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ESI - Model API-421 -Gravity-type Oil Water Separator
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 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.
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.
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