Energy Specialties International (ESI) products

The simplest form of primary treating equipment is a skim tank or vessel. These units, which can be pressure vessels or atmospheric tanks, are normally designed to provide large residence times during which coalescence and gravity separation can occur. Skimmers can be either vertical or horizontal.

This ESI CPI separator is generally considered an “upflow” separator. The CPI “Pack” is designed to function installed at an angle of 60 degrees to the horizontal plane with plates spaced 25mm to minimize plugging. Water enters the inlet nozzle and distribution header low in the primary solids/sludge chamber. The heaviest solids/sludge settle in the primary chamber for discharge through the clean out nozzle. Water flows down and through the perforated distribution baffle. The contaminated liquid enters from the bottom of the pack and flows up through the pack end. Solids accumulate on the plates and counterflows the waste flow to the bottom of the plates.

Tests at a major University show that ESI`s new Spiral Ramp LQ-R`s design can improve the efficiency of hydrocyclones by as much as 50% (see graph). Converts pressure energy to internal centrifugal energy. Geometry creates vortex to enhance gravity. Oil droplets coalesce in central code (> 5-20 microns). Insensitive to motion or surges. No moving parts. Light Weight. Unaffected by Motion. No chemicals or power (if high enough pressure). Small oily reject stream (2% of inlet flow). Compact Design.

The ESI CPI is designed and engineered for oil recovery applications where energy usage and equipment costs are a determining factor. The CPI is a gravity separator where efficiency is determined by the rising velocity of the smallest particles that will be intercepted, usually greater than 50 microns. The plate pack is made of many closely spaced corrugated plates. Using Stoke’s Law, the rate of rise of the oil can be calculated. The greatest advantage of the ESI CPI is that the rising distance is usually less than one inch. This allows the oil droplets to rise and coalesce to larger droplets or sand to fall out of the flowing stream.

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 ESI Quadair Induced Gas Flotation Unit is designed and engineered to remove oil emulsions, suspended solids and organic materials from wastewater. The Quadair requires minimal operating power, uses less floor space and has low installation and maintenance costs. Standard Quadair units are available (see sizing table) & ESI can design special models to meet specific needs. The ESI Quadair Induced Gas Flotation Unit is designed and engineered to remove oil emulsions, suspended solids and organic materials from wastewater.

Compact and reliable, our VertiFloat purifies wastewater using 2-stages of oil droplet coalescence along with a single flotation-compartment conserving precious deck space and weight.