Api Oil Water Separator Design

This chapter explains the applicability of the spcc rule to ows and clarifies the exemption for certain uses including equipment vessels and containers that are not specifically.

Api oil water separator design. Based on that design. Proper oil water separator design will allow for the removal and storage of accumulated oil and sludge from the separator to ensure that the accumulated products do not effect the operation of the separator. A diagram of a typical api separator is shown in figure 1 below adapted from api american petroleum institute 1990. The api oil water separator is a gravity separation device designed by using stokes law to define the rise velocity of oil droplets based on their density and size.

Api series oil water separators sizing spreadsheet below is a link to an api oil water separator sizing spreadsheet developed by hydro flo technologies. Description of the design and operation. 2 fuel oil at 40 f operating temperature. Api separators are designed to remove oil droplets with diameters as small as 0 015 cm 150 microns.

Api separators are extensively used in oil refineries and chemical processing facilities where waters containing relatively large amounts of oil are present and need to be processed to meet the requirements of npdes permits. Conventional oil water separators are rectangular devices in which wastewater flows lengthwise at a horizontal velocity v h. The flow capacities of the design are based on an influent of fresh water and no. Cod removals in the range of 16 to 45 and tss removals.

The spreadsheet operates on microsoft excel 2003 or later. By inputting the major design criteria you can solve for the separation chambers width to length to depth ratios. Api oil water separators the api separator design is based on the american petroleum institute api monographs on refinery environmental control design and operation of oil water separators. Api tanks see figure 33 1 and plate separators are the more efficient oil separators.

Chapter 5 oil water separators 5 1 introduction the intended use of an oil water separator s ows determines whether the separator is subject to the spcc regulations and if so what provisions are applicable. 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. Designed in accordance with api design criteria. The api oil water separator is a standard example of baffle type conventional oil water separators.

In addition api separators are designed to maintain laminar flow. Under most operating conditions the api separator will remove both free oil and suspended solids down to a concentration of between 50 and 200 mg l. Emulsifying agents detergents and soaps designed to remove oily grime from equipment vehicles or other components can adversely affect the operation of a gravity oil water separator. The design of the api oil water separator is based on the specific gravity difference between the oil and the wastewater because that difference is much smaller than the specific gravity difference between the suspended solids and water.