Category: oil sludge separation system

22inch big bowl decanter centrifuges unit for Kuwait Oil Sludge Treatment Company

As a manufacturer of decanter centrifuge unit manufacturer in China, GN solids control can design and produce different size decanter centrifuge, including 9 inch centrifuge, 14 inch centrifuge, 18 inch centrifuge, 22 inch big bowl decanter centrifuge, 25 inch centrifuge, 30 inch decanter centrifuge. Except for two phase separation decanter centrifuge, GN solids also produce 3 phase separation decanter centrifuge for solids, oil and water. The decanter centrifuge applications including drilling rig solids control system, drilling cuttings treatment system, oil sludge treatment system, dewatering unit, waste water treatment system, mining tailings treatment and construction slurry cleaning, etc.


We have 2 models of 22 inch big bowl decanter centrifuge, GNLW553-VFD and GNLW554-VFD. The bowl diameter is 22 inch (550mm), The bowl length is 71 inch (1800mm) or 91 inch (2310mm). The designed capacity is 500gpm, the typical capacity is 400gpm. The max bowl speed is 3000rpm, the typical bowl speed is 2500rpm, the max G force is 2719G, the typical G force is 1888G. The bowl speed and differential speed can be adjustable by VFD control panel operation.
The oil sludge is a mixture of oil, water, and solid contaminants that can result from oil spills, tank cleaning, or oil production processes. Proper treatment and disposal of oil sludge are critical to mitigate environmental damage and recover valuable resources.


GN oil sludge treatment system working process is as below:
The vacuum pump pick up the oil sludge or contaminated soil from waste pit and discharge to pre-mixing tank, by adding chemicals, heating and agitating in the pre-mixing tank to improve the separation efficiency of the further separation equipments. After screening module, the treated fluids will be feed to big bowl decanter centrifuge to separate to solids and liquids ( oil water mixture), working with chemical dosing unit and heating if need.

Tank cleaning unit and oil waste separation system

As the manufacturer of tank cleaning unit and oil waste separation system in China, GN solids control has designed and produced customized tank cleaning unit and oil waste treatment system for our client.


GN automatic tank cleaning unit is a closed loop system to clean the mud tank , oil tank, chemical tank and slurry tanks. GN tank cleaning unit can supply fresh water to the high pressure tank cleaning machine/nozzle which is mounted inside the tank to be cleaned. By the tank cleaning continuous process, it will minimize the water consumption and manpower. The high pressure pump is installed on the one skid tank cleaning unit which is used to supply the fresh water to the high pressure cleaning nozzle. We have two different design for the tank cleaning unit, one is the one skid design, all the components are installed on one skid for convenient transportation; the other one is the 3 skid design, it is composed of suction and discharged skid, treatment skid, storage skid, each skid with DNV lifting frame for operation at offshore rig platform. We can provide CNEX, ATEX and IEC EX as per project requirement.


After treated by the tank cleaning unit, the fluids can be treated by three phase decanter centrifuge separation system for oil, water, solids separation, the treated water can be also supplied to the high pressure cleaning machine, the oil can be recovery and the solids for final disposal. The three phase decanter centrifuge GNLW364 is designed for solids liquid liquid separation, with capacity 5m3/h. The max speed is 3964rpm and max G force 3200G. The screw propeller is protected by tungsten carbide tiles for longer working life. The mud distribution nozzle is protected by tungsten carbide inserts.
For more information regarding tank cleaning unit and oil waste separation unit, pls contact with GN solids control.

Oil Sludge treatment equipments manufacturer in China

Oil sludge treatment equipments, Solids control equipments and drilling cuttings treatment equipments are major equipments produced by GN Solids Control. We can design and produce customized oil sludge treatment system and equipments as client’s requirement. Generally, GN oil sludge treatment system is to use chemicals to wash the oil sludge by heating to 60-70 C degree.


After treatment, the user will get required oil, water and solids. The recycled water will be reused in the circulation system, the recycled oil will be sold or for other use, the discharged solids will be send for final disposal or to further treatment unit.
The oil sludge from crude oil tank cleaning, refinery plant waste oil sludge, drilling waste sludge can be treated by the oil sludge treatment system, including sludge vacuum pump, pre-mixing & heating module, chemical dosing unit, coarse solids separation module, 2 phase decanter centrifuge separation module, 3 phase centrifuge separation module. The major equipments including: Double deck shale shaker, vacuum pump, 2 phase decanter centrifuge, 3 phase decanter centrifuge, screw pump, submersible slurry pump, mud tank with heating lines and accessories.


When using the vacuum pump to pick up the oil sludge from waste pit, an air compressor is used to supply air for the operation, it is a 100% air operated pump without electricity. The discharge horizontal distance is 500 ~1000m, if the outlet pipe size is bigger than inlet pipe size, the transfer distance will be sacrificed. The vertical picking up depth is less than 3m, the clear water picking up depth is up to 9vmeters.
We have GNOST-02C, GNOST-05A, GNOST-15A with 2m3/h, 5m3/h, 15m3/h capacity for option. If you need to get high quality oil and water, lower operation cost and maintenance cost, simple operation, less oil on the discharged solids, pls contact with GN sales engineer.

Two Sets GNOST-05C GN Oil Sludge Treatment System for Overseas Client

Recently 2 sets of GNOST-05C oil sludge treatment system are ready for delivery. The oil sludge treatment system is customized design as per client’s requirement, including pre-mixing tank module, chemical dosing unit, three phase decanter centrifuge separation module and three phase disc centrifuge separation module.


The pre-mixing tank module is used to receive the oil sludge from picking up pump, supply heating steam to the pipelines inside mud tank to heat the oil sludge up to 60 ~70°C, add proper chemicals and the mud agitator will mix it continuously, the screw pump will transfer the well mixed oil sludge to 3 phase decanter centrifuge separation module together with chemical dosing unit.


The 3 phase decanter centrifuge module consist of 3 phase decanter centrifuge, mud agitator, water collection tank, oil catching tank, to get discharged water, oil and separated solids.


The 3 phase disc centrifuge separation module consists of 3 phase disc separator, oil buffer tank with oil pump, water buffer tank with water pump, the oily fluids is feed to three phase disc separator to get clear water, oil and few solids. The separation result of 3 phase decanter centrifuge and 3 phase disc centrifuge is different to meet different client’s treatment requirement, the maintenance cost and operation procedure is also different.
GN solids control have 3 models standard oil sludge treatment system with 1m3/h, 5m3/h and 15 m3/h treating capacity, which can be used to treat refinery oil tank bottom cleaning oil sludge treatment, drilling waste treatment, oily waste water treatment, we can also provide customized modules oil sludge treatment according to different projects. Except for oil sludge treatment system, GN also design and produce water based drilling cuttings treatment and oil based drilling cuttings treatment system, if you need a drilling waste management solution, pls contact with GN solids sales.

3 Phase Decanter Centrifuge for oil water separation to China ES Company

One unit of three phase decanter centrifuge is ready for delivery to China Environmental Science company for oil water separation.
The three phase decanter centrifuge working principal is as below:


The solids, oil and water with different gravity, so the generated centrifugal force is different. The solids with largest specific gravity will generate highest centrifugal force, the next is the heavy phase liquid ( water) and the light phase liquid (oil). Due to different centrifugal force, one solid layer and two liquid layer are formed. The solids to be pushed out by the screw, the liquids are separated out from their respective nozzles, the solids oil water separation can be achieved.


GN three phase decanter centrifuge is designed for oil water solids separation under 24 hours continuous working and easy operation & maintenance. The main components including centrifuge driving system, decanter bowl, screw inside the bow, centrifuge skid and VFD control panel.
The 3 phase decanter centrifuge is installed on the mud tank or on the telescopic skid with feeding pump, it has been widely used for oil sludge treatment system. The oil sludge can not be feed into the three phase decanter centrifuge directly, the sludge vacuum pump will pick up the oil sludge from waste pit to the pre-mixing tank, with chemical jetting, heating and agitating, the submersible slurry pump will suck from the pre-mixing tank to shale shaker module to separate the coarse solids and reduce solids content, the fluids discharged from shale shaker will be feed to two phase decanter centrifuge with proper chemicals for fine solids separation. The liquid treated by the 2 phase decanter centrifuge can be feed to three phase decanter centrifuge for oil water separation by adding proper chemicals.
For more information of three phase centrifuge, pls contact with GN solids control.