Recently one set of 3 phase decanter centrifuge are shipped to Africa for oil tank bottom sludge cleaning project. The tricanter is widely used for oil, water, solids separation industry. The conditions to use the 3 phase decanter centrifuge is as below:
- The oil content in the material sludge should be over 10%, and solids phase less than 10%, the solids particle size should be less than 2mm.
- The solids phase should be specifically heaviest phase and the two liquid phase must have different densities. For example, oil and water, but solids must be the heaviest. GN produced 2 phase decanter centrifuge is to separate the solids with liquid, the 3 phase decanter centrifuge is to separate the solids- liquid – liquid.
The working principal of the 3 phase decanter centrifuge is sedimentation, when the sludge is feeding into the 3 phase decanter centrifuge feed tube, the sludge rotates with the bowl, due to the different specific gravity of the 3 phase, their centrifugal force is different. The heaviest phase solids with the greatest centrifugal force, the water’s centrifugal force in the middle, and lightest phase oil with smallest centrifugal force. So that it formed as 3 different layers inside the centrifuge bowl. The solids are pushed out by the rotated screw conveyor, the light liquids( oil) is discharged from the big end bottom fluids out, and the heavy liquids is discharged from the big end top fluids outlet port, they can be collected separately. The water can be sent to waste water treatment facility or to be reused for circulation of the oil sludge treatment process. The solids can be incinerated or be landfilled or sent to Thermal desorption unit. The oil is recovered for sell or to be reused.
We have 3 standard model 3 phase decanter centrifuge for option, GNSX-350, GNSX-450, GNSX-520.