlet nozzle, J_Limit
Diffuser distributor: 4,000 - 6,000 max lb/ft • sec2
No inlet distributor : 650 - 1,500 max lb/ft • sec²
Inlet half pipe or elbow distributor: 1,000 - 2,500 max lb/ft • sec2
V-baffle or other simple invert diverter designs: 1,000 - 2,500 max lb/ft sec2
Cyclonic inlet device: upto 10,000 lb/ft • sec2
Suggested outlet velocity head range, J_Limit: 3000 - 3600 max lb/ft • sec2

8) All numbers / amounts need to be entered without commas or $ sign. Empty boxes, non-numerical values are not allowed where numbers are expected.

9) Please provide any constructive feedback so we can improve the quality of the software.