oil sludge separation system

Recently GN solids control shipped one set of oil and water separation package for China Oilfield Service company. The technical configuration is as below:


1) 2 phase decanter centrifuge to separate fine solids from fluids
2) Screw pump to feed the crude oil / oil sludge to decanter centrifuge
3) 3 phase centrifuge ( disc centrifuge) to separator oil from water, by adding proper chemicals, the recovered oil can be with BS & W below 3%, which can be accepted by most users.
4) Diaphragm pump to feed the clean fluids discharged from decanter centrifuge to disc centrifuge
5) Buffer storage tank for oil and water with oil pump and water pump, 2 liquid level meters are installed on each tank, when the oil or water level reached the setting level, the oil pump and water pump will pump the oil and water to the big storage tank
6) Package skid, all the above mentioned items sit on one skid for convenient transportation and operation

This is one modular of the oil sludge separation system, the complete oil sludge treatment system including waste pick up pump ( normally we used vacuum pump), Pre-mixing tank modular, screen modular to separate coarse solids, chemical dosing system, and the last modular is 3 phase separation package.
The pre-mixing tank is the most important part, when the solids content is higher than 30%, the waste oil sludge should be diluted by proper fluids and low the solids content below 30%, if necessary, the demulsifier should be added by this process for easier separation for the next phase separation. The mud agitator is agitating the oil sludge with chemical mixing evenly and the submersible slurry pump will transfer the fluids to screen modular to separate the coarse solids.
For more information, pls contact with GN solids control.

Recently one set of oil sludge treatment system is ready for shipment to a oilfield environmental solutions company with customized painting color. GN solids control can design and produce standard oil sludge treatment system with different treating capacity 1m3/h, 5m3/h, 15m3/h, also we can design as per client’s concept and technics process.


A standard oil sludge treatment system is consist of the modular below:

  1. Waste transfer unit: GN use our own solids vacuum pump to transfer the oil sludge from the waste pit to pre-mixing modular. The features of vacuum pump: (1)100% air operated pump without using electricity power, need air compressor for air supply. The user need to prepare one air compressor to provide air for both vacuum pump and the positive pressurized VFD control panel of the decanter centrifuge.
    (2) can be adopted to different types of oil sludge, heavy duty for continuously working

  2. (3) automatically and manually working for option for different requirement
    (4) max discharge distance is up to 1000m, max suction distance is 50m, it can used into the crude oil tank without labors in, it is user friendly pump to transfer the oil sludge out of the crude oil tank bottom.
    2 pre-mixing modular: including a pre-mixing tank equipped with heating lines inside the tank wall, when the user supply hot steam to the heating lines, the oil sludge will be heat to 60 degree for easier separation in the next separation step. Mud agitator with control panel to agitate the oil sludge with necessary chemicals and keep it flowable. The submersible slurry pump will transfer the pre-mixing oil sludge to the next process- coarse solids separation modular.
    3 coarse solids separation modular: it might be removed depends on if there is coarse solids in the oil sludge.
  3. fine solids separation modular for solids/ liquid separation by using VFD decanter centrifuge, and working together with chemical dosing system
  4. 3 phase centrifuge modular to separate oil from water.

One set of oil sludge treatment system is ready for shipment for one client in China. The technical configuration for GN oil sludge treatment system is as below:


1) Pre-mixing tank modular: including mud tank, heating lines inside mud tank, handrails, walkway, pipelines, stairs, etc. Submersible slurry pump as feeding pump of shale shaker, mud agitator to mix the oil sludge after heating and chemical jetting process, liquid level meter and electric control system.
2) Coarse shaker modular: including mud tank with heating lines, shale shaker installed on the shaker tank with internal spray system and sealing cover, mud agitator to mix the oil sludge, liquid level meter, and mud tank accessories with lightings, electric control system.


3) Centrifuge modular: including decanter centrifuge with feeding pump, 3 phase centrifuge with flushing pump, decanter centrifuge installed on the mud tank to separate solids from fluids, the clean fluids flow to 3 phase centrifuge to separate oil from water, the pure oil is recovered and flow to buffer tank with liquid level meter. The pure water is flow to buffer tank with liquid level meter, it can be pumped to water storage tank automatically or back to the circulation to reuse.
4) Chemical dosing system to add chemicals in premixing tank and centrifuge package modular, all the accessories are installed in the container for convenient shipment and better production.


We have 3 standard models oil sludge treatment system for option, with 1m3/h, 5m3/h, 15m3/h, we can also design customized oil sludge treatment system for our clients. Our engineer will fly to client’s jobsite for first time installation and commissioning and training the client’s engineer.
Except for oil sludge separation system, we also produce automatical tank cleaning system, waste water treatment unit,oil water separator, slant plate clarifier. And we have vacuum pump to feed the water to the oil sludge separation system.

Recently 1 set of oil sludge treatment plant is almost ready for shipment to Asia client, it is under testing in our facility before shipment. The treating capacity for oil sludge separation is 5 m3/h. We also have standard or customized designed oil sludge separation system with 1 m3/h and 15m3/h for option.


The general working process is as below:
GN sludge vacuum pump transfer the oil sludge from the waste pit/pond to the pre-mixing modular, the pre-mixing tank equipped with heating lines which can heat the oil sludge to increase the flowability of the oil sludge and increase the separation efficiency of the shale shaker, decanter centrifuge. By adding the chemicals, it will also increase the efficiency of the further process steps. 2 mud agitator and one submersible slurry pump are installed on the pre-mixing tank with electric control system.
Then the pre-treatment oil sludge is transferred to the shale shaker to separate the coarse solids by the submersible slurry pump, it also reduces the solids content of the oil sludge so that the centrifuge could separate the fine solids easily. The shaker screen is specially made with big opening to separate coarse solids to protect the decanter centrifuge.
The screw pump feed the oil sludge to the decanter centrifuge, the discharged fluids is flow to the 3 phase centrifuge to separate the oil and water. The clean water and pure oil is flow to the buffer tank , which will be pumped to the oil storage tank and water storage tank. The water can be used for the circulation again.
The 20ft container loading dewatering unit will be used when necessary with decanter centrifuge, the chemical jetting is to make the oil mixture easily separated by the decanter centrifuge.
If you need a customized solution for waste oil sludge treatment, pls contact with GN sales for more information.

GN solids control just come back from CIPPE 2019 oil exhibition in Beijing, China. We showed our advanced technology and equipments at the CIPPE oil show. Below is the photos taken in our stand.


1) Sludge Vacuum pump: it is the ideal pump to transfer the waste cuttings, waste sludge, oil sludge, drilling mud, cement, powder material and other industrial waste.
2) High G force drying shaker with 4 panel composite material shaker screens. The screen dimension 585x1165mm, we can install the shaker screen with API mesh size from API 20 to API 325 comply with API RP13C. The G force is up to 8.0G.
3) 14 inch bowl decanter centrifuge
4) 22 inch bowl decanter centrifuge for waste water treatment and waste sludge treatment and dewatering unit, the bowl diameter is 550mm, the bowl length is 2310mm, different with the normal drilling fluids treatment centrifuge, the GNLW554 series centrifuge can treat the discharged water much cleaner, it is ideal centrifuge for the project required very clear water.
5) Oil sludge separation system : The configuration is as below:
The Premixing tank, coarse solids separation shale shaker, decanter centrifuge, three phase centrifuge, chemical dosing unit, fluids buffer tank, shaker fluids collection tank, oil tank, water tank and complete skid. The mud agitator and heating lines installed on the premixing tank.
6) Vertical cuttings dryer for oil based drilling cuttings treatment.
7) Screw conveyor to transfer drilling cuttings to vertical cuttings dryer drilling waste management system
We got a lot of inquiries and positive interests for the oil sludge treatment unit. The working video for the oil sludge treatment is as below: By using proper chemicals, we can design the customized system for different requirement. If you need to know more information, pls get the brochure from our sales engineer.
http://www.gnsolidscontrol.com/video/oil-sludge-treatment-test-unit-working-video