Api Oil Water Separator Sizing

When sizing an ows there are three primary factors to consider.

Api oil water separator sizing.

Oil droplets 150 microns in diameter and larger. Following are the definitions and categories of different oil droplet sizes as defined by the american petroleum institute in the mid 1970 s. The api type design relies on a large water volume. See figure 5 33 and figure 5 34.

Oil water separator oil droplet sizes definitions and meanings. Forebay separator section and the. This correlates to a tank size that can be 5 times the size of an equally sized coalescing separator. The information contained herein is the opinion of highland tank.

The api type design relies on a large water volume. Oil droplets from 20 to 150 microns in diameter. Below is a link to an api oil water separator sizing spreadsheet developed by hydro flo technologies. 33 1 2 types of separator api tanks see figure 33 1 and plate separators are the more efficient oil separators.

This guide is intended to assist knowledgeable personnel with sizing a highland tank oil water separator. Must be 3fpm note. 0 9860 density of the water s g g cm3 0 0052 viscosity in poise 1 2568 rise rate of oil droplet gpm ft2 calculated 159 13 horizontal surface area area ft2 of the separator needed to achieve desired oil removal performance 0 89 cross sectional velocity ft min. By inputting the major design criteria you can solve for the separation chambers width to length to depth ratios.

This design also known as an api separator generally provides a discharge oil concentration of 100 ppm based on a 150 micron droplet size. The spreadsheet operates on microsoft excel 2003 or later. Oil water separator sizing calculation. Oil water separators are typically the american petroleum institute api also called baffle type american petroleum institute 1990 or the coalescing plate cp type using a gravity mechanism for separation.

This calculation is based on the methods proposed. An api oil water separator is a device designed to separate gross amounts of oil and suspended solids from the wastewater effluents of oil refineries petrochemical plants chemical plants natural gas processing plants and other industrial oily water sources. This correlates to a tank size that can be 5 times the size of an equally sized coalescing separator. Sizing ows calculation per api 421 xls author.

Oil water separators typically consist of three bays. Below is a sample shot of the spreadsheet. 8 16 2016 5 28 46 pm. Api tanks were originally designed by the american petroleum institute api for use in refinery applications but modifications of the design can be used for stormwater treatment.