Below is a link to an API oil water separator sizing spreadsheet developed by Hydro-Flo Technologies.
By inputting the major design criteria, you can solve for the separation chambers width to length to depth ratios.
The spreadsheet operates on Microsoft Excel 2003 or later.
Below is a sample shot of the spreadsheet.
|Hydro-Flo Technologies, Inc.|
|The Art and Science... of Wastewater Treatment|
|API Separator Calculations|
|USER INPUT IN YELLOW|
|Design Flow rate (in gpm)||250|
|Temperature (in deg F)||60|
|Specific Gravity of the Oil (in g/cm3)||0.850|
|Oil Droplet size (in microns)||150|
|Density of the Water (in g/cm3)||0.99890|
|Viscosity (in Poise)||0.01129|
|For more detailed information go to www.HydroFloTech.com|
|Width of separator in feet||6.500|
|Depth of separator in feet||2.500|
|Length of separator in feet||32.500|
|Oil Droplet (in cm)||0.015|
|Call 630-762-0380 to talk to a Hydro-Flo application engineer|
|Minimum Allowable Result||Design||Maximum Allowable Result|
|terminal velocity (in cm/s)||0.162||0.162||0.162|
|terminal velocity (in ft/min)||0.318||0.318||0.318|
|Minimum cross sectional area needed (in ft)||11.139||11.139||11.139|
|Cross Sectional Area (in square feet)||11.139||16.250||160.000|
|maximum horizontal velocity (15*vt, but must be <=3)||3.000||3.000||3.000|
|horizontal velocity (in ft/min)||3.000||2.057||0.209|
|Length of unit (must be at least 5X of width) (in ft)||5.000||32.500||100.000|
|minimum horizontal area||156.527||146.444||125.341|
|Width of channel (in feet) (must be 6 to 20)||1.000||6.500||20.000|
|Depth/Width Ratio (must be .3 to .5)||0.300||0.385||0.500|