Oil Skimmers

Oil skimmers are pieces of equipment that remove oil floating on the surface of a fluid. In general, oil skimmers work because they are made of materials to which oil is more likely to stick than the fluid it is floating on. At the same time, the fluid has very little attraction to oil skimmers.

Oil skimmers are usually all that is necessary to remove oil from a liquid. In some cases, however, oil skimmers may be used to pre-treat a fluid. In this case, the oil skimmers remove as much of the oil as possible before more expensive and time-consuming measures are employed. Pre-treating the fluid with oil skimmers reduces the overall cost of cleaning the liquid.

There are two basic types of oil skimmers. One type is used to filter and remove oil, debris, and unwanted materials. The other type is used to recover or capture oil in a usable state. Typically, this second type of skimmer is used to clean up oil spills in factories, refineries, and bodies of Water. Applications for oil skimmers include in-plant pumps, tanks, and coolant systems as well as outdoor cooling and settling ponds. When selecting oil skimmers, important specifications to consider include capacity, removal or recovery rate, and total flow. When capacity is measured in gallons, flow is measured in gallons per minute (gpm) and the removal or recovery rate is expressed in gallons per hour (gph).

There are several different types of oil skimmers, though all designs depend on the laws of gravity and on surface tension in order to function.

Types

The six primary types of oil skimmers are belt, disk, drum or barrel style, mop, large tube or mini tube, and floating suction oil skimmers. Belt oil skimmers utilize a belt of stainless steel. This belt is lowered into the liquid that needs to be cleaned. The belt then passes through special wiper blades, which remove the oil from both sides of the liquid as it passes through. Disc oil skimmers use a disk that is rotated through the liquid. The oil is wiped off the liquid and placed into a special collection container within the skimmer. Disk oil skimmers are not a good choice for shallow liquids or for places where the liquid level fluctuates, because they are most effective when the entire disk is immersed.

Salient Features

  • Most inexpensive way to remove oil from Water.
  • Saves coolants by removing tramp oil.
  • Conserves parts wash Water by removing oily wastes.
  • Prevents plugging of spray heads and filters.
  • Reduces fluid disposal costs.
  • Skimmed oil can be recycled and reused as a lubricant or fuel.

Coolants and Cutting Fluids

When machine coolants become contaminated with tramp oils, four things usually occur

  • Coolant life is reduced.
  • Quality of machined parts is reduced.
  • In many cases, smoke will begin to appear in the shop, causing irritation to workers on the job
  • The fluid takes on a “rotten egg” odor.

Skimmers that remove tramp oils solve these problems and typically pay for themselves within a few months.

Oil Water Separator – Desorber

Desorber uses gravitational phase separation principle to separate oil and Water/liquid and does not use electric power or filters. The system consists of a heavy sludge separator and oil separation is done using CP interceptors and a coalescence separator. Both the separated oil and liquid can be utilized or disposed.

Features

  • No electricity required
  • No filters needed
  • No operating cost
  • No maintenance cost
  • Suitable for any liquid
  • Robust, compact, and re-locatable
  • Can be integrated with existing systems without modifications

Areas of Application

  • Petroleum refineries, lube blending plants
  • Oil drilling services
  • Mineral and vegetable oil plants
  • Automobile units and service stations
  • General engineering industries and machining centres
  • Industries employing industrial washing machines
  • Perfumery and essential oil industries
  • Industrial houses
  • Effluent treatment plants and sewage treatment plants

Questionnaires for New Oil Skimmer

SR
#
Description
1
Name of the Party with detailed Official address and contact nos.
2
Site address in detail where this plant is going to Install / Operate
3
 Source of Oil- Coolant / Engine Oil / Machine Oil / ETP / STP / Any other?
4
Details of O&G Trap / Tank in terms of LXWXH (in Meter). Also specify the level of Oil in Meter from the top of the tank. If possible send us the detailed Dwg /Picture Of Tank?
5
Approx Concentration Of Oil in Water in mg / lit?
6
Approx quantity of Oil to be removed on daily basis in Lit / Day?

Above data is compulsory to understand your requirement and to proceed further.

DAF (Dissolved Air Flotation)

DAF is a gravity seperation process whereby the separation of two phases is achieved by increasing the specific gravity difference of the two phases. This is achieved by attaching micro air bubbles, brought about by saturating water with air under pressure, and then expanding the wa terstream through valves to atmospheric pressure. These micro bubbles nucleate onto the solid particles to be separated, thus lowering the specific gravity and allowing contaminants to rise to the surface.