API-421
The API-421 uses a variety of innovative technology (such as velocity-Head Diffusers, Reaction-Jets, Flight Rake System, Corrugated Plate Packs, Oil-Skimming Devices, etc.) to remove oil from wastewater onshore.
API-421 SKIMMER
The ESI API-421 Separator is a gravity-type oil-water separator designed for use in petroleum refineries. Design criteria is based on the American Petroleum Institute's (API) Publication 421, "Design and Operation of Oil-Water Separators". Our API-421 Separator includes Diffusers, Reaction-Jets, Sludge Hopper, Flight & Rake System, Corrugated Plate Packs, Oil-Skimming Devices, etc. These internal components reduce flow turbulence, distribute the flow evenly, and help coalesce and remove the oil.
The following parameters are required for proper sizing and design:
Qm = Design flow (maximum wastewater flow).
T = Lowest wastewater temperature.
Sw = Specific gravity of the wastewater.
μ = Absolute/dynamic viscosity of the wastewater.
So = Specific gravity of the oil-fraction.
D = Diameter of the oil globule to be removed.
Additional design constraints are as follows:
Vh = Horizontal Velocity should be ≤3ft/minute or 15x the oil globule rate of rise (Vt), whichever is smaller.
d = Separation Depth should be 3-8 feet.
Depth (separator) to width (separator) ratio should range from 0.3 to 0.5.
Separator width is usually 6-20 feet.
Two Channels are usually provided for servicing or cleaning one channel while the other is in service.
Length to width ratio (L/B) should be ≥5.
d = Separation Depth should be 3-8 feet.
Depth (separator) to width (separator) ratio should range from 0.3 to 0.5.
Separator width is usually 6-20 feet.
Two Channels are usually provided for servicing or cleaning one channel while the other is in service.
Length to width ratio (L/B) should be ≥5.
API-421 Separator Package Includes
Engineered for Specific Application
Inlet Distribution System
Solids Collection and Removal
Oil Collection and Removal
Secondary Oil Removal with Optional Plate Pack
Inlet Distribution System
Solids Collection and Removal
Oil Collection and Removal
Secondary Oil Removal with Optional Plate Pack