OIL

OCS can provide the best solution in process design for Oil Recovery Technologies, such as Desalters, Dehydrators, CPI, IGF/IAF, Nutshellfilters and Hydrocyclones.

Desalters remove inorganic salt, water and sediment from the oil feedstock. This process prevents the severe corrosion of pipe walls, and other equipment in which they come in contact during processing.

Other technologies to remove oil from produced water may be perfomed in different steps, according to the quantity of oil to be removed, its density, particles, and to the required final performance (residual oil/water permitted for discharge or reuse).

CPI (Corrugated Plates Interceptor) is well effective for the separation of low density oil and when the oil load is high, granting its gravity separation (above 90%). It can be designed as pressure vessel or atmospheric tank, in which lamella packs are inserted, providing a longer path for the oil droplets to travel to the top of the tank. The oil collected on the surface of water is skimmed and flows continuously by: DISCOIL: a special skimmer with discs, patented by OCS. Useful for atmospheric tank, with a high efficiency of separation (for further information visit www.discoil.it).
TURNABLE PIPE: It is equipped with a groove which the oil overflows into. Useful for vessels that contain natural gas. Solids are extracted from the bottom of the tank.

NSF (Nutshell Filter): It can reduce the oil content with very high efficiency (above 95%) until saturation by oil. OCS uses black walnut and pecan nuts to treat the produced water. The oil adheres to the bed of nuts during the working cycle. When saturated the NSF have to be backwashed, through one of these three ways: by water scrubbing, mechanical agitation (plant is blanketed) or by air scouring (atmospheric pressure).

Hydrocyclones/Desanding: Hydrocyclones generate spinning motion of the fluid that creates centrifugal force to push heavier water outward and lighter oil (above 90%) into the middle core of the cone. The oil removal efficiency is higher with multi-cone modules that achieve small installation footprints. A special type, Desanding Hydrocyclone separates oil from water, but also suspended solid, such as sand. Through the centrifugal force, it handles solid particles up to 10-15 microns. Sand will be drained off through the base of the cone through a screw pump, instead oil and water will be separated from the surface and middle of the cone.

IGF/IAF (Induced Gas/Air Flotation): Induced flotation units use air/gas to float out oil more rapidly from the produced water (above 95%). The oil adheres to the bubbles and move upward to the surface. They’re equipped with some baffles to divert the down flow of the raw water opposite to the rising flow of micro-bubbles. The oil lumps on the surface is skimmed off.