Friess oil skimmers remove floating oils and fats easily, quickly and reliably from all sorts of liquids.
Our oil skimmers remove oils and fats quickly and reliably. Use the Friess technology for liquids of all kinds – whether cooling lubricant, cooling water, degreasing agents or waste water.
What is the principle behind it?
The basis and at the same time the most important element is the oil collector tube. It generates a rotary motion on the surface of the bath, which sets the floating oil in motion. The oil is then picked up by the tube and transported to the oil skimmer. From there, it is in turn transferred to a waste oil collection tank. The result is a reliably oil-free liquid surface.
The advantages at a glance:
In order to clean the cooling water in steel factories companies usually use a combination of scale pit, longitudinal clarifier and gravel filter.
A rectangular clarifier tank at a steel factory was equipped with an oil skimmer with a floating oil pick-up mop to remove oil and grease from the cooling water surface.
In the area around a refinery’s facilities the groundwater was suspected of being contaminated by hydrocarbons.
Increasing the Service Life of Coolant by Removing Tramp Oil from Coolant Tanks
Acchieving Process Optimisation and Cost Reduction with the use of an oil skimmer
Oil adheres to a special oleophilic tube, which gets stripped off in the tube skimmer. The oil collector tube is hollow and thus floats on the liquid, operating precisely at the contact point of the two phases, the upper one being oil. Welded as an endless ring, the oil collector tube continuously removes oil from liquid surfaces, no matter how large. Since the tube can be sized as short or long as necessary, not only can smaller tanks be kept free of tramp oil, but also large cooling basins or ponds.
Wherever oil and grease accumulate where they do not belong and float up, an oil skimmer can be used to remove the foreign oils and greases. To a tube skimmer it does not matter how dirty the surroundings are or how viscous the oil is. Thus, any number of areas of application can be found:
The belt skimmer consists of a motor with a drive roller and a mount. The drive roller drives a flat, endless belt, the skimmer belt. A loose pulley roller pulls the belt downward. The lower part of the belt is immersed in the floating oil phase. The oil adheres to the skimmer belt and is then moved into the water below. The oil still adhering to the belt is then conveyed upwards and removed from the belt by the scrapers.
Belt skimmers are mostly used for cooling lubricant applications in metalworking. Especially for the small coolant tanks of smaller machine tools, these small skimmers are very popular. The usually fairly small capacity of belt skimmers will usually suffice small amounts of tramp oil found in coolant tanks.
From time to time, belt skimmers are also used for oil removal in smaller oil separators. However, it is important to pay attention to the size of the separator, as belt skimmers cannot keep large areas free from oil and are only intended for really small applications.
Oil separators and oil skimmers are not identical. Both forms of oil removal take advantage of the difference in density between oil and water. The basic difference is that the oil separator retains the floating oils and greases by means of baffles, while the oil skimmer continuously removes the floating oils.
Oil separators consist of a tank through which a liquid is passed and settled so that the oil or grease it contains can float up. Often, internals are installed in an oil separator to improve the floating. By means of a baffle the liquid is separated from the oil or grease, as this now floats to the top and cannot flow under the baffle.
An oil skimmer, on the other hand, removes the already floating oil from a liquid surface.
Thus, although an oil skimmer and an oil separator have similar objectives, they are used in different conditions.
Often, oil separators and oil skimmers can be combined to have the advantages of both systems. For example, the oil separator is used to settle the liquid when this cannot happen elsewhere in the system, and the skimmer removes the accumulated oil from the oil separator so that it does not contain too much oil and the oil continues to flow despite the separation device. This is the procedure we use with our Skimmtelligent oil separators. These are used when the liquid is too turbulent for an oil skimmer and the oil cannot float.
Likewise, an existing oil separator can be retrofitted with an oil skimmer so that it does not have to be emptied at regular intervals using a suction truck. In addition, this also prevents too much oil from accumulating, which the separator can no longer retain.
Since 1972 we have been developing and producing oil skimmers Made in Germany for a wide range of requirements and industries. From consulting, manufacturing and sales, if necessary also on-site assembly, we are at your disposal. In addition, we offer other options for oil-water separation, the maintenance of cooling lubricants and oil cleaning. With us, environmental protection and cost savings go hand in hand.
Before you buy an oil skimmer, we have a questionnaire for you. This provides us with important information. We will gladly send you this as a PDF on request. Important factors for us are:
As a rule, we deliver our oil skimmers within one week. They are easy and self-explanatory to install, so that only in individual cases it is necessary to resort to our installation services.