Treat oily sludge with decanter centrifuge

TANGSHAN, China - April 27, 2013 - PRLog -- Oily sludge varies over a wide range with regard to its composition and properties. Normally oily sludge are from waste oil drilling mud,oilfield pit sludge waste,storage tank bottom sludge or refinery effluent treatment. Due to the variability of the oily sludge, The treatment system should be tailored to each project's needs,rather than being a standard unit put to work under all kinds coniditons. Decanter centrifuge is a very versatile equipment of most oil sludge treatment plants. because decanter centrifuge can achive a very good solids/liquid separation.

http://www.gnsolidscontrol.com/decanting-centrifuge/

Operating principle of decanter centrifuge

decanter centrifuges making the solids/liquid separation via the principle of sedimentation by making use of the different specific gravity of the oil sludge’s components. The decanter’s operating principle is analogous to a continuously fed sedimentation tank with a bottom scraper. for fine solids , the settling time to the bottom of tank under natural gravity is too long to be economical. decanter centrifuge can tremendously shorten the settling time by spinning the feeding slurrys so fast that centrifugal accelerations up to several thousand times g. Using the analogy of the sedimentation tank again. The tank rolled into a cylinder with the tank bottom becoming the cylinder wall, and the water body and scraper being located inside the cylinder. This cylinder called  bowl,  is rotated around its longitudinal axis to creat the required centrifugal acceleration. feed into this system is continuous via a fixed pipe extending from the outside into the centor of the cylinder. In this system, The solids will move radialy outward and settle on the inner surface of the cylinder's wall. The shape of the bottom scraper will be changed to the screw conveyor that will rotate with a slightly different speed to the bowl in order to convey the sediment toward the outlet.

http://www.gnsolidscontrol.com/drilling-fluids/oil-sludge-separation-system-kuwait-oil-company

Specification of GNLW553VFD Decanter Centrifuge.

Bowl Diameter:       550mm(22inch)
Bowl Length:         1800mm(71inch)
Max Capacity:        500GPM(110m3/h)
Normal Capacity:     400GPM(90m3/h)
Bowl Speed(Max):     3000 RPM
Bowl Speed(Typical): 2500 RPM
G-force(Max):        2770
Separation point:    2-5 Microns
Main Drive:          90Kw(120HP)
Back Drive:          37Kw(50HP)

As a top manufactuer of decanter centrifuge. GN supplied decanter centrifuge to PDVSA and Pertamina, KOC (Kuwait Oil Company). With more and more cooperation with world oil company. GN Solids Control start to supply more and more decanter centrifuge for big projects which needs solids control, oily sludge separation.If anyone need decanter centrifuge. Please feel free to contact with GN to get more information and advises from our experienced engineers.