GN Solids Control has been working on design and manufacture 2 phase decanter centrifuges and 3 phase disc-centrifuges for many years. As for now, GN Solids Control is able to manufacture more than 300 sets decanter centrifuges and 100 sets disc-centrifuges.
Several weeks ago, GN Solids Control provided another 3 phase separating module for an overseas customer. They will use this system to treat oil sludge that collected from different drilling rig sites, some of the oil sludge will also come from refinery oil plant and oil tank bottom.
1.GN 2 phase decanter centrifuge
GN Solids Control manufactures different sizes of decanter centrifuges includes 14 inch, 18 inch and 22 inch. All of the above mentioned decanter centrifuges are very popular when customers decided to treating oil sludge and drilling waste.
In this project, GN Solids Control provides one set of 22 inch size bowl decanter centrifuge. The rotating bowl is made of duplex stainless steel by centrifugal casting. Inside screw propeller is protected by tungsten carbide tiles along the screw edge. After treated by GN 2 phase decanter centrifuge, solids with oil is around 1% to 3% (need to add chemical in order to get better treating result, heat the oil sludge before treating is also highly recommended).
2.GN 3 phase disc-centrifuge
GN 3 phase disc-centrifuge is able to further treat the oil sludge discharged from GN 2 phase decanter centrifuge, after treated by disc-centrifuge we are able to get oil, water and solids separately: recovered oil contains base oil and water less than 3%, recovered water contains oil less than 500 to 1000 ppm (if use water treating equipment, oil can be eliminated to as low as 50 to 100 ppm).
In most situation, our customers use pre-treating and heating equipment before feed sludge into decanter centrifuge, so one set GN shaker or desilter is commonly seen.