Complex modules for collection and subsequent processing of solid and liquid oil sludge with the subsequent obtaining of refined oil or diesel oil.

oil recovery system
The oil recovery system from oil residues

The oil recovery system from oil residues operates the principle of three-phase tricanter centrifugal separation. Larger systems come in two modules, the first containing a pre-treatment unit, the second made up of a centrifuge with additional equipment depending on the model.

The first module consists of tanks receiving the input feed stock, then forming the suspension of a quality suitable for passing through the decanter. At the same time the suspension is being heated e.g. via steam heating coils. Before entering the first module the input feed stock passes through a filter system to remove any large debris.

The second module houses the decanter centrifuges.

The output of centrifuges is comprised of:

  • water piped to the water settling tank;
  • recovered oil piped into a separate recovered oil tank;
  • sediments discharged onto a conveyor belt that discharges directly into a truck or skip for transport away from the site.
Tricanter centrifuge operating principle.

With the bowl spinning at 3,000 rpm the feed slurry is fed through a fixed central pipe into the distributor located in the scroll. The product is accelerated smoothly to bowl speed as it passes through the feed ports in the scroll into the bowl.

Separation takes place in the conical cylindrical bowl when he slurry forms a rotating liquid tube under the centrifugal force caused by the bowl rotational speed. The solids in the slurry are deposited against the bowl wall and the remaining liquids separate into a light and heavy phase giving three concentric layers held against the bowl by centrifugal force.

The scroll is rotating at a differential speed to that of the bowl and conveys the separated solids in the direction of the conical end of the bowl. The length of time the solids remain in the bowl is an important factor in determining the dryness of the final solids discharge.

Tricanter (tree phase decanter)
Tricanter (tree phase decanter)

The slurry processing time can be adjusted by changing the differential speed of the scroll in relation to the bowl.

The separated solids are discharged through openings at the conical end of the bowl into a fixed discharge housing and then down the discharge chute.

While the liquid phases are being clarified they progress to the cylindrical end of the bowl where they are decanted through separate discharge systems to prevent cross-contamination.

The lighter phase is normally discharged under gravity whilst the heavier phase is removed under pressure by the variable pitch impeller. By altering the impeller during operation the clarity of the two liquid phases can be optimised.

All product contact parts are made of stainless steel. The other metal parts are protected against corrosion by multilayer finish.

We offer complex, ready-to-install systems including the oil sludge intake unit which allows pumping of sludge from a set depth and its further treatment by the decanters. Thus sludge pumped from a number of tanks is processed and separated into three phases: oil, water and solids.

We offer high-quality completely autonomous units, requiring almost no supervision, featuring short start-up time, easy fitting into the existing production cycle, low weight and compact design.

The units are designed for dehydration of sludge with suspended solids content ranging from 2000 mg/l up to 35000 mg/l, solids diameter ranging from several micron to 5 mm.

The weight content of solids in the suspension under treatment ranges from 0,1% to 65%.
Solids output humidity amounts to 68-75% depending on the discharged water composition.
Max. capacity = 100 m3/h, with power consumption = 337 kW.